Added @-mentions option in people drawer.

Fix:#351 and Fix:#39

Author: jainkuniya

app/src/main/java/com/zulip/android/activities/RefreshableCursorAdapter.java

@@ -66,8 +66,20 @@ public void onClick(View v) {
                     }
                 });
                 return;
+            } else if (position == 1) {
+                tileHolder.tvName.setText(R.string.mentions);
+                tileHolder.ivDot.setVisibility(View.VISIBLE);
+                tileHolder.ivDot.setBackgroundResource(R.drawable.ic_mentions);
+                holder.itemView.setOnClickListener(new View.OnClickListener() {
+                    @Override
+                    public void onClick(View v) {
+                        onPeopleSelect(Constants.MENTIONS);
+                    }
+                });
+                return;
             }
-            position = tileHolder.getLayoutPosition() - 1;
+            //first two are narrow to all private message and mentions
+            position = tileHolder.getLayoutPosition() - 2;
             tileHolder.tvName.setText(mList.get(position).getPerson().getName());
             //app is passed as parameter from ZulipActivity
             //presence of all persons are in ZulipApp
@@ -118,14 +130,15 @@ public void onClick(View v) {
 
     @Override
     public int getItemCount() {
-        return mList.size() + 1;
+        //first two are narrow to all private message and mentions
+        return mList.size() + 2;
     }
 
     @Override
     public long getHeaderId(int position) {
-        if (position == 0)
+        if (position == 0 || position == 1)
             return FloatingHeaderDecoration.NO_HEADER_ID;
-        return (long) mList.get(position - 1).getGroupId();
+        return (long) mList.get(position - 2).getGroupId();
     }
 
     @Override
@@ -136,7 +149,8 @@ public HeaderHolder onCreateHeaderViewHolder(ViewGroup parent) {
 
     @Override
     public void onBindHeaderViewHolder(HeaderHolder headerHolder, int position) {
-        headerHolder.tvHeading.setText(mList.get(position - 1).getGroupName());
+        //first two are narrow to all private message and mentions
+        headerHolder.tvHeading.setText(mList.get(position - 2).getGroupName());
     }
 
     private static class TileHolder extends RecyclerView.ViewHolder {

app/src/main/java/com/zulip/android/activities/ZulipActivity.java

@@ -86,6 +86,7 @@
 import com.zulip.android.filters.NarrowFilter;
 import com.zulip.android.filters.NarrowFilterAllPMs;
 import com.zulip.android.filters.NarrowFilterByDate;
+import com.zulip.android.filters.NarrowFilterMentioned;
 import com.zulip.android.filters.NarrowFilterPM;
 import com.zulip.android.filters.NarrowFilterSearch;
 import com.zulip.android.filters.NarrowFilterStar;
@@ -722,6 +723,8 @@ protected void onPeopleSelect(int id) {
                     resetPeopleSearch();
                     if (id == Constants.ALL_PEOPLE_ID) {
                         openAllPrivateMessages();
+                    } else if (id == Constants.MENTIONS) {
+                        doNarrow(new NarrowFilterMentioned());
                     } else {
                         Person person = Person.getById(app, id);
                         narrowPMWith(person);

app/src/main/java/com/zulip/android/filters/NarrowFilterMentioned.java

@@ -0,0 +1,105 @@
+package com.zulip.android.filters;
+
+import android.os.Parcel;
+import android.support.v4.content.ContextCompat;
+import android.text.TextUtils;
+
+import com.j256.ormlite.stmt.SelectArg;
+import com.j256.ormlite.stmt.Where;
+import com.zulip.android.R;
+import com.zulip.android.ZulipApp;
+import com.zulip.android.models.Message;
+import com.zulip.android.models.MessageType;
+import com.zulip.android.models.Person;
+import com.zulip.android.models.Stream;
+
+import org.json.JSONArray;
+import org.json.JSONException;
+
+import java.sql.SQLException;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
+
+public class NarrowFilterMentioned implements NarrowFilter {
+    public static final Creator<NarrowFilterMentioned> CREATOR = new Creator<NarrowFilterMentioned>() {
+        public NarrowFilterMentioned createFromParcel(Parcel in) {
+            return new NarrowFilterMentioned();
+        }
+
+        public NarrowFilterMentioned[] newArray(int size) {
+            return new NarrowFilterMentioned[size];
+        }
+    };
+
+    private String name;
+
+    public NarrowFilterMentioned() {
+        name = ZulipApp.get().getYou().getName();
+    }
+
+    public int describeContents() {
+        return 0;
+    }
+
+    public void writeToParcel(Parcel dest, int flags) {
+        dest.writeString(this.name);
+    }
+
+    @Override
+    public Where<Message, Object> modWhere(Where<Message, Object> where)
+            throws SQLException {
+
+        where.like(Message.CONTENT_FIELD, name);
+        return where;
+    }
+
+    @Override
+    public boolean matches(Message msg) {
+        return msg.getContent().contains(name);
+    }
+
+    @Override
+    public String getTitle() {
+        return ZulipApp.get().getString(R.string.mentions);
+    }
+
+    @Override
+    public String getSubtitle() {
+        return null;
+    }
+
+    @Override
+    public Stream getComposeStream() {
+        return null;
+    }
+
+    @Override
+    public String getComposePMRecipient() {
+        return "";
+    }
+
+    @Override
+    public String getJsonFilter() throws JSONException {
+        return (new JSONArray()).put(new JSONArray(Arrays.asList("is", "mentioned"))).toString();
+    }
+
+    @Override
+    public boolean equals(NarrowFilter filter) {
+        if (filter instanceof NarrowFilterMentioned) {
+            NarrowFilterMentioned filterPM = (NarrowFilterMentioned) filter;
+            return this.getTitle().equals(filterPM.getTitle());
+        } else {
+            return false;
+        }
+    }
+
+    @Override
+    public String toString() {
+        try {
+            return getJsonFilter();
+        } catch (JSONException e) {
+            return null;
+        }
+    }
+}

app/src/main/java/com/zulip/android/util/Constants.java

@@ -22,4 +22,6 @@ public class Constants {
     public static final int PEOPLE_DRAWER_OTHERS_GROUP_ID = 2;
     // row number which is used to differentiate the 'All private messages' in people drawer
     public static final int ALL_PEOPLE_ID = -1;
+    // row number which is used to differentiate the '@-mentions' in people drawer
+    public static int MENTIONS = -2;
 }

app/src/main/res/drawable/ic_mentions.png

@@ -166,4 +166,5 @@
     <string name="people_drawer_active_label">Active</string>
     <string name="people_drawer_recent_pm_label">Recent Private Messages</string>
     <string name="people_drawer_others_label">New Private Message</string>
+    <string name="mentions">\@-mentions</string>
 </resources>