WhatsJava

WhatsJava is a reimplementation of the WhatsApp Web API and provides a direct interface for developers.

Big thanks to @Sigalor and all participants of the whatsapp-web-reveng project and @adiwajshing for the Typescript/Javascript implementation.

This project is WIP and things could break in the future.

Gradle

allprojects {
    repositories {
	...
        maven { url 'https://jitpack.io' }
    }
}

dependencies {
    implementation 'com.github.JicuNull:WhatsJava:v0.1.3-alpha'
}

Find more options here: Jitpack

How to use it

Note: The project is tested and compiled with Java 11

Connect and login

WAClient connects to the WhatsApp backend server and is used for all interactions with the server. Therefore, a new WAClient instance needs to be created first.

A path to a storage location is also required to store the keys needed to reestablish a session.

WAClient client = new WAClient("auth.json");

The session is opened by calling openConnection().

WAClient client = new WAClient("auth.json");
client.openConnection();

After a session has been successfully initialized, a qr code must be scanned from the device where WhatsApp is running on. To learn how to receive the qr code please refer to "Message handlers".

Message handlers

After a WAClient instance is initialized, the addClientActionListener method can be called to register a ClientActionInterface and receive a number of callbacks. ClientActionListener is an empty implementation of ClientActionInterface interface.

• Called when a new qr code has been generated and has to be scanned for login. A qr code has a lifetime of 20 seconds, which is why it can be generated up to five times.

client.addClientActionListener(new ClientActionListener() {
    @Override
    public void onQRCodeScanRequired(BufferedImage img) {
        save(img);
    }
    
    // ...
});

• Called if the login was successful (Code: 200) or an error occurred.

@Override
public void onReceiveLoginResponse(int httpCode) {
    if(httpCode == 200) {
        System.out.println("Logged in successfully! Code: " + httpCode);
    } else {
        System.out.println("Login failed! Code: " + httpCode);
    }
}

• Other callbacks defined in ClientActionInterface interface:

@Override
public void onWebChat(WebChat[] chats) {
    // ...
}

@Override
public void onWebContact(WebContact[] contacts) {
    // ...
}
			
@Override
public void onWebEmoji(WebEmoji[] emojis) {
    // ...
}
			
@Override
public void onWebStatus(WebStatus[] status) {
    // ...
}

@Override
public void onWebConversationMessage(WebConversationMessage conversationMessage) {
    // ...
}

@Override
public void onWebImageMessage(WebImageMessage imageMessage) {
    // ...
}

@Override
public void onWebVideoMessage(WebVideoMessage videoMessage) {
    // ...
}

Send text message

String remoteJid = "0123456789@s.whatsapp.net";

client.sendMessage(remoteJid, "Hello World");

Note:

• WhatsApp identifies a person or a group with a unique chat identification - jid.
• Chats: [country code][phone number]@s.whatsapp.net, for example 490123456789@s.whatsapp.net
• Groups: [phone number of group creator]-[timestamp of group creation]@g.us, e.g. 490123456789-1596766695@g.us

Delete sent message

Lets you delete a sent message for yourself

String remoteJid = "0123456789@s.whatsapp.net";
String messageId = "3EM04B5BA7A366D3F9AE";
boolean owner = true;
					
client.clearMessage(remoteJid, messageId, owner);

Load conversation

Queries the chat history of a conversation

// Query the last 25 messages
client.loadConversation(remoteJid, 25);

Queries the chat history after a certain message

// Query the last 25 messages after the message with the id x, which I'm not the owner of
client.loadConversation(remoteJid, 25, "4C739872E8K15F7L0ACB", false);

Objects

• WebChat: Contains information about direct chats or groups

Method	Description
getJid	Returns unique chat identification
getName	Returns your given contact name
getUnreadMessages	Returns the amount of unread messages
getLastInteraction	Returns the timestamp of the last message
isMuted	Returns if the chat is muted

• WebContact: Contains information about direct chats or groups

Method	Description
getJid	Returns unique chat identification
getName	Returns the name your contact gave to WhatsApp

• WebEmoji: Contains information about the emojis you used the most

Method	Description
getCode	Returns emoji code
getValue	Returns the frequency of use

• WebStatus: Contains a WebImageMessage or WebVideoMessage

Method	Description
isWebImageMessage	Returns true if it contains a WebImageMessage
isWebVideoMessage	Returns true if it contains a WebVideoMessage
getWebImageMessage	Returns WebImageMessage
getWebVideoMessage	Returns WebVideoMessage

• WebConversationMessage: Contains information about generic text messages

Method	Description
getText	Returns content of the message
hasQuotedTextMessage	Returns true if it contains a QuotedTextMessage
getQuotedTextMessage	Returns QuotedTextMessage

• QuotedTextMessage:

Method	Description
getText	Returns quote

• WebImageMessage: Contains information about image messages

Method	Description
getMimetype	Returns mimetype of the image
getCaption	Returns caption
getJpegThumbnail	Returns a thumbnail of the image
getJpegFullResolution	Returns the image with full resolution or null if it could not be loaded
...	...

• WebVideoMessage: Contains information about video messages

Method	Description
getMimetype	Returns mimetype of the video
getSeconds	Returns video length
getMp4Thumbnail	Returns a thumbnail of the video
getMp4FullResolution	Returns the video with full resolution or null if it could not be loaded
...	...

• WebMessage: Each Web[Type]Message class extends WebMessage and therefore contains the following methods

Method	Description
getRemoteJid	Returns unique chat identification
getId	Returns the id of a message
getFromMe	Returns true if the message is from you
getMessageTimestamp	Returns the message timestamp
getStatus	Returns the status of the message

Note: Audio and document messages are not implemented

Legal

This code is in no way affiliated with, authorized, maintained, sponsored or endorsed by WhatsApp or any of its affiliates or subsidiaries. This is an independent and unofficial software. Use at your own risk.