feat: WA Business Labels support (#407)

* Get all labels
* Get chats by label
* Get labels assigned to chats

Co-authored-by: Pedro S. Lopez <pslamoros@hotmail.com>
Co-authored-by: Pedro Lopez <pedroslopez@me.com>

src/Client.js

@@ -11,7 +11,7 @@ const { WhatsWebURL, DefaultOptions, Events, WAState } = require('./util/Constan
 const { ExposeStore, LoadUtils } = require('./util/Injected');
 const ChatFactory = require('./factories/ChatFactory');
 const ContactFactory = require('./factories/ContactFactory');
-const { ClientInfo, Message, MessageMedia, Contact, Location, GroupNotification } = require('./structures');
+const { ClientInfo, Message, MessageMedia, Contact, Location, GroupNotification , Label } = require('./structures');
 /**
  * Starting point for interacting with the WhatsApp Web API
  * @extends {EventEmitter}
@@ -749,6 +749,63 @@ class Client extends EventEmitter {
         return { gid: createRes.gid, missingParticipants };
     }
 
+    /**
+     * Get all current Labels
+     * @returns {Promise<Array<Label>>}
+     */
+    async getLabels() {
+        const labels = await this.pupPage.evaluate(async () => {
+            return window.WWebJS.getLabels();
+        }); 
+
+        return labels.map(data => new Label(this , data));
+    }
+
+    /**
+     * Get Label instance by ID
+     * @param {string} labelId
+     * @returns {Promise<Label>}
+     */
+    async getLabelById(labelId) {
+        const label = await this.pupPage.evaluate(async (labelId) => {
+            return window.WWebJS.getLabel(labelId);
+        }, labelId); 
+
+        return new Label(this, label);
+    }
+
+    /**
+     * Get all Labels assigned to a chat 
+     * @param {string} chatId
+     * @returns {Promise<Array<Label>>}
+     */
+    async getChatLabels(chatId){
+        const labels = await this.pupPage.evaluate(async (chatId) => {
+            return window.WWebJS.getChatLabels(chatId);
+        }, chatId);
+
+        return labels.map(data => new Label(this, data)); 
+    }
+
+    /**
+     * Get all Chats for a specific Label
+     * @param {string} labelId
+     * @returns {Promise<Array<Chat>>}
+     */
+    async getChatsByLabelId(labelId){
+        const chatIds = await this.pupPage.evaluate(async (labelId) => {
+            const label = window.Store.Label.get(labelId);
+            const labelItems = label.labelItemCollection.models;
+            return labelItems.reduce((result, item) => {
+                if(item.parentType === 'Chat'){  
+                    result.push(item.parentId);
+                }
+                return result;
+            },[]);
+        }, labelId);
+
+        return Promise.all(chatIds.map(id => this.getChatById(id)));
+    }
 }
 
 module.exports = Client;

src/structures/Chat.js

@@ -229,6 +229,14 @@ class Chat extends Base {
     async getContact() {
         return await this.client.getContactById(this.id._serialized);
     }
+
+    /**
+     * Returns array of all Labels assigned to this Chat
+     * @returns {Promise<Array<Label>>}
+     */
+    async getLabels() {
+        return this.client.getChatLabels(this.id._serialized);
+    }
 }
 
 module.exports = Chat;

src/structures/Label.js

@@ -0,0 +1,50 @@
+'use strict';
+
+const Base = require('./Base');
+// eslint-disable-next-line no-unused-vars
+const Chat = require('./Chat');
+
+/**
+ * WhatsApp Business Label information
+ */
+class Label extends Base {
+    /**
+     * @param {Base} client
+     * @param {object} labelData
+     */
+    constructor(client, labelData){
+        super(client);
+
+        if(labelData) this._patch(labelData);
+    }
+
+    _patch(labelData){
+        /**
+         * Label ID
+         * @type {string}
+         */
+        this.id = labelData.id;
+
+        /**
+         * Label name
+         * @type {string}
+         */
+        this.name = labelData.name;
+
+        /**
+         * Label hex color
+         * @type {string}
+         */
+        this.hexColor = labelData.hexColor;
+    }
+    /**
+     * Get all chats that have been assigned this Label
+     * @returns {Promise<Array<Chat>>>}
+     */
+    async getChats(){
+        return this.client.getChatsByLabelId(this.id);
+    }
+
+}
+
+module.exports = Label;

src/structures/index.js

@@ -10,5 +10,6 @@ module.exports = {
     MessageMedia: require('./MessageMedia'),
     PrivateChat: require('./PrivateChat'),
     PrivateContact: require('./PrivateContact'),
-    GroupNotification: require('./GroupNotification')
+    GroupNotification: require('./GroupNotification'),
+    Label: require('./Label.js')
 };

src/util/Injected.js

@@ -29,6 +29,7 @@ exports.ExposeStore = (moduleRaidStr) => {
     window.Store.WidFactory = window.mR.findModule('createWid')[0];
     window.Store.BlockContact = window.mR.findModule('blockContact')[0];
     window.Store.GroupMetadata = window.mR.findModule((module) => module.default && module.default.handlePendingInvite)[0].default;
+    window.Store.Label = window.mR.findModule('LabelCollection')[0].default;
 };
 
 exports.LoadUtils = () => {
@@ -363,6 +364,27 @@ exports.LoadUtils = () => {
         return true;
     };
 
+    window.WWebJS.getLabelModel = label => {
+        let res = label.serialize();
+        res.hexColor = label.hexColor;
+        
+        return res;
+    };
+
+    window.WWebJS.getLabels = () => {
+        const labels = window.Store.Label.models;
+        return labels.map(label => window.WWebJS.getLabelModel(label));
+    };
+
+    window.WWebJS.getLabel = (labelId) => {
+        const label = window.Store.Label.get(labelId);
+        return window.WWebJS.getLabelModel(label);
+    };
+
+    window.WWebJS.getChatLabels = async (chatId) => {
+        const chat = await window.WWebJS.getChat(chatId);
+        return (chat.labels || []).map(id => window.WWebJS.getLabel(id));
+    };
 };
 
 exports.MarkAllRead = () => {