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Using NSFileCoordinator to manage file access in presentedItemDidChange

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michael starke
2017-08-29 15:59:53 +02:00
parent 0166c183c7
commit 258f165cee
1 changed files with 69 additions and 58 deletions
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127
MacPass/MPDocument.m
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@@ -39,6 +39,7 @@
#import "NSError+Messages.h"
#import "NSString+MPPasswordCreation.h"
#import "NSString+MPHash.h"
#import "NSApplication+MPAdditions.h"
NSString *const MPDocumentDidAddGroupNotification = @"com.hicknhack.macpass.MPDocumentDidAddGroupNotification";
NSString *const MPDocumentDidAddEntryNotification = @"com.hicknhack.macpass.MPDocumentDidAddEntryNotification";
@@ -264,66 +265,70 @@ NSString *const MPDocumentGroupKey = @"MPDocumentGrou
}
- (void)presentedItemDidChange {
[super presentedItemDidChange];
/* If we are locked we have the data written back to file - just revert */
if(self.encrypted) {
[self revertDocumentToSaved:nil];
return;
}
NSDictionary *attributes = [[NSFileManager defaultManager] attributesOfItemAtPath:self.fileURL.path error:nil];
NSDate *modificationDate = attributes[NSFileModificationDate];
if(NSOrderedSame == [self.fileModificationDate compare:modificationDate]) {
return; // Just metadata has changed
}
NSFileCoordinator *coordinator = [[NSFileCoordinator alloc] initWithFilePresenter:self];
if(self.lockedForFileChange) {
return; // We are already displaying an alert
}
/* Set the flag in this call! */
self.lockedForFileChange = YES;
/* TODO read file to check if changes took place! */
/* Dispatch the alert to the main queue */
__weak MPDocument *welf = self;
dispatch_async(dispatch_get_main_queue(), ^{
MPFileChangeStrategy strategy = (MPFileChangeStrategy)[NSUserDefaults.standardUserDefaults integerForKey:kMPSettingsKeyFileChangeStrategy];
if(strategy != MPFileChangeStrategyAsk) {
[welf _handleFileChangeWithStrategy:strategy setAsDefault:NO];
self.lockedForFileChange = NO;
return;
[coordinator coordinateReadingItemAtURL:self.fileURL options:NSFileCoordinatorReadingWithoutChanges error:nil byAccessor:^(NSURL * _Nonnull newURL) {
NSDictionary *attributes = [NSFileManager.defaultManager attributesOfItemAtPath:newURL.path error:nil];
if(NSOrderedSame == [attributes.fileModificationDate compare:self.fileModificationDate]) {
return; // no content change
}
NSAlert *alert = [[NSAlert alloc] init];
alert.alertStyle = NSWarningAlertStyle;
alert.messageText = NSLocalizedString(@"FILE_CHANGED_BY_OTHERS_MESSAGE_TEXT", @"Message displayed when an open file was changed from another application");
alert.informativeText = NSLocalizedString(@"FILE_CHANGED_BY_OTHERS_INFO_TEXT", @"Informative text displayed when the file was change from another application");
alert.showsSuppressionButton = YES;
alert.suppressionButton.title = NSLocalizedString(@"SET_AS_DEFAULT_FILE_CHANGE_STRATEGY", @"Set the selection as default file change strategy!");
[alert addButtonWithTitle:NSLocalizedString(@"FILE_CHANGE_STRATEGY_MERGE", @"Merge changes into file!")];
[alert addButtonWithTitle:NSLocalizedString(@"FILE_CHANGE_STRATEGY_USE_OTHER", @"Reopen the file!")];
[alert addButtonWithTitle:NSLocalizedString(@"FILE_CHANGE_STRATEGY_KEEP_MINE", @"Ignore the changes to an open file!")];
[alert beginSheetModalForWindow:welf.windowForSheet completionHandler:^(NSModalResponse returnCode) {
BOOL useAsDefault = (alert.suppressionButton.state == NSOnState);
switch(returnCode) {
case NSAlertFirstButtonReturn: {
[welf _handleFileChangeWithStrategy:MPFileChangeStrategyMerge setAsDefault:useAsDefault];
break;
}
case NSAlertSecondButtonReturn:
[welf _handleFileChangeWithStrategy:MPFileChangeStrategyUseOther setAsDefault:useAsDefault];
break;
case NSAlertThirdButtonReturn:
[welf _handleFileChangeWithStrategy:MPFileChangeStrategyKeepMine setAsDefault:useAsDefault];
default:
break;
if(self.encrypted) {
__weak MPDocument *welf = self;
dispatch_async(dispatch_get_main_queue(), ^{
[welf _handleFileChangeWithStrategy:MPFileChangeStrategyUseOther setAsDefault:NO];
});
return; // Done!
