Expose all picoFeed errors to the Frontend when adding a subscription

controllers/feed.php

@@ -159,17 +159,50 @@ Router\action('subscribe', function() {
     }
 
     $values += array('url' => trim($url), 'download_content' => 0, 'rtl' => 0, 'cloak_referrer' => 0);
-    $feed_id = Model\Feed\create($values['url'], $values['download_content'], $values['rtl'], $values['cloak_referrer']);
 
-    if ($feed_id > 0) {
+    try {
+        $feed_id = Model\Feed\create($values['url'], $values['download_content'], $values['rtl'], $values['cloak_referrer']);
+    }
+    catch (UnexpectedValueException $e) {
+        $error_message = t('This subscription already exists.');
+    }
+    catch (PicoFeed\Client\InvalidCertificateException $e) {
+        $error_message = t('Invalid SSL certificate.');
+    }
+    catch (PicoFeed\Client\InvalidUrlException $e) {
+        // picoFeed uses this exception for multiple reasons, but doesn't
+        // provide an exception code to distinguish what exactly happend here
+        $error_message = $e->getMessage();
+    }
+    catch (PicoFeed\Client\MaxRedirectException $e) {
+        $error_message = t('Maximum number of HTTP redirections exceeded.');
+    }
+    catch (PicoFeed\Client\MaxSizeException $e) {
+        $error_message = t('The content size exceeds to maximum allowed size.');
+    }
+    catch (PicoFeed\Client\TimeoutException $e) {
+        $error_message = t('Connection timeout.');
+    }
+    catch (PicoFeed\Parser\MalformedXmlException $e) {
+        $error_message = t('Feed is malformed.');
+    }
+    catch (PicoFeed\Reader\SubscriptionNotFoundException $e) {
+        $error_message = t('Unable to find a subscription.');
+    }
+    catch (PicoFeed\Reader\UnsupportedFeedFormatException $e) {
+        $error_message = t('Unable to detect the feed format.');
+    }
+
+    if (isset($feed_id) && $feed_id !== false) {
         Session\flash(t('Subscription added successfully.'));
         Response\redirect('?action=feed-items&feed_id='.$feed_id);
     }
-    else if ($feed_id === -2) {
-        Session\flash_error(t('This subscription already exists.'));
-    }
     else {
-        Session\flash_error(t('Unable to find a subscription.'));
+        if (! isset($error_message)) {
+            $error_message = t('Error occured.');
+        }
+
+        Session\flash_error($error_message);
     }
 
     Response\html(Template\layout('add', array(

jsonrpc.php

@@ -3,6 +3,7 @@
 require __DIR__.'/common.php';
 
 use JsonRPC\Server;
+use PicoFeed\PicoFeedException;
 
 $server = new Server;
 $server->authentication(array(
@@ -24,7 +25,16 @@ $server->register('feed.info', function ($feed_id) {
 // Add a new feed
 $server->register('feed.create', function($url) {
 
+    try {
         $result = Model\Feed\create($url);
+    }
+    catch (PicoFeedException $e) {
+        $result = false;
+    }
+    catch (UnexpectedValueException $e) {
+        $result = false;
+    }
+
     Model\Config\write_debug();
 
     return $result;

locales/ar_AR/translations.php

@@ -231,4 +231,11 @@ return array(
     'Original link marks article as read' => 'تحويل العنوان إلى مقروء بمجرد النقر على الرابط الأصلي للعنوان',
     'Cloak the image referrer' => 'Cloak the image referrer',
     // 'This subscription already exists.' => '',
+    // 'Connection timeout.' => '',
+    // 'Error occured.' => '',
+    // 'Feed is malformed.' => '',
+    // 'Invalid SSL certificate.' => '',
+    // 'Maximum number of HTTP redirections exceeded.' => '',
+    // 'The content size exceeds to maximum allowed size.' => '',
+    // 'Unable to detect the feed format.' => '',
 );

locales/cs_CZ/translations.php

@@ -231,4 +231,11 @@ return array(
     'Original link marks article as read' => 'Původní odkaz označí článek za přečtený',
     'Cloak the image referrer' => 'Zamaskovat původce obrázků',
     // 'This subscription already exists.' => '',
+    // 'Connection timeout.' => '',
+    // 'Error occured.' => '',
+    // 'Feed is malformed.' => '',
+    // 'Invalid SSL certificate.' => '',
+    // 'Maximum number of HTTP redirections exceeded.' => '',
+    // 'The content size exceeds to maximum allowed size.' => '',
+    // 'Unable to detect the feed format.' => '',
 );

locales/de_DE/translations.php

@@ -231,4 +231,11 @@ return array(
     // 'Original link marks article as read' => '',
     // 'Cloak the image referrer' => '',
     // 'This subscription already exists.' => '',
+    // 'Connection timeout.' => '',
+    // 'Error occured.' => '',
+    // 'Feed is malformed.' => '',
+    // 'Invalid SSL certificate.' => '',
+    // 'Maximum number of HTTP redirections exceeded.' => '',
+    // 'The content size exceeds to maximum allowed size.' => '',
+    // 'Unable to detect the feed format.' => '',
 );

locales/es_ES/translations.php

@@ -231,4 +231,11 @@ return array(
     'Original link marks article as read' => 'Link original marca artículo cómo leído',
     // 'Cloak the image referrer' => '',
     // 'This subscription already exists.' => '',
+    // 'Connection timeout.' => '',
+    // 'Error occured.' => '',
+    // 'Feed is malformed.' => '',
+    // 'Invalid SSL certificate.' => '',
+    // 'Maximum number of HTTP redirections exceeded.' => '',
+    // 'The content size exceeds to maximum allowed size.' => '',
+    // 'Unable to detect the feed format.' => '',
 );

