Display status messages for failed app launch

Limelight/Network/HttpManager.h

@@ -11,6 +11,7 @@
 @interface HttpManager : NSObject <NSURLConnectionDelegate, NSURLConnectionDataDelegate>
 
 + (NSString*) getStringFromXML:(NSData*)xml tag:(NSString*)tag;
++ (NSString*) getStatusStringFromXML:(NSData*)xml;
 
 - (id) initWithHost:(NSString*) host uniqueId:(NSString*) uniqueId deviceName:(NSString*) deviceName cert:(NSData*) cert;
 - (NSURLRequest*) newPairRequest:(NSData*)salt;

Limelight/Network/HttpManager.m

@@ -25,6 +25,24 @@
 
 static const NSString* PORT = @"47984";
 
++ (NSString*) getStatusStringFromXML:(NSData*)xml {
+    xmlDocPtr docPtr = xmlParseMemory([xml bytes], (int)[xml length]);
+    
+    if (docPtr == NULL) {
+        NSLog(@"ERROR: An error occured trying to parse xml.");
+        return NULL;
+    }
+    
+    NSString* string;
+    xmlNodePtr rootNode = xmlDocGetRootElement(docPtr);
+    
+    string = [HttpManager getStatusMessage: rootNode];
+    xmlFree(rootNode);
+    xmlFree(docPtr);
+    
+    return string;
+}
+
 + (NSString*) getStringFromXML:(NSData*)xml tag:(NSString*)tag {
     xmlDocPtr docPtr = xmlParseMemory([xml bytes], (int)[xml length]);
     
@@ -60,6 +78,13 @@ static const NSString* PORT = @"47984";
     
     return value;
 }
+    
++ (NSString*) getStatusMessage:(xmlNodePtr)docRoot {
+    xmlChar* statusMsgXml = xmlGetProp(docRoot, (const xmlChar*)"status_message");
+    NSString* statusMsg = [NSString stringWithUTF8String:(const char*)statusMsgXml];
+    xmlFree(statusMsgXml);
+    return statusMsg;
+}
 
 + (bool) verifyStatus:(xmlNodePtr)docRoot {
     xmlChar* statusStr = xmlGetProp(docRoot, (const xmlChar*)"status_code");

Limelight/Stream/Connection.h

@@ -17,7 +17,7 @@
 - (void) stageStarting:(char*)stageName;
 - (void) stageComplete:(char*)stageName;
 - (void) stageFailed:(char*)stageName withError:(long)errorCode;
-- (void) launchFailed;
+- (void) launchFailed:(NSString*)message;
 - (void) displayMessage:(char*)message;
 - (void) displayTransientMessage:(char*)message;
 

Limelight/Stream/StreamManager.m

@@ -43,27 +43,25 @@
     NSString* currentGame = [HttpManager getStringFromXML:serverInfoResp tag:@"currentgame"];
     NSString* pairStatus = [HttpManager getStringFromXML:serverInfoResp tag:@"PairStatus"];
     if (currentGame == NULL || pairStatus == NULL) {
-        [_callbacks launchFailed];
+        [_callbacks launchFailed:@"Failed to connect to PC"];
         return;
     }
     
     if (![pairStatus isEqualToString:@"1"]) {
         // Not paired
-        // TODO: Display better error message
-        [_callbacks launchFailed];
+        [_callbacks launchFailed:@"Device not paired to PC"];
         return;
     }
     
+    // resumeApp and launchApp handle calling launchFailed
     if (![currentGame isEqualToString:@"0"]) {
         // App already running, resume it
         if (![self resumeApp:hMan]) {
-            [_callbacks launchFailed];
             return;
         }
     } else {
         // Start app
         if (![self launchApp:hMan]) {
-            [_callbacks launchFailed];
             return;
         }
     }
@@ -88,7 +86,11 @@
                                            rikey:[Utils bytesToHex:_config.riKey]
                                          rikeyid:_config.riKeyId]];
     NSString *gameSession = [HttpManager getStringFromXML:launchResp tag:@"gamesession"];
-    if (gameSession == NULL || [gameSession isEqualToString:@"0"]) {
+    if (launchResp == NULL) {
+        [_callbacks launchFailed:@"Failed to launch app"];
+        return FALSE;
+    } else if (gameSession == NULL || [gameSession isEqualToString:@"0"]) {
+        [_callbacks launchFailed:[HttpManager getStatusStringFromXML:launchResp]];
         return FALSE;
     }
     
@@ -100,7 +102,11 @@
                           [hMan newResumeRequestWithRiKey:[Utils bytesToHex:_config.riKey]
                                                   riKeyId:_config.riKeyId]];
     NSString *resume = [HttpManager getStringFromXML:resumeResp tag:@"resume"];
-    if (resume == NULL || [resume isEqualToString:@"0"]) {
+    if (resumeResp == NULL) {
+        [_callbacks launchFailed:@"Failed to resume app"];
+        return FALSE;
+    } else if (resume == NULL || [resume isEqualToString:@"0"]) {
+        [_callbacks launchFailed:[HttpManager getStatusStringFromXML:resumeResp]];
         return FALSE;
     }
     

Limelight/ViewControllers/StreamFrameViewController.m

@@ -91,9 +91,9 @@
     [self presentViewController:alert animated:YES completion:nil];
 }
 
-- (void) launchFailed {
+- (void) launchFailed:(NSString*)message {
     UIAlertController* alert = [UIAlertController alertControllerWithTitle:@"Connection Failed"
-                                                                   message:@"Failed to start app"
+                                                                   message:message
                                                             preferredStyle:UIAlertControllerStyleAlert];
     [alert addAction:[UIAlertAction actionWithTitle:@"Ok" style:UIAlertActionStyleDestructive handler:^(UIAlertAction* action){
         [self performSegueWithIdentifier:@"returnToMainFrame" sender:self];