Can update group membership

app/src/main/java/org/communiquons/android/comunic/client/data/helpers/GroupsHelper.java

@@ -161,6 +161,70 @@ public class GroupsHelper extends BaseHelper {
         }
     }
 
+    /**
+     * Send a group membership request
+     *
+     * @param groupID The ID of the target group
+     * @return Depends of the success of the operation
+     */
+    public boolean sendRequest(int groupID){
+        APIRequest request = new APIRequest(getContext(), "groups/send_request");
+        request.addInt("id", groupID);
+        return performMembershipUpdate(request);
+    }
+
+    /**
+     * Cancel a group membership request
+     *
+     * @param groupID the ID of the target group
+     * @return TRUE in case of success / FALSE else
+     */
+    public boolean cancelRequest(int groupID){
+        APIRequest request = new APIRequest(getContext(), "groups/cancel_request");
+        request.addInt("id", groupID);
+        return performMembershipUpdate(request);
+    }
+
+    /**
+     * Respond to a group membership invitation
+     *
+     * @param groupID The ID of the target group
+     * @param accept TRUE to accept invitation / FALSE else
+     */
+    public boolean respondInvitation(int groupID, boolean accept){
+        APIRequest request = new APIRequest(getContext(), "groups/respond_invitation");
+        request.addInt("id", groupID);
+        request.addBoolean("accept", accept);
+        return performMembershipUpdate(request);
+    }
+
+    /**
+     * Leave a group
+     *
+     * @param groupID The ID of the group to leave
+     * @return TRUE for a success / FALSE else
+     */
+    public boolean leaveGroup(int groupID){
+        APIRequest request = new APIRequest(getContext(), "groups/remove_membership");
+        request.addInt("id", groupID);
+        return performMembershipUpdate(request);
+    }
+
+    /**
+     * Perform on the server a membership update
+     *
+     * @param request The request to perform
+     * @return Depends of the success of the operation
+     */
+    private boolean performMembershipUpdate(APIRequest request){
+        try {
+            return new APIRequestHelper().exec(request).getResponse_code() == 200;
+        } catch (Exception e) {
+            e.printStackTrace();
+            return false;
+        }
+    }
+
     /**
      * Parse group information into GroupInfo object
      *

app/src/main/java/org/communiquons/android/comunic/client/ui/adapters/GroupsListAdapter.java

@@ -10,7 +10,9 @@ import android.widget.TextView;
 
 import org.communiquons.android.comunic.client.R;
 import org.communiquons.android.comunic.client.data.models.GroupInfo;
+import org.communiquons.android.comunic.client.ui.listeners.OnGroupMembershipUpdateListener;
 import org.communiquons.android.comunic.client.ui.views.GroupImageView;
+import org.communiquons.android.comunic.client.ui.views.GroupMembershipStatusView;
 
 import java.util.ArrayList;
 
@@ -26,6 +28,8 @@ public class GroupsListAdapter extends BaseRecyclerViewAdapter {
      */
     private ArrayList<GroupInfo> mList = new ArrayList<>();
 
+    private OnGroupMembershipUpdateListener mOnGroupMembershipUpdateListener;
+
     public GroupsListAdapter(Context context) {
         super(context);
     }
@@ -39,6 +43,15 @@ public class GroupsListAdapter extends BaseRecyclerViewAdapter {
         this.mList = List;
     }
 
+    /**
+     * Set the group membership update listener
+     *
+     * @param onGroupMembershipUpdateListener The listener
+     */
+    public void setOnGroupMembershipUpdateListener(OnGroupMembershipUpdateListener onGroupMembershipUpdateListener) {
+        this.mOnGroupMembershipUpdateListener = onGroupMembershipUpdateListener;
+    }
+
     @Override
     public int getItemCount() {
         return mList.size();
@@ -57,6 +70,7 @@ public class GroupsListAdapter extends BaseRecyclerViewAdapter {
         ((GroupHolder)viewHolder).bind(i);
     }
 
