Handle failure to load store.

MasterPassword/ObjC/MPAppDelegate_Shared.h

@@ -22,5 +22,6 @@
 - (MPUserEntity *)activeUserForMainThread;
 - (MPUserEntity *)activeUserInContext:(NSManagedObjectContext *)context;
 - (void)setActiveUser:(MPUserEntity *)activeUser;
+- (void)handleCoordinatorError:(NSError *)error;
 
 @end

MasterPassword/ObjC/MPAppDelegate_Shared.m

@@ -57,4 +57,8 @@
     self.activeUserOID = activeUser.objectID;
 }
 
+- (void)handleCoordinatorError:(NSError *)error {
+
+}
+
 @end

MasterPassword/ObjC/MPAppDelegate_Store.h

@@ -27,6 +27,7 @@ typedef NS_ENUM( NSUInteger, MPImportResult ) {
 + (BOOL)managedObjectContextPerformBlockAndWait:(void (^)(NSManagedObjectContext *context))mocBlock;
 
 - (MPFixableResult)findAndFixInconsistenciesSaveInContext:(NSManagedObjectContext *)context;
+- (void)deleteAndResetStore;
 
 /** @param completion The block to execute after adding the site, executed from the main thread with the new site in the main MOC. */
 - (void)addSiteNamed:(NSString *)siteName completion:(void ( ^ )(MPSiteEntity *site, NSManagedObjectContext *context))completion;

MasterPassword/ObjC/MPAppDelegate_Store.m

@@ -157,12 +157,16 @@ PearlAssociatedObjectProperty( NSManagedObjectContext*, MainManagedObjectContext
             err( @"Couldn't create our application support directory: %@", [error fullDescription] );
             return;
         }
-        [self.persistentStoreCoordinator addPersistentStoreWithType:NSSQLiteStoreType configuration:nil URL:localStoreURL
+        if (![self.persistentStoreCoordinator addPersistentStoreWithType:NSSQLiteStoreType configuration:nil URL:[self localStoreURL]
                                                                  options:@{
                                                                          NSMigratePersistentStoresAutomaticallyOption : @YES,
                                                                          NSInferMappingModelAutomaticallyOption       : @YES,
                                                                          STORE_OPTIONS
-                                                            } error:&error];
+                                                                 } error:&error]) {
+            err( @"Failed to open store: %@", error );
+            [self handleCoordinatorError:error];
+            return;
+        }
 
         // Create our contexts and observer.
         self.privateManagedObjectContext = [[NSManagedObjectContext alloc] initWithConcurrencyType:NSPrivateQueueConcurrencyType];
@@ -210,6 +214,33 @@ PearlAssociatedObjectProperty( NSManagedObjectContext*, MainManagedObjectContext
     }
 }
 
+- (void)deleteAndResetStore {
+
+    @synchronized (self) {
+        // Unregister any existing observers and contexts.
+        if (self.saveObserver)
+            [[NSNotificationCenter defaultCenter] removeObserver:self.saveObserver];
+        [self.mainManagedObjectContext performBlockAndWait:^{
+            [self.mainManagedObjectContext reset];
+            self.mainManagedObjectContext = nil;
+        }];
+        [self.privateManagedObjectContext performBlockAndWait:^{
+            [self.privateManagedObjectContext reset];
+            self.privateManagedObjectContext = nil;
+        }];
+        NSError *error = nil;
+        for (NSPersistentStore *store in self.persistentStoreCoordinator.persistentStores) {
+            if (![self.persistentStoreCoordinator removePersistentStore:store error:&error])
+                err( @"Couldn't remove persistence store from coordinator: %@", error );
+        }
+        self.persistentStoreCoordinator = nil;
+        if (![[NSFileManager defaultManager] removeItemAtURL:self.localStoreURL error:&error])
+            err( @"Couldn't remove persistence store at URL %@: %@", self.localStoreURL, error );
+
+        [self loadStore];
+    }
+}
+
 - (MPFixableResult)findAndFixInconsistenciesSaveInContext:(NSManagedObjectContext *)context {
 
     NSError *error = nil;

MasterPassword/ObjC/iOS/MPiOSAppDelegate.m

@@ -341,6 +341,26 @@
             showComposerForVC:viewController];
 }
 
+- (void)handleCoordinatorError:(NSError *)error {
+
+    static dispatch_once_t once = 0;
+    dispatch_once( &once, ^{
+        [PearlAlert showAlertWithTitle:@"Failed To Load Sites" message:
+                        @"Master Password was unable to open your sites history.\n"
+                                @"This may be due to corruption.  You can either reset Master Password and "
+                                @"recreate your user, or E-Mail us your logs and leave your corrupt store as-is for now."
+                             viewStyle:UIAlertViewStyleDefault initAlert:nil
+                     tappedButtonBlock:^(UIAlertView *alert, NSInteger buttonIndex) {
+                         if (buttonIndex == [alert cancelButtonIndex])
+                             return;
+                         if (buttonIndex == [alert firstOtherButtonIndex])
+                             [self openFeedbackWithLogs:YES forVC:nil];
+                         if (buttonIndex == [alert firstOtherButtonIndex] + 1)
+                             [self deleteAndResetStore];
+                     } cancelTitle:@"Ignore" otherTitles:@"E-Mail Logs", @"Reset", nil];
+    } );
+}
+
 - (void)showExportForVC:(UIViewController *)viewController {
 
     [PearlAlert showAlertWithTitle:@"Exporting Your Sites"