NSError: inCaseLog + inCasePresent

baRSS/AppHook.m

@@ -30,6 +30,7 @@
 #import "StoreCoordinator.h"
 #import "SettingsFeeds+DragDrop.h"
 #import "NSURL+Ext.h"
+#import "NSError+Ext.h"
 
 @interface AppHook()
 @property (strong) NSWindowController *prefWindow;
@@ -119,10 +120,8 @@
 		if (_persistentContainer == nil) {
 			_persistentContainer = [[NSPersistentContainer alloc] initWithName:@"DBv1"];
 			[_persistentContainer loadPersistentStoresWithCompletionHandler:^(NSPersistentStoreDescription *storeDescription, NSError *error) {
-				if (error != nil) {
-					NSLog(@"Couldn't read NSPersistentContainer: %@, %@", error, error.userInfo);
+				if ([error inCaseLog:"Couldn't read NSPersistentContainer"])
 					abort();
-				}
 			}];
 		}
 	}
@@ -133,7 +132,7 @@
 - (NSApplicationTerminateReply)applicationShouldTerminate:(NSApplication *)sender {
 	NSManagedObjectContext *context = self.persistentContainer.viewContext;
 	if (![context commitEditing]) {
-		NSLog(@"%@:%@ unable to commit editing to terminate", [self class], NSStringFromSelector(_cmd));
+		NSLogCaller(@"unable to commit editing to terminate");
 		return NSTerminateCancel;
 	}
 	if (!context.hasChanges) {

baRSS/Core Data/NSFetchRequest+Ext.m

@@ -21,6 +21,7 @@
 //  SOFTWARE.
 
 #import "NSFetchRequest+Ext.h"
+#import "NSError+Ext.h"
 
 @implementation NSFetchRequest (Ext)
 
@@ -28,7 +29,7 @@
 - (NSArray*)fetchAllRows:(NSManagedObjectContext*)moc {
 	NSError *err;
 	NSArray *fetchResults = [moc executeFetchRequest:self error:&err];
-	if (err) NSLog(@"ERROR: Fetch request failed: %@", err);
+	[err inCaseLog:"Fetch request failed"];
 	//NSLog(@"%@ ==> %@", self, fetchResults); // debugging
 	return fetchResults;
 }

baRSS/Core Data/StoreCoordinator.m

@@ -26,6 +26,7 @@
 #import "FaviconDownload.h"
 #import "Feed+Ext.h"
 #import "NSURL+Ext.h"
+#import "NSError+Ext.h"
 #import "NSFetchRequest+Ext.h"
 
 @implementation StoreCoordinator
@@ -52,18 +53,13 @@
  @param flag If @c YES save any parent context as well (recursive).
  */
 + (void)saveContext:(NSManagedObjectContext*)context andParent:(BOOL)flag {
-	// Performs the save action for the application, which is to send the save: message to the application's managed object context. Any encountered errors are presented to the user.
-	if (![context commitEditing]) {
-		NSLog(@"%@:%@ unable to commit editing before saving", [self class], NSStringFromSelector(_cmd));
-	}
+	if (![context commitEditing])
+		NSLogCaller(@"unable to commit editing before saving");
 	NSError *error = nil;
-	if (context.hasChanges && ![context save:&error]) {
-		// Customize this code block to include application-specific recovery steps.
-		[NSApp presentError:error];
-	}
-	if (flag && context.parentContext) {
+	if (context.hasChanges && ![context save:&error])
+		[error inCasePresent:NSApp];
+	if (flag && context.parentContext)
 		[self saveContext:context.parentContext andParent:flag];
-	}
 }
 
 
@@ -284,7 +280,7 @@
 	bdr.resultType = NSBatchDeleteResultTypeCount;
 	NSError *err;
 	NSBatchDeleteResult *res = [moc executeRequest:bdr error:&err];
-	if (err) NSLog(@"%@", err);
+	[err inCaseLog:"Couldn't delete batch"];
 	return [res.result unsignedIntegerValue];
 }
 

baRSS/Feed Import/OpmlFile.m

@@ -28,6 +28,7 @@
 #import "Constants.h"
 #import "NSDate+Ext.h"
 #import "NSView+Ext.h"
+#import "NSError+Ext.h"
 