+
     /**
      * Single group holder class
      */
@@ -64,12 +78,16 @@ public class GroupsListAdapter extends BaseRecyclerViewAdapter {
 
         private GroupImageView mGroupImageView;
         private TextView mGroupName;
+        private GroupMembershipStatusView mGroupMembershipStatus;
 
         GroupHolder(@NonNull View itemView) {
             super(itemView);
 
             mGroupImageView = itemView.findViewById(R.id.groupImage);
             mGroupName = itemView.findViewById(R.id.groupName);
+            mGroupMembershipStatus = itemView.findViewById(R.id.groupMembershipStatusView);
+
+            mGroupMembershipStatus.setOnGroupMembershipUpdateListener(mOnGroupMembershipUpdateListener);
         }
 
         GroupInfo getGroup(int pos){
@@ -80,6 +98,7 @@ public class GroupsListAdapter extends BaseRecyclerViewAdapter {
             GroupInfo groupInfo = getGroup(pos);
             mGroupImageView.setGroup(groupInfo);
             mGroupName.setText(groupInfo.getDisplayName());
+            mGroupMembershipStatus.setGroup(groupInfo);
         }
     }
 }

app/src/main/java/org/communiquons/android/comunic/client/ui/asynctasks/CancelGroupMembershipRequestTask.java

@@ -0,0 +1,21 @@
+package org.communiquons.android.comunic.client.ui.asynctasks;
+
+import android.content.Context;
+
+import org.communiquons.android.comunic.client.data.helpers.GroupsHelper;
+
+/**
+ * Cancel a group membership request task
+ *
+ * @author Pierre HUBERT
+ */
+public class CancelGroupMembershipRequestTask extends SafeAsyncTask<Integer, Void, Boolean> {
+    public CancelGroupMembershipRequestTask(Context context) {
+        super(context);
+    }
+
+    @Override
+    protected Boolean doInBackground(Integer... integers) {
+        return new GroupsHelper(getContext()).cancelRequest(integers[0]);
+    }
+}

app/src/main/java/org/communiquons/android/comunic/client/ui/asynctasks/LeaveGroupTask.java

@@ -0,0 +1,21 @@
+package org.communiquons.android.comunic.client.ui.asynctasks;
+
+import android.content.Context;
+
+import org.communiquons.android.comunic.client.data.helpers.GroupsHelper;
+
+/**
+ * Leave group task
+ *
+ * @author Pierre HUBERT
+ */
+public class LeaveGroupTask extends SafeAsyncTask<Integer, Void, Boolean> {
+    public LeaveGroupTask(Context context) {
+        super(context);
+    }
+
+    @Override
+    protected Boolean doInBackground(Integer... integers) {
+        return new GroupsHelper(getContext()).leaveGroup(integers[0]);
+    }
+}

app/src/main/java/org/communiquons/android/comunic/client/ui/asynctasks/RespondGroupInvitationTask.java

@@ -0,0 +1,27 @@
+package org.communiquons.android.comunic.client.ui.asynctasks;
+
+import android.content.Context;
+
+import org.communiquons.android.comunic.client.data.helpers.GroupsHelper;
+
+/**
+ * Respond to a group membership invitation task
+ *
+ * @author Pierre HUBERT
+ */
+public class RespondGroupInvitationTask extends SafeAsyncTask<Integer, Void, Boolean> {
+
+    private boolean mAccept;
+
+
+    public RespondGroupInvitationTask(Context context, boolean accept) {
+        super(context);
+        this.mAccept = accept;
+    }
+
+
+    @Override
+    protected Boolean doInBackground(Integer... integers) {
+        return new GroupsHelper(getContext()).respondInvitation(integers[0], mAccept);
+    }
+}

app/src/main/java/org/communiquons/android/comunic/client/ui/asynctasks/SendGroupMembershipRequestTask.java

