CHANGELOG.md: Add note about imports

A few months ago I had an issue setting up mocking because I was
trying to be clever importing these libraries only when I needed
them rather than at the global scope. Someone pointed out to me
that if the imports are at the top of the file Falcon will load
them once when the WSGI server starts, whereas if they are in the
on_get() or on_post() they will load for every request! Also, it
seems that PEP8 recommends keeping imports at the top of the file
anyways, so I will just do that.

Imports sorted with isort.

See: https://www.python.org/dev/peps/pep-0008/#imports

.build.yml

@@ -0,0 +1,21 @@
+image: archlinux
+packages:
+  - python-poetry
+  - postgresql
+sources:
+  - https://git.sr.ht/~alanorth/dspace-statistics-api
+tasks:
+  - setup: |
+      id
+      psql --version
+      sudo su - postgres -c "initdb --locale en_US.UTF-8 -E UTF8 -D '/var/lib/postgres/data'"
+      sudo systemctl start postgresql
+      createuser -U postgres dspacestatistics
+      psql -U postgres -c "ALTER USER dspacestatistics WITH PASSWORD 'dspacestatistics'"
+      createdb -U postgres -O dspacestatistics --encoding=UNICODE dspacestatistics
+      cd dspace-statistics-api
+      psql -U postgres -d dspacestatistics < tests/dspacestatistics.sql
+      poetry install --no-root
+  - test: |
+      cd dspace-statistics-api
+      poetry run pytest

.drone.yml

@@ -0,0 +1,153 @@
+kind: pipeline
+type: docker
+name: python39
+
+steps:
+- name: setup
+  image: postgres:10-alpine
+  environment:
+    PGPASSWORD: postgres
+  commands:
+  - id
+  - psql --version
+  - sleep 5
+  - pg_isready -h database -U postgres -d dspacestatistics
+  - createuser -h database -U postgres dspacestatistics
+  - psql -h database -U postgres -c "ALTER USER dspacestatistics WITH PASSWORD 'dspacestatistics'"
+  - psql -h database -U postgres -d dspacestatistics < tests/dspacestatistics.sql
+
+- name: test
+  image: python:3.9-slim
+  environment:
+    PGPASSWORD: dspacestatistics
+    DATABASE_HOST: database
+  commands:
+  - id
+  - python -V
+  - apt update && apt install -y gcc
+  - pip install -r requirements-dev.txt
+  - pytest
+
+services:
+- name: database
+  image: postgres:10-alpine
+  environment:
+    POSTGRES_USER: postgres
+    POSTGRES_PASSWORD: postgres
+    POSTGRES_DB: dspacestatistics
+
+---
+kind: pipeline
+type: docker
+name: python38
+
+steps:
+- name: database
+  image: postgres:10-alpine
+  detach: true
+  environment:
+    POSTGRES_USER: postgres
+    POSTGRES_PASSWORD: postgres
+    POSTGRES_DB: dspacestatistics
+
+- name: setup
+  image: postgres:10-alpine
+  environment:
+    PGPASSWORD: postgres
+  commands:
+  - id
+  - psql --version
+  - sleep 5
+  - pg_isready -h database -U postgres -d dspacestatistics
+  - createuser -h database -U postgres dspacestatistics
+  - psql -h database -U postgres -c "ALTER USER dspacestatistics WITH PASSWORD 'dspacestatistics'"
+  - psql -h database -U postgres -d dspacestatistics < tests/dspacestatistics.sql
+
+- name: test
+  image: python:3.8-slim
+  environment:
+    PGPASSWORD: dspacestatistics
+    DATABASE_HOST: database
+  commands:
+  - id
+  - python -V
+  - pip install -r requirements-dev.txt
+  - pytest
+
+---
+kind: pipeline
+type: docker
+name: python37
+
+steps:
+- name: database
+  image: postgres:10-alpine
+  detach: true
+  environment:
+    POSTGRES_USER: postgres
+    POSTGRES_PASSWORD: postgres
+    POSTGRES_DB: dspacestatistics
+
+- name: setup
+  image: postgres:10-alpine
+  environment:
+    PGPASSWORD: postgres
+  commands:
+  - id
+  - psql --version
+  - sleep 5
+  - pg_isready -h database -U postgres -d dspacestatistics
+  - createuser -h database -U postgres dspacestatistics
+  - psql -h database -U postgres -c "ALTER USER dspacestatistics WITH PASSWORD 'dspacestatistics'"
+  - psql -h database -U postgres -d dspacestatistics < tests/dspacestatistics.sql
+
+- name: test
+  image: python:3.7-slim
+  environment:
+    PGPASSWORD: dspacestatistics
+    DATABASE_HOST: database
+  commands:
+  - id
+  - python -V
+  - pip install -r requirements-dev.txt
+  - pytest
+
+---
+kind: pipeline
+type: docker
+name: python36
+
+steps:
+- name: database
+  image: postgres:10-alpine
+  detach: true
+  environment:
+    POSTGRES_USER: postgres
+    POSTGRES_PASSWORD: postgres
+    POSTGRES_DB: dspacestatistics
+
+- name: setup
+  image: postgres:10-alpine
+  environment:
+    PGPASSWORD: postgres
+  commands:
+  - id
+  - psql --version
+  - sleep 5
+  - pg_isready -h database -U postgres -d dspacestatistics
+  - createuser -h database -U postgres dspacestatistics
+  - psql -h database -U postgres -c "ALTER USER dspacestatistics WITH PASSWORD 'dspacestatistics'"
+  - psql -h database -U postgres -d dspacestatistics < tests/dspacestatistics.sql
+
+- name: test
+  image: python:3.6-slim
+  environment:
+    PGPASSWORD: dspacestatistics
+    DATABASE_HOST: database
+  commands:
+  - id
+  - python -V
+  - pip install -r requirements-dev.txt
+  - pytest
+
+# vim: ts=2 sw=2 et

.travis.yml

@@ -1,11 +0,0 @@
-language: python
-python:
-  - "3.5"
-  - "3.6"
-  - "3.7-dev"
-script: pip install -r requirements.txt
-branches:
-  only:
-    - master
-
-# vim: ts=2 sw=2 et

CHANGELOG.md

@@ -4,46 +4,143 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
-### [0.7.0] - 2018-11-07
-## Added
+## Unreleased
+### Changed
+- Add ORDER BY to /items resource to make sure results are returned
+deterministically
+- Use `fl` parameter in indexer to return only the id field
+- Minor refactoring of imports for PEP8 style
+
+## [1.3.2] - 2020-11-18
+### Fixed
+- Minor issue with limit parameter (> 0)
+- Minor issue with limit parameter (<= 100)
+
+### Changed
+- Minor refactor in Solr bot filtering
+
+### Updated
+- Run poetry update
+
+## [1.3.1] - 2020-10-06
+### Changed
+- Fix issue with requirements.txt caused by poetry's export
+
+## [1.3.0] - 2020-10-06
+### Changed
+- Minor refactoring of indexer
+
+### Added
+- Ability to get statistics for arbitrary items and date ranges by POSTing a JSON-formatted request to /items as opposed to the current `GET /items` which returns pre-indexed all-time stats for all items
+
+### Updated
+- Run pipenv update, bringing minor updates to pytest, psycopg2-binary, etc
+
+## [1.2.1] - 2020-03-02
+### Changed
+- Help text in API docs should reference UUIDs
+- Sample SQL file for tests should use UUIDs
+
+## [1.2.0] - 2020-03-02
+### Changed
+- Remove Python 3.5 from TravisCI because black requires Python >= 3.6
+- Adapt API for DSpace 6+ UUIDs
+  - This requires dropping the statistics database and re-indexing
+
+### Updated
+- Run pipenv update, bringing requests 2.23.0 and pytest 5.3.5
+
+## [1.1.1] - 2019-11-27
+### Added
+- Configuration for automatic sorting of imports with isort
+- Configuration for automatic code formatting with black
+
+### Updated
+- Run pipenv update, bringing psycopg2 2.8.4, requests 2.22.0, pytest 5.3.1,
+and gunicorn 20.0.4
+
+### Changed
+- Use Ubuntu 18.04 "Bionic" for TravisCI builds
+- Use Python 3.8.0 for pipenv
+- Minor syntax issues highlighted by flake8
+
+## [1.1.0] - 2019-05-05
+## Updated
+- Falcon 2.0.0 (@alanorth)
+
+## [1.0.0] - 2019-04-15
+### Added
+- Build configuration for build.sr.ht
+
+### Updated
+- Run pipenv update, bringing pytest version 4.4.0, psycopg-binary 2.8.2, etc
+- sr.ht and TravisCI configuration to disable emojis and animation to keep logs clean
+
+### Changed
+- Use vanilla requests library instead of SolrClient
+- Use one-based paging in indexer output (for human readability)
+
+## [0.9.0] - 2019-01-22
+### Updated
+- pytest version 4.0.0
+- Fix indexing of sharded statistics cores ([#10))
+- Handle case of missing views/downloads gracefully
+
+## [0.8.1] - 2018-11-14
+### Changed
+- README.md to recommend using vanilla Python virtual environments and pip instead of pipenv
+- Regenerate pipenv environment to capture only direct dependencies
+
+### Added
+- `requirements-dev.txt` for installing development packages with pip
+
+## [0.8.0] - 2018-11-11
+### Changed
+- Properly handle database connection errors
+
+### Added
+- API tests with pytest
+
+## [0.7.0] - 2018-11-07
+### Added
 - Ability to configure PostgreSQL database port with DATABASE_PORT environment variable (defaults to 5432)
 - Hound CI configuration to validate pull requests against PEP 8 code style with Flake8
 - Configuration for [pipenv](https://pipenv.readthedocs.io/en/latest/)
 
-## Changed
+### Changed
 - Use a database management class with Python context management to automatically open/close connections and cursors
 
-## Changed
+### Changed
 - Validate code against PEP 8 style guide with Flake8
 
-### [0.6.1] - 2018-10-31
-## Added
+## [0.6.1] - 2018-10-31
+### Added
 - API documentation at root path (/)
 
-### [0.6.0] - 2018-10-31
-## Changed
+## [0.6.0] - 2018-10-31
+### Changed
 - Refactor project structure (note breaking changes to API and indexing invocation, see contrib and README.md)
 
-### [0.5.2] - 2018-10-28
-## Changed
+## [0.5.2] - 2018-10-28
+### Changed
 - Update library versions in requirements.txt
 
-### [0.5.1] - 2018-10-24
-## Changed
+## [0.5.1] - 2018-10-24
+### Changed
 - Use Python's native json instead of ujson
 
-### [0.5.0] - 2018-10-24
-## Added
+## [0.5.0] - 2018-10-24
+### Added
 - Example nginx configuration to README.md
 
-## Changed
+### Changed
 - Don't initialize Solr connection in API
 
-### [0.4.3] - 2018-10-17
-## Changed
+## [0.4.3] - 2018-10-17
+### Changed
 - Use pip install as script for Travis CI
 
-## Improved
+### Improved
 - Documentation for deployment and testing
 
 ## [0.4.2] - 2018-10-04
@@ -57,7 +154,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [0.4.1] - 2018-09-26
 ### Changed
-- Use execute_values() to batch insert records to PostgreSQL
+- Use `execute_values()` to batch insert records to PostgreSQL
 
 ## [0.4.0] - 2018-09-25
 ### Fixed

Pipfile

@@ -1,25 +0,0 @@
-[[source]]
-url = "https://pypi.org/simple"
-verify_ssl = true
-name = "pypi"
-
-[packages]
-certifi = "==2018.10.15"
-chardet = "==3.0.4"
-falcon = "==1.4.1"
-gunicorn = "==19.9.0"
-idna = "==2.7"
-kazoo = "==2.5.0"
-"psycopg2-binary" = "==2.7.5"
-python-mimeparse = "==1.6.0"
-requests = "==2.20.0"
-six = "==1.11.0"
-solrclient = {ref = "kazoo-2.5.0", git = "https://github.com/alanorth/SolrClient.git"}
-"urllib3" = "==1.24"
-
-[dev-packages]
-"flake8" = "*"
-ipython = "*"
-
-[requires]
-python_version = "3.6"

