If database empty, add releases feed

CHANGELOG.md

@@ -17,7 +17,7 @@ and this project does adhere to [Semantic Versioning](https://semver.org/spec/v2
 - *Settings, Feeds:* OPML export with selected items only
 - *UI:* Accessibility hints for most UI elements
 - *UI*: Show welcome message upon first usage (empty db)
-- *DB*: Table for options. E.g., with what version was the db last used
+- Welcome message also adds Github releases feed
 - Associate OPML files (double click and right click actions in Finder)
 - Quick Look preview for OPML files
 
@@ -37,6 +37,7 @@ and this project does adhere to [Semantic Versioning](https://semver.org/spec/v2
 - *Settings, Feeds:* Always append new items at the end
 - *Adding feed:* Display error reason if user cancels the creation of a new feed item
 - *Adding feed:* Refresh interval hotkeys set to: `⌘1` … `⌘6`
+- *DB*: New table for options. E.g., what app version modified the database
 
 
 ## [0.9.4] - 2019-04-02

baRSS/AppHook.m

@@ -51,11 +51,12 @@
 }
 
 - (void)applicationDidFinishLaunching:(NSNotification *)aNotification {
+	[_statusItem asyncReloadUnreadCount];
+	[FeedDownload registerNetworkChangeNotification]; // will call update scheduler
 	if ([StoreCoordinator isEmpty]) {
 		[_statusItem showWelcomeMessage];
+		[FeedDownload autoDownloadAndParseUpdateURL];
 	}
-	[FeedDownload registerNetworkChangeNotification]; // will call update scheduler
-	[_statusItem asyncReloadUnreadCount];
 }
 
 - (void)applicationWillTerminate:(NSNotification *)aNotification {
@@ -71,7 +72,7 @@
 		url = [url substringFromIndex:2];
 	}
 	if ([scheme isEqualToString:@"feed"]) {
-		[FeedDownload autoDownloadAndParseURL:url successBlock:nil];
+		[FeedDownload autoDownloadAndParseURL:url addAnyway:NO modify:nil];
 	}
 }
 

baRSS/Constants.h

@@ -30,6 +30,8 @@
 
 /// UTI type used for opml files
 static NSPasteboardType const UTI_OPML = @"org.opml";
+/// URL with newest baRSS releases. Automatically added when user starts baRSS for the first time.
+static NSString* const versionUpdateURL = @"https://github.com/relikd/baRSS/releases.atom";
 
 
 #pragma mark - NSImageName constants

baRSS/Helper/FeedDownload.h

@@ -39,7 +39,8 @@
 + (void)forceUpdateAllFeeds;
 // Downloading
 + (void)newFeed:(NSString *)urlStr askUser:(nonnull NSString*(^)(RSHTMLMetadata *meta))askUser block:(nonnull void(^)(RSParsedFeed *parsed, NSError *error, NSHTTPURLResponse *response))block;
-+ (void)autoDownloadAndParseURL:(NSString*)urlStr successBlock:(nullable os_block_t)block;
++ (void)autoDownloadAndParseURL:(NSString*)urlStr addAnyway:(BOOL)flag modify:(nullable void(^)(Feed *feed))block;
++ (void)autoDownloadAndParseUpdateURL;
 + (void)batchDownloadFeeds:(NSArray<Feed*> *)list favicons:(BOOL)fav showErrorAlert:(BOOL)alert finally:(nullable os_block_t)block;
 // Favicon image download
 + (void)downloadFavicon:(NSString*)urlStr finished:(void(^)(NSImage * _Nullable img))block;

baRSS/Helper/FeedDownload.m

@@ -26,6 +26,7 @@
 #import "Feed+Ext.h"
 #import "FeedMeta+Ext.h"
 #import "FeedGroup+Ext.h"
+#import "NSDate+Ext.h"
 
 #import <SystemConfiguration/SystemConfiguration.h>
 
@@ -342,24 +343,33 @@ static BOOL _nextUpdateIsForced = NO;
  Creates new @c FeedGroup, @c Feed, @c FeedMeta and @c FeedArticle instances and saves them to the persistent store.
  Update duration is set to the default of 30 minutes.
  */
-+ (void)autoDownloadAndParseURL:(NSString*)url successBlock:(nullable os_block_t)block {
++ (void)autoDownloadAndParseURL:(NSString*)url addAnyway:(BOOL)flag modify:(nullable void(^)(Feed *feed))block {
 	NSManagedObjectContext *moc = [StoreCoordinator createChildContext];
 	Feed *f = [Feed appendToRootWithDefaultIntervalInContext:moc];
 	f.meta.url = url;
-	[self backgroundUpdateBoth:f favicon:YES alert:YES finally:^(BOOL successful){
-		if (!successful) {
+	[self backgroundUpdateBoth:f favicon:YES alert:!flag finally:^(BOOL successful){
+		if (!flag && !successful) {
 			[moc deleteObject:f.group];
+		} else if (block) {
+			block(f); // only on success
 		}
 		[StoreCoordinator saveContext:moc andParent:YES];
 		[moc reset];
 		if (successful) {
 			PostNotification(kNotificationGroupInserted, f.group.objectID);
 			[self scheduleUpdateForUpcomingFeeds];
-			if (block) block();
 		}
 	}];
 }
 
+/// Insert Github URL for version releases with update interval 2 days and rename @c FeedGroup item.
++ (void)autoDownloadAndParseUpdateURL {
+	[self autoDownloadAndParseURL:versionUpdateURL addAnyway:YES modify:^(Feed *feed) {
+		feed.group.name = NSLocalizedString(@"baRSS releases", nil);
+		[feed.meta setRefreshAndSchedule:2 * TimeUnitDays];
+	}];
+}
+
 /**
  Start download of feed xml, then continue with favicon download (optional).
  

baRSS/Info.plist

@@ -60,7 +60,7 @@
 		</dict>
 	</array>
 	<key>CFBundleVersion</key>
-	<string>10158</string>
+	<string>10180</string>
 	<key>LSApplicationCategoryType</key>
 	<string>public.app-category.news</string>
 	<key>LSMinimumSystemVersion</key>