@@ -0,0 +1,21 @@
+package org.communiquons.android.comunic.client.ui.asynctasks;
+
+import android.content.Context;
+
+import org.communiquons.android.comunic.client.data.helpers.GroupsHelper;
+
+/**
+ * Send a group membership request task
+ *
+ * @author Pierre HUBERT
+ */
+public class SendGroupMembershipRequestTask extends SafeAsyncTask<Integer, Void, Boolean> {
+    public SendGroupMembershipRequestTask(Context context) {
+        super(context);
+    }
+
+    @Override
+    protected Boolean doInBackground(Integer... integers) {
+        return new GroupsHelper(getContext()).sendRequest(integers[0]);
+    }
+}

app/src/main/java/org/communiquons/android/comunic/client/ui/fragments/groups/AbstractGroupFragment.java

@@ -1,8 +1,21 @@
 package org.communiquons.android.comunic.client.ui.fragments.groups;
 
+import android.content.DialogInterface;
+import android.os.AsyncTask;
+import android.support.annotation.CallSuper;
+import android.support.v7.app.AlertDialog;
+import android.widget.Toast;
+
 import org.communiquons.android.comunic.client.R;
+import org.communiquons.android.comunic.client.data.models.GroupInfo;
 import org.communiquons.android.comunic.client.ui.activities.MainActivity;
+import org.communiquons.android.comunic.client.ui.asynctasks.CancelGroupMembershipRequestTask;
+import org.communiquons.android.comunic.client.ui.asynctasks.LeaveGroupTask;
+import org.communiquons.android.comunic.client.ui.asynctasks.RespondGroupInvitationTask;
+import org.communiquons.android.comunic.client.ui.asynctasks.SafeAsyncTask;
+import org.communiquons.android.comunic.client.ui.asynctasks.SendGroupMembershipRequestTask;
 import org.communiquons.android.comunic.client.ui.fragments.AbstractFragment;
+import org.communiquons.android.comunic.client.ui.listeners.OnGroupMembershipUpdateListener;
 
 import java.util.Objects;
 
@@ -11,7 +24,12 @@ import java.util.Objects;
  *
  * @author Pierre HUBERT
  */
-abstract class AbstractGroupFragment extends AbstractFragment {
+abstract class AbstractGroupFragment extends AbstractFragment implements OnGroupMembershipUpdateListener {
+
+    /**
+     * Debug tag
+     */
+    private static final String TAG = AbstractGroupFragment.class.getSimpleName();
 
