Add error handling/message for url handler

src/core/player.cpp

@@ -235,6 +235,12 @@ void Player::HandleLoadResult(const UrlHandler::LoadResult &result) {
   if (item->Url() != result.original_url_) return;
 
   switch (result.type_) {
+    case UrlHandler::LoadResult::Error:
+      loading_async_ = QUrl();
+      EngineStateChanged(Engine::Error);
+      FatalError();
+      emit Error(result.error_);
+      break;
     case UrlHandler::LoadResult::NoMoreTracks:
       qLog(Debug) << "URL handler for" << result.original_url_ << "said no more tracks";
 
@@ -703,13 +709,17 @@ void Player::TrackAboutToEnd() {
   if (url_handlers_.contains(url.scheme()) && !(engine_->type() == Engine::Deezer && url.scheme() == "dzmedia")) {
     UrlHandler::LoadResult result = url_handlers_[url.scheme()]->LoadNext(url);
     switch (result.type_) {
+      case UrlHandler::LoadResult::Error:
+        loading_async_ = QUrl();
+        EngineStateChanged(Engine::Error);
+        FatalError();
+        emit Error(result.error_);
+        return;
       case UrlHandler::LoadResult::NoMoreTracks:
         return;
-
       case UrlHandler::LoadResult::WillLoadAsynchronously:
         loading_async_ = url;
         return;
-
       case UrlHandler::LoadResult::TrackAvailable:
         url = result.media_url_;
         break;

src/core/urlhandler.cpp

@@ -28,6 +28,6 @@
 #include "song.h"
 #include "urlhandler.h"
 
-UrlHandler::LoadResult::LoadResult(const QUrl &original_url, Type type, const QUrl &media_url, const Song::FileType &filetype, qint64 length_nanosec) : original_url_(original_url), type_(type), media_url_(media_url), filetype_(filetype), length_nanosec_(length_nanosec) {}
+UrlHandler::LoadResult::LoadResult(const QUrl &original_url, Type type, const QUrl &media_url, const Song::FileType &filetype, const qint64 length_nanosec, const QString error) : original_url_(original_url), type_(type), media_url_(media_url), filetype_(filetype), length_nanosec_(length_nanosec), error_(error) {}
 
 UrlHandler::UrlHandler(QObject *parent) : QObject(parent) {}

src/core/urlhandler.h

@@ -52,9 +52,12 @@ class UrlHandler : public QObject {
 
       // There was a track available.  Its url is in media_url.
       TrackAvailable,
+
+      // There was a error
+      Error,
     };
 
-    LoadResult(const QUrl &original_url = QUrl(), Type type = NoMoreTracks, const QUrl &media_url = QUrl(), const Song::FileType &filetype = Song::FileType_Stream, qint64 length_nanosec_ = -1);
+    LoadResult(const QUrl &original_url = QUrl(), Type type = NoMoreTracks, const QUrl &media_url = QUrl(), const Song::FileType &filetype = Song::FileType_Stream, const qint64 length_nanosec_ = -1, const QString error = QString());
 
     // The url that the playlist item has in Url().
     // Might be something unplayable like lastfm://...
@@ -70,6 +73,9 @@ class UrlHandler : public QObject {
 
     // Track length, if we are able to get it only now
     qint64 length_nanosec_;
+
+    // Error message, if any
+    QString error_;
   };
 
   // Called by the Player when a song starts loading - gives the handler a chance to do something clever to get a playable track.