Fix part of #116

app/build.gradle

@@ -27,74 +27,72 @@ android {
 
 dependencies {
     implementation fileTree(dir: "libs", include: ["*.jar"])
+
+    // Language lib
+    implementation 'org.jetbrains.kotlin:kotlin-stdlib:1.4.21'
+
+    // Support
     implementation 'androidx.appcompat:appcompat:1.2.0'
-    implementation 'androidx.constraintlayout:constraintlayout:2.0.4'
-    implementation 'com.google.android.material:material:1.3.0'
     implementation 'androidx.legacy:legacy-support-v4:1.0.0'
-    implementation 'com.google.firebase:firebase-storage:19.2.2'
-    testImplementation 'junit:junit:4.13.1'
-    implementation 'com.airbnb.android:lottie:3.6.1'
-    androidTestImplementation 'androidx.test.ext:junit:1.1.2'
-    androidTestImplementation 'androidx.test.espresso:espresso-core:3.3.0'
-    implementation 'com.firebaseui:firebase-ui-firestore:6.2.1'
-    implementation 'com.google.firebase:firebase-database:19.7.0'
+    implementation 'com.google.android.material:material:1.3.0'
+
+    //Android Jetpack Navigation
+    implementation "androidx.navigation:navigation-fragment:2.3.4"
+    implementation "androidx.navigation:navigation-ui:2.3.4"
+
+    // Custom View
+    implementation 'androidx.constraintlayout:constraintlayout:2.0.4'
     implementation 'de.hdodenhof:circleimageview:3.1.0'
+    implementation 'com.ismaeldivita.chipnavigation:chip-navigation-bar:1.3.4'
+    implementation 'com.github.TalbotGooday:AvatarView:0.0.2'
     implementation 'com.github.cachapa:ExpandableLayout:2.9.2'
 
+    // Firebase core
     implementation platform('com.google.firebase:firebase-bom:26.1.0')
-    implementation 'com.squareup.picasso:picasso:2.71828'
-    androidTestImplementation 'androidx.test:runner:1.3.0'
-    androidTestImplementation 'androidx.test.espresso:espresso-core:3.3.0'
-    implementation 'com.google.android.gms:play-services-base:17.6.0'
-    implementation 'com.google.android.libraries.places:places:2.4.0'
-    implementation 'com.google.android.gms:play-services-maps:17.0.0'
-    implementation 'com.squareup.picasso:picasso:2.71828'
-    implementation 'com.google.android.gms:play-services-location:18.0.0'
-    // FirebaseUI for Firebase Realtime Database
-    implementation 'com.firebaseui:firebase-ui-database:6.3.0'
+    implementation 'com.google.firebase:firebase-storage'
+    implementation 'com.google.firebase:firebase-database'
+    implementation 'com.google.firebase:firebase-core'
+    implementation 'com.google.firebase:firebase-firestore'
+    implementation 'com.google.firebase:firebase-analytics'
+    implementation 'com.google.firebase:firebase-auth'
+    implementation 'com.firebase:firebase-client-android:2.3.1'
 
-    // FirebaseUI for Cloud Firestore
+    // Firebase UI
+    implementation 'com.firebaseui:firebase-ui-firestore:6.2.1'
+    implementation 'com.firebaseui:firebase-ui-database:6.3.0'
     implementation 'com.firebaseui:firebase-ui-firestore:6.2.1'
-
-    // FirebaseUI for Firebase Auth
     implementation 'com.firebaseui:firebase-ui-auth:6.2.1'
-
-    // FirebaseUI for Cloud Storage
     implementation 'com.firebaseui:firebase-ui-storage:6.2.1'
 
-    implementation 'com.google.firebase:firebase-core:18.0.2'
-    implementation 'com.google.firebase:firebase-firestore:22.1.2'
-    implementation 'com.google.firebase:firebase-analytics:18.0.2'
-    androidTestImplementation 'androidx.test.espresso:espresso-core:3.3.0'
-    implementation 'com.google.firebase:firebase-auth:20.0.3'
+    // Play services
     implementation 'com.google.android.gms:play-services-auth:19.0.0'
-    implementation 'com.google.firebase:firebase-database:19.7.0'
-
-    implementation 'com.firebase:firebase-client-android:2.3.1'
-
-    //Android Jetpack Navigation
-    implementation "androidx.navigation:navigation-fragment:2.3.4"
-    implementation "androidx.navigation:navigation-ui:2.3.4"
+    implementation 'com.google.android.gms:play-services-base:17.6.0'
+    implementation 'com.google.android.libraries.places:places:2.4.0'
+    implementation 'com.google.android.gms:play-services-maps:17.0.0'
+    implementation 'com.google.android.gms:play-services-location:18.0.0'
 
-    //Glide
+    // Network loading
+    implementation 'com.squareup.picasso:picasso:2.71828'
     implementation 'com.github.bumptech.glide:glide:4.11.0'
     annotationProcessor 'com.github.bumptech.glide:compiler:4.11.0'
-    implementation 'com.google.android.gms:play-services-auth:19.0.0'
+    implementation 'com.android.volley:volley:1.2.0'
+    implementation 'io.github.ponnamkarthik:richlinkpreview:1.0.9'
+    implementation 'org.jsoup:jsoup:1.10.2'
 