     @Override
     public void onResume() {
@@ -20,4 +38,82 @@ abstract class AbstractGroupFragment extends AbstractFragment {
         MainActivity.SetNavbarSelectedOption(Objects.requireNonNull(getActivity()),
                 R.id.action_personal_page);
     }
+
+    @Override
+    public void onRespondInvitation(GroupInfo group, boolean accept) {
+        RespondGroupInvitationTask respondGroupInvitationTask =
+                new RespondGroupInvitationTask(getContext(), accept);
+        performGroupMembershipUpdate(group.getId(), respondGroupInvitationTask);
+    }
+
+    @Override
+    public void onCancelRequest(GroupInfo group) {
+        CancelGroupMembershipRequestTask task = new CancelGroupMembershipRequestTask(getActivity());
+        performGroupMembershipUpdate(group.getId(), task);
+    }
+
+    @Override
+    public void onSendRequest(GroupInfo group) {
+        SendGroupMembershipRequestTask task = new SendGroupMembershipRequestTask(getActivity());
+        performGroupMembershipUpdate(group.getId(), task);
+    }
+
+    @Override
+    public void onLeaveGroup(GroupInfo group) {
+        final int groupID = group.getId();
+        new AlertDialog.Builder(getActivity())
+                .setTitle(R.string.dialog_leave_group_title)
+                .setMessage(R.string.dialog_leave_group_message)
+                .setNegativeButton(R.string.dialog_leave_group_cancel, null)
+
+                .setPositiveButton(R.string.dialog_leave_group_confirm, new DialogInterface.OnClickListener() {
+                    @Override
+                    public void onClick(DialogInterface dialog, int which) {
+                        leaveGroup(groupID);
+                    }
+                }).show();
+    }
+
+    /**
+     * Do leave the group for the user
+     *
+     * @param groupID The ID of the group to leave
+     */
+    private void leaveGroup(final int groupID) {
+        LeaveGroupTask leaveGroupTask = new LeaveGroupTask(getActivity());
+        performGroupMembershipUpdate(groupID, leaveGroupTask);
+    }
+
+    /**
+     * Perform group membership update
+     *
+     * @param groupID The ID of the target group
+     * @param task    Task to execute
+     */
+    private void performGroupMembershipUpdate(final int groupID, SafeAsyncTask<Integer, Void, Boolean> task) {
+        task.setOnPostExecuteListener(new SafeAsyncTask.OnPostExecuteListener<Boolean>() {
+            @Override
+            public void OnPostExecute(Boolean success) {
+                onGroupMembershipUpdated(success, groupID);
+            }
+        });
+        task.executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR, groupID);
+        getTasksManager().addTask(task);
+    }
+
+    /**
+     * This method is called when the membership to a group has been updated
+     *
+     * @param success TRUE if the operation was a success / FALSE else
+     * @param groupID Information about the updated group
+     */
+    @CallSuper
+    public void onGroupMembershipUpdated(boolean success, int groupID) {
+
+        //Check for errors
+        if (!success)
+            Toast.makeText(getActivity(), R.string.err_update_group_membership,
+                    Toast.LENGTH_SHORT).show();
+
+    }
 }

app/src/main/java/org/communiquons/android/comunic/client/ui/fragments/groups/UserGroupsFragment.java

@@ -120,17 +120,29 @@ public class UserGroupsFragment extends AbstractGroupFragment {
 
         setProgressBarVisibility(false);
 
-        mGroupsAdapter = new GroupsListAdapter(getActivity());
+        if(mGroupsAdapter == null) {
-        mGroupsAdapter.setList(new ArrayList<>(mGroupsList.values()));
+            mGroupsAdapter = new GroupsListAdapter(getActivity());
 
-        mGroupsView.setAdapter(mGroupsAdapter);
+            mGroupsView.setAdapter(mGroupsAdapter);
-        mGroupsView.setLayoutManager(new LinearLayoutManager(getActivity()));
+            mGroupsView.setLayoutManager(new LinearLayoutManager(getActivity()));
-        mGroupsView.addItemDecoration(new DividerItemDecoration(getActivity(),
+            mGroupsView.addItemDecoration(new DividerItemDecoration(getActivity(),
-                DividerItemDecoration.VERTICAL));
+                    DividerItemDecoration.VERTICAL));
+        }
+
+
+        mGroupsAdapter.setOnGroupMembershipUpdateListener(this);
+        mGroupsAdapter.setList(new ArrayList<>(mGroupsList.values()));
+        mGroupsAdapter.notifyDataSetChanged();
 
         setNoGroupNoticeVisibility(mGroupsList.size() == 0);
     }
 
+    @Override
+    public void onGroupMembershipUpdated(boolean success, int groupID) {
+        super.onGroupMembershipUpdated(success, groupID);
+        getGroupsList();
+    }
+
     /**
      * Update (set) progressbar visibility
      *

app/src/main/java/org/communiquons/android/comunic/client/ui/listeners/OnGroupMembershipUpdateListener.java

