import pandas as pd def issn(field): """Check if an ISSN is valid. Prints the ISSN if invalid. stdnum's is_valid() function never raises an exception. See: https://arthurdejong.org/python-stdnum/doc/1.11/index.html#stdnum.module.is_valid """ from stdnum import issn # Skip fields with missing values if pd.isna(field): return # Try to split multi-value field on "||" separator for value in field.split("||"): if not issn.is_valid(value): print(f"Invalid ISSN: {value}") return field def isbn(field): """Check if an ISBN is valid. Prints the ISBN if invalid. stdnum's is_valid() function never raises an exception. See: https://arthurdejong.org/python-stdnum/doc/1.11/index.html#stdnum.module.is_valid """ from stdnum import isbn # Skip fields with missing values if pd.isna(field): return # Try to split multi-value field on "||" separator for value in field.split("||"): if not isbn.is_valid(value): print(f"Invalid ISBN: {value}") return field def separators(field, field_name): """Check for invalid multi-value separators (ie "|" or "|||"). Prints the field with the invalid multi-value separator. """ import re # Skip fields with missing values if pd.isna(field): return # Try to split multi-value field on "||" separator for value in field.split("||"): # After splitting, see if there are any remaining "|" characters match = re.findall(r"^.*?\|.*$", value) if match: print(f"Invalid multi-value separator ({field_name}): {field}") return field def date(field, field_name): """Check if a date is valid. In DSpace the issue date is usually 1990, 1990-01, or 1990-01-01, but it could technically even include time as long as it is ISO8601. Also checks for other invalid cases like missing and multiple dates. Prints the date if invalid. """ from datetime import datetime if pd.isna(field): print(f"Missing date ({field_name}).") return # Try to split multi-value field on "||" separator multiple_dates = field.split("||") # We don't allow multi-value date fields if len(multiple_dates) > 1: print(f"Multiple dates not allowed ({field_name}): {field}") return field try: # Check if date is valid YYYY format datetime.strptime(field, "%Y") return field except ValueError: pass try: # Check if date is valid YYYY-MM format datetime.strptime(field, "%Y-%m") return field except ValueError: pass try: # Check if date is valid YYYY-MM-DD format datetime.strptime(field, "%Y-%m-%d") return field except ValueError: print(f"Invalid date ({field_name}): {field}") return field def suspicious_characters(field, field_name): """Warn about suspicious characters. Look for standalone characters that could indicate encoding or copy/paste errors for languages with accents. For example: foreˆt should be forêt. """ # Skip fields with missing values if pd.isna(field): return # List of suspicious characters, for example: ́ˆ~` suspicious_characters = ["\u00B4", "\u02C6", "\u007E", "\u0060"] for character in suspicious_characters: # Find the position of the suspicious character in the string suspicious_character_position = field.find(character) # Python returns -1 if there is no match if suspicious_character_position != -1: # Create a temporary new string starting from the position of the # suspicious character field_subset = field[suspicious_character_position:] # Print part of the metadata value starting from the suspicious # character and spanning enough of the rest to give a preview, # but not too much to cause the line to break in terminals with # a default of 80 characters width. suspicious_character_msg = ( f"Suspicious character ({field_name}): {field_subset}" ) print(f"{suspicious_character_msg:1.80}") return field def language(field): """Check if a language is valid ISO 639-1 (alpha 2) or ISO 639-3 (alpha 3). Prints the value if it is invalid. """ from pycountry import languages # Skip fields with missing values if pd.isna(field): return # need to handle "Other" values here... # Try to split multi-value field on "||" separator for value in field.split("||"): # After splitting, check if language value is 2 or 3 characters so we # can check it against ISO 639-1 or ISO 639-3 accordingly. if len(value) == 2: if not languages.get(alpha_2=value): print(f"Invalid ISO 639-1 language: {value}") pass elif len(value) == 3: if not languages.get(alpha_3=value): print(f"Invalid ISO 639-3 language: {value}") pass else: print(f"Invalid language: {value}") return field def agrovoc(field, field_name): """Check subject terms against AGROVOC REST API. Function constructor expects the field as well as the field name because many fields can now be validated against AGROVOC and we want to be able to inform the user in which field the invalid term is. Logic copied from agrovoc-lookup.py. See: https://github.com/ilri/DSpace/blob/5_x-prod/agrovoc-lookup.py Prints a warning if the value is invalid. """ from datetime import timedelta import requests import requests_cache # Skip fields with missing values if pd.isna(field): return # enable transparent request cache with thirty days expiry expire_after = timedelta(days=30) requests_cache.install_cache("agrovoc-response-cache", expire_after=expire_after) # prune old cache entries requests_cache.core.remove_expired_responses() # Try to split multi-value field on "||" separator for value in field.split("||"): request_url = "http://agrovoc.uniroma2.it/agrovoc/rest/v1/agrovoc/search" request_params = {"query": value} request = requests.get(request_url, params=request_params) if request.status_code == requests.codes.ok: data = request.json() # check if there are any results if len(data["results"]) == 0: print(f"Invalid AGROVOC ({field_name}): {value}") return field def filename_extension(field): """Check filename extension. CSVs with a 'filename' column are likely meant as input for the SAFBuilder tool, which creates a Simple Archive Format bundle for importing metadata with accompanying PDFs or other files into DSpace. This check warns if a filename has an uncommon extension (that is, other than .pdf, .xls(x), .doc(x), ppt(x), case insensitive). """ import re # Skip fields with missing values if pd.isna(field): return # Try to split multi-value field on "||" separator values = field.split("||") # List of common filename extentions common_filename_extensions = [ ".pdf", ".doc", ".docx", ".ppt", ".pptx", ".xls", ".xlsx", ] # Iterate over all values for value in values: # Assume filename extension does not match filename_extension_match = False for filename_extension in common_filename_extensions: # Check for extension at the end of the filename pattern = re.escape(filename_extension) + r"$" match = re.search(pattern, value, re.IGNORECASE) if match is not None: # Register the match and stop checking for this filename filename_extension_match = True break if filename_extension_match is False: print(f"Filename with uncommon extension: {value}") return field