138 lines
3.4 KiB
Swift
138 lines
3.4 KiB
Swift
//
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// OPMLFile.swift
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// Account
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//
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// Created by Maurice Parker on 9/12/19.
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// Copyright © 2019 Ranchero Software, LLC. All rights reserved.
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//
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import Foundation
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import os.log
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import RSCore
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import RSParser
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final class OPMLFile {
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private var log = OSLog(subsystem: Bundle.main.bundleIdentifier!, category: "opmlFile")
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private let fileURL: URL
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private let account: Account
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private lazy var managedFile = ManagedResourceFile(fileURL: fileURL, load: loadCallback, save: saveCallback)
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init(filename: String, account: Account) {
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self.fileURL = URL(fileURLWithPath: filename)
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self.account = account
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}
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func markAsDirty() {
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managedFile.markAsDirty()
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}
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func load() {
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managedFile.load()
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}
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func save() {
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managedFile.saveIfNecessary()
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}
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}
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private extension OPMLFile {
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func loadCallback() {
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guard let opmlItems = parsedOPMLItems() else { return }
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BatchUpdate.shared.perform {
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account.topLevelFeeds.removeAll()
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account.loadOPMLItems(opmlItems, parentFolder: nil)
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}
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}
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func saveCallback() {
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guard !account.isDeleted else { return }
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let opmlDocumentString = opmlDocument()
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let errorPointer: NSErrorPointer = nil
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let fileCoordinator = NSFileCoordinator(filePresenter: managedFile)
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fileCoordinator.coordinate(writingItemAt: fileURL, options: [], error: errorPointer, byAccessor: { writeURL in
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do {
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try opmlDocumentString.write(to: writeURL, atomically: true, encoding: .utf8)
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} catch let error as NSError {
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os_log(.error, log: log, "OPML save to disk failed: %@.", error.localizedDescription)
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}
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})
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if let error = errorPointer?.pointee {
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os_log(.error, log: log, "OPML save to disk coordination failed: %@.", error.localizedDescription)
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}
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}
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func parsedOPMLItems() -> [RSOPMLItem]? {
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var fileData: Data? = nil
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let errorPointer: NSErrorPointer = nil
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let fileCoordinator = NSFileCoordinator(filePresenter: managedFile)
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fileCoordinator.coordinate(readingItemAt: fileURL, options: [], error: errorPointer, byAccessor: { readURL in
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do {
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fileData = try Data(contentsOf: readURL)
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} catch {
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// Commented out because it’s not an error on first run.
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// TODO: make it so we know if it’s first run or not.
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//NSApplication.shared.presentError(error)
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os_log(.error, log: log, "OPML read from disk failed: %@.", error.localizedDescription)
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}
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})
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if let error = errorPointer?.pointee {
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os_log(.error, log: log, "OPML read from disk coordination failed: %@.", error.localizedDescription)
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}
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guard let opmlData = fileData else {
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return nil
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}
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let parserData = ParserData(url: fileURL.absoluteString, data: opmlData)
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var opmlDocument: RSOPMLDocument?
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do {
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opmlDocument = try RSOPMLParser.parseOPML(with: parserData)
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} catch {
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os_log(.error, log: log, "OPML Import failed: %@.", error.localizedDescription)
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return nil
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}
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return opmlDocument?.children
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}
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func opmlDocument() -> String {
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let escapedTitle = account.nameForDisplay.rs_stringByEscapingSpecialXMLCharacters()
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let openingText =
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"""
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<?xml version="1.0" encoding="UTF-8"?>
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<!-- OPML generated by NetNewsWire -->
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<opml version="1.1">
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<head>
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<title>\(escapedTitle)</title>
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</head>
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<body>
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"""
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let middleText = account.OPMLString(indentLevel: 0, strictConformance: false)
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let closingText =
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"""
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</body>
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</opml>
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"""
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let opml = openingText + middleText + closingText
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return opml
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}
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}
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