Pipfile.lock

@@ -1,273 +0,0 @@
-{
-    "_meta": {
-        "hash": {
-            "sha256": "74430260b3271348f65792cc7f9cadc5d2036abc4a5fc958524239656ffabb4f"
-        },
-        "pipfile-spec": 6,
-        "requires": {
-            "python_version": "3.6"
-        },
-        "sources": [
-            {
-                "name": "pypi",
-                "url": "https://pypi.org/simple",
-                "verify_ssl": true
-            }
-        ]
-    },
-    "default": {
-        "certifi": {
-            "hashes": [
-                "sha256:339dc09518b07e2fa7eda5450740925974815557727d6bd35d319c1524a04a4c",
-                "sha256:6d58c986d22b038c8c0df30d639f23a3e6d172a05c3583e766f4c0b785c0986a"
-            ],
-            "index": "pypi",
-            "version": "==2018.10.15"
-        },
-        "chardet": {
-            "hashes": [
-                "sha256:84ab92ed1c4d4f16916e05906b6b75a6c0fb5db821cc65e70cbd64a3e2a5eaae",
-                "sha256:fc323ffcaeaed0e0a02bf4d117757b98aed530d9ed4531e3e15460124c106691"
-            ],
-            "index": "pypi",
-            "version": "==3.0.4"
-        },
-        "falcon": {
-            "hashes": [
-                "sha256:0a66b33458fab9c1e400a9be1a68056abda178eb02a8cb4b8f795e9df20b053b",
-                "sha256:3981f609c0358a9fcdb25b0e7fab3d9e23019356fb429c635ce4133135ae1bc4"
-            ],
-            "index": "pypi",
-            "version": "==1.4.1"
-        },
-        "gunicorn": {
-            "hashes": [
-                "sha256:aa8e0b40b4157b36a5df5e599f45c9c76d6af43845ba3b3b0efe2c70473c2471",
-                "sha256:fa2662097c66f920f53f70621c6c58ca4a3c4d3434205e608e121b5b3b71f4f3"
-            ],
-            "index": "pypi",
-            "version": "==19.9.0"
-        },
-        "idna": {
-            "hashes": [
-                "sha256:156a6814fb5ac1fc6850fb002e0852d56c0c8d2531923a51032d1b70760e186e",
-                "sha256:684a38a6f903c1d71d6d5fac066b58d7768af4de2b832e426ec79c30daa94a16"
-            ],
-            "index": "pypi",
-            "version": "==2.7"
-        },
-        "kazoo": {
-            "hashes": [
-                "sha256:8db774f7bdece7d0dc7decb21539ff0852e42c2ffe1c28d7f1ff6f9292a1c3a4",
-                "sha256:a5fa2e400c5068cfee9e86b35cf0dab8232b574152d8e3590d823b3e2426ab5e"
-            ],
-            "index": "pypi",
-            "version": "==2.5.0"
-        },
-        "psycopg2-binary": {
-            "hashes": [
-                "sha256:04afb59bbbd2eab3148e6816beddc74348078b8c02a1113ea7f7822f5be4afe3",
-                "sha256:098b18f4d8857a8f9b206d1dc54db56c2255d5d26458917e7bcad61ebfe4338f",
-                "sha256:0bf855d4a7083e20ead961fda4923887094eaeace0ab2d76eb4aa300f4bbf5bd",
-                "sha256:197dda3ffd02057820be83fe4d84529ea70bf39a9a4daee1d20ffc74eb3d042e",
-                "sha256:278ef63afb4b3d842b4609f2c05ffbfb76795cf6a184deeb8707cd5ed3c981a5",
-                "sha256:3cbf8c4fc8f22f0817220891cf405831559f4d4c12c4f73913730a2ea6c47a47",
-                "sha256:4305aed922c4d9d6163ab3a41d80b5a1cfab54917467da8168552c42cad84d32",
-                "sha256:47ee296f704fb8b2a616dec691cdcfd5fa0f11943955e88faa98cbd1dc3b3e3d",
-                "sha256:4a0e38cb30457e70580903367161173d4a7d1381eb2f2cfe4e69b7806623f484",
-                "sha256:4d6c294c6638a71cafb82a37f182f24321f1163b08b5d5ca076e11fe838a3086",
-                "sha256:4f3233c366500730f839f92833194fd8f9a5c4529c8cd8040aa162c3740de8e5",
-                "sha256:5221f5a3f4ca2ddf0d58e8b8a32ca50948be9a43351fda797eb4e72d7a7aa34d",
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-                "sha256:789bd89d71d704db2b3d5e67d6d518b158985d791d3b2dec5ab85457cfc9677b",
-                "sha256:7b94d29239efeaa6a967f3b5971bd0518d2a24edd1511edbf4a2c8b815220d07",
-                "sha256:89bc65ef3301c74cf32db25334421ea6adbe8f65601ea45dcaaf095abed910bb",
-                "sha256:89d6d3a549f405c20c9ae4dc94d7ed2de2fa77427a470674490a622070732e62",
-                "sha256:97521704ac7127d7d8ba22877da3c7bf4a40366587d238ec679ff38e33177498",
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-                "sha256:a6d32c37f714c3f34158f3fa659f3a8f2658d5f53c4297d45579b9677cc4d852",
-                "sha256:a89ee5c26f72f2d0d74b991ce49e42ddeb4ac0dc2d8c06a0f2770a1ab48f4fe0",
-                "sha256:b4c8b0ef3608e59317bfc501df84a61e48b5445d45f24d0391a24802de5f2d84",
-                "sha256:b5fcf07140219a1f71e18486b8dc28e2e1b76a441c19374805c617aa6d9a9d55",
-                "sha256:b86f527f00956ecebad6ab3bb30e3a75fedf1160a8716978dd8ce7adddedd86f",
-                "sha256:be4c4aa22ba22f70de36c98b06480e2f1697972d49eb20d525f400d204a6d272",
-                "sha256:c2ac7aa1a144d4e0e613ac7286dae85671e99fe7a1353954d4905629c36b811c",
-                "sha256:de26ef4787b5e778e8223913a3e50368b44e7480f83c76df1f51d23bd21cea16",
-                "sha256:e70ebcfc5372dc7b699c0110454fc4263967f30c55454397e5769eb72c0eb0ce",
-                "sha256:eadbd32b6bc48b67b0457fccc94c86f7ccc8178ab839f684eb285bb592dc143e",
-                "sha256:ecbc6dfff6db06b8b72ae8a2f25ff20fbdcb83cb543811a08f7cb555042aa729"
-            ],
-            "index": "pypi",
-            "version": "==2.7.5"
-        },
-        "python-mimeparse": {
-            "hashes": [
-                "sha256:76e4b03d700a641fd7761d3cd4fdbbdcd787eade1ebfac43f877016328334f78",
-                "sha256:a295f03ff20341491bfe4717a39cd0a8cc9afad619ba44b77e86b0ab8a2b8282"
-            ],
-            "index": "pypi",
-            "version": "==1.6.0"
-        },
-        "requests": {
-            "hashes": [
-                "sha256:99dcfdaaeb17caf6e526f32b6a7b780461512ab3f1d992187801694cba42770c",
-                "sha256:a84b8c9ab6239b578f22d1c21d51b696dcfe004032bb80ea832398d6909d7279"
-            ],
-            "index": "pypi",
-            "version": "==2.20.0"
-        },
-        "six": {
-            "hashes": [
-                "sha256:70e8a77beed4562e7f14fe23a786b54f6296e34344c23bc42f07b15018ff98e9",
-                "sha256:832dc0e10feb1aa2c68dcc57dbb658f1c7e65b9b61af69048abc87a2db00a0eb"
-            ],
-            "index": "pypi",
-            "version": "==1.11.0"
-        },
-        "solrclient": {
-            "git": "https://github.com/alanorth/SolrClient.git",
-            "ref": "c629e3475be37c82770b2be61748be7e29882648"
-        },
-        "urllib3": {
-            "hashes": [
-                "sha256:41c3db2fc01e5b907288010dec72f9d0a74e37d6994e6eb56849f59fea2265ae",
-                "sha256:8819bba37a02d143296a4d032373c4dd4aca11f6d4c9973335ca75f9c8475f59"
-            ],
-            "index": "pypi",
-            "version": "==1.24"
-        }
-    },
-    "develop": {
-        "backcall": {
-            "hashes": [
-                "sha256:38ecd85be2c1e78f77fd91700c76e14667dc21e2713b63876c0eb901196e01e4",
-                "sha256:bbbf4b1e5cd2bdb08f915895b51081c041bac22394fdfcfdfbe9f14b77c08bf2"
-            ],
-            "version": "==0.1.0"
-        },
-        "decorator": {
-            "hashes": [
-                "sha256:2c51dff8ef3c447388fe5e4453d24a2bf128d3a4c32af3fabef1f01c6851ab82",
-                "sha256:c39efa13fbdeb4506c476c9b3babf6a718da943dab7811c206005a4a956c080c"
-            ],
-            "version": "==4.3.0"
-        },
-        "flake8": {
-            "hashes": [
-                "sha256:6a35f5b8761f45c5513e3405f110a86bea57982c3b75b766ce7b65217abe1670",
-                "sha256:c01f8a3963b3571a8e6bd7a4063359aff90749e160778e03817cd9b71c9e07d2"
-            ],
-            "index": "pypi",
-            "version": "==3.6.0"
-        },
-        "ipython": {
-            "hashes": [
-                "sha256:a5781d6934a3341a1f9acb4ea5acdc7ea0a0855e689dbe755d070ca51e995435",
-                "sha256:b10a7ddd03657c761fc503495bc36471c8158e3fc948573fb9fe82a7029d8efd"
-            ],
-            "index": "pypi",
-            "version": "==7.1.1"
-        },
-        "ipython-genutils": {
-            "hashes": [
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-                "sha256:eb2e116e75ecef9d4d228fdc66af54269afa26ab4463042e33785b887c628ba8"
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-            "version": "==4.6.0"
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-        "traitlets": {
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-    }
-}

README.md

@@ -1,19 +1,29 @@
-# DSpace Statistics API [![Build Status](https://travis-ci.org/ilri/dspace-statistics-api.svg?branch=master)](https://travis-ci.org/ilri/dspace-statistics-api)
-DSpace stores item view and download events in a Solr "statistics" core. This information is available for use in the various DSpace user interfaces, but is not exposed externally via any APIs. The DSpace 4+ [REST API](https://wiki.duraspace.org/display/DSDOC5x/REST+API), for example, only exposes information about communities, collections, item metadata, and bitstreams.
+# DSpace Statistics API [![Build Status](https://ci.mjanja.ch/api/badges/alanorth/dspace-statistics-api/status.svg?ref=refs/heads/v6_x)](https://ci.mjanja.ch/alanorth/dspace-statistics-api) [![builds.sr.ht status](https://builds.sr.ht/~alanorth/dspace-statistics-api.svg)](https://builds.sr.ht/~alanorth/dspace-statistics-api?)
+DSpace stores item view and download events in a Solr "statistics" core. This information is available for use in the various DSpace user interfaces, but is not exposed externally via any APIs. The DSpace 4/5/6 [REST API](https://wiki.lyrasis.org/display/DSDOC5x/REST+API), for example, only exposes _metadata_ about communities, collections, items, and bitstreams.
 
-This project contains an indexer and a [Falcon-based](https://falcon.readthedocs.io/) web application to make the statistics available via simple REST API. You can read more about the Solr queries used to gather the item view and download statistics on the [DSpace wiki](https://wiki.duraspace.org/display/DSPACE/Solr).
+- If your DSpace is version 4 or 5, use [dspace-statistics-api v1.1.1](https://github.com/ilri/dspace-statistics-api/releases/tag/v1.1.1)
+- If your DSpace is version 6+, use [dspace-statistics-api v1.2.0 or greater](https://github.com/ilri/dspace-statistics-api/releases/tag/v1.2.0)
+
+This project contains an indexer and a [Falcon-based](https://falcon.readthedocs.io/) web application to make the statistics available via a simple REST API. You can read more about the Solr queries used to gather the item view and download statistics on the [DSpace wiki](https://wiki.lyrasis.org/display/DSPACE/Solr).
+
+If you use the DSpace Statistics API please cite:
+
+*Orth, A. 2018. DSpace statistics API. Nairobi, Kenya: ILRI. https://hdl.handle.net/10568/99143.*
 
 ## Requirements
 
-- Python 3.5+
+- Python 3.6+
 - PostgreSQL version 9.5+ (due to [`UPSERT` support](https://wiki.postgresql.org/wiki/UPSERT))
-- DSpace with [Solr usage statistics enabled](https://wiki.duraspace.org/display/DSDOC5x/SOLR+Statistics) (tested with 5.x)
+- DSpace with [Solr usage statistics enabled](https://wiki.lyrasis.org/display/DSDOC5x/SOLR+Statistics) (tested with 5.8+ and 6.3)
 
-## Installation and Testing
-Create a Python virtual environment and install the dependencies using [`pipenv`](https://github.com/pypa/pipenv):
+## Installation
+Create a Python virtual environment and install the dependencies:
 
-    $ pipenv install --dev
-    $ pipenv shell
+    $ python3 -m venv venv
+    $ source venv/bin/activate
+    $ pip install -r requirements.txt
+
+## Running
 
 Set up the environment variables for Solr and PostgreSQL:
 
@@ -35,6 +45,15 @@ Test to see if there are any statistics:
 
     $ curl 'http://localhost:8000/items?limit=1'
 
+## Testing
+Install development packages using pip:
+
+    $ pip install -r requirements-dev.txt
+
+Run tests:
+
+    $ pytest
+
 ## Deployment
 There are example systemd service and timer units in the `contrib` directory. The API service listens on localhost by default so you will need to expose it publicly using a web server like nginx.
 
