Save new repo data at end of update

Saves the new data for the repo at the end of the update process to enable the user to re-trigger the update in case the update exited prematurely.
Fixes #84.

src/org/fdroid/fdroid/UpdateService.java

@@ -327,6 +327,7 @@ public class UpdateService extends IntentService implements ProgressListener {
             List<Repo> unchangedRepos = new ArrayList<Repo>();
             List<Repo> updatedRepos = new ArrayList<Repo>();
             List<Repo> disabledRepos = new ArrayList<Repo>();
+            List<RepoUpdater.RepoUpdateRememberer> repoUpdateRememberers = new ArrayList<RepoUpdater.RepoUpdateRememberer>();
             boolean changes = false;
             for (Repo repo : repos) {
 
@@ -350,6 +351,7 @@ public class UpdateService extends IntentService implements ProgressListener {
                         apksToUpdate.addAll(updater.getApks());
                         updatedRepos.add(repo);
                         changes = true;
+                        repoUpdateRememberers.add(updater.getRememberer());
                     } else {
                         unchangedRepos.add(repo);
                     }
@@ -389,6 +391,11 @@ public class UpdateService extends IntentService implements ProgressListener {
 
                 notifyContentProviders();
 
+                //we only remember the update if everything has gone well
+                for (RepoUpdater.RepoUpdateRememberer rememberer : repoUpdateRememberers) {
+                    rememberer.rememberUpdate();
+                }
+
                 if (prefs.getBoolean(Preferences.PREF_UPD_NOTIFY, true)) {
                     performUpdateNotification(appsToUpdate.values());
                 }

src/org/fdroid/fdroid/updater/RepoUpdater.java

@@ -49,6 +49,7 @@ abstract public class RepoUpdater {
     protected final Repo repo;
     private List<App> apps = new ArrayList<App>();
     private List<Apk> apks = new ArrayList<Apk>();
+    private RepoUpdateRememberer rememberer = null;
     protected boolean usePubkeyInJar = false;
     protected boolean hasChanged = false;
     protected ProgressListener progressListener;
@@ -170,7 +171,11 @@ abstract public class RepoUpdater {
                 reader.parse(is);
                 apps = handler.getApps();
                 apks = handler.getApks();
-                updateRepo(handler, downloader.getCacheTag());
+
+                rememberer = new RepoUpdateRememberer();
+                rememberer.context = context;
+                rememberer.repo = repo;
+                rememberer.values = prepareRepoDetailsForSaving(handler, downloader.getCacheTag());
             }
         } catch (SAXException e) {
             throw new UpdateException(
@@ -196,7 +201,7 @@ abstract public class RepoUpdater {
         }
     }
 
-    private void updateRepo(RepoXMLHandler handler, String etag) {
+    private ContentValues prepareRepoDetailsForSaving (RepoXMLHandler handler, String etag) {
 
         ContentValues values = new ContentValues();
 
@@ -244,9 +249,25 @@ abstract public class RepoUpdater {
             values.put(RepoProvider.DataColumns.NAME, handler.getName());
         }
 
+        return values;
+    }
+
+    public RepoUpdateRememberer getRememberer() {
+        return rememberer;
+    }
+
+    public static class RepoUpdateRememberer {
+
+        private Context context;
+        private Repo repo;
+        private ContentValues values;
+
+        public void rememberUpdate() {
              RepoProvider.Helper.update(context, repo, values);
         }
 
+    }
+
     public static class UpdateException extends Exception {
 
         private static final long serialVersionUID = -4492452418826132803L;