locales/fr_FR/translations.php

@@ -231,4 +231,11 @@ return array(
     'Original link marks article as read' => 'Marquer les articles comme lu lors d\'un clic sur le lien original',
     'Cloak the image referrer' => 'Falsifier le référent pour les images',
     'This subscription already exists.' => 'Cet abonnement existe déjà.',
+    'Connection timeout.' => 'Connection timeout.',
+    'Error occured.' => 'Error occured.',
+    'Feed is malformed.' => 'Feed is malformed.',
+    'Invalid SSL certificate.' => 'Invalid SSL certificate.',
+    'Maximum number of HTTP redirections exceeded.' => 'Maximum number of HTTP redirections exceeded.',
+    'The content size exceeds to maximum allowed size.' => 'The content size exceeds to maximum allowed size.',
+    'Unable to detect the feed format.' => 'Unable to detect the feed format.',
 );

locales/it_IT/translations.php

@@ -231,4 +231,11 @@ return array(
     // 'Original link marks article as read' => '',
     // 'Cloak the image referrer' => '',
     // 'This subscription already exists.' => '',
+    // 'Connection timeout.' => '',
+    // 'Error occured.' => '',
+    // 'Feed is malformed.' => '',
+    // 'Invalid SSL certificate.' => '',
+    // 'Maximum number of HTTP redirections exceeded.' => '',
+    // 'The content size exceeds to maximum allowed size.' => '',
+    // 'Unable to detect the feed format.' => '',
 );

locales/pt_BR/translations.php

@@ -231,4 +231,11 @@ return array(
     // 'Original link marks article as read' => '',
     // 'Cloak the image referrer' => '',
     // 'This subscription already exists.' => '',
+    // 'Connection timeout.' => '',
+    // 'Error occured.' => '',
+    // 'Feed is malformed.' => '',
+    // 'Invalid SSL certificate.' => '',
+    // 'Maximum number of HTTP redirections exceeded.' => '',
+    // 'The content size exceeds to maximum allowed size.' => '',
+    // 'Unable to detect the feed format.' => '',
 );

locales/sr_RS/translations.php

@@ -231,4 +231,11 @@ return array(
     'Original link marks article as read' => 'Клик на оригиналну везу обележава чланак прочитаним',
     'Cloak the image referrer' => 'Прикривај рефератора слика',
     // 'This subscription already exists.' => '',
+    // 'Connection timeout.' => '',
+    // 'Error occured.' => '',
+    // 'Feed is malformed.' => '',
+    // 'Invalid SSL certificate.' => '',
+    // 'Maximum number of HTTP redirections exceeded.' => '',
+    // 'The content size exceeds to maximum allowed size.' => '',
+    // 'Unable to detect the feed format.' => '',
 );

locales/sr_RS@latin/translations.php

@@ -231,4 +231,11 @@ return array(
     'Original link marks article as read' => 'Klik na originalnu vezu obeležava članak pročitanim',
     'Cloak the image referrer' => 'Prikrivaj referatora slika',
     // 'This subscription already exists.' => '',
+    // 'Connection timeout.' => '',
+    // 'Error occured.' => '',
+    // 'Feed is malformed.' => '',
+    // 'Invalid SSL certificate.' => '',
+    // 'Maximum number of HTTP redirections exceeded.' => '',
+    // 'The content size exceeds to maximum allowed size.' => '',
+    // 'Unable to detect the feed format.' => '',
 );

locales/zh_CN/translations.php

@@ -231,4 +231,11 @@ return array(
     // 'Original link marks article as read' => '',
     // 'Cloak the image referrer' => '',
     // 'This subscription already exists.' => '',
+    // 'Connection timeout.' => '',
+    // 'Error occured.' => '',
+    // 'Feed is malformed.' => '',
+    // 'Invalid SSL certificate.' => '',
+    // 'Maximum number of HTTP redirections exceeded.' => '',
+    // 'The content size exceeds to maximum allowed size.' => '',
+    // 'Unable to detect the feed format.' => '',
 );

models/feed.php

@@ -151,7 +151,8 @@ function import_opml($content)
 // Add a new feed from an URL
 function create($url, $enable_grabber = false, $force_rtl = false, $cloak_referrer = false)
 {
-    try {
+    $feed_id = false;
+
     $db = Database::get('db');
 
     // Discover the feed
@@ -160,7 +161,7 @@ function create($url, $enable_grabber = false, $force_rtl = false, $cloak_referr
 
     // Feed already there
     if ($db->table('feeds')->eq('feed_url', $resource->getUrl())->count()) {
-            return -2;
+        throw new \UnexpectedValueException;
     }
 
     // Parse the feed
@@ -190,21 +191,15 @@ function create($url, $enable_grabber = false, $force_rtl = false, $cloak_referr
     ));
 
     if ($result) {
-
         $feed_id = $db->getConnection()->getLastId();
 
         Item\update_all($feed_id, $feed->getItems());
         fetch_favicon($feed_id, $feed->getSiteUrl(), $feed->getIcon());
+    }
 
     Config\write_debug();
 
-            return (int) $feed_id;
+    return $feed_id;
-        }
-    }
-    catch (PicoFeedException $e) {}
-
-    Config\write_debug();
-    return -1;
 }
 
 // Refresh all feeds