IceCubes/Packages/Env/Sources/Env/QuickLook.swift
Thomas Ricouard 4189a59cf6
iOS 17+ only support + migrating to Observation framework (#1571)
* Initial iOS 17 + Observable migration

* More Observation

* More observation

* Checkpoint

* Checkpoint

* Bump version to 1.8.0

* SwiftFormat

* Fix home timeline switch on login

* Fix sidebar routerPath

* Fixes on detail view

* Remove print changes

* Simply detail view

* More opt

* Migrate DisplaySettingsLocalValues

* Better post detail transition

* Status detail animation finally right

* Cleanup
2023-09-18 07:01:23 +02:00

88 lines
2.6 KiB
Swift

import Combine
@preconcurrency import QuickLook
import SwiftUI
@MainActor
@Observable public class QuickLook {
public var url: URL? {
didSet {
if url == nil {
cleanup(urls: urls)
}
}
}
public private(set) var urls: [URL] = []
public private(set) var isPreparing: Bool = false
public private(set) var latestError: Error?
public init() {}
public func prepareFor(urls: [URL], selectedURL: URL) async {
var transaction = Transaction(animation: .default)
transaction.disablesAnimations = true
withTransaction(transaction) {
isPreparing = true
}
do {
var order = 0
let pathOrderMap = urls.reduce(into: [String: Int]()) { result, url in
result[url.lastPathComponent] = order
order += 1
}
let paths: [URL] = try await withThrowingTaskGroup(of: URL.self, body: { group in
var paths: [URL] = []
for url in urls {
group.addTask {
try await self.localPathFor(url: url)
}
}
for try await path in group {
paths.append(path)
}
return paths.sorted { url1, url2 in
pathOrderMap[url1.lastPathComponent] ?? 0 < pathOrderMap[url2.lastPathComponent] ?? 0
}
})
withTransaction(transaction) {
self.urls = paths
url = paths.first(where: { $0.lastPathComponent == selectedURL.lastPathComponent })
isPreparing = false
}
} catch {
withTransaction(transaction) {
isPreparing = false
self.urls = []
url = nil
latestError = error
}
}
}
private var quickLookDir: URL {
try! FileManager.default.url(for: .cachesDirectory,
in: .userDomainMask,
appropriateFor: nil,
create: false)
.appending(component: "quicklook")
}
private func localPathFor(url: URL) async throws -> URL {
try? FileManager.default.createDirectory(at: quickLookDir, withIntermediateDirectories: true)
let path = quickLookDir.appendingPathComponent(url.lastPathComponent)
// Warning: Non-sendable type '(any URLSessionTaskDelegate)?' exiting main actor-isolated
// context in call to non-isolated instance method 'data(for:delegate:)' cannot cross actor
// boundary.
// This is on the defaulted-to-nil second parameter of `.data(from:delegate:)`.
// There is a Radar tracking this & others like it.
let data = try await URLSession.shared.data(from: url).0
try data.write(to: path)
return path
}
private func cleanup(urls _: [URL]) {
try? FileManager.default.removeItem(at: quickLookDir)
}
}