@@ -62,20 +81,43 @@ The API exposes the following endpoints:
 
   - GET `/` — return a basic API documentation page.
   - GET `/items` — return views and downloads for all items that Solr knows about¹. Accepts `limit` and `page` query parameters for pagination of results (`limit` must be an integer between 1 and 100, and `page` must be an integer greater than or equal to 0).
-  - GET `/item/id` — return views and downloads for a single item (`id` must be a positive integer). Returns HTTP 404 if an item id is not found.
+  - POST `/items` — return views and downloads for an arbitrary list of items with an optional date range. Accepts `limit`, `page`, `dateFrom`, and `dateTo` parameters².
+  - GET `/item/id` — return views and downloads for a single item (`id` must be a UUID). Returns HTTP 404 if an item id is not found.
 
-The item id is the *internal* id for an item. You can get these from the standard DSpace REST API.
+The item id is the *internal* UUID for an item. You can get these from the standard DSpace REST API.
 
 ¹ We are querying the Solr statistics core, which technically only knows about items that have either views or downloads. If an item is not present here you can assume it has zero views and zero downloads, but not necessarily that it does not exist in the repository.
 
-## Todo
+² POST requests to `/items` should be in JSON format with the following parameters:
+
+```
+{
+    "limit": 100, // optional, integer between 0 and 100, default 100
+    "page": 0, // optional, integer greater than 0, default 0
+    "dateFrom": "2020-01-01T00:00:00Z", // optional, default *
+    "dateTo": "2020-09-09T00:00:00Z", // optional, default *
+    "items": [
+        "f44cf173-2344-4eb2-8f00-ee55df32c76f",
+        "2324aa41-e9de-4a2b-bc36-16241464683e",
+        "8542f9da-9ce1-4614-abf4-f2e3fdb4b305",
+        "0fe573e7-042a-4240-a4d9-753b61233908"
+    ]
+}
+```
+
+## TODO
 
 - Better logging
-- Tests
-- Check if database exists (try/except)
-- Version API
+- Version API (or at least include a /version endpoint?)
+  - Probably use /status with a version in the response
 - Use JSON in PostgreSQL
-- Switch to [Python 3.6+ f-string syntax](https://realpython.com/python-f-strings/)
+- Add top items endpoint, perhaps `/top/items` or `/items/top`?
+  - Actually we could add `/items?limit=10&sort=views`
+- Make community and collection stats available
+  - Facet on owningComm and owningColl
+- Add Swagger with OpenAPI 3.0.x with [falcon-swagger-ui](https://github.com/rdidyk/falcon-swagger-ui)
 
 ## License
 This work is licensed under the [GPLv3](https://www.gnu.org/licenses/gpl-3.0.en.html).
+
+The license allows you to use and modify the work for personal and commercial purposes, but if you distribute the work you must provide users with a means to access the source code for the version you are distributing. Read more about the [GPLv3 at TL;DR Legal](https://tldrlegal.com/license/gnu-general-public-license-v3-(gpl-3)).

dspace_statistics_api/app.py

@@ -1,12 +1,16 @@
-from .database import DatabaseManager
 import falcon
+import psycopg2.extras
+
+from .database import DatabaseManager
+from .items import get_downloads, get_views
+from .util import validate_items_post_parameters
 
 
 class RootResource:
     def on_get(self, req, resp):
         resp.status = falcon.HTTP_200
-        resp.content_type = 'text/html'
-        with open('dspace_statistics_api/docs/index.html', 'r') as f:
+        resp.content_type = "text/html"
+        with open("dspace_statistics_api/docs/index.html", "r") as f:
             resp.body = f.read()
 
 
@@ -14,8 +18,8 @@ class AllItemsResource:
     def on_get(self, req, resp):
         """Handles GET requests"""
         # Return HTTPBadRequest if id parameter is not present and valid
-        limit = req.get_param_as_int("limit", min=0, max=100) or 100
-        page = req.get_param_as_int("page", min=0) or 0
+        limit = req.get_param_as_int("limit", min_value=1, max_value=100) or 100
+        page = req.get_param_as_int("page", min_value=0) or 0
         offset = limit * page
 
         with DatabaseManager() as db:
@@ -23,59 +27,132 @@ class AllItemsResource:
 
             with db.cursor() as cursor:
                 # get total number of items so we can estimate the pages
-                cursor.execute('SELECT COUNT(id) FROM items')
+                cursor.execute("SELECT COUNT(id) FROM items")
                 pages = round(cursor.fetchone()[0] / limit)
 
-                # get statistics, ordered by id, and use limit and offset to page through results
-                cursor.execute('SELECT id, views, downloads FROM items ORDER BY id ASC LIMIT {} OFFSET {}'.format(limit, offset))
+                # get statistics and use limit and offset to page through results
+                cursor.execute(
+                    "SELECT id, views, downloads FROM items ORDER BY id LIMIT %s OFFSET %s",
+                    [limit, offset],
+                )
 
                 # create a list to hold dicts of item stats
                 statistics = list()
 
                 # iterate over results and build statistics object
                 for item in cursor:
-                    statistics.append({'id': item['id'], 'views': item['views'], 'downloads': item['downloads']})
+                    statistics.append(
+                        {
+                            "id": str(item["id"]),
+                            "views": item["views"],
+                            "downloads": item["downloads"],
+                        }
+                    )
 
         message = {
-            'currentPage': page,
-            'totalPages': pages,
-            'limit': limit,
-            'statistics': statistics
+            "currentPage": page,
+            "totalPages": pages,
+            "limit": limit,
+            "statistics": statistics,
         }
 
         resp.media = message
 
+    @falcon.before(validate_items_post_parameters)
+    def on_post(self, req, resp):
+        """Handles POST requests"""
+
+        # Build the Solr date string, ie: [* TO *]
+        if req.context.dateFrom and req.context.dateTo:
+            solr_date_string = f"[{req.context.dateFrom} TO {req.context.dateTo}]"
+        elif not req.context.dateFrom and req.context.dateTo:
+            solr_date_string = f"[* TO {req.context.dateTo}]"
+        elif req.context.dateFrom and not req.context.dateTo:
+            solr_date_string = f"[{req.context.dateFrom} TO *]"
+        else:
+            solr_date_string = "[* TO *]"
+
+        # Helper variables to make working with pages/items/results easier and
+        # to make the code easier to understand
+        number_of_items: int = len(req.context.items)
+        pages: int = int(number_of_items / req.context.limit)
+        first_item: int = req.context.page * req.context.limit
+        last_item: int = first_item + req.context.limit
+        # Get a subset of the POSTed items based on our limit. Note that Python
+        # list slicing and indexing are both zero based, but the first and last
+        # items in a slice can be confusing. See this ASCII diagram:
+        #
+        #                 +---+---+---+---+---+---+
+        #                 | P | y | t | h | o | n |
+        #                 +---+---+---+---+---+---+
+        # Slice position: 0   1   2   3   4   5   6
+        # Index position:   0   1   2   3   4   5
+        #
+        # So if we have a list items with 240 items:
+        #
+        #   1st set: items[0:100] would give items at indexes 0 to 99
+        #   2nd set: items[100:200] would give items at indexes 100 to 199
+        #   3rd set: items[200:300] would give items at indexes 200 to 239
+        items_subset: list = req.context.items[first_item:last_item]
+
+        views: dict = get_views(solr_date_string, items_subset)
+        downloads: dict = get_downloads(solr_date_string, items_subset)
+
+        # create a list to hold dicts of item stats
+        statistics = list()
+
+        # iterate over views dict to extract views and use the item id as an
+        # index to the downloads dict to extract downloads.
+        for k, v in views.items():
+            statistics.append({"id": k, "views": v, "downloads": downloads[k]})
+
+        message = {
+            "currentPage": req.context.page,
+            "totalPages": pages,
+            "limit": req.context.limit,
+            "statistics": statistics,
+        }
+
+        resp.status = falcon.HTTP_200
+        resp.media = message
+
 
 class ItemResource:
     def on_get(self, req, resp, item_id):
         """Handles GET requests"""
 
+        # Adapt Python’s uuid.UUID type to PostgreSQL’s uuid
+        # See: https://www.psycopg.org/docs/extras.html
+        psycopg2.extras.register_uuid()
+
         with DatabaseManager() as db:
             db.set_session(readonly=True)
 
             with db.cursor() as cursor:
                 cursor = db.cursor()
-                cursor.execute('SELECT views, downloads FROM items WHERE id={}'.format(item_id))
+                cursor.execute(
+                    "SELECT views, downloads FROM items WHERE id=%s", [str(item_id)]
+                )
                 if cursor.rowcount == 0:
                     raise falcon.HTTPNotFound(
-                        title='Item not found',
-                        description='The item with id "{}" was not found.'.format(item_id)
+                        title="Item not found",
+                        description=f'The item with id "{str(item_id)}" was not found.',
                     )
                 else:
                     results = cursor.fetchone()
 
                     statistics = {
-                        'id': item_id,
-                        'views': results['views'],
-                        'downloads': results['downloads']
+                        "id": str(item_id),
+                        "views": results["views"],
+                        "downloads": results["downloads"],
                     }
 
                     resp.media = statistics
 
 
 api = application = falcon.API()
-api.add_route('/', RootResource())
-api.add_route('/items', AllItemsResource())
-api.add_route('/item/{item_id:int}', ItemResource())
+api.add_route("/", RootResource())
+api.add_route("/items", AllItemsResource())
+api.add_route("/item/{item_id:uuid}", ItemResource())
 
 # vim: set sw=4 ts=4 expandtab:

dspace_statistics_api/config.py

@@ -1,12 +1,12 @@
 import os
 
 # Check if Solr connection information was provided in the environment
-SOLR_SERVER = os.environ.get('SOLR_SERVER', 'http://localhost:8080/solr')
+SOLR_SERVER = os.environ.get("SOLR_SERVER", "http://localhost:8080/solr")
 
-DATABASE_NAME = os.environ.get('DATABASE_NAME', 'dspacestatistics')
-DATABASE_USER = os.environ.get('DATABASE_USER', 'dspacestatistics')
-DATABASE_PASS = os.environ.get('DATABASE_PASS', 'dspacestatistics')
-DATABASE_HOST = os.environ.get('DATABASE_HOST', 'localhost')
-DATABASE_PORT = os.environ.get('DATABASE_PORT', '5432')
+DATABASE_NAME = os.environ.get("DATABASE_NAME", "dspacestatistics")
+DATABASE_USER = os.environ.get("DATABASE_USER", "dspacestatistics")
+DATABASE_PASS = os.environ.get("DATABASE_PASS", "dspacestatistics")
+DATABASE_HOST = os.environ.get("DATABASE_HOST", "localhost")
+DATABASE_PORT = os.environ.get("DATABASE_PORT", "5432")
 
 # vim: set sw=4 ts=4 expandtab:

dspace_statistics_api/database.py

@@ -1,23 +1,36 @@
-from .config import DATABASE_NAME
-from .config import DATABASE_USER
-from .config import DATABASE_PASS
-from .config import DATABASE_HOST
-from .config import DATABASE_PORT
+import falcon
 import psycopg2
 import psycopg2.extras
 
+from .config import (
+    DATABASE_HOST,
+    DATABASE_NAME,
+    DATABASE_PASS,
+    DATABASE_PORT,
+    DATABASE_USER,
+)
 
-class DatabaseManager():
-    '''Manage database connection.'''
+
+class DatabaseManager:
+    """Manage database connection."""
 
     def __init__(self):
-        self._connection_uri = 'dbname={} user={} password={} host={} port={}'.format(DATABASE_NAME, DATABASE_USER, DATABASE_PASS, DATABASE_HOST, DATABASE_PORT)
+        self._connection_uri = f"dbname={DATABASE_NAME} user={DATABASE_USER} password={DATABASE_PASS} host={DATABASE_HOST} port={DATABASE_PORT}"
 
     def __enter__(self):
-        self._connection = psycopg2.connect(self._connection_uri, cursor_factory=psycopg2.extras.DictCursor)
+        try:
+            self._connection = psycopg2.connect(
+                self._connection_uri, cursor_factory=psycopg2.extras.DictCursor
+            )
+        except psycopg2.OperationalError:
+            title = "500 Internal Server Error"
+            description = "Could not connect to database"
+            raise falcon.HTTPInternalServerError(title, description)
+
         return self._connection
 
     def __exit__(self, exc_type, exc_value, exc_traceback):
         self._connection.close()
 
+
 # vim: set sw=4 ts=4 expandtab:

dspace_statistics_api/docs/index.html

@@ -5,16 +5,33 @@
         <title>DSpace Statistics API</title>
     </head>
     <body>
-        <h1>DSpace Statistics API</h1>
+        <h1>DSpace Statistics API v1.3.2</h1>
         <p>This site is running the <a href="https://github.com/ilri/dspace-statistics-api" title="DSpace Statistics API project">DSpace Statistics API</a>. The following endpoints are available:</p>
         <ul>
             <li>GET <code>/</code> — return a basic API documentation page.</li>
             <li>GET <code>/items</code> — return views and downloads for all items that Solr knows about¹. Accepts <code>limit</code> and <code>page</code> query parameters for pagination of results (<code>limit</code> must be an integer between 1 and 100, and <code>page</code> must be an integer greater than or equal to 0).</li>
-            <li>GET <code>/item/id</code> — return views and downloads for a single item (<code>id</code> must be a positive integer). Returns HTTP 404 if an item id is not found.</li>
+            <li>POST <code>/items</code> — return views and downloads for an arbitrary list of items with an optional date range. Accepts <code>limit</code>, <code>page</code>, <code>dateFrom</code>, and <code>dateTo</code> parameters².</li>
+            <li>GET <code>/item/id</code> — return views and downloads for a single item (<code>id</code> must be a UUID). Returns HTTP 404 if an item id is not found.</li>
         </ul>
 