@@ -0,0 +1,35 @@
+package org.communiquons.android.comunic.client.ui.listeners;
+
+import org.communiquons.android.comunic.client.data.models.GroupInfo;
+
+public interface OnGroupMembershipUpdateListener {
+
+    /**
+     * Respond to a group membership invitation
+     *
+     * @param group Information about the target group
+     * @param accept TRUE to accept / FALSE else
+     */
+    void onRespondInvitation(GroupInfo group, boolean accept);
+
+    /**
+     * Cancel a group membership request
+     *
+     * @param group The target group
+     */
+    void onCancelRequest(GroupInfo group);
+
+    /**
+     * Send a request to join a group
+     *
+     * @param group The target group
+     */
+    void onSendRequest(GroupInfo group);
+
+    /**
+     * Send a request to leave a group
+     *
+     * @param group The target group
+     */
+    void onLeaveGroup(GroupInfo group);
+}

app/src/main/java/org/communiquons/android/comunic/client/ui/views/GroupMembershipStatusView.java

@@ -0,0 +1,173 @@
+package org.communiquons.android.comunic.client.ui.views;
+
+import android.content.Context;
+import android.support.annotation.NonNull;
+import android.support.annotation.Nullable;
+import android.support.constraint.ConstraintLayout;
+import android.util.AttributeSet;
+import android.view.View;
+import android.widget.Button;
+
+import org.communiquons.android.comunic.client.R;
+import org.communiquons.android.comunic.client.data.models.GroupInfo;
+import org.communiquons.android.comunic.client.ui.listeners.OnGroupMembershipUpdateListener;
+
+/**
+ * Group membership button
+ *
+ * @author Pierre HUBERT
+ */
+public class GroupMembershipStatusView extends BaseFrameLayoutView implements View.OnClickListener {
+
+    /**
+     * Views
+     */
+    private ConstraintLayout respondInvitationForm;
+    private Button rejectButton;
+    private Button acceptButton;
+    private ConstraintLayout cancelRequestForm;
+    private Button cancelButton;
+    private ConstraintLayout requestForm;
+    private Button joinButton;
+    private ConstraintLayout memberForm;
+    private Button leaveButton;
+
+    /**
+     * Group information
+     */
+    private GroupInfo mInfo;
+
+    /**
+     * Listener
+     */
+    private OnGroupMembershipUpdateListener mOnGroupMembershipUpdateListener;
+
+
+    public GroupMembershipStatusView(@NonNull Context context) {
+        this(context, null);
+    }
+
+    public GroupMembershipStatusView(@NonNull Context context, @Nullable AttributeSet attrs) {
+        this(context, attrs, 0);
+    }
+
+    public GroupMembershipStatusView(@NonNull Context context, @Nullable AttributeSet attrs, int defStyleAttr) {
+        super(context, attrs, defStyleAttr);
+
+        View view = inflate(getContext(), R.layout.view_group_membership_status, this);
+        respondInvitationForm = view.findViewById(R.id.respondInvitationForm);
+        rejectButton = view.findViewById(R.id.rejectButton);
+        acceptButton = view.findViewById(R.id.acceptButton);
+        cancelRequestForm = view.findViewById(R.id.cancelRequestForm);
+        cancelButton = view.findViewById(R.id.cancelButton);
+        requestForm = view.findViewById(R.id.requestForm);
+        joinButton = view.findViewById(R.id.joinButton);
+        memberForm = view.findViewById(R.id.memberForm);
