do not attempt to download images when not connected

res/values/strings.xml

@@ -268,5 +268,6 @@
     <string name="using_account">using account %s</string>
     <string name="checking_image">Checking image on HTTP host</string>
     <string name="image_file_deleted">The image file has been deleted</string>
+    <string name="not_connected_try_again">You are not connected. Try again later</string>
 
 </resources>

src/eu/siacs/conversations/entities/Downloadable.java

@@ -12,7 +12,7 @@ public interface Downloadable {
 	public static final int STATUS_DOWNLOADING = 0x204;
 	public static final int STATUS_DELETED = 0x205;
 
-	public void start();
+	public boolean start();
 
 	public int getStatus();
 

src/eu/siacs/conversations/http/HttpConnection.java

@@ -12,7 +12,9 @@ import javax.net.ssl.HttpsURLConnection;
 import android.content.Intent;
 import android.graphics.BitmapFactory;
 import android.net.Uri;
+import android.util.Log;
 
+import eu.siacs.conversations.Config;
 import eu.siacs.conversations.entities.Downloadable;
 import eu.siacs.conversations.entities.DownloadableFile;
 import eu.siacs.conversations.entities.Message;
@@ -35,9 +37,14 @@ public class HttpConnection implements Downloadable {
 	}
 
 	@Override
-	public void start() {
-		changeStatus(STATUS_DOWNLOADING);
-		new Thread(new FileDownloader()).start();
+	public boolean start() {
+		if (mXmppConnectionService.hasInternetConnection()) {
+			changeStatus(STATUS_DOWNLOADING);
+			new Thread(new FileDownloader()).start();
+			return true;
+		} else {
+			return false;
+		}
 	}
 
 	public void init(Message message) {

src/eu/siacs/conversations/http/HttpConnectionManager.java

@@ -1,11 +1,9 @@
 package eu.siacs.conversations.http;
 
-import java.net.URL;
 import java.util.List;
 import java.util.concurrent.CopyOnWriteArrayList;
 
 import eu.siacs.conversations.entities.Message;
-import eu.siacs.conversations.entities.Message.ImageParams;
 import eu.siacs.conversations.services.AbstractConnectionManager;
 import eu.siacs.conversations.services.XmppConnectionService;
 

src/eu/siacs/conversations/services/NotificationService.java

@@ -13,12 +13,10 @@ import android.content.Intent;
 import android.content.SharedPreferences;
 import android.net.Uri;
 import android.os.PowerManager;
-import android.os.SystemClock;
 import android.support.v4.app.NotificationCompat;
 import android.support.v4.app.TaskStackBuilder;
 import android.text.Html;
 
-import eu.siacs.conversations.Config;
 import eu.siacs.conversations.R;
 import eu.siacs.conversations.entities.Account;
 import eu.siacs.conversations.entities.Conversation;

src/eu/siacs/conversations/services/XmppConnectionService.java

@@ -346,15 +346,10 @@ public class XmppConnectionService extends Service {
 			}
 		}
 		this.wakeLock.acquire();
-		ConnectivityManager cm = (ConnectivityManager) getApplicationContext()
-				.getSystemService(Context.CONNECTIVITY_SERVICE);
-		NetworkInfo activeNetwork = cm.getActiveNetworkInfo();
-		boolean isConnected = activeNetwork != null
-				&& activeNetwork.isConnected();
-
+		
 		for (Account account : accounts) {
 			if (!account.isOptionSet(Account.OPTION_DISABLED)) {
-				if (!isConnected) {
+				if (!hasInternetConnection()) {
 					account.setStatus(Account.STATUS_NO_INTERNET);
 					if (statusListener != null) {
 						statusListener.onStatusChanged(account);
@@ -412,6 +407,13 @@ public class XmppConnectionService extends Service {
 		}
 		return START_STICKY;
 	}
+	
+	public boolean hasInternetConnection() {
+		ConnectivityManager cm = (ConnectivityManager) getApplicationContext()
+				.getSystemService(Context.CONNECTIVITY_SERVICE);
+		NetworkInfo activeNetwork = cm.getActiveNetworkInfo();
+		return activeNetwork != null && activeNetwork.isConnected();
+	}
 
 	@SuppressLint("TrulyRandom")
 	@Override
@@ -1873,8 +1875,8 @@ public class XmppConnectionService extends Service {
 	private class DeletedDownloadable implements Downloadable {
 
