Files
legado-ios/App/Features/RSS/RSSLibraryModel.swift
T

243 lines
12 KiB
Swift

import Foundation
import SwiftUI
@MainActor
final class RSSLibraryModel: ObservableObject {
@Published private(set) var sources: [RssSource] = []
@Published private(set) var articles: [RssArticle] = []
@Published private(set) var stars: [RssStar] = []
@Published private(set) var records: [RssReadRecord] = []
@Published private(set) var isWorking = false
@Published var errorMessage: String?
private let sourceRepository: SQLiteRssSourceRepository
private let articleRepository: SQLiteRssArticleRepository
private let starRepository: SQLiteRssStarRepository
private let recordRepository: SQLiteRssReadRecordRepository
private let service: RSSService
private let importer = RSSSourceImporter()
private let database: LegadoDatabase
private var nextURL: String?
private var page = 1
private var order: Int64 = 0
init(database: LegadoDatabase, service: RSSService = .init()) {
self.database = database
sourceRepository = .init(database: database)
articleRepository = .init(database: database)
starRepository = .init(database: database)
recordRepository = .init(database: database)
self.service = service
}
static func live() -> RSSLibraryModel {
let database = try! LegadoDatabase(url: LegadoDatabase.defaultURL())
return .init(database: database)
}
func load() async {
do {
async let loadedSources = sourceRepository.all()
async let loadedStars = starRepository.all()
async let loadedRecords = recordRepository.all()
(sources, stars, records) = try await (loadedSources, loadedStars, loadedRecords)
} catch { errorMessage = error.localizedDescription }
}
func importFiles(_ urls: [URL]) async {
await perform {
var merged = self.sources
for url in urls {
let granted = url.startAccessingSecurityScopedResource()
defer { if granted { url.stopAccessingSecurityScopedResource() } }
let payload = try self.importer.decode(Data(contentsOf: url))
merged = try self.importer.merge(payload.sources, into: merged)
for remote in payload.subscriptionURLs { merged = try await self.importRemote(remote, existing: merged) }
}
try await self.sourceRepository.save(merged)
self.sources = try await self.sourceRepository.all()
}
}
func importText(_ text: String) async {
await perform {
let trimmed = text.trimmingCharacters(in: .whitespacesAndNewlines)
if let url = URL(string: trimmed), ["http", "https"].contains(url.scheme?.lowercased() ?? "") {
self.sources = try await self.importRemote(trimmed, existing: self.sources)
} else {
let payload = try self.importer.decode(Data(trimmed.utf8))
var merged = try self.importer.merge(payload.sources, into: self.sources)
for remote in payload.subscriptionURLs { merged = try await self.importRemote(remote, existing: merged) }
self.sources = merged
}
try await self.sourceRepository.save(self.sources)
}
}
func applySilentSubscription(_ data: Data) async throws {
let incoming = try importer.decode(data).sources
var updated = sources
for var source in incoming {
if let index = updated.firstIndex(where: { $0.sourceUrl == source.sourceUrl }) {
guard updated[index].lastUpdateTime < source.lastUpdateTime else { continue }
source.sourceGroup = updated[index].sourceGroup
updated[index] = source
} else { updated.append(source) }
}
try await sourceRepository.save(updated)
sources = try await sourceRepository.all()
}
func setEnabled(_ enabled: Bool, source: RssSource) async {
do { try await sourceRepository.setEnabled(enabled, sourceURL: source.sourceUrl); sources = try await sourceRepository.all() }
catch { errorMessage = error.localizedDescription }
}
func remove(_ source: RssSource) async {
do { try await sourceRepository.remove(sourceURL: source.sourceUrl); sources = try await sourceRepository.all() }
catch { errorMessage = error.localizedDescription }
}
func moveSources(from offsets: IndexSet, to destination: Int) async {
var values = sources
values.move(fromOffsets: offsets, toOffset: destination)
for index in values.indices { values[index].customOrder = index }
do { try await sourceRepository.save(values); sources = try await sourceRepository.all() }
catch { errorMessage = error.localizedDescription }
}
func save(_ value: RssSource, replacing originalURL: String?) async -> Bool {
let name = value.sourceName.trimmingCharacters(in: .whitespacesAndNewlines)
let url = value.sourceUrl.trimmingCharacters(in: .whitespacesAndNewlines)
guard !name.isEmpty, !url.isEmpty else { errorMessage = "源名称和URL不能为空"; return false }
do {
var source = value; source.sourceName = name; source.sourceUrl = url
let original = originalURL.flatMap { key in sources.first { $0.sourceUrl == key } }
let encoder = JSONEncoder()
let oldData = try encoder.encode(original)
let newData = try encoder.encode(source)
if oldData != newData { source.lastUpdateTime = Int64(Date().timeIntervalSince1970 * 1_000) }
if let originalURL, originalURL != source.sourceUrl {
try await starRepository.updateOrigin(from: originalURL, to: source.sourceUrl)
try await articleRepository.updateOrigin(from: originalURL, to: source.sourceUrl)
try await database.deleteSourceVariables(originalURL)
}
var values = sources.filter { $0.sourceUrl != originalURL && $0.sourceUrl != source.sourceUrl }
values.append(source)
