This commit adds badges to the forum list that indicate unread posts.

It does so by extending the compound view `TextAvatarView` and provides
convienient setters that take care of the required UI changes.
The new badge can also be used to indicate a problem with the forum.

Closes #408

briar-android/src/org/briarproject/android/forum/ForumListAdapter.java

@@ -19,10 +19,12 @@ import org.briarproject.api.sync.GroupId;
 
 import java.util.Collection;
 
+import static android.view.View.GONE;
+import static android.view.View.VISIBLE;
 import static org.briarproject.android.BriarActivity.GROUP_ID;
 import static org.briarproject.android.forum.ForumActivity.FORUM_NAME;
 
-public class ForumListAdapter extends
+class ForumListAdapter extends
 		RecyclerView.Adapter<ForumListAdapter.ForumViewHolder> {
 
 	private SortedList<ForumListItem> forums = new SortedList<>(
@@ -76,7 +78,7 @@ public class ForumListAdapter extends
 
 	private final Context ctx;
 
-	public ForumListAdapter(Context ctx) {
+	ForumListAdapter(Context ctx) {
 		this.ctx = ctx;
 	}
 
@@ -94,31 +96,36 @@ public class ForumListAdapter extends
 		// Avatar
 		ui.avatar.setText(item.getForum().getName().substring(0, 1));
 		ui.avatar.setBackgroundBytes(item.getForum().getId().getBytes());
+		ui.avatar.setUnreadCount(item.getUnreadCount());
 
 		// Forum Name
 		ui.name.setText(item.getForum().getName());
 
-		// Unread Count
-		int unread = item.getUnreadCount();
-		if (unread > 0) {
+		// Post Count
+		int postCount = item.getPostCount();
+		if (postCount > 0) {
 			ui.unread.setText(ctx.getResources()
-					.getQuantityString(R.plurals.unread_posts, unread, unread));
+					.getQuantityString(R.plurals.forum_posts, postCount,
+							postCount));
 			ui.unread.setTextColor(
-					ContextCompat.getColor(ctx, R.color.briar_button_positive));
+					ContextCompat
+							.getColor(ctx, R.color.briar_text_secondary));
 		} else {
-			ui.unread.setText(ctx.getString(R.string.no_unread_posts));
+			ui.avatar.setProblem(true);
+			ui.unread.setText(ctx.getString(R.string.forum_no_posts));
 			ui.unread.setTextColor(
-					ContextCompat.getColor(ctx, R.color.briar_text_secondary));
+					ContextCompat
+							.getColor(ctx, R.color.briar_text_tertiary));
 		}
 
-		// Date or "No Posts"
+		// Date
 		if (item.isEmpty()) {
-			ui.date.setVisibility(View.GONE);
+			ui.date.setVisibility(GONE);
 		} else {
 			long timestamp = item.getTimestamp();
 			ui.date.setText(
 					DateUtils.getRelativeTimeSpanString(ctx, timestamp));
-			ui.date.setVisibility(View.VISIBLE);
+			ui.date.setVisibility(VISIBLE);
 		}
 
 		// Open Forum on Click
@@ -158,7 +165,7 @@ public class ForumListAdapter extends
 		forums.addAll(items);
 	}
 
-	public void updateItem(ForumListItem item) {
+	void updateItem(ForumListItem item) {
 		ForumListItem oldItem = getItem(item.getForum().getGroup().getId());
 		int position = forums.indexOf(oldItem);
 		forums.updateItemAt(position, item);
@@ -176,7 +183,7 @@ public class ForumListAdapter extends
 		return forums.size() == 0;
 	}
 
-	protected static class ForumViewHolder extends RecyclerView.ViewHolder {
+	static class ForumViewHolder extends RecyclerView.ViewHolder {
 
 		private final ViewGroup layout;
 		private final TextAvatarView avatar;
@@ -184,7 +191,7 @@ public class ForumListAdapter extends
 		private final TextView unread;
 		private final TextView date;
 
-		public ForumViewHolder(View v) {
+		ForumViewHolder(View v) {
 			super(v);
 
 			layout = (ViewGroup) v;

briar-android/src/org/briarproject/android/forum/ForumListFragment.java

@@ -14,8 +14,6 @@ import android.view.View;
 import android.view.ViewGroup;
 
 import org.briarproject.R;
-import org.briarproject.android.ActivityComponent;
-import org.briarproject.android.AndroidComponent;
 import org.briarproject.android.fragment.BaseEventFragment;
 import org.briarproject.android.util.BriarRecyclerView;
 import org.briarproject.api.db.DbException;

briar-android/src/org/briarproject/android/forum/ForumListItem.java

@@ -9,6 +9,7 @@ class ForumListItem {
 
 	private final Forum forum;
 	private final boolean empty;
+	private final int postCount;
 	private final long timestamp;
 	private final int unread;
 