}
if(self.lockedForFileChange) {
return; // We are already displaying an alert
}
/* Set the flag in this call! */
self.lockedForFileChange = YES;
/* Dispatch the alert to the main queue */
__weak MPDocument *welf = self;
dispatch_async(dispatch_get_main_queue(), ^{
MPFileChangeStrategy strategy = (MPFileChangeStrategy)[NSUserDefaults.standardUserDefaults integerForKey:kMPSettingsKeyFileChangeStrategy];
if(strategy != MPFileChangeStrategyAsk) {
[welf _handleFileChangeWithStrategy:strategy setAsDefault:NO];
self.lockedForFileChange = NO;
return;
}
welf.lockedForFileChange = NO;
}];
});
NSAlert *alert = [[NSAlert alloc] init];
alert.alertStyle = NSWarningAlertStyle;
alert.messageText = NSLocalizedString(@"FILE_CHANGED_BY_OTHERS_MESSAGE_TEXT", @"Message displayed when an open file was changed from another application");
alert.informativeText = NSLocalizedString(@"FILE_CHANGED_BY_OTHERS_INFO_TEXT", @"Informative text displayed when the file was change from another application");
alert.showsSuppressionButton = YES;
alert.suppressionButton.title = NSLocalizedString(@"SET_AS_DEFAULT_FILE_CHANGE_STRATEGY", @"Set the selection as default file change strategy!");
[alert addButtonWithTitle:NSLocalizedString(@"FILE_CHANGE_STRATEGY_MERGE", @"Merge changes into file!")];
[alert addButtonWithTitle:NSLocalizedString(@"FILE_CHANGE_STRATEGY_USE_OTHER", @"Reopen the file!")];
[alert addButtonWithTitle:NSLocalizedString(@"FILE_CHANGE_STRATEGY_KEEP_MINE", @"Ignore the changes to an open file!")];
[alert beginSheetModalForWindow:welf.windowForSheet completionHandler:^(NSModalResponse returnCode) {
BOOL useAsDefault = (alert.suppressionButton.state == NSOnState);
switch(returnCode) {
case NSAlertFirstButtonReturn: {
[welf _handleFileChangeWithStrategy:MPFileChangeStrategyMerge setAsDefault:useAsDefault];
break;
}
case NSAlertSecondButtonReturn:
[welf _handleFileChangeWithStrategy:MPFileChangeStrategyUseOther setAsDefault:useAsDefault];
break;
case NSAlertThirdButtonReturn:
[welf _handleFileChangeWithStrategy:MPFileChangeStrategyKeepMine setAsDefault:useAsDefault];
default:
break;
}
welf.lockedForFileChange = NO;
}];
});
}];
}
- (void)_handleFileChangeWithStrategy:(MPFileChangeStrategy)strategy setAsDefault:(BOOL)setAsDefault {
NSAssert(NSThread.currentThread.isMainThread, @"Invoke only on main thread!");
if(setAsDefault) {
[NSUserDefaults.standardUserDefaults setInteger:strategy forKey:kMPSettingsKeyFileChangeStrategy];
}
@@ -366,6 +371,12 @@ NSString *const MPDocumentGroupKey = @"MPDocumentGrou
}
else {
[self.tree syncronizeWithTree:otherTree options:KPKSynchronizationSynchronizeOption];
NSUserNotification *notification = [[NSUserNotification alloc] init];
notification.title = NSApp.applicationName;
notification.informativeText = NSLocalizedString(@"AUTO_MERGE_NOTIFICATION_TEXT", @"");
notification.deliveryDate = NSDate.date;
[NSUserNotificationCenter.defaultUserNotificationCenter scheduleNotification:notification];
}
}
@@ -403,7 +414,7 @@ NSString *const MPDocumentGroupKey = @"MPDocumentGrou
}
self.tree = nil;
self.compositeKey = nil;
[[NSNotificationCenter defaultCenter] postNotificationName:MPDocumentDidLockDatabaseNotification object:self];
[NSNotificationCenter.defaultCenter postNotificationName:MPDocumentDidLockDatabaseNotification object:self];
}
@@ -417,7 +428,7 @@ NSString *const MPDocumentGroupKey = @"MPDocumentGrou
/* only clear the data if we actually do not need it anymore */
self.encryptedData = nil;
self.unlockCount += 1;
[[NSNotificationCenter defaultCenter] postNotificationName:MPDocumentDidUnlockDatabaseNotification object:self];
[NSNotificationCenter.defaultCenter postNotificationName:MPDocumentDidUnlockDatabaseNotification object:self];
[self _storeKeyURL:keyFileURL];
}
else {
@@ -452,7 +463,7 @@ NSString *const MPDocumentGroupKey = @"MPDocumentGrou
if(!delegate.isAllowedToStoreKeyFile) {
return nil;
}
NSDictionary *keysForFiles = [[NSUserDefaults standardUserDefaults] dictionaryForKey:kMPSettingsKeyRememeberdKeysForDatabases];
NSDictionary *keysForFiles = [NSUserDefaults.standardUserDefaults dictionaryForKey:kMPSettingsKeyRememeberdKeysForDatabases];
NSString *keyPath = keysForFiles[self.fileURL.path.sha1HexDigest];
if(!keyPath) {
return nil;
@@ -823,7 +834,7 @@ NSString *const MPDocumentGroupKey = @"MPDocumentGrou
break;
case MPActionPerformAutotypeForSelectedEntry:
valid &= (nil != targetEntry);
break;
break;
default:
break;
}