try await sourceRepository.save(values)
sources = try await sourceRepository.all()
return true
} catch { errorMessage = error.localizedDescription; return false }
}
func refresh(_ source: RssSource, sortName: String? = nil, sortURL: String? = nil, key: String? = nil) async {
page = 1; order = Int64(Date().timeIntervalSince1970 * 1_000)
let name = sortName ?? source.sourceName
let url = sortURL ?? source.sortUrl?.nilIfBlank ?? source.sourceUrl
await perform {
let report = try await self.service.articles(sortName: name, sortURL: url, source: source, page: 1, key: key)
var values = report.result.articles
for index in values.indices { values[index].order = self.order; self.order -= 1 }
try await self.articleRepository.put(values)
if source.ruleNextPage?.isEmpty == false { try await self.articleRepository.clearOld(origin: source.sourceUrl, sort: name, before: self.order) }
self.nextURL = report.result.nextURL
self.articles = try await self.articleRepository.articles(origin: source.sourceUrl, sort: name)
}
}
func loadMore(_ source: RssSource, sortName: String? = nil, key: String? = nil) async {
guard let nextURL, !nextURL.isEmpty else { return }
page += 1
let name = sortName ?? source.sourceName
await perform {
let report = try await self.service.articles(sortName: name, sortURL: nextURL, source: source, page: self.page, key: key)
var values = report.result.articles
for index in values.indices { values[index].order = self.order; self.order -= 1 }
try await self.articleRepository.append(values)
self.nextURL = report.result.nextURL
self.articles = try await self.articleRepository.articles(origin: source.sourceUrl, sort: name)
}
}
func read(_ article: RssArticle) async {
do {
try await recordRepository.insertIgnoringExisting(article.record())
records = try await recordRepository.all()
if let index = articles.firstIndex(of: article) { articles[index].read = true }
}
catch { errorMessage = error.localizedDescription }
}
func readingMode(for article: RssArticle, source: RssSource) async -> RSSReadingMode {
let policy = RSSReadingPolicy()
if article.type == 0, article.description?.nilIfBlank != nil {
return policy.mode(article: article, source: source)
}
guard let rule = source.ruleContent?.nilIfBlank else {
return policy.mode(article: article, source: source)
}
do {
let content = try await service.content(article: article, rule: rule, source: source)
if article.type == 0 {
var updated = article; updated.description = content
try await articleRepository.put([updated])
if var star = try await starRepository.star(origin: article.origin, link: article.link) {
star.description = content; try await starRepository.save(star); stars = try await starRepository.all()
}
}
return policy.mode(article: article, source: source, resolvedContent: content)
} catch {
errorMessage = error.localizedDescription
if article.type == 0 { return .html(content: "加载正文失败\n\(error.localizedDescription)", baseURL: nil) }
return policy.mode(article: article, source: source)
}
}
func toggleStar(_ article: RssArticle) async {
do {
if try await starRepository.star(origin: article.origin, link: article.link) != nil {
try await starRepository.remove(origin: article.origin, link: article.link)
} else { try await starRepository.save(article.star()) }
stars = try await starRepository.all()
} catch { errorMessage = error.localizedDescription }
}
func isStarred(_ article: RssArticle) -> Bool { stars.contains { $0.origin == article.origin && $0.link == article.link } }
func removeStar(_ value: RssStar) async {
do { try await starRepository.remove(origin: value.origin, link: value.link); stars = try await starRepository.all() }
catch { errorMessage = error.localizedDescription }
}
func saveStar(_ value: RssStar) async {
do { try await starRepository.save(value); stars = try await starRepository.all() }
catch { errorMessage = error.localizedDescription }
}
func clearStars() async {
do { try await starRepository.clear(); stars = [] }
catch { errorMessage = error.localizedDescription }
}
func clearRecords() async {
do { try await recordRepository.clear(); records = [] }
catch { errorMessage = error.localizedDescription }
}
private func importRemote(_ value: String, existing: [RssSource]) async throws -> [RssSource] {
let withoutUA = value.hasSuffix("#requestWithoutUA")
let raw = withoutUA ? String(value.dropLast("#requestWithoutUA".count)) : value
guard let url = URL(string: raw) else { throw URLError(.badURL) }
var request = URLRequest(url: url)
if withoutUA { request.setValue("", forHTTPHeaderField: "User-Agent") }
let (data, response) = try await URLSessionHTTPTransport.shared.download(for: request)
guard (response as? HTTPURLResponse).map({ (200...299).contains($0.statusCode) }) != false else { throw URLError(.badServerResponse) }
let payload = try importer.decode(data)
return try importer.merge(payload.sources, into: existing)
}
private func perform(_ operation: () async throws -> Void) async {
isWorking = true; defer { isWorking = false }
do { try await operation() } catch { errorMessage = error.localizedDescription }
}
}
private extension String {
var nilIfBlank: String? { trimmingCharacters(in: .whitespacesAndNewlines).isEmpty ? nil : self }
}