Implemented MusicBrainz lookup

Wow, what a convoluted api, to say the least...
They have documentation, which is good, but the query syntax definitely
needs more explaining, foremost how to encode non-ASCII characters and
names with whitspaces...

Well, it kinda works, but the Other Albums sections can be waaaaay
off...

1 files changed, 49 insertions, 0 deletions

diff --git a/webdownloader.cpp b/webdownloader.cpp
new file mode 100644
index 0000000..8035fe1
--- /dev/null
+++ b/webdownloader.cpp
@@ -0,0 +1,49 @@
+#include <QNetworkReply>
+#include <QNetworkRequest>
+#include <QJsonDocument>
+#include <QJsonObject>
+#include <QJsonArray>
+
+#include "webdownloader.h"
+
+WebDownloader::WebDownloader(QObject *parent) : QObject(parent) {
+    mAccessMgr = new QNetworkAccessManager(this);
+    connect(mAccessMgr, &QNetworkAccessManager::finished, this, &WebDownloader::dlFinished);
+}
+
+void WebDownloader::fetchData(QString artist, QString album){
+    mArtist = artist;
+    mAlbum = album;
+    QString artistQ = QString("artist:\"%1\"").arg(artist);
+    QByteArray peq = QUrl::toPercentEncoding(artistQ);
+    QString url = QString("https://musicbrainz.org/ws/2/release/?query=%1&fmt=json&limit=100").arg(QString(peq));
+    QUrl aUrl(url);
+    QNetworkRequest req(aUrl);
+    req.setHeader(QNetworkRequest::UserAgentHeader, "Beetplayer/1.0.0 (beetplayer@d-tor.org");
+    mAccessMgr->get(req);
+}
+
+void WebDownloader::dlFinished(QNetworkReply *reply){
+    mData.clear();
+    mOtherData.clear();
+    QByteArray res = reply->readAll();
+    QJsonParseError err;
+    QJsonDocument jDoc = QJsonDocument::fromJson(res, &err);
+    QJsonObject docObj = jDoc.object();
+    QJsonArray relArr = docObj.value("releases").toArray();
+    for(QJsonArray::const_iterator it = relArr.constBegin(); it != relArr.constEnd(); ++it){
+        QJsonValue v = *it;
+        QString title = v.toObject().value("title").toString().toLower();
+        QString curId = v.toObject().value("release-group").toObject().value("id").toString();
+        qDebug() << mAlbum << title;
+        if(mAlbum == title){
+            if(!mData.contains(curId)){
+                mData << curId;
+            }
+        }else{
+            mOtherData.insert(title, curId);
+        }
+    }
+    reply->deleteLater();
+    emit done();
+}