+        leaveButton = view.findViewById(R.id.leaveButton);
+
+        //Show only one form
+        showForm(respondInvitationForm);
+
+        rejectButton.setOnClickListener(this);
+        acceptButton.setOnClickListener(this);
+        cancelButton.setOnClickListener(this);
+        joinButton.setOnClickListener(this);
+        leaveButton.setOnClickListener(this);
+    }
+
+    /**
+     * Set the group membership update listener
+     *
+     * @param onGroupMembershipUpdateListener The listener
+     */
+    public void setOnGroupMembershipUpdateListener(OnGroupMembershipUpdateListener onGroupMembershipUpdateListener) {
+        this.mOnGroupMembershipUpdateListener = onGroupMembershipUpdateListener;
+    }
+
+    /**
+     * Assign the view to a new group
+     *
+     * @param info Information about the group
+     */
+    public void setGroup(GroupInfo info) {
+        mInfo = info;
+        showButtons(true);
+
+        switch (info.getMembershipLevel()) {
+            case VISITOR:
+                showForm(requestForm);
+                return;
+
+            case PENDING:
+                showForm(cancelRequestForm);
+                return;
+
+            case INVITED:
+                showForm(respondInvitationForm);
+                return;
+
+            default:
+                showForm(memberForm);
+        }
+    }
+
+    /**
+     * Display the form contained in a specific view and hide the other ones
+     *
+     * @param v The container of the form to show
+     */
+    private void showForm(View v) {
+
+        respondInvitationForm.setVisibility(v.equals(respondInvitationForm)
+                ? View.VISIBLE : View.GONE);
+        cancelRequestForm.setVisibility(v.equals(cancelRequestForm)
+                ? View.VISIBLE : View.GONE);
+        requestForm.setVisibility(v.equals(requestForm)
+                ? View.VISIBLE : View.GONE);
+        memberForm.setVisibility(v.equals(memberForm) ? View.VISIBLE : View.GONE);
+
+    }
+
+    /**
+     * Update buttons visibility
+     *
+     * @param visible New visibility for the buttons
+     */
+    private void showButtons(boolean visible){
+        rejectButton.setVisibility(visible ? View.VISIBLE : View.GONE);
+        acceptButton.setVisibility(visible ? View.VISIBLE : View.GONE);
+        cancelButton.setVisibility(visible ? View.VISIBLE : View.GONE);
+        joinButton.setVisibility(visible ? View.VISIBLE : View.GONE);
+        leaveButton.setVisibility(View.VISIBLE); //View cannot be hidden
+    }
+
+    @Override
+    public void onClick(View v) {
+
+        if(mOnGroupMembershipUpdateListener == null)
+            return;
+
+        showButtons(false);
+
+        if(v.equals(rejectButton)){
+            mOnGroupMembershipUpdateListener.onRespondInvitation(mInfo, false);
+        }
+
+        else if(v.equals(acceptButton)){
+            mOnGroupMembershipUpdateListener.onRespondInvitation(mInfo, true);
+        }
+
+        else if(v.equals(cancelButton)){
+            mOnGroupMembershipUpdateListener.onCancelRequest(mInfo);
+        }
+
+        else if (v.equals(joinButton)){
+            mOnGroupMembershipUpdateListener.onSendRequest(mInfo);
+        }
+
+        else if(v.equals(leaveButton)){
+            mOnGroupMembershipUpdateListener.onLeaveGroup(mInfo);
+        }
+
+    }
+}

