From b8ea078fcf8897fae6e74cfacddcf72a0c1392a4 Mon Sep 17 00:00:00 2001
From: Tobias Fella <fella@posteo.de>
Date: Fri, 4 Sep 2020 16:52:32 +0200
Subject: [PATCH] Implement feed export to opml

---
 src/database.cpp         | 35 ++++++++++++++++++++++++++++++-----
 src/database.h           |  3 ++-
 src/qml/FeedListPage.qml | 18 ++++++++++++++++--
 3 files changed, 48 insertions(+), 8 deletions(-)

diff --git a/src/database.cpp b/src/database.cpp
index 605e2d4d..8ab3ff05 100644
--- a/src/database.cpp
+++ b/src/database.cpp
@@ -11,6 +11,7 @@
 #include <QStandardPaths>
 #include <QUrl>
 #include <QXmlStreamReader>
+#include <QXmlStreamWriter>
 
 #include "alligatorsettings.h"
 #include "database.h"
@@ -156,13 +157,12 @@ void Database::addFeed(QString url)
     Fetcher::instance().fetch(urlFromInput.toString());
 }
 
-void Database::importFeedsFromUrl(QString url)
+void Database::importFeeds(QString path)
 {
-    QFile *file = new QFile(QUrl(url).toLocalFile());
-    file->open(QIODevice::ReadOnly);
+    QFile file(QUrl(path).toLocalFile());
+    file.open(QIODevice::ReadOnly);
 
-    QXmlStreamReader xmlReader;
-    xmlReader.setDevice(file);
+    QXmlStreamReader xmlReader(&file);
     while(!xmlReader.atEnd()) {
         xmlReader.readNext();
         if(xmlReader.tokenType() == 4 &&  xmlReader.attributes().hasAttribute(QStringLiteral("xmlUrl"))) {
@@ -171,3 +171,28 @@ void Database::importFeedsFromUrl(QString url)
     }
     Fetcher::instance().fetchAll();
 }
+
+void Database::exportFeeds(QString path)
+{
+    QFile file(QUrl(path).toLocalFile());
+    file.open(QIODevice::WriteOnly);
+    QXmlStreamWriter xmlWriter(&file);
+    xmlWriter.setAutoFormatting(true);
+    xmlWriter.writeStartDocument(QStringLiteral("1.0"));
+    xmlWriter.writeStartElement(QStringLiteral("opml"));
+    xmlWriter.writeEmptyElement(QStringLiteral("head"));
+    xmlWriter.writeStartElement(QStringLiteral("body"));
+    xmlWriter.writeAttribute(QStringLiteral("version"), QStringLiteral("1.0"));
+    QSqlQuery query;
+    query.prepare(QStringLiteral("SELECT url, name FROM Feeds;"));
+    execute(query);
+    while(query.next()) {
+        xmlWriter.writeEmptyElement(QStringLiteral("outline"));
+        xmlWriter.writeAttribute(QStringLiteral("xmlUrl"), query.value(0).toString());
+        xmlWriter.writeAttribute(QStringLiteral("title"), query.value(1).toString());
+    }
+    xmlWriter.writeEndElement();
+    xmlWriter.writeEndElement();
+    xmlWriter.writeEndDocument();
+
+}
diff --git a/src/database.h b/src/database.h
index 047a0de2..7c0cfd7b 100644
--- a/src/database.h
+++ b/src/database.h
@@ -21,7 +21,8 @@ public:
     bool execute(QSqlQuery &query);
     bool execute(QString query);
     Q_INVOKABLE void addFeed(QString url);
-    Q_INVOKABLE void importFeedsFromUrl(QString url);
+    Q_INVOKABLE void importFeeds(QString path);
+    Q_INVOKABLE void exportFeeds(QString path);
 
 Q_SIGNALS:
     void feedAdded(QString url);
diff --git a/src/qml/FeedListPage.qml b/src/qml/FeedListPage.qml
index cf5e27c2..d80f7dae 100644
--- a/src/qml/FeedListPage.qml
+++ b/src/qml/FeedListPage.qml
@@ -36,6 +36,11 @@ Kirigami.ScrollablePage {
             text: i18n("Import Feeds...")
             iconName: "document-import"
             onTriggered: importDialog.open()
+        },
+        Kirigami.Action {
+            text: i18n("Export Feeds...")
+            iconName: "document-export"
+            onTriggered: exportDialog.open()
         }
     ]
 
@@ -75,7 +80,16 @@ Kirigami.ScrollablePage {
         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)
+        nameFilters: [i18n("All Files (*)"), i18n("XML Files (*.xml)"), i18n("OPML Files (*.opml)")]
+        onAccepted: Database.importFeeds(file)
+    }
+
+    FileDialog {
+        id: exportDialog
+        title: i18n("Export Feeds")
+        folder: StandardPaths.writableLocation(StandardPaths.HomeLocation)
+        nameFilters: [i18n("All Files")]
+        onAccepted: Database.exportFeeds(file)
+        fileMode: FileDialog.SaveFile
     }
 }