likes
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parent
2ffc8db200
commit
093883d40e
@ -4,6 +4,7 @@ import androidx.annotation.NonNull;
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import androidx.recyclerview.widget.RecyclerView;
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import androidx.recyclerview.widget.RecyclerView;
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import android.annotation.SuppressLint;
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import android.annotation.SuppressLint;
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import android.graphics.Color;
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import android.view.LayoutInflater;
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import android.view.LayoutInflater;
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import android.view.ViewGroup;
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import android.view.ViewGroup;
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import android.widget.Button;
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import android.widget.Button;
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@ -35,7 +36,26 @@ public class PostRecyclerViewAdapter extends RecyclerView.Adapter<PostRecyclerVi
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holder.mItem = mValues.get(position);
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holder.mItem = mValues.get(position);
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holder.username.setText(holder.mItem.getUser().getUsername());
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holder.username.setText(holder.mItem.getUser().getUsername());
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holder.content.setText(holder.mItem.getContent());
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holder.content.setText(holder.mItem.getContent());
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holder.like.setText((holder.mItem.isLiked() ? "Liked " : "Likes ") + holder.mItem.getLikes());
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holder.like.setBackgroundColor(holder.mItem.isLiked() ? Color.rgb(36, 166, 71) : Color.rgb(173, 33, 61));
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holder.like.setOnClickListener(v -> {
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PostService.ToggleLike task = new PostService.ToggleLike(
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()->{
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holder.mItem.setLikes(holder.mItem.getLikes()+1);
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holder.like.setText("Liked " + holder.mItem.getLikes());
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holder.like.setBackgroundColor(Color.rgb(36, 166, 71));
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return null;
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},
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()->{
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holder.mItem.setLikes(holder.mItem.getLikes()-1);
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holder.like.setText("Likes " + holder.mItem.getLikes());
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holder.like.setText("Likes " + holder.mItem.getLikes());
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holder.like.setBackgroundColor(Color.rgb(173, 33, 61));
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return null;
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},
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v.getContext());
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task.execute(holder.mItem.getId(), AuthService.getId());
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});
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if (!AuthService.getId().equals(holder.mItem.getUser().getId())) {
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if (!AuthService.getId().equals(holder.mItem.getUser().getId())) {
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holder.remove.setAlpha(0.5f);
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holder.remove.setAlpha(0.5f);
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holder.remove.setClickable(false);
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holder.remove.setClickable(false);
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@ -18,6 +18,7 @@ import com.google.android.gms.tasks.Task;
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import com.google.android.gms.tasks.Tasks;
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import com.google.android.gms.tasks.Tasks;
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import com.google.firebase.auth.FirebaseAuth;
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import com.google.firebase.auth.FirebaseAuth;
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import com.google.firebase.firestore.CollectionReference;
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import com.google.firebase.firestore.CollectionReference;
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import com.google.firebase.firestore.DocumentReference;
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import com.google.firebase.firestore.DocumentSnapshot;
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import com.google.firebase.firestore.DocumentSnapshot;
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import com.google.firebase.firestore.Filter;
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import com.google.firebase.firestore.Filter;
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import com.google.firebase.firestore.FirebaseFirestore;
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import com.google.firebase.firestore.FirebaseFirestore;
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@ -52,12 +53,24 @@ public class PostService {
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String username = user.get("username", String.class);
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String username = user.get("username", String.class);
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String email = user.get("email", String.class);
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String email = user.get("email", String.class);
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String id = user.get("id", String.class);
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String id = user.get("id", String.class);
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QuerySnapshot likes = Tasks.await(
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db.collection("like")
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.where(Filter.equalTo("post", post.getReference()))
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.get());
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boolean liked = false;
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for (DocumentSnapshot like : likes) {
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if (Tasks.await(like.getDocumentReference("user").get()).getString("id").equals(AuthService.getId()))
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liked = true;
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}
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posts.add(new Post(
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posts.add(new Post(
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new User(username, email, id),
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new User(username, email, id),
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post.get("content", String.class),
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post.get("content", String.class),
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post.get("image", String.class),
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post.get("image", String.class),
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0,
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likes.size(),
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false,
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liked,
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post.getId()
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post.getId()
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));
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));
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}
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}
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@ -96,12 +109,24 @@ public class PostService {
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String username = user.get("username", String.class);
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String username = user.get("username", String.class);
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String email = user.get("email", String.class);
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String email = user.get("email", String.class);
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String id = user.get("id", String.class);
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String id = user.get("id", String.class);
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QuerySnapshot likes = Tasks.await(
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db.collection("like")
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.where(Filter.equalTo("post", post.getReference()))
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.get());
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boolean liked = false;
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for (DocumentSnapshot like : likes) {
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if (Tasks.await(like.getDocumentReference("user").get()).getString("id").equals(AuthService.getId()))
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liked = true;
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}
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posts.add(new Post(
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posts.add(new Post(
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new User(username, email, id),
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new User(username, email, id),
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post.get("content", String.class),
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post.get("content", String.class),
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post.get("image", String.class),
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post.get("image", String.class),
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0,
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likes.size(),
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false,
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liked,
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post.getId()
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post.getId()
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));
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));
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}
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}
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@ -200,4 +225,85 @@ public class PostService {
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}
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}
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}
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}
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}
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}
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// post_id, user_id
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public static class ToggleLike extends AsyncTask<String, Void, Integer> {
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private static final Integer LIKED = 0;
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private static final Integer DISLIKED = 1;
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private static final Integer ERROR = -1;
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private final Callable<Void> callback_liked;
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private final Callable<Void> callback_disliked;
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private final Context context;
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public ToggleLike(Callable<Void> callback_liked, Callable<Void> callback_disliked, Context context) {
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this.callback_liked = callback_liked;
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this.callback_disliked = callback_disliked;
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this.context = context;
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}
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@Override
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protected Integer doInBackground(String... strings) {
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FirebaseFirestore db = FirebaseFirestore.getInstance();
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try {
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DocumentReference post = db.document("/post/" + strings[0]);
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DocumentReference user = Tasks.await(
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db.collection("user")
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.where(Filter.equalTo("id", strings[1]))
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.get())
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.getDocuments().get(0).getReference();
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QuerySnapshot result = Tasks.await(
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db.collection("like")
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.where(Filter.equalTo("post", post))
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.where(Filter.equalTo("user", user))
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.get());
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// not liked yet, like it
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if (result.isEmpty()) {
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HashMap<String, Object> data = new HashMap<>();
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data.put("post", post);
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data.put("user", user);
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Tasks.await(db.collection("like").add(data));
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return LIKED;
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}
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// already liked, remove the like
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else {
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for (DocumentSnapshot doc : result) {
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Tasks.await(doc.getReference().delete());
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}
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return DISLIKED;
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}
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} catch (ExecutionException | InterruptedException e) {
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return ERROR;
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}
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}
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@Override
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protected void onPostExecute(Integer result) {
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try {
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if (result == LIKED)
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this.callback_liked.call();
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else if (result == DISLIKED)
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this.callback_disliked.call();
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else {
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Log.e(this.getClass().getName(), "failed to toggle like");
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Toast toast = new Toast(context);
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toast.setText("failed to toggle likes");
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toast.setDuration(Toast.LENGTH_LONG);
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toast.show();
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}
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} catch (Exception e) {
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Log.e(this.getClass().getName(), "failed in callbacks while attempting to toggle like");
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Toast toast = new Toast(context);
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toast.setText("failed to toggle likes");
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toast.setDuration(Toast.LENGTH_LONG);
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toast.show();
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}
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}
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}
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}
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}
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