app/src/main/res/layout/view_group_membership_status.xml

@@ -0,0 +1,137 @@
+<?xml version="1.0" encoding="utf-8"?>
+<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent">
+
+    <android.support.constraint.ConstraintLayout
+        android:id="@+id/respondInvitationForm"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:layout_marginEnd="8dp"
+        android:layout_marginStart="8dp"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent">
+
+        <TextView
+            android:id="@+id/textView9"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_marginEnd="8dp"
+            android:layout_marginStart="8dp"
+            android:text="@string/notice_group_invited"
+            app:layout_constraintEnd_toEndOf="@+id/acceptButton"
+            app:layout_constraintStart_toStartOf="@+id/acceptButton" />
+
+        <Button
+            android:id="@+id/rejectButton"
+            style="@style/GroupMembershipButton"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:backgroundTint="@android:color/holo_red_dark"
+            android:text="@string/action_group_reject_request"
+            android:textColor="@android:color/white"
+            app:layout_constraintEnd_toEndOf="@+id/acceptButton"
+            app:layout_constraintStart_toStartOf="@+id/acceptButton"
+            app:layout_constraintTop_toBottomOf="@+id/acceptButton" />
+
+        <Button
+            android:id="@+id/acceptButton"
+            style="@style/GroupMembershipButton"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_marginEnd="8dp"
+            android:backgroundTint="@color/holo_green_dark"
+            android:text="@string/action_group_accept_request"
+            android:textColor="@android:color/white"
+            app:layout_constraintEnd_toEndOf="parent"
+            app:layout_constraintTop_toBottomOf="@+id/textView9" />
+    </android.support.constraint.ConstraintLayout>
+
+    <android.support.constraint.ConstraintLayout
+        android:id="@+id/cancelRequestForm"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:layout_marginEnd="8dp"
+        android:layout_marginStart="8dp"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toBottomOf="@+id/respondInvitationForm">
+
+        <TextView
+            android:id="@+id/textView10"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:text="@string/notice_group_requested"
+            app:layout_constraintEnd_toEndOf="@+id/cancelButton"
+            app:layout_constraintStart_toStartOf="@+id/cancelButton"
+            app:layout_constraintTop_toTopOf="parent" />
+
+        <Button
+            android:id="@+id/cancelButton"
+            style="@style/GroupMembershipButton"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_marginBottom="8dp"
+            android:layout_marginEnd="8dp"
+            android:backgroundTint="@android:color/holo_red_dark"
+            android:text="@string/action_group_cancel_membership_request"
+            android:textColor="@android:color/white"
+            app:layout_constraintBottom_toBottomOf="parent"
+            app:layout_constraintEnd_toEndOf="parent"
+            app:layout_constraintTop_toBottomOf="@+id/textView10" />
+    </android.support.constraint.ConstraintLayout>
+
+    <android.support.constraint.ConstraintLayout
+        android:id="@+id/requestForm"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:layout_marginEnd="8dp"
+        android:layout_marginStart="8dp"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toBottomOf="@+id/cancelRequestForm">
+
+        <Button
+            android:id="@+id/joinButton"
+            style="@style/GroupMembershipButton"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_marginBottom="8dp"
+            android:layout_marginEnd="8dp"
+            android:layout_marginTop="8dp"
+            android:backgroundTint="@color/dark_blue"
+            android:text="@string/action_join_group"
+            android:textColor="@android:color/white"
+            app:layout_constraintBottom_toBottomOf="parent"
+            app:layout_constraintEnd_toEndOf="parent"
+            app:layout_constraintTop_toTopOf="parent" />
+    </android.support.constraint.ConstraintLayout>
+
+    <android.support.constraint.ConstraintLayout
+        android:id="@+id/memberForm"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:layout_marginEnd="8dp"
+        android:layout_marginStart="8dp"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toBottomOf="@+id/requestForm">
+
+        <Button
+            android:id="@+id/leaveButton"
+            style="@style/GroupMembershipButton"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_marginBottom="8dp"
+            android:layout_marginEnd="8dp"
+            android:layout_marginTop="8dp"
+            android:backgroundTint="@android:color/holo_red_dark"
+            android:text="@string/action_leave_group"
+            android:textColor="@android:color/white"
+            app:layout_constraintBottom_toBottomOf="parent"
+            app:layout_constraintEnd_toEndOf="parent"
+            app:layout_constraintTop_toTopOf="parent" />
+    </android.support.constraint.ConstraintLayout>
+</android.support.constraint.ConstraintLayout>

app/src/main/res/layout/viewholder_group.xml

@@ -13,10 +13,11 @@
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:layout_marginStart="8dp"
-        tools:text="Group Name"
         android:textSize="18sp"
+        app:layout_constraintBottom_toBottomOf="@+id/groupImage"
         app:layout_constraintStart_toEndOf="@+id/groupImage"
-        app:layout_constraintTop_toTopOf="@+id/groupImage" />
+        app:layout_constraintTop_toTopOf="@+id/groupImage"
+        tools:text="Group Name" />
 
