[rygel] tracker: A map from UPnP to tracker properties

[Zeeshan Ali Khattak <zeeshanak src gnome org>]

commit 55dac54bef37e2fd0f8d724677e0dbf174c3b59e
Author: Sunil Mohan Adapa <sunil medhas org>
Date:   Tue Dec 7 23:11:17 2010 +0530

    tracker: A map from UPnP to tracker properties
    
    A global map that can be used to convert UPnP properties to tracker
    property key chains. This shall be used later to generate a selection
    query in a generic manner.
    
    Co-author: Zeeshan Ali (Khattak) <zeeshanak gnome org>

 src/plugins/tracker/Makefile.am                    |    1 +
 .../tracker/rygel-tracker-key-chain-map.vala       |   91 ++++++++++++++++++++
 2 files changed, 92 insertions(+), 0 deletions(-)
---
diff --git a/src/plugins/tracker/Makefile.am b/src/plugins/tracker/Makefile.am
index b626df8..693a5c6 100644
--- a/src/plugins/tracker/Makefile.am
+++ b/src/plugins/tracker/Makefile.am
@@ -26,6 +26,7 @@ librygel_media_tracker_la_SOURCES = rygel-tracker-root-container.vala \
 				    rygel-tracker-new.vala \
 				    rygel-tracker-search-container.vala \
 				    rygel-tracker-category-all-container.vala \
+				    rygel-tracker-key-chain-map.vala \
 				    rygel-tracker-query.vala \
 				    rygel-tracker-selection-query.vala \
 				    rygel-tracker-deletion-query.vala \
diff --git a/src/plugins/tracker/rygel-tracker-key-chain-map.vala b/src/plugins/tracker/rygel-tracker-key-chain-map.vala
new file mode 100644
index 0000000..9e5a5b2
--- /dev/null
+++ b/src/plugins/tracker/rygel-tracker-key-chain-map.vala
@@ -0,0 +1,91 @@
+/*
+ * Copyright (C) 2010 MediaNet Inh.
+ *
+ * Author: Sunil Mohan Adapa <sunil medhas org>
+ *
+ * This file is part of Rygel.
+ *
+ * Rygel is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * Rygel is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ */
+
+using Gee;
+
+/**
+ * A map of upnp properties to tracker property key chains
+ */
+public class Rygel.Tracker.KeyChainMap : HashMap<string, ArrayList<string>> {
+    private static KeyChainMap key_chain_map;
+
+    public static KeyChainMap get_key_chain_map () {
+        if (unlikely (key_chain_map == null)) {
+            key_chain_map = new KeyChainMap ();
+        }
+
+        return key_chain_map;
+    }
+
+    private KeyChainMap () {
+        // Item
+        add_key_chain ("res", "nie:url");
+        add_key_chain ("fileName", "nfo:fileName");
+        add_key_chain ("dc:title", "nie:title");
+        add_key_chain ("dlnaProfile", "nmm:dlnaProfile");
+        add_key_chain ("mimeType", "nie:mimeType");
+        add_key_chain ("res size", "nfo:fileSize");
+        add_key_chain ("date", "nie:contentCreated");
+
+        // Music Item
+        add_key_chain ("res duration", "nfo:duration");
+        add_key_chain ("upnp:artist", "nmm:performer", "nmm:artistName");
+        add_key_chain ("dc:creator", "nmm:performer", "nmm:artistName");
+        add_key_chain ("upnp:album", "nmm:musicAlbum", "nmm:albumTitle");
+        add_key_chain ("upnp:originalTrackNumber", "nmm:trackNumber");
+        add_key_chain ("upnp:genre", "nfo:genre");
+        add_key_chain ("sampleRate", "nfo:sampleRate");
+        add_key_chain ("upnp:nrAudioChannels", "nfo:channels");
+        add_key_chain ("upnp:bitsPerSample", "nfo:bitsPerSample");
+        add_key_chain ("upnp:bitrate", "nfo:averageBitrate");
+
+        // Picture & Video Items
+        add_key_chain ("width", "nfo:width");
+        add_key_chain ("height", "nfo:height");
+    }
+
+    public string map_property (string property) {
+        var str = SelectionQuery.ITEM_VARIABLE;
+
+        foreach (var key in this[property]) {
+            str = key + "(" + str + ")";
+        }
+
+        return str;
+    }
+
+    private void add_key_chain (string property, ...) {
+        var key_chain = new ArrayList<string> ();
+
+        var list = va_list ();
+        string key = list.arg ();
+
+        while (key != null) {
+            key_chain.add (key);
+
+            key = list.arg ();
+        }
+
+        this[property] = key_chain;
+    }
+}
+