Add Firefox bookmarks.json format to libbookmarks

- can only read folders and bookmarks, their title and uri fields

Not supported by Bookmark Model:
- Separator items
- Date added and Date modified fields

5 files changed, 75 insertions, 4 deletions

diff --git a/lib/bookmarks/bookmarkformat.cpp b/lib/bookmarks/bookmarkformat.cpp
index e6149cd..87b816c 100644
--- a/lib/bookmarks/bookmarkformat.cpp
+++ b/lib/bookmarks/bookmarkformat.cpp
@@ -8,19 +8,24 @@
 
 #include "bookmarkformat.h"
 #include "formats/xbel.h"
+#include "formats/ffjson.h"
 #include <QIODevice>
 
 template<>
 void BookmarkFormat<BookmarkFormats::XbelFormat>::read(BookmarkItem *root) const
 {
-    Q_CHECK_PTR(m_device);
     Xbel::read(m_device, root);
 }
 
 template<>
 void BookmarkFormat<BookmarkFormats::XbelFormat>::write(BookmarkItem *root)
 {
-    Q_CHECK_PTR(m_device);
     Xbel::write(m_device, root);
 }
 
+template<>
+void BookmarkFormat<BookmarkFormats::FirefoxJsonFormat>::read(BookmarkItem *root) const
+{
+    FFJson::read(m_device, root);
+}
+
diff --git a/lib/bookmarks/bookmarkformat.h b/lib/bookmarks/bookmarkformat.h
index 673acbd..5cd1860 100644
--- a/lib/bookmarks/bookmarkformat.h
+++ b/lib/bookmarks/bookmarkformat.h
@@ -14,7 +14,8 @@
 class QIODevice;
 
 enum BookmarkFormats {
-    XbelFormat
+    XbelFormat,
+    FirefoxJsonFormat
 };
 
 template<BookmarkFormats format>
@@ -23,6 +24,7 @@ class BookmarkFormat
 public:
     explicit BookmarkFormat(QIODevice *device)
     {
+        Q_CHECK_PTR(m_device);
         m_device = device;
     }
     ~BookmarkFormat()
diff --git a/lib/bookmarks/formats/ffjson.cpp b/lib/bookmarks/formats/ffjson.cpp
new file mode 100644
index 0000000..f173904
--- /dev/null
+++ b/lib/bookmarks/formats/ffjson.cpp
@@ -0,0 +1,45 @@
+/*
+ * This file is part of smolbote. It's copyrighted by the contributors recorded
+ * in the version control history of the file, available from its original
+ * location: https://neueland.iserlohn-fortress.net/gitea/aqua/smolbote
+ *
+ * SPDX-License-Identifier: GPL-3.0
+ */
+
+#include "ffjson.h"
+#include "bookmarkitem.h"
+#include <QJsonDocument>
+#include <QJsonObject>
+#include <QJsonArray>
+#include <QDebug>
+
+void readChildElements(const QJsonObject &object, BookmarkItem *item)
+{
+    for(const auto c : object["children"].toArray()) {
+        const auto child = c.toObject();
+        const auto type = child["type"].toString();
+
+        if(type == "text/x-moz-place-container") {
+            auto *childItem = new BookmarkItem({}, BookmarkItem::Folder, item);
+            childItem->setExpanded(true);
+            childItem->setData(BookmarkItem::Title, child["title"].toString());
+            item->appendChild(childItem);
+            readChildElements(child, childItem);
+
+        } else if(type == "text/x-moz-place") {
+            auto *childItem = new BookmarkItem({}, BookmarkItem::Bookmark, item);
+            childItem->setData(BookmarkItem::Title, child["title"].toString());
+            childItem->setData(BookmarkItem::Href, child["uri"].toString());
+            item->appendChild(childItem);
+
+        } else {
+            qDebug() << "!!! unknown type " << qUtf8Printable(type);
+        }
+    }
+}
+
+void FFJson::read(QIODevice *device, BookmarkItem *item)
+{
+    const auto doc = QJsonDocument::fromJson(device->readAll());
+    readChildElements(doc.object(), item);
+}
diff --git a/lib/bookmarks/formats/ffjson.h b/lib/bookmarks/formats/ffjson.h
new file mode 100644
index 0000000..cc6ac24
--- /dev/null
+++ b/lib/bookmarks/formats/ffjson.h
@@ -0,0 +1,19 @@
+/*
+ * This file is part of smolbote. It's copyrighted by the contributors recorded
+ * in the version control history of the file, available from its original
+ * location: https://neueland.iserlohn-fortress.net/gitea/aqua/smolbote
+ *
+ * SPDX-License-Identifier: GPL-3.0
+ */
+
+#ifndef FFJSON_H
+#define FFJSON_H
+
+class QIODevice;
+class BookmarkItem;
+namespace FFJson
+{
+void read(QIODevice *device, BookmarkItem *item);
+}
+
+#endif // FFJSON_H
diff --git a/lib/bookmarks/meson.build b/lib/bookmarks/meson.build
index a7f603b..81c1ece 100644
--- a/lib/bookmarks/meson.build
+++ b/lib/bookmarks/meson.build
@@ -5,7 +5,7 @@ bookmarks_moc = mod_qt5.preprocess(
 
 bookmarks_lib = static_library('bookmarks', 
     [ bookmarks_moc,
-    'bookmarkformat.cpp', 'formats/xbel.cpp',
+    'bookmarkformat.cpp', 'formats/xbel.cpp', 'formats/ffjson.cpp',
     'bookmarkitem.cpp', 'bookmarkmodel.cpp' ],
     dependencies: dep_qt5
 )