     <org.communiquons.android.comunic.client.ui.views.GroupImageView
         android:id="@+id/groupImage"
@@ -29,4 +30,13 @@
         app:layout_constraintStart_toStartOf="parent"
         app:layout_constraintTop_toTopOf="parent"
         app:srcCompat="@drawable/ic_friends" />
+
+    <org.communiquons.android.comunic.client.ui.views.GroupMembershipStatusView
+        android:id="@+id/groupMembershipStatusView"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_marginBottom="8dp"
+        android:layout_marginEnd="8dp"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintEnd_toEndOf="parent" />
 </android.support.constraint.ConstraintLayout>

app/src/main/res/values-fr/strings.xml

@@ -300,4 +300,16 @@
     <string name="action_user_groups">Mes groupes</string>
     <string name="err_get_user_groups">Une erreur a survenu lors de la récupération de vos groupes !</string>
     <string name="notice_no_group">Vous n\'avez aucun groupe pour le moment.</string>
+    <string name="notice_group_invited">Invité</string>
+    <string name="action_group_accept_request">Accepter</string>
+    <string name="action_group_reject_request">Rejeter</string>
+    <string name="notice_group_requested">Demande envoyée</string>
+    <string name="action_group_cancel_membership_request">Annuler</string>
+    <string name="action_join_group">Rejoindre</string>
+    <string name="action_leave_group">Quitter</string>
+    <string name="dialog_leave_group_title">Quitter le groupe</string>
+    <string name="dialog_leave_group_message">Voulez-vous vraiment quitter ce groupe ? Il se peut que vous ne puissez pas le rejoindre ultérieurement !</string>
+    <string name="dialog_leave_group_cancel">Annuler</string>
+    <string name="dialog_leave_group_confirm">Quitter</string>
+    <string name="err_update_group_membership">Une erreur a survenue lors de la mise à jour de votre appartenance au groupe !</string>
 </resources>

app/src/main/res/values/colors.xml

@@ -4,7 +4,7 @@
     <color name="colorPrimaryDark">#303F9F</color>
     <color name="colorAccent">#ff4081</color>
 
-    <color name="holo_green_dark">#ff669900</color>
+    <color name="holo_green_dark">#669900</color>
     <color name="darker_gray">#aaa</color>
     <color name="darker_darker_gray">#5b5b5b</color>
     <color name="dark_blue">#303f9f</color>

app/src/main/res/values/strings.xml

@@ -299,4 +299,16 @@
     <string name="action_user_groups">My groups</string>
     <string name="err_get_user_groups">Could not get the groups of the user!</string>
     <string name="notice_no_group">You do not have any group yet.</string>
+    <string name="notice_group_invited">Invited</string>
+    <string name="action_group_accept_request">Accept</string>
+    <string name="action_group_reject_request">Reject</string>
+    <string name="notice_group_requested">Requested</string>
+    <string name="action_group_cancel_membership_request">Cancel</string>
+    <string name="action_join_group">Join</string>
+    <string name="action_leave_group">Leave</string>
+    <string name="dialog_leave_group_title">Leave group</string>
+    <string name="dialog_leave_group_message">Do you really want to leave this group? You might not be able to join it later!</string>
+    <string name="dialog_leave_group_cancel">Cancel</string>
+    <string name="dialog_leave_group_confirm">Leave</string>
+    <string name="err_update_group_membership">Could not update group membership!</string>
 </resources>

app/src/main/res/values/styles.xml

@@ -174,4 +174,10 @@
         <item name="android:padding">2dp</item>
         <item name="android:layout_gravity">center</item>
     </style>
+
+    <!-- Groups membership button -->
+    <style name="GroupMembershipButton" >
+        <item name="android:minHeight">40dip</item>
+        <item name="android:minWidth">80dip</item>
+    </style>
 </resources>