-        <p>The item id is the <em>internal</em> id for an item. You can get these from the standard DSpace REST API.</p>
+        <p>The item id is the <em>internal</em> uuid for an item. You can get these from the standard DSpace REST API.</p>
 
-        <p>¹ We are querying the Solr statistics core, which technically only knows about items that have either views or downloads. If an item is not present here you can assume it has zero views and zero downloads, but not necessarily that it does not exist in the repository.</code>
+        <hr/>
+
+        <p>¹ We are querying the Solr statistics core, which technically only knows about items that have either views or downloads. If an item is not present here you can assume it has zero views and zero downloads, but not necessarily that it does not exist in the repository.</p>
+        <p>² POST requests to <code>/items</code> should be in JSON format with the following parameters:
+			<pre><code>{
+	"limit": 100, // optional, integer between 1 and 100, default 100
+	"page": 0, // optional, integer greater than 0, default 0
+	"dateFrom": "2020-01-01T00:00:00Z", // optional, default *
+	"dateTo": "2020-09-09T00:00:00Z", // optional, default *
+	"items": [
+		"f44cf173-2344-4eb2-8f00-ee55df32c76f",
+		"2324aa41-e9de-4a2b-bc36-16241464683e",
+		"8542f9da-9ce1-4614-abf4-f2e3fdb4b305",
+		"0fe573e7-042a-4240-a4d9-753b61233908"
+	]
+}</code></pre>
+        </p>
     </body>
 </html>

dspace_statistics_api/indexer.py

@@ -21,42 +21,59 @@
 # Connects to a DSpace Solr statistics core and ingests item views and downloads
 # into a PostgreSQL database for use by other applications (like an API).
 #
-# This script is written for Python 3.5+ and requires several modules that you
+# This script is written for Python 3.6+ and requires several modules that you
 # can install with pip (I recommend using a Python virtual environment):
 #
-#   $ pip install SolrClient psycopg2-binary
+#   $ pip install psycopg2-binary
 #
-# See: https://solrclient.readthedocs.io/en/latest/SolrClient.html
 # See: https://wiki.duraspace.org/display/DSPACE/Solr
 
-from .database import DatabaseManager
-import json
 import psycopg2.extras
-from .solr import solr_connection
+import requests
+
+from .config import SOLR_SERVER
+from .database import DatabaseManager
+from .util import get_statistics_shards
 
 
 def index_views():
     # get total number of distinct facets for items with a minimum of 1 view,
     # otherwise Solr returns all kinds of weird ids that are actually not in
     # the database. Also, stats are expensive, but we need stats.calcdistinct
-    # so we can get the countDistinct summary.
+    # so we can get the countDistinct summary to calculate how many pages of
+    # results we have.
     #
     # see: https://lucene.apache.org/solr/guide/6_6/the-stats-component.html
-    res = solr.query('statistics', {
-        'q': 'type:2',
-        'fq': 'isBot:false AND statistics_type:view',
-        'facet': True,
-        'facet.field': 'id',
-        'facet.mincount': 1,
-        'facet.limit': 1,
-        'facet.offset': 0,
-        'stats': True,
-        'stats.field': 'id',
-        'stats.calcdistinct': True
-    }, rows=0)
+    solr_query_params = {
+        "q": "type:2",
+        "fq": "-isBot:true AND statistics_type:view",
+        "fl": "id",
+        "facet": "true",
+        "facet.field": "id",
+        "facet.mincount": 1,
+        "facet.limit": 1,
+        "facet.offset": 0,
+        "stats": "true",
+        "stats.field": "id",
+        "stats.calcdistinct": "true",
+        "shards": shards,
+        "rows": 0,
+        "wt": "json",
+    }
 
-    # get total number of distinct facets (countDistinct)
-    results_totalNumFacets = json.loads(res.get_json())['stats']['stats_fields']['id']['countDistinct']
+    solr_url = SOLR_SERVER + "/statistics/select"
+
+    res = requests.get(solr_url, params=solr_query_params)
+
+    try:
+        # get total number of distinct facets (countDistinct)
+        results_totalNumFacets = res.json()["stats"]["stats_fields"]["id"][
+            "countDistinct"
+        ]
+    except TypeError:
+        print("No item views to index, exiting.")
+
+        exit(0)
 
     # divide results into "pages" (cast to int to effectively round down)
     results_per_page = 100
@@ -69,27 +86,37 @@ def index_views():
             data = []
 
             while results_current_page <= results_num_pages:
-                print('Indexing item views (page {} of {})'.format(results_current_page, results_num_pages))
+                # "pages" are zero based, but one based is more human readable
+                print(
+                    f"Indexing item views (page {results_current_page + 1} of {results_num_pages + 1})"
+                )
 
-                res = solr.query('statistics', {
-                    'q': 'type:2',
-                    'fq': 'isBot:false AND statistics_type:view',
-                    'facet': True,
-                    'facet.field': 'id',
-                    'facet.mincount': 1,
-                    'facet.limit': results_per_page,
-                    'facet.offset': results_current_page * results_per_page
-                }, rows=0)
+                solr_query_params = {
+                    "q": "type:2",
+                    "fq": "-isBot:true AND statistics_type:view",
+                    "fl": "id",
+                    "facet": "true",
+                    "facet.field": "id",
+                    "facet.mincount": 1,
+                    "facet.limit": results_per_page,
+                    "facet.offset": results_current_page * results_per_page,
+                    "shards": shards,
+                    "rows": 0,
+                    "wt": "json",
+                    "json.nl": "map",  # return facets as a dict instead of a flat list
+                }
 
-                # SolrClient's get_facets() returns a dict of dicts
-                views = res.get_facets()
-                # in this case iterate over the 'id' dict and get the item ids and views
-                for item_id, item_views in views['id'].items():
+                res = requests.get(solr_url, params=solr_query_params)
+
+                # Solr returns facets as a dict of dicts (see json.nl parameter)
+                views = res.json()["facet_counts"]["facet_fields"]
+                # iterate over the 'id' dict and get the item ids and views
+                for item_id, item_views in views["id"].items():
                     data.append((item_id, item_views))
 
                 # do a batch insert of values from the current "page" of results
-                sql = 'INSERT INTO items(id, views) VALUES %s ON CONFLICT(id) DO UPDATE SET views=excluded.views'
-                psycopg2.extras.execute_values(cursor, sql, data, template='(%s, %s)')
+                sql = "INSERT INTO items(id, views) VALUES %s ON CONFLICT(id) DO UPDATE SET views=excluded.views"
+                psycopg2.extras.execute_values(cursor, sql, data, template="(%s, %s)")
                 db.commit()
 
                 # clear all items from the list so we can populate it with the next batch
@@ -100,21 +127,36 @@ def index_views():
 
 def index_downloads():
     # get the total number of distinct facets for items with at least 1 download
-    res = solr.query('statistics', {
-        'q': 'type:0',
-        'fq': 'isBot:false AND statistics_type:view AND bundleName:ORIGINAL',
-        'facet': True,
-        'facet.field': 'owningItem',
-        'facet.mincount': 1,
-        'facet.limit': 1,
-        'facet.offset': 0,
-        'stats': True,
-        'stats.field': 'owningItem',
-        'stats.calcdistinct': True
-    }, rows=0)
+    solr_query_params = {
+        "q": "type:0",
+        "fq": "-isBot:true AND statistics_type:view AND bundleName:ORIGINAL",
+        "fl": "owningItem",
+        "facet": "true",
+        "facet.field": "owningItem",
+        "facet.mincount": 1,
+        "facet.limit": 1,
+        "facet.offset": 0,
+        "stats": "true",
+        "stats.field": "owningItem",
+        "stats.calcdistinct": "true",
+        "shards": shards,
+        "rows": 0,
+        "wt": "json",
+    }
 
-    # get total number of distinct facets (countDistinct)
-    results_totalNumFacets = json.loads(res.get_json())['stats']['stats_fields']['owningItem']['countDistinct']
+    solr_url = SOLR_SERVER + "/statistics/select"
+
+    res = requests.get(solr_url, params=solr_query_params)
+
+    try:
+        # get total number of distinct facets (countDistinct)
+        results_totalNumFacets = res.json()["stats"]["stats_fields"]["owningItem"][
+            "countDistinct"
+        ]
+    except TypeError:
+        print("No item downloads to index, exiting.")
+
+        exit(0)
 
     # divide results into "pages" (cast to int to effectively round down)
     results_per_page = 100
@@ -127,27 +169,37 @@ def index_downloads():
             data = []
 
             while results_current_page <= results_num_pages:
-                print('Indexing item downloads (page {} of {})'.format(results_current_page, results_num_pages))
+                # "pages" are zero based, but one based is more human readable
+                print(
+                    f"Indexing item downloads (page {results_current_page + 1} of {results_num_pages + 1})"
+                )
 
-                res = solr.query('statistics', {
-                    'q': 'type:0',
-                    'fq': 'isBot:false AND statistics_type:view AND bundleName:ORIGINAL',
-                    'facet': True,
-                    'facet.field': 'owningItem',
-                    'facet.mincount': 1,
-                    'facet.limit': results_per_page,
-                    'facet.offset': results_current_page * results_per_page
-                }, rows=0)
+                solr_query_params = {
+                    "q": "type:0",
+                    "fq": "-isBot:true AND statistics_type:view AND bundleName:ORIGINAL",
+                    "fl": "owningItem",
+                    "facet": "true",
+                    "facet.field": "owningItem",
+                    "facet.mincount": 1,
+                    "facet.limit": results_per_page,
+                    "facet.offset": results_current_page * results_per_page,
+                    "shards": shards,
+                    "rows": 0,
+                    "wt": "json",
+                    "json.nl": "map",  # return facets as a dict instead of a flat list
+                }
 
-                # SolrClient's get_facets() returns a dict of dicts
-                downloads = res.get_facets()
-                # in this case iterate over the 'owningItem' dict and get the item ids and downloads
-                for item_id, item_downloads in downloads['owningItem'].items():
+                res = requests.get(solr_url, params=solr_query_params)
+
+                # Solr returns facets as a dict of dicts (see json.nl parameter)
+                downloads = res.json()["facet_counts"]["facet_fields"]
+                # iterate over the 'owningItem' dict and get the item ids and downloads
+                for item_id, item_downloads in downloads["owningItem"].items():
                     data.append((item_id, item_downloads))
 
                 # do a batch insert of values from the current "page" of results
-                sql = 'INSERT INTO items(id, downloads) VALUES %s ON CONFLICT(id) DO UPDATE SET downloads=excluded.downloads'
-                psycopg2.extras.execute_values(cursor, sql, data, template='(%s, %s)')
+                sql = "INSERT INTO items(id, downloads) VALUES %s ON CONFLICT(id) DO UPDATE SET downloads=excluded.downloads"
+                psycopg2.extras.execute_values(cursor, sql, data, template="(%s, %s)")
                 db.commit()
 
                 # clear all items from the list so we can populate it with the next batch
@@ -156,17 +208,19 @@ def index_downloads():
                 results_current_page += 1
 
 
-solr = solr_connection()
-
 with DatabaseManager() as db:
     with db.cursor() as cursor:
         # create table to store item views and downloads
-        cursor.execute('''CREATE TABLE IF NOT EXISTS items
-                  (id INT PRIMARY KEY, views INT DEFAULT 0, downloads INT DEFAULT 0)''')
+        cursor.execute(
+            """CREATE TABLE IF NOT EXISTS items
+                  (id UUID PRIMARY KEY, views INT DEFAULT 0, downloads INT DEFAULT 0)"""
+        )
 
