-
-
Notifications
You must be signed in to change notification settings - Fork 1.2k
/
FileProviderExtension.swift
277 lines (263 loc) · 12.8 KB
/
FileProviderExtension.swift
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
import FileProvider
import FileProviderService
private class Counter {
private let value = MutableAtomicObject<Int>(0)
func next() -> Int {
let newValue = value.mutate { oldValue in
return oldValue + 1
}
return newValue - 1
}
}
class FileProviderExtension: NSObject, NSFileProviderReplicatedExtension {
private let domain: NSFileProviderDomain
private let fetcher: FileProviderFetcher
private let creator: ItemCreator
private let modifier: ItemModifier
private let deleter: ItemDeleter
private let manager: NSFileProviderManager?
private let remoteService: RemoteService!
private let workingSet: WorkingSet
private let counter = Counter()
let xpcService: FileProviderService
required init(domain: NSFileProviderDomain) {
self.domain = domain
xpcService = FileProviderService()
remoteService = RemoteService(xpcService)
fetcher = FileProviderFetcher(domain: domain, remoteService: remoteService)
creator = ItemCreator(domain: domain, remoteService: remoteService)
modifier = ItemModifier(domain: domain, remoteService: remoteService)
deleter = ItemDeleter(domain: domain, remoteService: remoteService)
manager = NSFileProviderManager(for: domain)
workingSet = WorkingSet(remoteService: remoteService)
super.init()
}
func invalidate() {
log("Extension.invalidate()")
Task { await SyncCache.instance.invalidate() }
}
func item(for identifier: NSFileProviderItemIdentifier,
request: NSFileProviderRequest,
completionHandler: @escaping (NSFileProviderItem?, Error?) -> Void) -> Progress {
Task {
let reqnum = counter.next()
await logging("[reqnum:\(reqnum)] Extension.item(for: \(identifier.rawValue))") {
log("LIFECYCLE: Start")
do {
let entry = try await remoteFile(for: identifier)
log("Using remote file: \(entry)")
// Pass it along to the item
let item = await FileProviderItem(entry, manager: manager)
log("Return \(item.terseDescription)")
log("LIFECYCLE: Normal completion")
completionHandler(item, nil)
} catch {
log("Return error \(error)")
log("LIFECYCLE: Error completion")
completionHandler(nil, error)
}
}
}
return Progress()
}
private func remoteFile(for identifier: NSFileProviderItemIdentifier) async throws -> RemoteFile {
switch identifier {
case .rootContainer, .trashContainer:
log("Use root")
return RemoteFile.root
case .workingSet:
return RemoteFile.workingSet
default:
log("Looking up \(identifier.rawValue) from remote service")
let result = try await remoteService.lookup(identifier.rawValue)
log("Found \(result)")
return result
}
}
private func asyncItem(for itemIdentifier: NSFileProviderItemIdentifier,
request: NSFileProviderRequest) async throws -> NSFileProviderItem {
try await withCheckedThrowingContinuation { continuation in
_ = self.item(for: itemIdentifier, request: request) { maybeItem, maybeError in
if let justItem = maybeItem {
continuation.resume(with: .success(justItem))
return
}
if let justError = maybeError {
continuation.resume(throwing: justError)
}
}
}
}
func fetchContents(for itemIdentifier: NSFileProviderItemIdentifier,
version requestedVersion: NSFileProviderItemVersion?,
request: NSFileProviderRequest,
completionHandler: @escaping (URL?,
NSFileProviderItem?,
Error?) -> Void) -> Progress {
let progress = Progress()
Task {
let reqnum = counter.next()
await logging("[reqnum: \(reqnum)] Extension.fetchContents(for: \(itemIdentifier.description), version: \(requestedVersion.descriptionOrNil))") {
log("LIFECYCLE: Start")
log("Fetching item \(itemIdentifier.rawValue)")
do {
let item = try await asyncItem(for: itemIdentifier, request: request)
log("Fetched item \(item.terseDescription). Can now download its contents.")
if let size = item.documentSize??.intValue {
log("Set total unit count to \(size)")
progress.totalUnitCount = Int64(size)
progress.completedUnitCount = 0
}
let fetchRequest = FileProviderFetcher.FetchRequest(
itemIdentifier: itemIdentifier,
requestedVersion: requestedVersion,
request: request)
let tempURL = try await self.fetcher.fetchContents(fetchRequest,
progress: progress)
log("Fetch succeeded")
log("LIFECYCLE: Normal completion")
completionHandler(tempURL, item, nil)
} catch {
log("Failed to fetch \(itemIdentifier.rawValue): \(error)")
// TODO: Convert cocoa errors like:
// NSCocoaErrorDomain Code=4 "The file “fetch-44BF2850-96CC-4824-AD7E-0570A97A0022” doesn’t exist."