-    //custom Bottom nav bar
-    implementation 'com.ismaeldivita.chipnavigation:chip-navigation-bar:1.3.4'
-    implementation 'org.jetbrains.kotlin:kotlin-stdlib:1.4.21'
+    implementation 'com.airbnb.android:lottie:3.6.1'
 
     //App Intro
     implementation 'com.github.AppIntro:AppIntro:6.1.0'
+
     //EasyPref
     implementation 'com.pixplicity.easyprefs:library:1.9.0'
+
     //Animatoo Library
     implementation 'com.github.mohammadatif:Animatoo:master'
-    //Volley
-    implementation 'com.android.volley:volley:1.2.0'
-
-    implementation 'io.github.ponnamkarthik:richlinkpreview:1.0.9'
-    implementation 'org.jsoup:jsoup:1.10.2'
 
+    // Testing
+    testImplementation 'junit:junit:4.13.1'
+    androidTestImplementation 'androidx.test.ext:junit:1.1.2'
+    androidTestImplementation 'androidx.test.espresso:espresso-core:3.3.0'
+    androidTestImplementation 'androidx.test:runner:1.3.0'
 }

app/src/main/AndroidManifest.xml

@@ -2,8 +2,7 @@
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
     package="com.cswala.cswala">
 
-    <uses-permission android:name="android.permission.INTERNET"/>
-
+    <uses-permission android:name="android.permission.INTERNET" />
     <application
         android:name=".utils.MyApplication"
         android:allowBackup="true"
@@ -12,7 +11,6 @@
         android:roundIcon="@mipmap/ic_launcher_round"
         android:supportsRtl="true"
         android:theme="@style/AppTheme">
-
         <activity android:name=".Activities.ResetPassword"></activity>
         <activity android:name=".Activities.Register" />
         <activity android:name=".Activities.LoginWithEmail" />

app/src/main/java/com/cswala/cswala/Adapters/MessageAdapter.java

@@ -0,0 +1,56 @@
+package com.cswala.cswala.Adapters;
+
+import android.content.Context;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+
+import androidx.annotation.NonNull;
+
+import com.cswala.cswala.R;
+import com.cswala.cswala.Models.Message;
+import com.cswala.cswala.utils.MessageListener;
+import com.cswala.cswala.viewholders.MessageHolder;
+import com.firebase.ui.database.FirebaseRecyclerAdapter;
+import com.firebase.ui.database.FirebaseRecyclerOptions;
+import com.google.firebase.database.DatabaseError;
+
+public class MessageAdapter extends FirebaseRecyclerAdapter<Message, MessageHolder> {
+
+    private final MessageListener messageListener;
+    private final String uId;
+    private final Context context;
+
+    public MessageAdapter(@NonNull FirebaseRecyclerOptions<Message> options, MessageListener messageListener, String uId, Context context) {
+        super(options);
+        this.messageListener = messageListener;
+        this.uId = uId;
+        this.context = context;
+    }
+
+    @Override
+    protected void onBindViewHolder(@NonNull MessageHolder holder, int position, @NonNull Message model) {
+        holder.bind(model, uId);
+    }
+
+    @Override
+    public void onError(@NonNull DatabaseError error) {
+        super.onError(error);
+    }
+
+    @Override
+    public void onDataChanged() {
+        super.onDataChanged();
+        messageListener.onMessageReceived();
+    }
+
+
+
+    @NonNull
+    @Override
+    public MessageHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
+        View view = LayoutInflater.from(parent.getContext())
+                .inflate(R.layout.message_item_view, parent, false);
+        return new MessageHolder(view, context);
+    }
+}

app/src/main/java/com/cswala/cswala/Fragments/CommunityFragment.java

@@ -1,23 +1,177 @@
 package com.cswala.cswala.Fragments;
 
+import android.content.Context;
 import android.os.Bundle;
-
-import androidx.fragment.app.Fragment;
-
+import android.text.Editable;
+import android.text.TextWatcher;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
+import android.view.inputmethod.InputMethodManager;
+import android.widget.EditText;
+import android.widget.FrameLayout;
+import android.widget.LinearLayout;
+
+import androidx.annotation.NonNull;
+import androidx.annotation.Nullable;
+import androidx.appcompat.widget.AppCompatImageButton;
+import androidx.fragment.app.Fragment;
+import androidx.recyclerview.widget.LinearLayoutManager;
+import androidx.recyclerview.widget.RecyclerView;
 
 import com.cswala.cswala.R;
+import com.cswala.cswala.Adapters.MessageAdapter;
+import com.cswala.cswala.observer.ScrollToBottomObserver;
+import com.cswala.cswala.Models.Message;
+import com.cswala.cswala.utils.MessageListener;
+import com.firebase.ui.database.FirebaseRecyclerOptions;
+import com.google.android.material.snackbar.Snackbar;
+import com.google.firebase.auth.FirebaseAuth;
+import com.google.firebase.database.DatabaseError;
+import com.google.firebase.database.DatabaseReference;
+import com.google.firebase.database.FirebaseDatabase;
+import com.google.firebase.database.Query;
+
+import java.util.Date;
 
 
 public class CommunityFragment extends Fragment {
 
+    private EditText msgInput;
+    private AppCompatImageButton sendBtn;
+    private MessageAdapter adapter;
+    private FirebaseDatabase database;
+    private FirebaseAuth auth;
+    private RecyclerView chatRv;
+    private LinearLayout sendMsgContainer;
+    private FrameLayout progContainer;
 