     # commit the table creation before closing the database connection
     db.commit()
 
+shards = get_statistics_shards()
+
 index_views()
 index_downloads()
 

dspace_statistics_api/items.py

@@ -0,0 +1,107 @@
+import requests
+
+from .config import SOLR_SERVER
+from .util import get_statistics_shards
+
+
+def get_views(solr_date_string: str, items: list):
+    """
+    Get view statistics for a list of items from Solr.
+
+    :parameter solr_date_string (str): Solr date string, for example "[* TO *]"
+    :parameter items (list): a list of item IDs
+    :returns: A dict of item IDs and views
+    """
+    shards = get_statistics_shards()
+
+    # Join the UUIDs with "OR" and escape the hyphens for Solr
+    solr_items_string: str = " OR ".join(items).replace("-", r"\-")
+
+    solr_query_params = {
+        "q": f"id:({solr_items_string})",
+        "fq": f"type:2 AND isBot:false AND statistics_type:view AND time:{solr_date_string}",
+        "fl": "id",
+        "facet": "true",
+        "facet.field": "id",
+        "facet.mincount": 1,
+        "shards": shards,
+        "rows": 0,
+        "wt": "json",
+        "json.nl": "map",  # return facets as a dict instead of a flat list
+    }
+
+    solr_url = SOLR_SERVER + "/statistics/select"
+    res = requests.get(solr_url, params=solr_query_params)
+
+    # Create an empty dict to store views
+    data = {}
+
+    # Solr returns facets as a dict of dicts (see the json.nl parameter)
+    views = res.json()["facet_counts"]["facet_fields"]
+    # iterate over the 'id' dict and get the item ids and views
+    for item_id, item_views in views["id"].items():
+        data[item_id] = item_views
+
+    # Check if any items have missing stats so we can set them to 0
+    if len(data) < len(items):
+        # List comprehension to get a list of item ids (keys) in the data
+        data_ids = [k for k, v in data.items()]
+        for item_id in items:
+            if item_id not in data_ids:
+                data[item_id] = 0
+                continue
+
+    return data
+
+
+def get_downloads(solr_date_string: str, items: list):
+    """
+    Get download statistics for a list of items from Solr.
+
+    :parameter solr_date_string (str): Solr date string, for example "[* TO *]"
+    :parameter items (list): a list of item IDs
+    :returns: A dict of item IDs and downloads
+    """
+    shards = get_statistics_shards()
+
+    # Join the UUIDs with "OR" and escape the hyphens for Solr
+    solr_items_string: str = " OR ".join(items).replace("-", r"\-")
+
+    solr_query_params = {
+        "q": f"owningItem:({solr_items_string})",
+        "fq": f"type:0 AND isBot:false AND statistics_type:view AND bundleName:ORIGINAL AND time:{solr_date_string}",
+        "fl": "owningItem",
+        "facet": "true",
+        "facet.field": "owningItem",
+        "facet.mincount": 1,
+        "shards": shards,
+        "rows": 0,
+        "wt": "json",
+        "json.nl": "map",  # return facets as a dict instead of a flat list
+    }
+
+    solr_url = SOLR_SERVER + "/statistics/select"
+    res = requests.get(solr_url, params=solr_query_params)
+
+    # Create an empty dict to store downloads
+    data = {}
+
+    # Solr returns facets as a dict of dicts (see the json.nl parameter)
+    downloads = res.json()["facet_counts"]["facet_fields"]
+    # Iterate over the 'owningItem' dict and get the item ids and downloads
+    for item_id, item_downloads in downloads["owningItem"].items():
+        data[item_id] = item_downloads
+
+    # Check if any items have missing stats so we can set them to 0
+    if len(data) < len(items):
+        # List comprehension to get a list of item ids (keys) in the data
+        data_ids = [k for k, v in data.items()]
+        for item_id in items:
+            if item_id not in data_ids:
+                data[item_id] = 0
+                continue
+
+    return data
+
+
+# vim: set sw=4 ts=4 expandtab:

dspace_statistics_api/solr.py

@@ -1,10 +0,0 @@
-from .config import SOLR_SERVER
-from SolrClient import SolrClient
-
-
-def solr_connection():
-    connection = SolrClient(SOLR_SERVER)
-
-    return connection
-
-# vim: set sw=4 ts=4 expandtab:

dspace_statistics_api/util.py

@@ -0,0 +1,138 @@
+import datetime
+import json
+import re
+
+import falcon
+import requests
+
+from .config import SOLR_SERVER
+
+
+def get_statistics_shards():
+    """Enumerate the cores in Solr to determine if statistics have been sharded into
+    yearly shards by DSpace's stats-util or not (for example: statistics-2018).
+
+    Returns:
+        str:A list of Solr statistics shards separated by commas.
+    """
+
+    # Initialize an empty list for statistics core years
+    statistics_core_years = []
+
+    # URL for Solr status to check active cores
+    solr_query_params = {"action": "STATUS", "wt": "json"}
+    solr_url = SOLR_SERVER + "/admin/cores"
+    res = requests.get(solr_url, params=solr_query_params)
+
+    if res.status_code == requests.codes.ok:
+        data = res.json()
+
+        # Iterate over active cores from Solr's STATUS response (cores are in
+        # the status array of this response).
+        for core in data["status"]:
+            # Pattern to match, for example: statistics-2018
+            pattern = re.compile("^statistics-[0-9]{4}$")
+
+            if not pattern.match(core):
+                continue
+
+            # Append current core to list
+            statistics_core_years.append(core)
+
+    # Initialize a string to hold our shards (may end up being empty if the Solr
+    # core has not been processed by stats-util).
+    shards = str()
+
+    if len(statistics_core_years) > 0:
+        # Begin building a string of shards starting with the default one
+        shards = f"{SOLR_SERVER}/statistics"
+
+        for core in statistics_core_years:
+            # Create a comma-separated list of shards to pass to our Solr query
+            #
+            # See: https://wiki.apache.org/solr/DistributedSearch
+            shards += f",{SOLR_SERVER}/{core}"
+
+    # Return the string of shards, which may actually be empty. Solr doesn't
+    # seem to mind if the shards query parameter is empty and I haven't seen
+    # any negative performance impact so this should be fine.
+    return shards
+
+
+def is_valid_date(date):
+
+    try:
+        # Solr date format is: 2020-01-01T00:00:00Z
+        # See: https://docs.python.org/3/library/datetime.html#strftime-strptime-behavior
+        datetime.datetime.strptime(date, "%Y-%m-%dT%H:%M:%SZ")
+
+        return True
+    except ValueError:
+        raise falcon.HTTPBadRequest(
+            title="Invalid parameter",
+            description=f"Invalid date format: {date}. The value must be in format: 2020-01-01T00:00:00Z.",
+        )
+
+
+def validate_items_post_parameters(req, resp, resource, params):
+    """Check the POSTed request parameters for the `/items` endpoint.
+
+    Meant to be used as a `before` hook.
+    """
+
+    # Only attempt to read the POSTed request if its length is not 0 (or
+    # rather, in the Python sense, if length is not a False-y value).
+    if req.content_length:
+        doc = json.load(req.bounded_stream)
+    else:
+        raise falcon.HTTPBadRequest(
+            title="Invalid request", description="Request body is empty."
+        )
+
+    # Parse date parameters from request body (will raise an HTTPBadRequest
+    # from is_valid_date() if any parameters are invalid)
+    if "dateFrom" in doc and is_valid_date(doc["dateFrom"]):
+        req.context.dateFrom = doc["dateFrom"]
+    else:
+        req.context.dateFrom = None
+
+    if "dateTo" in doc and is_valid_date(doc["dateTo"]):
+        req.context.dateTo = doc["dateTo"]
+    else:
+        req.context.dateTo = None
+
+    # Parse the limit parameter from the POST request body
+    if "limit" in doc:
+        if isinstance(doc["limit"], int) and 0 < doc["limit"] <= 100:
+            req.context.limit = doc["limit"]
+        else:
+            raise falcon.HTTPBadRequest(
+                title="Invalid parameter",
+                description='The "limit" parameter is invalid. The value must be an integer between 1 and 100.',
+            )
+    else:
+        req.context.limit = 100
+
+    # Parse the page parameter from the POST request body
+    if "page" in doc:
+        if isinstance(doc["page"], int) and doc["page"] >= 0:
+            req.context.page = doc["page"]
+        else:
+            raise falcon.HTTPBadRequest(
+                title="Invalid parameter",
+                description='The "page" parameter is invalid. The value must be at least 0.',
+            )
+    else:
+        req.context.page = 0
+
+    # Parse the list of items from the POST request body
+    if "items" in doc:
+        if isinstance(doc["items"], list) and len(doc["items"]) > 0:
+            req.context.items = doc["items"]
+        else:
+            raise falcon.HTTPBadRequest(
+                title="Invalid parameter",
+                description='The "items" parameter is invalid. The value must be a comma-separated list of item UUIDs.',
+            )
+    else:
+        req.context.items = list()

poetry.lock

@@ -0,0 +1,852 @@
+[[package]]
+name = "appdirs"
+version = "1.4.4"
+description = "A small Python module for determining appropriate platform-specific dirs, e.g. a \"user data dir\"."
+category = "dev"
+optional = false
+python-versions = "*"
+
+[[package]]
+name = "appnope"
+version = "0.1.2"
+description = "Disable App Nap on macOS >= 10.9"
+category = "dev"
+optional = false
+python-versions = "*"
+marker = "python_version >= \"3.7\" and python_version < \"4.0\" and sys_platform == \"darwin\""
+
+[[package]]
+name = "atomicwrites"
+version = "1.4.0"
+description = "Atomic file writes."
+category = "dev"
+optional = false
+python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
+marker = "sys_platform == \"win32\""
+
+[[package]]
+name = "attrs"
+version = "20.3.0"
+description = "Classes Without Boilerplate"
+category = "dev"
+optional = false
+python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
+
+[package.extras]
+dev = ["coverage (>=5.0.2)", "hypothesis", "pympler", "pytest (>=4.3.0)", "six", "zope.interface", "furo", "sphinx", "pre-commit"]
+docs = ["furo", "sphinx", "zope.interface"]
+tests = ["coverage (>=5.0.2)", "hypothesis", "pympler", "pytest (>=4.3.0)", "six", "zope.interface"]
+tests_no_zope = ["coverage (>=5.0.2)", "hypothesis", "pympler", "pytest (>=4.3.0)", "six"]
+
+[[package]]
+name = "backcall"
+version = "0.2.0"
+description = "Specifications for callback functions passed in to an API"
+category = "dev"
+optional = false
+python-versions = "*"
+marker = "python_version >= \"3.7\" and python_version < \"4.0\""
+
+[[package]]
+name = "black"
+version = "20.8b1"
+description = "The uncompromising code formatter."
+category = "dev"
+optional = false
+python-versions = ">=3.6"
+
+[package.extras]
+colorama = ["colorama (>=0.4.3)"]
+d = ["aiohttp (>=3.3.2)", "aiohttp-cors"]
+
+[package.dependencies]
+appdirs = "*"
+click = ">=7.1.2"
+mypy-extensions = ">=0.4.3"
+pathspec = ">=0.6,<1"
+regex = ">=2020.1.8"
+toml = ">=0.10.1"
+typed-ast = ">=1.4.0"
+typing-extensions = ">=3.7.4"
+
+[package.dependencies.dataclasses]
+version = ">=0.6"
+python = "<3.7"
+
+[[package]]
+name = "certifi"
+version = "2020.12.5"
+description = "Python package for providing Mozilla's CA Bundle."
+category = "main"
+optional = false
+python-versions = "*"
+
+[[package]]
+name = "chardet"
+version = "4.0.0"
+description = "Universal encoding detector for Python 2 and 3"
+category = "main"
+optional = false
+python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
+
+[[package]]
+name = "click"
+version = "7.1.2"
+description = "Composable command line interface toolkit"
+category = "dev"
+optional = false
+python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
+
+[[package]]
+name = "colorama"
+version = "0.4.4"
+description = "Cross-platform colored terminal text."
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pyproject.toml

@@ -0,0 +1,24 @@
+[tool.poetry]
+name = "dspace-statistics-api"
+version = "1.3.2"
+description = "A simple REST API to expose Solr view and download statistics for items in a DSpace repository."
+authors = ["Alan Orth <aorth@mjanja.ch>"]
+license = "GPL-3.0-only"
+
+[tool.poetry.dependencies]
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+gunicorn = "^20.0.4"
+falcon = "^2.0.0"
+psycopg2-binary = "^2.8.6"
+requests = "^2.24.0"
+
+[tool.poetry.dev-dependencies]
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+flake8 = "^3.8.4"
+pytest = "^6.1.1"
+isort = "^5.5.4"
+black = "^20.8b1"
+
+[build-system]
+requires = ["poetry>=0.12"]
+build-backend = "poetry.masonry.api"

pytest.ini

@@ -0,0 +1,4 @@
+[pytest]
+addopts= -rsxX -s -v --strict-markers
+filterwarnings =
+    error::UserWarning

