remove posts

app/src/main/java/com/dowerx/quack/fragment/PostRecyclerViewAdapter.java

@@ -3,12 +3,17 @@ package com.dowerx.quack.fragment;
 import androidx.annotation.NonNull;
 import androidx.recyclerview.widget.RecyclerView;
 
+import android.annotation.SuppressLint;
 import android.view.LayoutInflater;
 import android.view.ViewGroup;
+import android.widget.Button;
 import android.widget.TextView;
 
 import com.dowerx.quack.databinding.FragmentPostBinding;
 import com.dowerx.quack.model.Post;
+import com.dowerx.quack.service.AuthService;
+import com.dowerx.quack.service.PostService;
+
 import java.util.List;
 
 public class PostRecyclerViewAdapter extends RecyclerView.Adapter<PostRecyclerViewAdapter.ViewHolder> {
@@ -30,7 +35,21 @@ public class PostRecyclerViewAdapter extends RecyclerView.Adapter<PostRecyclerVi
         holder.mItem = mValues.get(position);
         holder.username.setText(holder.mItem.getUser().getUsername());
         holder.content.setText(holder.mItem.getContent());
-        holder.likes.setText("Likes " + holder.mItem.getLikes());
+        holder.like.setText("Likes " + holder.mItem.getLikes());
+        if (!AuthService.getId().equals(holder.mItem.getUser().getId())) {
+            holder.remove.setAlpha(0.5f);
+            holder.remove.setClickable(false);
+        } else {
+            holder.remove.setOnClickListener(v -> {
+                PostService.RemovePost task = new PostService.RemovePost(()-> {
+                    this.mValues.remove(position);
+                    this.notifyItemRemoved(position);
+                    this.notifyItemRangeChanged(position, mValues.size());
+                    return null;
+                }, v.getContext());
+                task.execute(holder.mItem.getId());
+            });
+        }
     }
 
     @Override
@@ -41,14 +60,16 @@ public class PostRecyclerViewAdapter extends RecyclerView.Adapter<PostRecyclerVi
     public class ViewHolder extends RecyclerView.ViewHolder {
         public final TextView username;
         public final TextView content;
-        public final TextView likes;
+        public final Button like;
+        public final Button remove;
         public Post mItem;
 
         public ViewHolder(@NonNull FragmentPostBinding binding) {
             super(binding.getRoot());
             username = binding.username;
             content = binding.content;
-            likes = binding.likes;
+            like = binding.like;
+            remove = binding.remove;
         }
 
         @NonNull

app/src/main/java/com/dowerx/quack/service/PostService.java

@@ -29,6 +29,7 @@ import java.util.ArrayList;
 import java.util.HashMap;
 import java.util.LinkedList;
 import java.util.List;
+import java.util.concurrent.Callable;
 import java.util.concurrent.ExecutionException;
 import java.util.concurrent.atomic.AtomicBoolean;
 
@@ -160,4 +161,43 @@ public class PostService {
             }
         }
     }
+
+    public static class RemovePost extends AsyncTask<String, Void, Boolean> {
+
+        Callable<Void> callback;
+        Context context;
+
+        public RemovePost(Callable<Void> callback, Context context) {
+            this.callback = callback;
+
+            this.context = context;
+        }
+
+        @Override
+        protected Boolean doInBackground(String... strings) {
+            FirebaseFirestore db = FirebaseFirestore.getInstance();
+            try {
+                Tasks.await(db.document("/post/"+strings[0]).delete());
+            } catch (ExecutionException | InterruptedException e) {
+                return false;
+            }
+            return true;
+        }
+
+        @Override
+        protected void onPostExecute(Boolean result) {
+            if (result) {
+                try {
+                    this.callback.call();
+                } catch (Exception e) {
+                    throw new RuntimeException(e);
+                }
+            } else {
+                Toast toast = new Toast(context);
+                toast.setDuration(Toast.LENGTH_LONG);
+                toast.setText("failed to remove post");
+                toast.show();
+            }
+        }
+    }
 }

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

@@ -10,10 +10,8 @@
         android:id="@+id/username"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
-        android:layout_marginTop="16dp"
+        android:layout_margin="20dp"
-        android:text="@string/placeholder_name"
+        android:text=""
-        app:layout_constraintEnd_toEndOf="parent"
-        app:layout_constraintHorizontal_bias="0.067"
         app:layout_constraintStart_toStartOf="parent"
         app:layout_constraintTop_toTopOf="parent" />
 
@@ -21,19 +19,35 @@
         android:id="@+id/content"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
-        android:text="some random placeeholder post content"
+        android:text=""
         app:layout_constraintTop_toBottomOf="@+id/username"
         android:layout_margin="20dp"/>
 
-    <TextView
+    <LinearLayout
-        android:id="@+id/likes"
+        android:id="@+id/post_buttons"
-        android:layout_width="wrap_content"
+        android:layout_width="match_parent"
         android:layout_height="wrap_content"
         android:layout_margin="20dp"
-        android:layout_marginTop="20dp"
-        android:text="Likes 0"
         app:layout_constraintEnd_toEndOf="parent"
-        app:layout_constraintHorizontal_bias="0.0"
         app:layout_constraintStart_toStartOf="parent"
-        app:layout_constraintTop_toBottomOf="@+id/content" />
+        app:layout_constraintTop_toBottomOf="@+id/content">
+
+        <Button
+            android:id="@+id/like"
+            android:layout_marginLeft="20dp"
+            android:layout_marginRight="20dp"
+            android:layout_weight="1"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:text="Likes 0"/>
+
+        <Button
+            android:id="@+id/remove"
+            android:layout_marginLeft="20dp"
+            android:layout_marginRight="20dp"
+            android:layout_weight="1"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:text="@string/remove_btn"/>
+    </LinearLayout>
 </androidx.constraintlayout.widget.ConstraintLayout>

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

@@ -15,4 +15,5 @@
     <!-- TODO: Remove or change this placeholder text -->
     <string name="hello_blank_fragment">Hello blank fragment</string>
     <string name="post_btn">Post</string>
+    <string name="remove_btn">Remove</string>
 </resources>