     @Override
     public View onCreateView(LayoutInflater inflater, ViewGroup container,
                              Bundle savedInstanceState) {
-
         return inflater.inflate(R.layout.fragment_community, container, false);
     }
+
+    @Override
+    public void onViewCreated(@NonNull final View view, @Nullable Bundle savedInstanceState) {
+        chatRv = view.findViewById(R.id.chat_rv);
+        msgInput = view.findViewById(R.id.msg_input);
+        sendBtn = view.findViewById(R.id.send_btn);
+        sendMsgContainer = view.findViewById(R.id.send_msg_container);
+        progContainer = view.findViewById(R.id.prog_container);
+
+        MessageListener messageListener = new MessageListener() {
+            @Override
+            public void onMessageReceived() {
+                progContainer.setVisibility(View.GONE);
+            }
+
+            @Override
+            public void onError(DatabaseError error) {
+                Snackbar.make(view, "Some error occurred", Snackbar.LENGTH_SHORT).show();
+            }
+        };
+
+        database = FirebaseDatabase.getInstance();
+        auth = FirebaseAuth.getInstance();
+
+//        chatRv.setVisibility(View.GONE);
+//        sendMsgContainer.setVisibility(View.GONE);
+        progContainer.setVisibility(View.VISIBLE);
+
+        Query query = database
+                .getReference()
+                .child("chats")
+                .limitToLast(50);
+
+        FirebaseRecyclerOptions<Message> options =
+                new FirebaseRecyclerOptions.Builder<Message>()
+                        .setQuery(query, Message.class)
+                        .build();
+
+        LinearLayoutManager llm = new LinearLayoutManager(getContext());
+        llm.setStackFromEnd(true);
+        chatRv.setLayoutManager(llm);
+
+        adapter = new MessageAdapter(options, messageListener, auth.getCurrentUser().getUid(), getContext());
+        chatRv.setAdapter(adapter);
+        adapter.registerAdapterDataObserver(new ScrollToBottomObserver(chatRv, adapter, llm));
+
+        sendBtn.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                String content = msgInput.getText().toString().trim();
+                if (content.equals("")) return;
+
+                closeKeyboard();
+                DatabaseReference ref = database.getReference().child("chats").push();
+
+                String msgId = ref.getKey();
+                String senderId = auth.getCurrentUser().getUid();
+                String senderName = auth.getCurrentUser().getDisplayName();
+
+                if (senderName == null || senderName.trim().equals("")) {
+                    senderName = "Unknown";
+                }
+
+                Message message = new Message(msgId, senderName, senderId, content, new Date().getTime());
+
+                ref.setValue(message);
+
+
+                msgInput.setText("");
+
+            }
+        });
+        msgInput.addTextChangedListener(new TextWatcher() {
+            boolean prevEmpty = true;
+
+            @Override
+            public void beforeTextChanged(CharSequence s, int start, int count, int after) {
+            }
+
+            @Override
+            public void onTextChanged(CharSequence s, int start, int before, int count) {
+            }
+
+            @Override
+            public void afterTextChanged(Editable s) {
+                final boolean isEmpty = s.toString().trim().equals("");
+                if (isEmpty == prevEmpty) return;
+                prevEmpty = isEmpty;
+
+                if (isEmpty) {
+                    sendBtn.setVisibility(View.GONE);
+                } else {
+                    sendBtn.setVisibility(View.VISIBLE);
+                }
+            }
+        });
+    }
+
+    @Override
+    public void onStart() {
+        super.onStart();
+        if (adapter != null) {
+            adapter.startListening();
+        }
+    }
+
+    @Override
+    public void onStop() {
+        super.onStop();
+        if (adapter != null) {
+            adapter.stopListening();
+        }
+    }
+
+    private void closeKeyboard() {
+        try {
+            View view = getActivity().getCurrentFocus();
+            if (view != null) {
+                InputMethodManager imm = (InputMethodManager) getContext().getSystemService(Context.INPUT_METHOD_SERVICE);
+                imm.hideSoftInputFromWindow(view.getWindowToken(), 0);
+            }
+        } catch(Exception ignored) {}
+    }
 }

app/src/main/java/com/cswala/cswala/MainActivity.java

@@ -2,8 +2,6 @@
 
 import android.content.Intent;
 import android.os.Bundle;
-import android.view.View;
-import android.widget.TextView;
 
 import androidx.appcompat.app.AppCompatActivity;
 import androidx.fragment.app.Fragment;