 		@Override
-		public void start() {
-			return;
+		public boolean start() {
+			return false;
 		}
 
 		@Override

src/eu/siacs/conversations/ui/adapter/MessageAdapter.java

@@ -102,7 +102,8 @@ public class MessageAdapter extends ArrayAdapter<Message> {
 		}
 		boolean multiReceived = message.getConversation().getMode() == Conversation.MODE_MULTI
 				&& message.getMergedStatus() <= Message.STATUS_RECEIVED;
-		if (message.getType() == Message.TYPE_IMAGE) {
+		if (message.getType() == Message.TYPE_IMAGE
+				|| message.getDownloadable() != null) {
 			ImageParams params = message.getImageParams();
 			if (params.size != 0) {
 				filesize = params.size / 1024 + " KB";
@@ -262,6 +263,20 @@ public class MessageAdapter extends ArrayAdapter<Message> {
 		viewHolder.messageBody.setTextIsSelectable(true);
 	}
 
+	private void displayDownloadableMessage(ViewHolder viewHolder,
+			final Message message) {
+		viewHolder.image.setVisibility(View.GONE);
+		viewHolder.messageBody.setVisibility(View.GONE);
+		viewHolder.download_button.setVisibility(View.VISIBLE);
+		viewHolder.download_button.setOnClickListener(new OnClickListener() {
+
+			@Override
+			public void onClick(View v) {
+				startDonwloadable(message);
+			}
+		});
+	}
+
 	private void displayImageMessage(ViewHolder viewHolder,
 			final Message message) {
 		if (viewHolder.download_button != null) {
@@ -474,20 +489,11 @@ public class MessageAdapter extends ArrayAdapter<Message> {
 			} else if (d != null
 					&& d.getStatus() == Downloadable.STATUS_CHECKING) {
 				displayInfoMessage(viewHolder, R.string.checking_image);
-			} else if (d != null && d.getStatus() == Downloadable.STATUS_DELETED) {
+			} else if (d != null
+					&& d.getStatus() == Downloadable.STATUS_DELETED) {
 				displayInfoMessage(viewHolder, R.string.image_file_deleted);
 			} else if (d != null && d.getStatus() == Downloadable.STATUS_OFFER) {
-				viewHolder.image.setVisibility(View.GONE);
-				viewHolder.messageBody.setVisibility(View.GONE);
-				viewHolder.download_button.setVisibility(View.VISIBLE);
-				viewHolder.download_button
-						.setOnClickListener(new OnClickListener() {
-
-							@Override
-							public void onClick(View v) {
-								startDonwloadable(item);
-							}
-						});
+				displayDownloadableMessage(viewHolder, item);
 			} else if ((item.getEncryption() == Message.ENCRYPTION_DECRYPTED)
 					|| (item.getEncryption() == Message.ENCRYPTION_NONE)
 					|| (item.getEncryption() == Message.ENCRYPTION_OTR)) {
@@ -525,13 +531,13 @@ public class MessageAdapter extends ArrayAdapter<Message> {
 		return view;
 	}
 
-	public boolean startDonwloadable(Message message) {
+	public void startDonwloadable(Message message) {
 		Downloadable downloadable = message.getDownloadable();
 		if (downloadable != null) {
-			downloadable.start();
-			return true;
-		} else {
-			return false;
+			if (!downloadable.start()) {
+				Toast.makeText(activity, R.string.not_connected_try_again,
+						Toast.LENGTH_SHORT).show();
+			}
 		}
 	}
 

src/eu/siacs/conversations/xmpp/jingle/JingleConnection.java

@@ -875,17 +875,20 @@ public class JingleConnection implements Downloadable {
 		return this.transport;
 	}
 
-	public void start() {
-		if (mJingleStatus == JINGLE_STATUS_INITIATED) {
-			new Thread(new Runnable() {
-
-				@Override
-				public void run() {
-					sendAccept();
-				}
-			}).start();
+	public boolean start() {
+		if (account.getStatus() == Account.STATUS_ONLINE) {
+			if (mJingleStatus == JINGLE_STATUS_INITIATED) {
+				new Thread(new Runnable() {
+	
+					@Override
+					public void run() {
+						sendAccept();
+					}
+				}).start();
+			}
+			return true;
 		} else {
-			Log.d(Config.LOGTAG, "status (" + mJingleStatus + ") was not ok");
+			return false;
 		}
 	}