Android: Implement cloud save

The LOMainActivity now needs to be aware of Document Providers, so we
pass the providerId and documentUri in the Intent so it can rebuild
the DocumentProvider and the IFile objects.

We also implement the ownCloud save operation.

TODO: since the local save operation does not have a callback, we do
not know when the cloud save operation should be performed. Now we
just wait 5 seconds to trigger it.

Change-Id: I060969e12888eca07c8c56ddc82cbed6c45a0739
(cherry picked from commit 626ebde4)

android/source/src/java/org/libreoffice/LibreOfficeMainActivity.java

 package org.libreoffice;
 
+import android.app.Activity;
 import android.app.AlertDialog;
 import android.content.ContentResolver;
 import android.content.Context;
 import android.content.DialogInterface;
 import android.content.Intent;
+import android.os.AsyncTask;
 import android.os.Bundle;
 import android.os.Handler;
 import android.preference.PreferenceManager;
@@ -21,6 +23,8 @@ import android.widget.ListView;
 import android.widget.Toast;
 
 import org.libreoffice.overlay.DocumentOverlay;
+import org.libreoffice.storage.DocumentProviderFactory;
+import org.libreoffice.storage.IFile;
 import org.mozilla.gecko.ZoomConstraints;
 import org.mozilla.gecko.gfx.GeckoLayerClient;
 import org.mozilla.gecko.gfx.LayerView;
@@ -31,6 +35,7 @@ import java.io.FileOutputStream;
 import java.io.IOException;
 import java.io.InputStream;
 import java.io.OutputStream;
+import java.net.URI;
 import java.util.ArrayList;
 import java.util.List;
 
@@ -50,13 +55,16 @@ public class LibreOfficeMainActivity extends ActionBarActivity {
 
     private static boolean mEnableEditing;
 
+    int providerId;
+    URI documentUri;
+
     public Handler mMainHandler;
 
     private DrawerLayout mDrawerLayout;
     private ListView mDrawerList;
     private List<DocumentPartView> mDocumentPartView = new ArrayList<DocumentPartView>();
     private DocumentPartViewListAdapter mDocumentPartViewListAdapter;
-    private String mInputFile;
+    private File mInputFile;
     private DocumentOverlay mDocumentOverlay;
     private File mTempFile = null;
     private LOAbout mAbout;
@@ -110,8 +118,7 @@ public class LibreOfficeMainActivity extends ActionBarActivity {
                 mAbout.showAbout();
                 return true;
             case R.id.action_save:
-                Toast.makeText(this, "Saving the document...", Toast.LENGTH_SHORT).show();
-                LOKitShell.sendEvent(new LOEvent(LOEvent.UNO_COMMAND, ".uno:Save"));
+                saveDocument();
                 return true;
             case R.id.action_parts:
                 mDrawerLayout.openDrawer(mDrawerList);
@@ -154,17 +161,23 @@ public class LibreOfficeMainActivity extends ActionBarActivity {
         if (getIntent().getData() != null) {
             if (getIntent().getData().getScheme().equals(ContentResolver.SCHEME_CONTENT)) {
                 if (copyFileToTemp() && mTempFile != null) {
-                    mInputFile = mTempFile.getPath();
+                    mInputFile = mTempFile;
                     Log.d(LOGTAG, "SCHEME_CONTENT: getPath(): " + getIntent().getData().getPath());
                 } else {
                     // TODO: can't open the file
                 }
             } else if (getIntent().getData().getScheme().equals(ContentResolver.SCHEME_FILE)) {
-                mInputFile = getIntent().getData().getPath();
+                mInputFile = new File(getIntent().getData().getPath());
                 Log.d(LOGTAG, "SCHEME_FILE: getPath(): " + getIntent().getData().getPath());
+
+                // Gather data to rebuild IFile object later
+                providerId = getIntent().getIntExtra(
+                        "org.libreoffice.document_provider_id", 0);
+                documentUri = (URI) getIntent().getSerializableExtra(
+                        "org.libreoffice.document_uri");
             }
         } else {
-            mInputFile = DEFAULT_DOC_PATH;
+            mInputFile = new File(DEFAULT_DOC_PATH);
         }
 
         toolbar.setNavigationOnClickListener(new View.OnClickListener() {
@@ -238,6 +251,50 @@ public class LibreOfficeMainActivity extends ActionBarActivity {
         return false;
     }
 
