CollectionListModel.swift
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CollectionListModel.swift
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	import SwiftUI
	import CoreData

	class CollectionListModel: ObservableObject {
	@Published var userCollections = [WFACollection]()

	init() {
	loadCachedUserCollections()
	}

	func loadCachedUserCollections() {
	let request = WFACollection.createFetchRequest()
	let sort = NSSortDescriptor(key: "title", ascending: true)
	request.sortDescriptors = [sort]

	userCollections = []
	do {
	let cachedCollections = try PersistenceManager.persistentContainer.viewContext.fetch(request)
	userCollections.append(contentsOf: cachedCollections)
	} catch {
	print("Error: Failed to fetch cached user collections.")
	}
	}

	func clearUserCollection() {
	// Make sure the userCollections property is properly populated.
	// FIXME: Without this, sometimes the userCollections array is empty.
	loadCachedUserCollections()

	for userCollection in userCollections {
	PersistenceManager.persistentContainer.viewContext.delete(userCollection)
	}
	PersistenceManager().saveContext()

	userCollections = []
	}
	}