// To something NSFileProvider can understand.
log("LIFECYCLE: Error completion")
completionHandler(nil, nil, error)
}
}
}
return progress
}
func createItem(basedOn itemTemplate: NSFileProviderItem,
fields: NSFileProviderItemFields,
contents url: URL?,
options: NSFileProviderCreateItemOptions = [],
request: NSFileProviderRequest,
completionHandler: @escaping (NSFileProviderItem?,
NSFileProviderItemFields,
Bool,
Error?) -> Void) -> Progress {
let progress = Progress()
Task {
let reqnum = counter.next()
await logging("[reqnum: \(reqnum)] Extension.createItem(basedOn: \(itemTemplate.terseDescription), fields: \(fields.description), contents: \(url.descriptionOrNil), options: \(options.description))") {
log("LIFECYCLE: Start")
let request = ItemCreator.Request(itemTemplate: itemTemplate,
fields: fields,
contents: url,
options: options,
request: request)
do {
let item = try await creator.create(request)
log("Create succeded")
log("LIFECYCLE: Normal completion")
completionHandler(item.item, item.fields, false, nil)
} catch {
log("Create failed with \(error)")
log("LIFECYCLE: Error completion")
completionHandler(nil, [], false, error)
}
}
}
return progress
}
func modifyItem(_ item: NSFileProviderItem,
baseVersion version: NSFileProviderItemVersion,
changedFields: NSFileProviderItemFields,
contents newContents: URL?,
options: NSFileProviderModifyItemOptions = [],
request: NSFileProviderRequest,
completionHandler: @escaping (NSFileProviderItem?,
NSFileProviderItemFields,
Bool,
Error?) -> Void) -> Progress {
let modifyRequest = ItemModifier.Request(item: item,
version: version,
changedFields: changedFields,
contents: newContents,
options: options,
request: request)
Task {
let reqnum = counter.next()
await logging("[reqnum: \(reqnum)] Extension.modifyItem(\(item.terseDescription), baseVersion: \(version.description), changedFields: \(changedFields.description), contents: \(newContents?.path ?? "(nil)"), options: \(options.description))") {
log("LIFECYCLE: Start")
do {
let file = try await remoteFile(for: item.itemIdentifier)
let update = try await modifier.modify(file, request: modifyRequest)
log("Modify succeeded")
log("LIFECYCLE: Normal completion")
completionHandler(update.item, update.fields, update.shouldFetchContent, nil)
} catch {
log("Modify failed with \(error)")
log("LIFECYCLE: Error completion")
completionHandler(nil, [], true, error)
}
}
}
return modifyRequest.progress
}
func deleteItem(identifier: NSFileProviderItemIdentifier,
baseVersion version: NSFileProviderItemVersion,
options: NSFileProviderDeleteItemOptions = [],
request: NSFileProviderRequest,
completionHandler: @escaping (Error?) -> Void) -> Progress {
Task {
let reqnum = counter.next()
let request = ItemDeleter.Request(identifier: identifier,
version: version,
options: options,
request: request)
await logging("[reqnum: \(reqnum)] Extension.deleteItem(\(request))") {
log("LIFECYCLE: Start")
do {
let file = try await remoteFile(for: identifier)
try await deleter.delete(file, request: request)
log("Delete succeeded")
log("LIFECYCLE: Normal completion")
completionHandler(nil)
} catch {
log("Delete failed with error: \(error)")
log("LIFECYCLE: Error completion")
completionHandler(error)
}
}
}
return Progress()
}
func enumerator(for containerItemIdentifier: NSFileProviderItemIdentifier,
request: NSFileProviderRequest) throws -> NSFileProviderEnumerator {
let reqnum = counter.next()
return logging("[reqnum: \(reqnum)] Extension.enumerator(for: \(containerItemIdentifier.description))") {
log("LIFECYCLE: Start")
defer {
log("LIFECYCLE: Normal completion")
}
switch containerItemIdentifier {
case .workingSet:
return FileProviderEnumerator(RemoteFile.workingSetPrefix,
domain: domain,
remoteService: remoteService,
workingSet: workingSet)
case .rootContainer, .trashContainer:
log("Treat as root")
Task {
await workingSet.addFolder("/",
domain: domain)
}
return FileProviderEnumerator("/", domain: domain,
remoteService: remoteService,
workingSet: workingSet)
default:
let path = containerItemIdentifier.rawValue
Task {
await workingSet.addFolder(path,
domain: domain)
}
return FileProviderEnumerator(path, domain: domain,
remoteService: remoteService,
workingSet: workingSet)
}
}
}
}