requirements-dev.txt

@@ -0,0 +1,244 @@
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+    --hash=sha256:832aa3cde19744e49938b91fea06d69ecb9e649c93ba974535d08ad92164f700
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+    --hash=sha256:5cbdbf27be5e7cfadb448baf0aa95508f91f2bbc6c6437cd9cd06e2a4c215e1e
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+    --hash=sha256:1c02557aa099101b9d21496f8a914e9ed2222ef70336404eeeac8edba836fbea
+certifi==2020.12.5 \
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+    --hash=sha256:1a4995114262bffbc2413b159f2a1a480c969de6e6eb13ee966d470af86af59c
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+    --hash=sha256:0d6f53a15db4120f2b08c94f11e7d93d2c911ee118b6b30a04ec3ee8310179fa
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+    --hash=sha256:d2b5255c7c6349bc1bd1e59e08cd12acbbd63ce649f2588755783aa94dfb6b1a
+colorama==0.4.4; python_version >= "3.7" and python_version < "4.0" and sys_platform == "win32" or sys_platform == "win32" \
+    --hash=sha256:9f47eda37229f68eee03b24b9748937c7dc3868f906e8ba69fbcbdd3bc5dc3e2 \
+    --hash=sha256:5941b2b48a20143d2267e95b1c2a7603ce057ee39fd88e7329b0c292aa16869b
+dataclasses==0.6; python_version < "3.7" \
+    --hash=sha256:454a69d788c7fda44efd71e259be79577822f5e3f53f029a22d08004e951dc9f \
+    --hash=sha256:6988bd2b895eef432d562370bb707d540f32f7360ab13da45340101bc2307d84
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+    --hash=sha256:41fa54c2a0cc4ba648be4fd43cff00aedf5b9465c9bf18d64325bc225f08f760 \
+    --hash=sha256:e3a62f0520172440ca0dcc823749319382e377f37f140a0b99ef45fecb84bfe7
+falcon==2.0.0 \
+    --hash=sha256:733033ec80c896e30a43ab3e776856096836787197a44eb21022320a61311983 \
+    --hash=sha256:f93351459f110b4c1ee28556aef9a791832df6f910bea7b3f616109d534df06b \
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+    --hash=sha256:aa184895d1ad4573fbfaaf803563d02f019ebdf4790e41cc568a330607eae439 \
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+    --hash=sha256:54f2cb4b687035b2a03206dbfc538055cc48b59a953187b0458aa1b574d47b53 \
+    --hash=sha256:eea593cf466b9c126ce667f6d30503624ef24459f118c75594a69353b6c3d5fc
+flake8==3.8.4 \
+    --hash=sha256:749dbbd6bfd0cf1318af27bf97a14e28e5ff548ef8e5b1566ccfb25a11e7c839 \
+    --hash=sha256:aadae8761ec651813c24be05c6f7b4680857ef6afaae4651a4eccaef97ce6c3b
+gunicorn==20.0.4 \
+    --hash=sha256:cd4a810dd51bf497552cf3f863b575dabd73d6ad6a91075b65936b151cbf4f9c \
+    --hash=sha256:1904bb2b8a43658807108d59c3f3d56c2b6121a701161de0ddf9ad140073c626
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+    --hash=sha256:b97d804b1e9b523befed77c48dacec60e6dcb0b5391d57af6a65a312a90648c0 \
+    --hash=sha256:b307872f855b18632ce0c21c5e45be78c0ea7ae4c15c828c20788b26921eb3f6
+importlib-metadata==3.3.0; python_version < "3.8" \
+    --hash=sha256:bf792d480abbd5eda85794e4afb09dd538393f7d6e6ffef6e9f03d2014cf9450 \
+    --hash=sha256:5c5a2720817414a6c41f0a49993908068243ae02c1635a228126519b509c8aed
+iniconfig==1.1.1 \
+    --hash=sha256:011e24c64b7f47f6ebd835bb12a743f2fbe9a26d4cecaa7f53bc4f35ee9da8b3 \
+    --hash=sha256:bc3af051d7d14b2ee5ef9969666def0cd1a000e121eaea580d4a313df4b37f32
+ipython==7.19.0; python_version >= "3.7" and python_version < "4.0" \
+    --hash=sha256:c987e8178ced651532b3b1ff9965925bfd445c279239697052561a9ab806d28f \
+    --hash=sha256:cbb2ef3d5961d44e6a963b9817d4ea4e1fa2eb589c371a470fed14d8d40cbd6a
+ipython-genutils==0.2.0; python_version >= "3.7" and python_version < "4.0" \
+    --hash=sha256:72dd37233799e619666c9f639a9da83c34013a73e8bbc79a7a6348d93c61fab8 \
+    --hash=sha256:eb2e116e75ecef9d4d228fdc66af54269afa26ab4463042e33785b887c628ba8
+isort==5.6.4 \
+    --hash=sha256:dcab1d98b469a12a1a624ead220584391648790275560e1a43e54c5dceae65e7 \
+    --hash=sha256:dcaeec1b5f0eca77faea2a35ab790b4f3680ff75590bfcb7145986905aab2f58
+jedi==0.17.2; python_version >= "3.7" and python_version < "4.0" \
+    --hash=sha256:98cc583fa0f2f8304968199b01b6b4b94f469a1f4a74c1560506ca2a211378b5 \
+    --hash=sha256:86ed7d9b750603e4ba582ea8edc678657fb4007894a12bcf6f4bb97892f31d20
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+    --hash=sha256:ab8a6258860da4b6677da4bd2fe5dc2c659cff31b3ee4f7f5d64e79735b80d42 \
+    --hash=sha256:dd8d182285a0fe56bace7f45b5e7d1a6ebcbf524e8f3bd87eb0f125271b8831f
+mypy-extensions==0.4.3 \
+    --hash=sha256:090fedd75945a69ae91ce1303b5824f428daf5a028d2f6ab8a299250a846f15d \
+    --hash=sha256:2d82818f5bb3e369420cb3c4060a7970edba416647068eb4c5343488a6c604a8
+packaging==20.8 \
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+    --hash=sha256:78598185a7008a470d64526a8059de9aaa449238f280fc9eb6b13ba6c4109093
+parso==0.7.1; python_version >= "3.7" and python_version < "4.0" \
+    --hash=sha256:97218d9159b2520ff45eb78028ba8b50d2bc61dcc062a9682666f2dc4bd331ea \
+    --hash=sha256:caba44724b994a8a5e086460bb212abc5a8bc46951bf4a9a1210745953622eb9
+pathspec==0.8.1 \
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+    --hash=sha256:86379d6b86d75816baba717e64b1a3a3469deb93bb76d613c9ce79edc5cb68fd
+pexpect==4.8.0; python_version >= "3.7" and python_version < "4.0" and sys_platform != "win32" \
+    --hash=sha256:0b48a55dcb3c05f3329815901ea4fc1537514d6ba867a152b581d69ae3710937 \
+    --hash=sha256:fc65a43959d153d0114afe13997d439c22823a27cefceb5ff35c2178c6784c0c
+pickleshare==0.7.5; python_version >= "3.7" and python_version < "4.0" \
+    --hash=sha256:9649af414d74d4df115d5d718f82acb59c9d418196b7b4290ed47a12ce62df56 \
+    --hash=sha256:87683d47965c1da65cdacaf31c8441d12b8044cdec9aca500cd78fc2c683afca
+pluggy==0.13.1 \
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+    --hash=sha256:15b2acde666561e1298d71b523007ed7364de07029219b604cf808bfa1c765b0
+prompt-toolkit==3.0.8; python_version >= "3.7" and python_version < "4.0" \
+    --hash=sha256:7debb9a521e0b1ee7d2fe96ee4bd60ef03c6492784de0547337ca4433e46aa63 \
+    --hash=sha256:25c95d2ac813909f813c93fde734b6e44406d1477a9faef7c915ff37d39c0a8c
+psycopg2-binary==2.8.6 \
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+    --hash=sha256:d14b140a4439d816e3b1229a4a525df917d6ea22a0771a2a78332273fd9528a4 \
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+    --hash=sha256:7312e931b90fe14f925729cde58022f5d034241918a5c4f9797cac62f6b3a9dd
+ptyprocess==0.6.0; python_version >= "3.7" and python_version < "4.0" and sys_platform != "win32" \
+    --hash=sha256:d7cc528d76e76342423ca640335bd3633420dc1366f258cb31d05e865ef5ca1f \
+    --hash=sha256:923f299cc5ad920c68f2bc0bc98b75b9f838b93b599941a6b63ddbc2476394c0
+py==1.10.0 \
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+    --hash=sha256:21b81bda15b66ef5e1a777a21c4dcd9c20ad3efd0b3f817e7a809035269e1bd3
+pycodestyle==2.6.0 \
+    --hash=sha256:2295e7b2f6b5bd100585ebcb1f616591b652db8a741695b3d8f5d28bdc934367 \
+    --hash=sha256:c58a7d2815e0e8d7972bf1803331fb0152f867bd89adf8a01dfd55085434192e
+pyflakes==2.2.0 \
+    --hash=sha256:0d94e0e05a19e57a99444b6ddcf9a6eb2e5c68d3ca1e98e90707af8152c90a92 \
+    --hash=sha256:35b2d75ee967ea93b55750aa9edbbf72813e06a66ba54438df2cfac9e3c27fc8
+pygments==2.7.3; python_version >= "3.7" and python_version < "4.0" \
+    --hash=sha256:f275b6c0909e5dafd2d6269a656aa90fa58ebf4a74f8fcf9053195d226b24a08 \
+    --hash=sha256:ccf3acacf3782cbed4a989426012f1c535c9a90d3a7fc3f16d231b9372d2b716
+pyparsing==2.4.7 \
+    --hash=sha256:ef9d7589ef3c200abe66653d3f1ab1033c3c419ae9b9bdb1240a85b024efc88b \
+    --hash=sha256:c203ec8783bf771a155b207279b9bccb8dea02d8f0c9e5f8ead507bc3246ecc1
+pytest==6.2.1 \
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+    --hash=sha256:66e419b1899bc27346cb2c993e12c5e5e8daba9073c1fbce33b9807abc95c306
+regex==2020.11.13 \
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+    --hash=sha256:a63f1a07932c9686d2d416fb295ec2c01ab246e89b4d58e5fa468089cab44b70 \
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+    --hash=sha256:83d6b356e116ca119db8e7c6fc2983289d87b27b3fac238cfe5dca529d884562
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+    --hash=sha256:27973dd4a904a4f13b263a19c866c13b92a39ed1c964655f025f3f8d3d75b804
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+    --hash=sha256:806143ae5bfb6a3c6e736a764057db0e6a0e05e338b5630894a5f779cabb4f9b \
+    --hash=sha256:b3bda1d108d5dd99f4a20d24d9c348e91c4db7ab1b749200bded2f839ccbe68f
+traitlets==5.0.5; python_version >= "3.7" and python_version < "4.0" \
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+    --hash=sha256:178f4ce988f69189f7e523337a3e11d91c786ded9360174a3d9ca83e79bc5396
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+    --hash=sha256:8c8aaad94455178e3187ab22c8b01a3837f8ee50e09cf31f1ba129eb293ec30b
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+    --hash=sha256:dafc7639cde7f1b6e1acc0f457842a83e722ccca8eef5270af2d74792619a89f \
+    --hash=sha256:7cb407020f00f7bfc3cb3e7881628838e69d8f3fcab2f64742a5e76b2f841918 \
+    --hash=sha256:99d4073b617d30288f569d3f13d2bd7548c3a7e4c8de87db09a9d29bb3a4a60c
+urllib3==1.26.2 \
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+    --hash=sha256:19188f96923873c92ccb987120ec4acaa12f0461fa9ce5d3d0772bc965a39e08
+wcwidth==0.2.5; python_version >= "3.7" and python_version < "4.0" \
+    --hash=sha256:beb4802a9cebb9144e99086eff703a642a13d6a0052920003a230f3294bbe784 \
+    --hash=sha256:c4d647b99872929fdb7bdcaa4fbe7f01413ed3d98077df798530e5b04f116c83
+zipp==3.4.0; python_version < "3.8" \
+    --hash=sha256:102c24ef8f171fd729d46599845e95c7ab894a4cf45f5de11a44cc7444fb1108 \
+    --hash=sha256:ed5eee1974372595f9e416cc7bbeeb12335201d8081ca8a0743c954d4446e5cb

