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Some improvement to observing user changes.

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This commit is contained in:
Maarten Billemont
2017-04-29 15:01:24 -04:00
parent ea5be8efcb
commit fcaa5d1d8c
4 changed files with 78 additions and 57 deletions
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47
platform-darwin/Source/MPAppDelegate_Store.m
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@@ -131,6 +131,25 @@ PearlAssociatedObjectProperty( NSNumber*, StoreCorrupted, storeCorrupted );
return YES;
}
+ (id)managedObjectContextChanged:(void ( ^ )(NSDictionary<NSManagedObjectID *, NSString *> *affectedObjects))changedBlock {
NSManagedObjectContext *privateManagedObjectContextIfReady = [[self get] privateManagedObjectContextIfReady];
if (!privateManagedObjectContextIfReady)
return nil;
return PearlAddNotificationObserver( NSManagedObjectContextObjectsDidChangeNotification, privateManagedObjectContextIfReady, nil,
^(id host, NSNotification *note) {
NSMutableDictionary *affectedObjects = [NSMutableDictionary new];
for (NSManagedObject *object in note.userInfo[NSInsertedObjectsKey])
affectedObjects[object.objectID] = NSInsertedObjectsKey;
for (NSManagedObject *object in note.userInfo[NSUpdatedObjectsKey])
affectedObjects[object.objectID] = NSUpdatedObjectsKey;
for (NSManagedObject *object in note.userInfo[NSDeletedObjectsKey])
affectedObjects[object.objectID] = NSDeletedObjectsKey;
changedBlock( affectedObjects );
} );
}
- (NSManagedObjectContext *)mainManagedObjectContextIfReady {
[self loadStore];
@@ -196,19 +215,21 @@ PearlAssociatedObjectProperty( NSNumber*, StoreCorrupted, storeCorrupted );
self.mainManagedObjectContext = [[NSManagedObjectContext alloc] initWithConcurrencyType:NSMainQueueConcurrencyType];
self.mainManagedObjectContext.parentContext = self.privateManagedObjectContext;
// When privateManagedObjectContext is saved, import the changes into mainManagedObjectContext.
PearlAddNotificationObserverTo( self.mainManagedObjectContext, NSManagedObjectContextDidSaveNotification,
self.privateManagedObjectContext, nil, ^(NSManagedObjectContext *mainManagedObjectContext, NSNotification *note) {
[mainManagedObjectContext performBlock:^{
@try {
[mainManagedObjectContext mergeChangesFromContextDidSaveNotification:note];
}
@catch (NSException *exception) {
err( @"While merging changes:\n%@", [exception fullDescription] );
}
}];
} );
if ([self.mainManagedObjectContext respondsToSelector:@selector( automaticallyMergesChangesFromParent )]) // iOS 10+
self.mainManagedObjectContext.automaticallyMergesChangesFromParent = YES;
else
// When privateManagedObjectContext is saved, import the changes into mainManagedObjectContext.
PearlAddNotificationObserverTo( self.mainManagedObjectContext, NSManagedObjectContextDidSaveNotification,
self.privateManagedObjectContext, nil, ^(NSManagedObjectContext *mainContext, NSNotification *note) {
[mainContext performBlock:^{
@try {
[mainContext mergeChangesFromContextDidSaveNotification:note];
}
@catch (NSException *exception) {
err( @"While merging changes:\n%@", [exception fullDescription] );
}
}];
} );
// Create a new store coordinator.