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Overview

The Chat API provides real-time messaging functionality using Firebase Realtime Database, enabling seamless communication between managers and salespersons in the Sales Management App.

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ChatRoom

Activity that manages the chat room interface for viewing and sending messages. Package: project.avishkar.salesmanagement.Chat

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Key Features

  • Real-time message synchronization
  • Firebase integration for persistent messaging
  • RecyclerView-based message display
  • Automatic message list updates

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Properties

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recyclerView
RecyclerView
Displays the list of chat messages
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messageListAdapter
ChatRoomAdapter
Adapter for rendering messages in the RecyclerView
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sendButton
Button
Button to send messages
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chatBox
EditText
Input field for composing messages
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SalespersonName
String
Name of the salesperson in the chat
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ManagerNumber
String
Manager’s unique identifier for the chat room

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Methods

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onCreate()

Initializes the chat room activity and sets up Firebase listeners. 
@Override
protected void onCreate(@Nullable Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.list_view_personal_chat);
    
    recyclerView = findViewById(R.id.recylerview_message_list);
    sendButton = findViewById(R.id.button_chatbox_send);
    chatBox = findViewById(R.id.edittext_chatbox);
    
    databaseReference = FirebaseDatabase.getInstance()
        .getReference("ChatRoom");
}
The timestamp is calculated using System.currentTimeMillis() / 1000 - 19800 to adjust for timezone offset.

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PersonalChatActivityManager

Activity for managers to engage in one-on-one chat with salespersons. Package: project.avishkar.salesmanagement.Chat

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Key Features

  • Personal messaging between manager and salesperson
  • Smooth scrolling to latest messages
  • Real-time message updates
  • Session management integration

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Properties

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recyclerView
RecyclerView
Displays the message list
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messageListAdapter
MessageListAdapter
Adapter for message rendering
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SalespersonName
String
Name of the salesperson
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ManagerName
String
Name of the manager
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tmp1
String
Sanitized manager name (whitespace removed)
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tmp2
String
Sanitized salesperson name (whitespace removed)

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Implementation Details

// Chat room identifier format
String chatKey = tmp1 + "-" + tmp2;
// Example: "JohnManager-JaneSalesperson"

databaseReference.child(chatKey).addChildEventListener(...);
The activity automatically scrolls to the latest message using recyclerView.smoothScrollToPosition(mMessages.size()-1)

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PersonalChatActivitySalesperson

Activity for salespersons to chat with their assigned manager. Package: project.avishkar.salesmanagement.Chat

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Key Features

  • Salesperson-side personal messaging
  • Firebase real-time synchronization
  • Message validation
  • Session-aware messaging

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Properties

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recyclerView
RecyclerView
Displays the conversation messages
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messageListAdapter
MessageListAdapter
Handles message list rendering
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sendButton
Button
Triggers message sending
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chatBox
EditText
Text input for message composition
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databaseReference
DatabaseReference
Firebase reference to ChatsTable

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Message Structure

Messages are stored using the BaseMessage model: 
public class BaseMessage {
    String message;      // Message content
    String senderName;   // Sender's name
    String msgRole;      // Sender's role (manager/salesperson)
    String createdAt;    // Timestamp
    
    public BaseMessage(String message, String createdAt, 
                      String senderName, String msgRole) {
        this.message = message;
        this.senderName = senderName;
        this.createdAt = createdAt;
        this.msgRole = msgRole;
    }
}

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Validation

The activity includes message validation: 
if (!message.equals("")) {
    // Send message
    BaseMessage baseMessage = new BaseMessage(
        message, 
        ts, 
        SalespersonName, 
        mp.get("role")
    );
    // Push to Firebase
} else {
    Toast.makeText(
        getApplicationContext(), 
        "message is empty!!", 
        Toast.LENGTH_SHORT
    ).show();
}

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Firebase Structure

The chat system uses two main Firebase paths:
  • ChatRoom: For group chat rooms identified by manager number
  • ChatsTable: For personal one-on-one conversations identified by ManagerName-SalespersonName
All chat activities use SessionManager to retrieve current user details including ID and role.

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