requirements.txt

@@ -1,13 +1,66 @@
--i https://pypi.org/simple
-certifi==2018.10.15
-chardet==3.0.4
-falcon==1.4.1
-git+https://github.com/alanorth/SolrClient.git@c629e3475be37c82770b2be61748be7e29882648#egg=solrclient
-gunicorn==19.9.0
-idna==2.7
-kazoo==2.5.0
-psycopg2-binary==2.7.5
-python-mimeparse==1.6.0
-requests==2.20.0
-six==1.11.0
-urllib3==1.24
+certifi==2020.12.5 \
+    --hash=sha256:719a74fb9e33b9bd44cc7f3a8d94bc35e4049deebe19ba7d8e108280cfd59830 \
+    --hash=sha256:1a4995114262bffbc2413b159f2a1a480c969de6e6eb13ee966d470af86af59c
+chardet==4.0.0 \
+    --hash=sha256:f864054d66fd9118f2e67044ac8981a54775ec5b67aed0441892edb553d21da5 \
+    --hash=sha256:0d6f53a15db4120f2b08c94f11e7d93d2c911ee118b6b30a04ec3ee8310179fa
+falcon==2.0.0 \
+    --hash=sha256:733033ec80c896e30a43ab3e776856096836787197a44eb21022320a61311983 \
+    --hash=sha256:f93351459f110b4c1ee28556aef9a791832df6f910bea7b3f616109d534df06b \
+    --hash=sha256:e9efa0791b5d9f9dd9689015ea6bce0a27fcd5ecbcd30e6d940bffa4f7f03389 \
+    --hash=sha256:59d1e8c993b9a37ea06df9d72cf907a46cc8063b30717cdac2f34d1658b6f936 \
+    --hash=sha256:a5ebb22a04c9cc65081938ee7651b4e3b4d2a28522ea8ec04c7bdd2b3e9e8cd8 \
+    --hash=sha256:95bf6ce986c1119aef12c9b348f4dee9c6dcc58391bdd0bc2b0bf353c2b15986 \
+    --hash=sha256:aa184895d1ad4573fbfaaf803563d02f019ebdf4790e41cc568a330607eae439 \
+    --hash=sha256:74cf1d18207381c665b9e6292d65100ce146d958707793174b03869dc6e614f4 \
+    --hash=sha256:24adcd2b29a8ffa9d552dc79638cd21736a3fb04eda7d102c6cebafdaadb88ad \
+    --hash=sha256:18157af2a4fc3feedf2b5dcc6196f448639acf01c68bc33d4d5a04c3ef87f494 \
+    --hash=sha256:e3782b7b92fefd46a6ad1fd8fe63fe6c6f1b7740a95ca56957f48d1aee34b357 \
+    --hash=sha256:9712975adcf8c6e12876239085ad757b8fdeba223d46d23daef82b47658f83a9 \
+    --hash=sha256:54f2cb4b687035b2a03206dbfc538055cc48b59a953187b0458aa1b574d47b53 \
+    --hash=sha256:eea593cf466b9c126ce667f6d30503624ef24459f118c75594a69353b6c3d5fc
+gunicorn==20.0.4 \
+    --hash=sha256:cd4a810dd51bf497552cf3f863b575dabd73d6ad6a91075b65936b151cbf4f9c \
+    --hash=sha256:1904bb2b8a43658807108d59c3f3d56c2b6121a701161de0ddf9ad140073c626
+idna==2.10 \
+    --hash=sha256:b97d804b1e9b523befed77c48dacec60e6dcb0b5391d57af6a65a312a90648c0 \
+    --hash=sha256:b307872f855b18632ce0c21c5e45be78c0ea7ae4c15c828c20788b26921eb3f6
+psycopg2-binary==2.8.6 \
+    --hash=sha256:11b9c0ebce097180129e422379b824ae21c8f2a6596b159c7659e2e5a00e1aa0 \
+    --hash=sha256:d14b140a4439d816e3b1229a4a525df917d6ea22a0771a2a78332273fd9528a4 \
+    --hash=sha256:1fabed9ea2acc4efe4671b92c669a213db744d2af8a9fc5d69a8e9bc14b7a9db \
+    --hash=sha256:f5ab93a2cb2d8338b1674be43b442a7f544a0971da062a5da774ed40587f18f5 \
+    --hash=sha256:b4afc542c0ac0db720cf516dd20c0846f71c248d2b3d21013aa0d4ef9c71ca25 \
+    --hash=sha256:e74a55f6bad0e7d3968399deb50f61f4db1926acf4a6d83beaaa7df986f48b1c \
+    --hash=sha256:0deac2af1a587ae12836aa07970f5cb91964f05a7c6cdb69d8425ff4c15d4e2c \
+    --hash=sha256:ad20d2eb875aaa1ea6d0f2916949f5c08a19c74d05b16ce6ebf6d24f2c9f75d1 \
+    --hash=sha256:950bc22bb56ee6ff142a2cb9ee980b571dd0912b0334aa3fe0fe3788d860bea2 \
+    --hash=sha256:b8a3715b3c4e604bcc94c90a825cd7f5635417453b253499664f784fc4da0152 \
+    --hash=sha256:d1b4ab59e02d9008efe10ceabd0b31e79519da6fb67f7d8e8977118832d0f449 \
+    --hash=sha256:ac0c682111fbf404525dfc0f18a8b5f11be52657d4f96e9fcb75daf4f3984859 \
+    --hash=sha256:7d92a09b788cbb1aec325af5fcba9fed7203897bbd9269d5691bb1e3bce29550 \
+    --hash=sha256:aaa4213c862f0ef00022751161df35804127b78adf4a2755b9f991a507e425fd \
+    --hash=sha256:c2507d796fca339c8fb03216364cca68d87e037c1f774977c8fc377627d01c71 \
+    --hash=sha256:ee69dad2c7155756ad114c02db06002f4cded41132cc51378e57aad79cc8e4f4 \
+    --hash=sha256:e82aba2188b9ba309fd8e271702bd0d0fc9148ae3150532bbb474f4590039ffb \
+    --hash=sha256:d5227b229005a696cc67676e24c214740efd90b148de5733419ac9aaba3773da \
+    --hash=sha256:a0eb43a07386c3f1f1ebb4dc7aafb13f67188eab896e7397aa1ee95a9c884eb2 \
+    --hash=sha256:e1f57aa70d3f7cc6947fd88636a481638263ba04a742b4a37dd25c373e41491a \
+    --hash=sha256:833709a5c66ca52f1d21d41865a637223b368c0ee76ea54ca5bad6f2526c7679 \
+    --hash=sha256:ba28584e6bca48c59eecbf7efb1576ca214b47f05194646b081717fa628dfddf \
+    --hash=sha256:6a32f3a4cb2f6e1a0b15215f448e8ce2da192fd4ff35084d80d5e39da683e79b \
+    --hash=sha256:0e4dc3d5996760104746e6cfcdb519d9d2cd27c738296525d5867ea695774e67 \
+    --hash=sha256:cec7e622ebc545dbb4564e483dd20e4e404da17ae07e06f3e780b2dacd5cee66 \
+    --hash=sha256:ba381aec3a5dc29634f20692349d73f2d21f17653bda1decf0b52b11d694541f \
+    --hash=sha256:a0c50db33c32594305b0ef9abc0cb7db13de7621d2cadf8392a1d9b3c437ef77 \
+    --hash=sha256:2dac98e85565d5688e8ab7bdea5446674a83a3945a8f416ad0110018d1501b94 \
+    --hash=sha256:bd1be66dde2b82f80afb9459fc618216753f67109b859a361cf7def5c7968729 \
+    --hash=sha256:8cd0fb36c7412996859cb4606a35969dd01f4ea34d9812a141cd920c3b18be77 \
+    --hash=sha256:42ec1035841b389e8cc3692277a0bd81cdfe0b65d575a2c8862cec7a80e62e52 \
+    --hash=sha256:7312e931b90fe14f925729cde58022f5d034241918a5c4f9797cac62f6b3a9dd
+requests==2.25.1 \
+    --hash=sha256:c210084e36a42ae6b9219e00e48287def368a26d03a048ddad7bfee44f75871e \
+    --hash=sha256:27973dd4a904a4f13b263a19c866c13b92a39ed1c964655f025f3f8d3d75b804
+urllib3==1.26.2 \
+    --hash=sha256:d8ff90d979214d7b4f8ce956e80f4028fc6860e4431f731ea4a8c08f23f99473 \
+    --hash=sha256:19188f96923873c92ccb987120ec4acaa12f0461fa9ce5d3d0772bc965a39e08

setup.cfg

@@ -0,0 +1,6 @@
+[isort]
+multi_line_output=3
+include_trailing_comma=True
+force_grid_wrap=0
+use_parentheses=True
+line_length=88

tests/dspacestatistics.sql

@@ -0,0 +1,724 @@
+--
+-- PostgreSQL database dump
+--
+
+-- Dumped from database version 10.15 (Ubuntu 10.15-1.pgdg18.04+1)
+-- Dumped by pg_dump version 10.15 (Ubuntu 10.15-1.pgdg18.04+1)
+
+SET statement_timeout = 0;
+SET lock_timeout = 0;
+SET idle_in_transaction_session_timeout = 0;
+SET client_encoding = 'UTF8';
+SET standard_conforming_strings = on;
+SELECT pg_catalog.set_config('search_path', '', false);
+SET check_function_bodies = false;
+SET xmloption = content;
+SET client_min_messages = warning;
+SET row_security = off;
+
+--
+-- Name: plpgsql; Type: EXTENSION; Schema: -; Owner: 
+--
+
+CREATE EXTENSION IF NOT EXISTS plpgsql WITH SCHEMA pg_catalog;
+
+
+--
+-- Name: EXTENSION plpgsql; Type: COMMENT; Schema: -; Owner: 
+--
+
+COMMENT ON EXTENSION plpgsql IS 'PL/pgSQL procedural language';
+
+
+SET default_tablespace = '';
+
+SET default_with_oids = false;
+
+--
+-- Name: items; Type: TABLE; Schema: public; Owner: dspacestatistics
+--
+
+CREATE TABLE public.items (
+    id uuid NOT NULL,
+    views integer DEFAULT 0,
+    downloads integer DEFAULT 0
+);
+
+
+ALTER TABLE public.items OWNER TO dspacestatistics;
+
+--
+-- Data for Name: items; Type: TABLE DATA; Schema: public; Owner: dspacestatistics
+--
+
+COPY public.items (id, views, downloads) FROM stdin;
+8337cf0b-4215-4391-8ba5-72f0d6532417	99	105
+b41596f8-2986-4285-b409-893cb69eda25	799	101
+dfb10a04-71e4-47d5-9896-a60ccb5ea025	766	95
+b3a431f6-8da1-4efb-b162-feed75de7e6f	95	105
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+dc261c4c-9219-4419-a583-d60b93d12b0f	20	0
+9c61859f-96b6-4392-a838-d0f97bb6e2e7	47	0
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+8fda532b-af3a-4099-a5b2-f79ab2476bf2	36	0
+279a7025-3ea5-4d2b-9ffa-d8fb449945e1	152	0
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+844180f2-9b7b-451a-81a1-776aaea39c23	120	108
+8810a970-c2f9-4132-a0c1-841e0a08b35e	35	0
+fd8a46d5-1480-4e69-b187-cd3db96d8e4d	105	105
+8f90b3df-3db8-4f96-bfe9-989c62302092	28	0
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+04a557ce-1d5a-4de8-a570-9a1fc3bee89b	37	104
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+979fbd9b-ae0a-4bde-bcf7-2ea20976f5c2	48	0
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+e53a2eab-1e31-448d-907b-3656ca4e86c1	11640	0
+423b7a6a-c690-43e2-af07-ce65d409f821	22	0
+09b356bf-03e7-41b4-b338-6a8f50abb0eb	303	478
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+9495aa8b-528b-4f01-af9c-4f49e44d9b68	540	476
+8d52784d-ee5a-4d2c-8f4f-c9e796002ba9	10485	0
+99828091-801b-475e-b2ce-140f2cae6e23	48	0
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+387b01fc-83f8-4cd8-a0ed-bda8aaf28f7a	911	472
+40918d3b-65fa-4df0-b84e-1e23a0df0c59	9640	0
+6d8fa194-49d9-4f08-9b0b-dfb6d6c49c03	24	165
+ee8e3a6f-dd01-4e68-877a-33b04914f779	46	107
+6ad9918f-4360-444e-b18e-ea2cec4454c8	47	0
+b03bbb1e-e5ab-461a-952a-94a27bc37dc5	256	164
+eb749418-1fa0-458c-938c-44d739a90f9e	20	0
+03be08e6-dee2-4700-a856-d38778c777f8	107	106
+cb61bbcb-1e53-4538-ba12-52a85d0763de	9381	0
+eba158d7-0904-47f5-94d0-8e1292c25586	20	0
+7d45f9b3-3db9-4a58-85db-3b61ff3b4b22	60	484
+64b2b5eb-8544-4e58-955c-97b7cbe2314d	159	0
+176563cf-14d4-48f1-9641-898700e4b4bb	23	0
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+79b8ee1b-b7cc-40dc-a773-e4d5ef21e176	60	0
+03537c42-59bd-44b8-9aff-c16b884bb75b	20	16
+7412cf4f-e2e3-4410-ae69-976d82fe3af8	8733	0
+c60caacd-4022-4224-8c14-cda1fef5b36c	8514	0
+9453970d-863a-45c9-9b33-d56383fea749	122	103
+95848fd8-4498-4bc8-979b-545058db5971	138	103
+9ff56907-3bd5-4f1c-9dec-58be0323c641	34	0
+62bb9be7-c70f-4930-bc14-9a12deafdfe1	23	15
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+0e396352-52d2-4807-b0f2-430202d2cbe1	93	79
+f79539a9-4338-40be-a526-e737f4cdaa2a	116	79
+4a262bf4-e045-4f77-a1fd-521b2100b319	32	76
+\.
+
+
+--
+-- Name: items items_pkey; Type: CONSTRAINT; Schema: public; Owner: dspacestatistics
+--
+
+ALTER TABLE ONLY public.items
+    ADD CONSTRAINT items_pkey PRIMARY KEY (id);
+
+
+--
+-- PostgreSQL database dump complete
+--
+

