# @name: resources.py # @creation_date: 2022-02-23 # @license: The MIT License # @author: Simon Bowie # @purpose: functions for resources # @acknowledgements: # isbntools: https://isbntools.readthedocs.io/en/latest/info.html # regex for URLs: https://gist.github.com/gruber/249502 from flask import Blueprint, render_template, request, flash, redirect, url_for from .models import Resource from werkzeug.exceptions import abort from . import db from .relationships import * from isbntools.app import * import requests import re from sqlalchemy.sql import func import markdown # function to retrieve data about a single resource from the database def get_resource(resource_id): resource = Resource.query.filter_by(id=resource_id).first() if resource is None: abort(404) return resource # function to retrieve data about a resource and its relationships def get_full_resource(resource_id): resource = get_resource(resource_id) resource = append_relationships(resource) if resource.type == 'book': # render Markdown as HTML resource.description = markdown.markdown(resource.description) # get additional book metadata book_data = get_book_data(resource.isbn) if book_data: resource.__dict__.update(book_data) return resource # function to retrieve data about a curated list of resources def get_curated_resources(resource_ids): resources = Resource.query.filter(Resource.id.in_(resource_ids)).filter_by(published=True).order_by(func.random()).all() # append relationships to each resource append_relationships_multiple(resources) return resources # function to delete a single resource def delete_resource(resource_id): deletion = Resource.query.get(resource_id) db.session.delete(deletion) db.session.commit() flash('Successfully deleted!') # function to get filters for a specific field def get_filter_values(field, type): # get field values for filter field_filter = Resource.query.filter_by(type=type).filter_by(published=True).with_entities(getattr(Resource, field)) # turn SQLAlchemy object into list field_filter = [i for i, in field_filter] # split each element on '/' (useful for scriptingLanguage only) field_filter = [y for x in field_filter for y in x.split(' / ')] # consolidate duplicate values field_filter = list(dict.fromkeys(field_filter)) # filter None values from list field_filter = filter(None, field_filter) # sort list by alphabetical order field_filter = sorted(field_filter) return field_filter # function to get book data including metadata and covers def get_book_data(isbn): try: book = meta(isbn) description = {'desc': desc(isbn)} book.update(description) #book = get_book_cover(book) return book except: pass # function to get book cover data def get_book_cover(book): # get highest-resolution book cover possible openl_url = 'https://covers.openlibrary.org/b/isbn/' + book['ISBN-13'] + '-L.jpg?default=false' request = requests.get(openl_url) if request.status_code != 200: book.update(cover(isbn)) else: book_cover = {'thumbnail': openl_url} book.update(book_cover) return book # function to retrieve last updated date from the database def get_last_date(): resource = Resource.query.order_by(Resource.created.asc()).filter_by(published=True).first() return resource.created.isoformat()