Implement feed import from opml

src/database.cpp

@@ -9,6 +9,8 @@
 #include <QSqlDatabase>
 #include <QSqlError>
 #include <QStandardPaths>
+#include <QUrl>
+#include <QXmlStreamReader>
 
 #include "alligatorsettings.h"
 #include "database.h"
@@ -153,3 +155,19 @@ void Database::addFeed(QString url)
 
     Fetcher::instance().fetch(urlFromInput.toString());
 }
+
+void Database::importFeedsFromUrl(QString url)
+{
+    QFile *file = new QFile(QUrl(url).toLocalFile());
+    file->open(QIODevice::ReadOnly);
+
+    QXmlStreamReader xmlReader;
+    xmlReader.setDevice(file);
+    while(!xmlReader.atEnd()) {
+        xmlReader.readNext();
+        if(xmlReader.tokenType() == 4 &&  xmlReader.attributes().hasAttribute(QStringLiteral("xmlUrl"))) {
+            addFeed(xmlReader.attributes().value(QStringLiteral("xmlUrl")).toString());
+        }
+    }
+    Fetcher::instance().fetchAll();
+}

src/database.h

@@ -21,6 +21,7 @@ public:
     bool execute(QSqlQuery &query);
     bool execute(QString query);
     Q_INVOKABLE void addFeed(QString url);
+    Q_INVOKABLE void importFeedsFromUrl(QString url);
 
 Q_SIGNALS:
     void feedAdded(QString url);

src/qml/FeedListPage.qml

@@ -6,6 +6,7 @@
 
 import QtQuick 2.14
 import QtQuick.Controls 2.14 as Controls
+import Qt.labs.platform 1.1
 import QtQuick.Layouts 1.14
 
 import org.kde.kirigami 2.12 as Kirigami
@@ -30,6 +31,11 @@ Kirigami.ScrollablePage {
             iconName: "view-refresh"
             onTriggered: refreshing = true
             visible: !Kirigami.Settings.isMobile
+        },
+        Kirigami.Action {
+            text: i18n("Import Feeds...")
+            iconName: "document-import"
+            onTriggered: importDialog.open()
         }
     ]
 
@@ -64,4 +70,12 @@ Kirigami.ScrollablePage {
 
         delegate: FeedListDelegate { }
     }
+
+    FileDialog {
+        id: importDialog
+        title: i18n("Import Feeds")
+        folder: StandardPaths.writableLocation(StandardPaths.HomeLocation)
+        nameFilters: [i18n("All Files (*.*)"), i18n("XML Files (*.xml)"), i18n("OPML Files (*.opml)")]
+        onAccepted: Database.importFeedsFromUrl(file)
+    }
 }