tests/test_api.py

@@ -0,0 +1,382 @@
+from falcon import testing
+import json
+import pytest
+from unittest.mock import patch
+
+from dspace_statistics_api.app import api
+
+
+@pytest.fixture
+def client():
+    return testing.TestClient(api)
+
+
+def test_get_docs(client):
+    """Test requesting the documentation at the root."""
+
+    response = client.simulate_get("/")
+
+    assert isinstance(response.content, bytes)
+    assert response.status_code == 200
+
+
+def test_get_item(client):
+    """Test requesting a single item."""
+
+    response = client.simulate_get("/item/fd8a46d5-1480-4e69-b187-cd3db96d8e4d")
+    response_doc = json.loads(response.text)
+
+    assert isinstance(response_doc["downloads"], int)
+    assert isinstance(response_doc["id"], str)
+    assert isinstance(response_doc["views"], int)
+    assert response.status_code == 200
+
+
+def test_get_missing_item(client):
+    """Test requesting a single non-existing item."""
+
+    response = client.simulate_get("/item/c3910974-c3a5-4053-9dce-104aa7bb1620")
+
+    assert response.status_code == 404
+
+
+def test_get_items(client):
+    """Test requesting 100 items."""
+
+    response = client.simulate_get("/items", query_string="limit=100")
+    response_doc = json.loads(response.text)
+
+    assert isinstance(response_doc["currentPage"], int)
+    assert isinstance(response_doc["totalPages"], int)
+    assert isinstance(response_doc["statistics"], list)
+    assert response.status_code == 200
+
+
+def test_get_items_invalid_limit(client):
+    """Test requesting 100 items with an invalid limit parameter."""
+
+    response = client.simulate_get("/items", query_string="limit=101")
+
+    assert response.status_code == 400
+
+
+def test_get_items_invalid_page(client):
+    """Test requesting 100 items with an invalid page parameter."""
+
+    response = client.simulate_get("/items", query_string="page=-1")
+
+    assert response.status_code == 400
+
+
+@pytest.mark.xfail
+def test_post_items_valid_dateFrom(client):
+    """Test POSTing a request with a valid dateFrom parameter in the request body."""
+
+    request_body = {
+        "dateFrom": "2020-01-01T00:00:00Z",
+        "items": [
+            "fd8a46d5-1480-4e69-b187-cd3db96d8e4d",
+            "e53a2eab-1e31-448d-907b-3656ca4e86c1",
+        ],
+    }
+
+    response = client.simulate_post("/items", json=request_body)
+
+    assert response.status_code == 200
+    assert response.json["limit"] == 100
+    assert response.json["currentPage"] == 0
+    assert isinstance(response.json["totalPages"], int)
+    assert len(response.json["statistics"]) == 2
+    assert isinstance(response.json["statistics"][0]["views"], int)
+    assert isinstance(response.json["statistics"][0]["downloads"], int)
+    assert isinstance(response.json["statistics"][1]["views"], int)
+    assert isinstance(response.json["statistics"][1]["downloads"], int)
+
+
+def test_post_items_valid_dateFrom_mocked(client):
+    """Mock test POSTing a request with a valid dateFrom parameter in the request body."""
+
+    request_body = {
+        "dateFrom": "2020-01-01T00:00:00Z",
+        "items": [
+            "fd8a46d5-1480-4e69-b187-cd3db96d8e4d",
+            "e53a2eab-1e31-448d-907b-3656ca4e86c1",
+        ],
+    }
+
+    get_views_return_value = {
+        "fd8a46d5-1480-4e69-b187-cd3db96d8e4d": 21,
+        "e53a2eab-1e31-448d-907b-3656ca4e86c1": 0,
+    }
+    get_downloads_return_value = {
+        "fd8a46d5-1480-4e69-b187-cd3db96d8e4d": 575,
+        "e53a2eab-1e31-448d-907b-3656ca4e86c1": 899,
+    }
+
+    with patch(
+        "dspace_statistics_api.app.get_views", return_value=get_views_return_value
+    ):
+        with patch(
+            "dspace_statistics_api.app.get_downloads",
+            return_value=get_downloads_return_value,
+        ):
+            response = client.simulate_post("/items", json=request_body)
+
+    assert response.status_code == 200
+    assert response.json["limit"] == 100
+    assert response.json["currentPage"] == 0
+    assert isinstance(response.json["totalPages"], int)
+    assert len(response.json["statistics"]) == 2
+    assert isinstance(response.json["statistics"][0]["views"], int)
+    assert isinstance(response.json["statistics"][0]["downloads"], int)
+    assert isinstance(response.json["statistics"][1]["views"], int)
+    assert isinstance(response.json["statistics"][1]["downloads"], int)
+
+
+def test_post_items_invalid_dateFrom(client):
+    """Test POSTing a request with an invalid dateFrom parameter in the request body."""
+
+    request_body = {
+        "dateFrom": "2020-01-01T00:00:00",
+        "items": [
+            "fd8a46d5-1480-4e69-b187-cd3db96d8e4d",
+            "e53a2eab-1e31-448d-907b-3656ca4e86c1",
+        ],
+    }
+
+    response = client.simulate_post("/items", json=request_body)
+
+    assert response.status_code == 400
+
+
+@pytest.mark.xfail
+def test_post_items_valid_dateTo(client):
+    """Test POSTing a request with a valid dateTo parameter in the request body."""
+
+    request_body = {
+        "dateTo": "2020-01-01T00:00:00Z",
+        "items": [
+            "fd8a46d5-1480-4e69-b187-cd3db96d8e4d",
+            "e53a2eab-1e31-448d-907b-3656ca4e86c1",
+        ],
+    }
+
+    response = client.simulate_post("/items", json=request_body)
+
+    assert response.status_code == 200
+    assert response.json["limit"] == 100
+    assert response.json["currentPage"] == 0
+    assert isinstance(response.json["totalPages"], int)
+    assert len(response.json["statistics"]) == 2
+    assert isinstance(response.json["statistics"][0]["views"], int)
+    assert isinstance(response.json["statistics"][0]["downloads"], int)
+    assert isinstance(response.json["statistics"][1]["views"], int)
+    assert isinstance(response.json["statistics"][1]["downloads"], int)
+
+
+def test_post_items_valid_dateTo_mocked(client):
+    """Mock test POSTing a request with a valid dateTo parameter in the request body."""
+
+    request_body = {
+        "dateTo": "2020-01-01T00:00:00Z",
+        "items": [
+            "fd8a46d5-1480-4e69-b187-cd3db96d8e4d",
+            "e53a2eab-1e31-448d-907b-3656ca4e86c1",
+        ],
+    }
+
+    get_views_return_value = {
+        "fd8a46d5-1480-4e69-b187-cd3db96d8e4d": 21,
+        "e53a2eab-1e31-448d-907b-3656ca4e86c1": 0,
+    }
+    get_downloads_return_value = {
+        "fd8a46d5-1480-4e69-b187-cd3db96d8e4d": 575,
+        "e53a2eab-1e31-448d-907b-3656ca4e86c1": 899,
+    }
+
+    with patch(
+        "dspace_statistics_api.app.get_views", return_value=get_views_return_value
+    ):
+        with patch(
+            "dspace_statistics_api.app.get_downloads",
+            return_value=get_downloads_return_value,
+        ):
+            response = client.simulate_post("/items", json=request_body)
+
+    assert response.status_code == 200
+    assert response.json["limit"] == 100
+    assert response.json["currentPage"] == 0
+    assert isinstance(response.json["totalPages"], int)
+    assert len(response.json["statistics"]) == 2
+    assert isinstance(response.json["statistics"][0]["views"], int)
+    assert isinstance(response.json["statistics"][0]["downloads"], int)
+    assert isinstance(response.json["statistics"][1]["views"], int)
+    assert isinstance(response.json["statistics"][1]["downloads"], int)
+
+
+def test_post_items_invalid_dateTo(client):
+    """Test POSTing a request with an invalid dateTo parameter in the request body."""
+
+    request_body = {
+        "dateFrom": "2020-01-01T00:00:00",
+        "items": [
+            "fd8a46d5-1480-4e69-b187-cd3db96d8e4d",
+            "e53a2eab-1e31-448d-907b-3656ca4e86c1",
+        ],
+    }
+
+    response = client.simulate_post("/items", json=request_body)
+
+    assert response.status_code == 400
+
+
+@pytest.mark.xfail
+def test_post_items_valid_limit(client):
+    """Test POSTing a request with a valid limit parameter in the request body."""
+
+    request_body = {
+        "limit": 1,
+        "items": [
+            "fd8a46d5-1480-4e69-b187-cd3db96d8e4d",
+            "e53a2eab-1e31-448d-907b-3656ca4e86c1",
+        ],
+    }
+
+    response = client.simulate_post("/items", json=request_body)
+
+    assert response.status_code == 200
+    assert response.json["limit"] == 1
+    assert response.json["currentPage"] == 0
+    assert isinstance(response.json["totalPages"], int)
+    assert len(response.json["statistics"]) == 1
+    assert isinstance(response.json["statistics"][0]["views"], int)
+    assert isinstance(response.json["statistics"][0]["downloads"], int)
+
+
+def test_post_items_valid_limit_mocked(client):
+    """Mock test POSTing a request with a valid limit parameter in the request body."""
+
+    request_body = {
+        "limit": 1,
+        "items": [
+            "fd8a46d5-1480-4e69-b187-cd3db96d8e4d",
+            "e53a2eab-1e31-448d-907b-3656ca4e86c1",
+        ],
+    }
+
+    get_views_return_value = {"fd8a46d5-1480-4e69-b187-cd3db96d8e4d": 21}
+    get_downloads_return_value = {"fd8a46d5-1480-4e69-b187-cd3db96d8e4d": 575}
+
+    with patch(
+        "dspace_statistics_api.app.get_views", return_value=get_views_return_value
+    ):
+        with patch(
+            "dspace_statistics_api.app.get_downloads",
+            return_value=get_downloads_return_value,
+        ):
+            response = client.simulate_post("/items", json=request_body)
+
+    assert response.status_code == 200
+    assert response.json["limit"] == 1
+    assert response.json["currentPage"] == 0
+    assert isinstance(response.json["totalPages"], int)
+    assert len(response.json["statistics"]) == 1
+    assert isinstance(response.json["statistics"][0]["views"], int)
+    assert isinstance(response.json["statistics"][0]["downloads"], int)
+
+
+def test_post_items_invalid_limit(client):
+    """Test POSTing a request with an invalid limit parameter in the request body."""
+
+    request_body = {
+        "limit": -1,
+        "items": [
+            "fd8a46d5-1480-4e69-b187-cd3db96d8e4d",
+            "e53a2eab-1e31-448d-907b-3656ca4e86c1",
+        ],
+    }
+
+    response = client.simulate_post("/items", json=request_body)
+
+    assert response.status_code == 400
+
+
+@pytest.mark.xfail
+def test_post_items_valid_page(client):
+    """Test POSTing a request with a valid page parameter in the request body."""
+
+    request_body = {
+        "page": 0,
+        "items": [
+            "fd8a46d5-1480-4e69-b187-cd3db96d8e4d",
+            "e53a2eab-1e31-448d-907b-3656ca4e86c1",
+        ],
+    }
+
+    response = client.simulate_post("/items", json=request_body)
+
+    assert response.status_code == 200
+    assert response.json["limit"] == 100
+    assert response.json["currentPage"] == 0
+    assert response.json["totalPages"] == 0
+    assert len(response.json["statistics"]) == 2
+    assert isinstance(response.json["statistics"][0]["views"], int)
+    assert isinstance(response.json["statistics"][0]["downloads"], int)
+    assert isinstance(response.json["statistics"][1]["views"], int)
+    assert isinstance(response.json["statistics"][1]["downloads"], int)
+
+
+def test_post_items_valid_page_mocked(client):
+    """Mock test POSTing a request with a valid page parameter in the request body."""
+
+    request_body = {
+        "page": 0,
+        "items": [
+            "fd8a46d5-1480-4e69-b187-cd3db96d8e4d",
+            "e53a2eab-1e31-448d-907b-3656ca4e86c1",
+        ],
+    }
+
+    get_views_return_value = {
+        "fd8a46d5-1480-4e69-b187-cd3db96d8e4d": 21,
+        "e53a2eab-1e31-448d-907b-3656ca4e86c1": 0,
+    }
+    get_downloads_return_value = {
+        "fd8a46d5-1480-4e69-b187-cd3db96d8e4d": 575,
+        "e53a2eab-1e31-448d-907b-3656ca4e86c1": 899,
+    }
+
+    with patch(
+        "dspace_statistics_api.app.get_views", return_value=get_views_return_value
+    ):
+        with patch(
+            "dspace_statistics_api.app.get_downloads",
+            return_value=get_downloads_return_value,
+        ):
+            response = client.simulate_post("/items", json=request_body)
+
+    assert response.status_code == 200
+    assert response.json["limit"] == 100
+    assert response.json["currentPage"] == 0
+    assert isinstance(response.json["totalPages"], int)
+    assert len(response.json["statistics"]) == 2
+    assert isinstance(response.json["statistics"][0]["views"], int)
+    assert isinstance(response.json["statistics"][0]["downloads"], int)
+    assert isinstance(response.json["statistics"][1]["views"], int)
+    assert isinstance(response.json["statistics"][1]["downloads"], int)
+
+
+def test_post_items_invalid_page(client):
+    """Test POSTing a request with an invalid page parameter in the request body."""
+
+    request_body = {
+        "page": -1,
+        "items": [
+            "fd8a46d5-1480-4e69-b187-cd3db96d8e4d",
+            "e53a2eab-1e31-448d-907b-3656ca4e86c1",
+        ],
+    }
+
+    response = client.simulate_post("/items", json=request_body)
+
+    assert response.status_code == 400