+    /**
+     * Save the document and invoke save on document provider to upload the file
+     * to the cloud if necessary.
+     */
+    private void saveDocument() {
+        Toast.makeText(this, "Saving the document...", Toast.LENGTH_SHORT).show();
+        // local save
+        LOKitShell.sendEvent(new LOEvent(LOEvent.UNO_COMMAND, ".uno:Save"));
+
+        final AsyncTask<Void, Void, Void> task = new AsyncTask<Void, Void, Void>() {
+            @Override
+            protected Void doInBackground(Void... params) {
+                try {
+                    // rebuild the IFile object from the data passed in the Intent
+                    IFile mStorageFile = DocumentProviderFactory.getInstance()
+                            .getProvider(providerId).createFromUri(documentUri);
+                    // call document provider save operation
+                    mStorageFile.saveDocument(mInputFile);
+                }
+                catch (final RuntimeException e) {
+                    final Activity activity = LibreOfficeMainActivity.this;
+                    activity.runOnUiThread(new Runnable() {
+                        @Override
+                        public void run() {
+                            Toast.makeText(activity, e.getMessage(),
+                                    Toast.LENGTH_SHORT).show();
+                        }
+                    });
+                    Log.e(LOGTAG, e.getMessage(), e.getCause());
+                }
+                return null;
+            }
+        };
+        // Delay the call to document provider save operation to ensure the local
+        // file has been saved.
+        // FIXME: horrible hack, ideally the save operation should have a callback
+        new Handler().postDelayed(new Runnable() {
+            @Override
+            public void run() {
+                task.execute();
+            }
+        }, 5000);
+    }
+
     @Override
     protected void onResume() {
         super.onResume();
@@ -260,7 +317,7 @@ public class LibreOfficeMainActivity extends ActionBarActivity {
     protected void onStart() {
         Log.i(LOGTAG, "onStart..");
         super.onStart();
-        LOKitShell.sendLoadEvent(mInputFile);
+        LOKitShell.sendLoadEvent(mInputFile.getPath());
     }
 
     @Override

android/source/src/java/org/libreoffice/storage/IFile.java

@@ -102,4 +102,12 @@ public interface IFile {
      * @throws RuntimeException in case of error.
      */
     File getDocument();
+
+    /**
+     * Replaces the wrapped document with a new version of it.
+     *
+     * @param file
+     *            A local file pointing to the new version of the document.
+     */
+    void saveDocument(File file);
 }

android/source/src/java/org/libreoffice/storage/local/LocalFile.java

@@ -93,4 +93,9 @@ public class LocalFile implements IFile {
         LocalFile file = (LocalFile) object;
         return file.getUri().equals(getUri());
     }
+
+    @Override
+    public void saveDocument(File file) {
+        // do nothing; file is local
+    }
 }

android/source/src/java/org/libreoffice/storage/owncloud/OwnCloudFile.java

@@ -9,10 +9,14 @@ import java.util.List;
 
 import org.libreoffice.storage.IFile;
 
+import android.util.Log;
+
 import com.owncloud.android.lib.common.operations.RemoteOperationResult;
+import com.owncloud.android.lib.resources.files.ChunkedUploadRemoteFileOperation;
 import com.owncloud.android.lib.resources.files.DownloadRemoteFileOperation;
 import com.owncloud.android.lib.resources.files.ReadRemoteFolderOperation;
 import com.owncloud.android.lib.resources.files.RemoteFile;
+import com.owncloud.android.lib.resources.files.UploadRemoteFileOperation;
 
 /**
  * Implementation of IFile for ownCloud servers.
@@ -119,4 +123,22 @@ public class OwnCloudFile implements IFile {
         OwnCloudFile file = (OwnCloudFile) object;
         return file.getUri().equals(getUri());
     }
+
+    @Override
+    public void saveDocument(File newFile) {
+        UploadRemoteFileOperation uploadOperation;
+        if (newFile.length() > ChunkedUploadRemoteFileOperation.CHUNK_SIZE) {
+            uploadOperation = new ChunkedUploadRemoteFileOperation(
+                    newFile.getPath(), file.getRemotePath(), file.getMimeType());
+        } else {
+            uploadOperation = new UploadRemoteFileOperation(newFile.getPath(),
+                    file.getRemotePath(), file.getMimeType());
+        }
+
+        RemoteOperationResult result = uploadOperation.execute(provider
+                .getClient());
+        if (!result.isSuccess()) {
+            throw provider.buildRuntimeExceptionForResultCode(result.getCode());
+        }
+    }
 }

android/source/src/java/org/libreoffice/ui/LibreOfficeUIActivity.java

@@ -351,7 +351,7 @@ public class LibreOfficeUIActivity extends ActionBarActivity implements ActionBa
         }.execute(dir);
     }
 
-    public void open(IFile document) {
+    public void open(final IFile document) {
         new AsyncTask<IFile, Void, File>() {
             @Override
             protected File doInBackground(IFile... document) {
@@ -382,6 +382,13 @@ public class LibreOfficeUIActivity extends ActionBarActivity implements ActionBa
                     ComponentName componentName = new ComponentName(packageName,
                             LibreOfficeMainActivity.class.getName());
                     i.setComponent(componentName);
+
+                    // these extras allow to rebuild the IFile object in LOMainActivity
+                    i.putExtra("org.libreoffice.document_provider_id",
+                            documentProvider.getId());
+                    i.putExtra("org.libreoffice.document_uri",
+                            document.getUri());
+
                     startActivity(i);
                 }
             }