 #pragma mark - Helper
 
@@ -98,9 +99,7 @@ static NSInteger RadioGroupSelection(NSView *view) {
 		RSXMLData *xml = [[RSXMLData alloc] initWithData:data url:url];
 		RSOPMLParser *parser = [RSOPMLParser parserWithXMLData:xml];
 		[parser parseAsync:^(RSOPMLItem * _Nullable doc, NSError * _Nullable error) {
-			if (error) {
-				[NSApp presentError:error];
-			} else {
+			if (![error inCasePresent:NSApp]) {
 				for (RSOPMLItem *itm in doc.children) {
 					block(itm);
 				}
@@ -250,7 +249,7 @@ static NSInteger RadioGroupSelection(NSView *view) {
 		NSData *xml = [doc XMLDataWithOptions:NSXMLNodePreserveAttributeOrder | NSXMLNodePrettyPrint];
 		[xml writeToURL:url options:NSDataWritingAtomic error:&error];
 	}
-	if (error) [NSApp presentError:error];
+	[error inCasePresent:NSApp];
 	return error;
 }
 

baRSS/Info.plist

@@ -70,7 +70,7 @@
 		</dict>
 	</array>
 	<key>CFBundleVersion</key>
-	<string>13404</string>
+	<string>13435</string>
 	<key>LSApplicationCategoryType</key>
 	<string>public.app-category.news</string>
 	<key>LSMinimumSystemVersion</key>

baRSS/NSCategories/NSError+Ext.h

@@ -22,9 +22,15 @@
 
 @import Cocoa;
 
+/// Log error message and prepend calling class and calling method.
+#define NSLogCaller(desc) { NSLog(@"%@:%@ %@", [self class], NSStringFromSelector(_cmd), desc); }
+
 @interface NSError (Ext)
 // Generators
 + (instancetype)statusCode:(NSInteger)code reason:(nullable NSString*)reason;
 + (instancetype)canceledByUser;
 + (instancetype)feedURLNotFound:(NSURL*)url;
+// User notification
+- (BOOL)inCaseLog:(nullable const char*)title;
+- (BOOL)inCasePresent:(NSApplication*)app;
 @end

baRSS/NSCategories/NSError+Ext.m

@@ -126,4 +126,21 @@ static const char* CodeDescription(NSInteger code) {
 	return RSXMLMakeErrorWrongParser(RSXMLErrorExpectingFeed, RSXMLErrorExpectingHTML, url);
 }
 
+//  ---------------------------------------------------------------
+// |  MARK: - User notification
+//  ---------------------------------------------------------------
+
+/// Will only execute and return @c YES if @c error @c != @c nil . Log error message to console.
+- (BOOL)inCaseLog:(nullable const char*)title {
+	if (title) printf("ERROR %s: %s, %s\n", title, self.description.UTF8String, self.userInfo.description.UTF8String);
+	else       printf("%s, %s\n", self.description.UTF8String, self.userInfo.description.UTF8String);
+	return YES;
+}
+
+/// Will only execute and return @c YES if @c error @c != @c nil . Present application modal error message.
+- (BOOL)inCasePresent:(NSApplication*)app {
+	[app presentError:self];
+	return YES;
+}
+
 @end

baRSS/NSCategories/NSURL+Ext.m

@@ -22,6 +22,7 @@
 
 #import "NSURL+Ext.h"
 #import "UserPrefs.h" // appName in +faviconsCacheURL
+#import "NSError+Ext.h"
 
 @implementation NSURL (Ext)
 
@@ -50,9 +51,8 @@
 - (BOOL)mkdir {
 	if ([self existsAndIsDir:YES]) return NO;
 	NSError *err;
-	BOOL b = [[NSFileManager defaultManager] createDirectoryAtURL:self withIntermediateDirectories:YES attributes:nil error:&err];
-	if (err) [NSApp presentError:err];
-	return b;
+	[[NSFileManager defaultManager] createDirectoryAtURL:self withIntermediateDirectories:YES attributes:nil error:&err];
+	return ![err inCasePresent:NSApp];
 }
 
 /// Delete file or folder at URL. If item does not exist, this method does nothing.

baRSS/Preferences/Feeds Tab/SettingsFeeds.m

@@ -27,6 +27,7 @@
 #import "FeedGroup+Ext.h"
 #import "UpdateScheduler.h"
 #import "SettingsFeedsView.h"
+#import "NSError+Ext.h"
 
 @interface SettingsFeeds ()
 @property (strong) SettingsFeedsView *view; // override super
@@ -100,7 +101,7 @@
 	
 	NSError *error;
 	[self.dataStore fetchWithRequest:nil merge:NO error:&error];
-	if (error) [NSApp presentError:error];
+	[error inCasePresent:NSApp];
 }
 
 /**