@@ -16,6 +17,7 @@ class ForumListItem {
 		this.forum = forum;
 		empty = headers.isEmpty();
 		if (empty) {
+			postCount = 0;
 			timestamp = 0;
 			unread = 0;
 		} else {
@@ -29,6 +31,7 @@ class ForumListItem {
 				}
 				if (!h.isRead()) unread++;
 			}
+			this.postCount = headers.size();
 			this.timestamp = newest.getTimestamp();
 			this.unread = unread;
 		}
@@ -42,6 +45,10 @@ class ForumListItem {
 		return empty;
 	}
 
+	int getPostCount() {
+		return postCount;
+	}
+
 	long getTimestamp() {
 		return timestamp;
 	}

briar-android/src/org/briarproject/android/util/TextAvatarView.java

@@ -1,13 +1,13 @@
 package org.briarproject.android.util;
 
 import android.content.Context;
-import android.content.res.ColorStateList;
 import android.graphics.Color;
-import android.graphics.PorterDuff;
+import android.support.v4.content.ContextCompat;
 import android.support.v7.widget.AppCompatTextView;
 import android.util.AttributeSet;
 import android.view.LayoutInflater;
 import android.widget.FrameLayout;
+import android.widget.TextView;
 
 import org.briarproject.R;
 
@@ -15,8 +15,10 @@ import de.hdodenhof.circleimageview.CircleImageView;
 
 public class TextAvatarView extends FrameLayout {
 
-	final private AppCompatTextView textView;
-	final private CircleImageView backgroundView;
+	final private AppCompatTextView character;
+	final private CircleImageView background;
+	final private TextView badge;
+	private int unreadCount;
 
 	public TextAvatarView(Context context, AttributeSet attrs) {
 		super(context, attrs);
@@ -25,8 +27,10 @@ public class TextAvatarView extends FrameLayout {
 				.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
 		inflater
 				.inflate(R.layout.text_avatar_view, this, true);
-		textView = (AppCompatTextView) findViewById(R.id.textAvatarView);
-		backgroundView = (CircleImageView) findViewById(R.id.avatarBackground);
+		character = (AppCompatTextView) findViewById(R.id.textAvatarView);
+		background = (CircleImageView) findViewById(R.id.avatarBackground);
+		badge = (TextView) findViewById(R.id.unreadCountView);
+		badge.setVisibility(INVISIBLE);
 	}
 
 	public TextAvatarView(Context context) {
@@ -34,7 +38,32 @@ public class TextAvatarView extends FrameLayout {
 	}
 
 	public void setText(String text) {
-		textView.setText(text);
+		character.setText(text);
+	}
+
+	public void setUnreadCount(int count) {
+		if (count > 0) {
+			this.unreadCount = count;
+			badge.setBackgroundResource(R.drawable.bubble);
+			badge.setText(String.valueOf(count));
+			badge.setTextColor(ContextCompat.getColor(getContext(), R.color.briar_text_primary_inverse));
+			badge.setVisibility(VISIBLE);
+		} else {
+			badge.setVisibility(INVISIBLE);
+		}
+	}
+
+	public void setProblem(boolean problem) {
+		if (problem) {
+			badge.setBackgroundResource(R.drawable.bubble_problem);
+			badge.setText("!");
+			badge.setTextColor(ContextCompat.getColor(getContext(), R.color.briar_primary));
+			badge.setVisibility(VISIBLE);
+		} else if (unreadCount > 0) {
+			setUnreadCount(unreadCount);
+		} else {
+			badge.setVisibility(INVISIBLE);
+		}
 	}
 
 	public void setBackgroundBytes(byte[] bytes) {
@@ -43,7 +72,7 @@ public class TextAvatarView extends FrameLayout {
 		int b = getByte(bytes, 2) * 3 / 4 + 96;
 		int color = Color.rgb(r, g, b);
 
-		backgroundView.setFillColor(color);
+		background.setFillColor(color);
 	}
 
 	private byte getByte(byte[] bytes, int index) {