Merge lp:~karni/telegram-app/telegram-app-db-upgrade-support into lp:telegram-app/app

[Michał Karnicki]

Support for db upgrades.

[Roberto Mier Escandon (rmescandon)]

review: Approve

=== modified file 'telegram.qml'
--- telegram.qml	2014-08-21 14:49:21 +0000
+++ telegram.qml	2014-08-22 15:52:35 +0000
@@ -136,6 +136,13 @@
     }
 
     Settings {
+        id: appConfig
+        category: "config"
+
+        property int databaseVersion: 0
+    }
+
+    Settings {
         // TODO Update Qt.application.domain to fix this path:
         // ~/.config/qt-project.org/com.ubuntu.telegram.conf
         id: sessionSettings
@@ -157,6 +164,12 @@
         id: telegramClient
         configPath: "~/.config/" + applicationName
         publicKeyFile: "telegram.pub"
+        databaseVersion: appConfig.databaseVersion
+
+        onDatabaseVersion: {
+            console.log("Upgraded db to version " + databaseVersion);
+            appConfig.databaseVersion = databaseVersion;
+        }
 
         onError: {
             // TODO Replace these with constants.