Added method to block/unblock user (close #233)

README.md

@@ -433,6 +433,11 @@ await conn.toggleDisappearingMessages(jid, 0)
 
     const response2 = await conn.searchMessages ('so cool', '1234@c.us', 25, 1) // search in given chat
     ```
+- To block or unblock user
+    ``` ts
+    await conn.blockUser ("xyz@c.us", "add") // Block user
+    await conn.blockUser ("xyz@c.us", "remove") // Unblock user
+    ```
 Of course, replace ``` xyz ``` with an actual ID. 
 
 ## Groups

src/Tests/Tests.Misc.ts

@@ -258,4 +258,30 @@ WAConnectionTest('Misc', conn => {
         )
         assert.ok(msg.message.extendedTextMessage)
     })
+    it('should block & unblock a user', async () => {
+        const blockedCount = conn.blocklist.length;
+
+        const waitForEventAdded = new Promise<void> (resolve => {
+            conn.once ('blocklist-update', ({added}) => {
+                assert.ok (added.length)
+                resolve ()
+            })
+        })
+
+        await conn.blockUser (testJid, 'add')
+        assert.strictEqual(conn.blocklist.length, blockedCount + 1);
+        await waitForEventAdded
+
+        await delay (2000)
+        const waitForEventRemoved = new Promise<void> (resolve => {
+            conn.once ('blocklist-update', ({removed}) => {
+                assert.ok (removed.length)
+                resolve ()
+            })
+        })
+
+        await conn.blockUser (testJid, 'remove')
+        assert.strictEqual(conn.blocklist.length, blockedCount);
+        await waitForEventRemoved
+    })
 })

src/WAConnection/0.Base.ts

@@ -66,6 +66,7 @@ export class WAConnection extends EventEmitter {
     lastChatsReceived: Date
     chats = new KeyedDB (Utils.waChatKey(false), value => value.jid)
     contacts: { [k: string]: WAContact } = {}
+    blocklist: string[] = [];
 
     /** Data structure of tokens & IDs used to establish one's identiy to WhatsApp Web */
     protected authInfo: AuthenticationCredentials = null

src/WAConnection/4.Events.ts

@@ -1,6 +1,6 @@
 import * as QR from 'qrcode-terminal'
 import { WAConnection as Base } from './3.Connect'
-import { WAMessageStatusUpdate, WAMessage, WAContact, WAChat, WAMessageProto, WA_MESSAGE_STUB_TYPE, WA_MESSAGE_STATUS_TYPE, PresenceUpdate, BaileysEvent, DisconnectReason, WAOpenResult, Presence, AuthenticationCredentials, WAParticipantAction, WAGroupMetadata, WAUser, WANode, WAPresenceData, WAChatUpdate } from './Constants'
+import { WAMessageStatusUpdate, WAMessage, WAContact, WAChat, WAMessageProto, WA_MESSAGE_STUB_TYPE, WA_MESSAGE_STATUS_TYPE, PresenceUpdate, BaileysEvent, DisconnectReason, WAOpenResult, Presence, AuthenticationCredentials, WAParticipantAction, WAGroupMetadata, WAUser, WANode, WAPresenceData, WAChatUpdate, BlocklistUpdate } from './Constants'
 import { whatsappID, unixTimestampSeconds, isGroupID, GET_MESSAGE_ID, WA_MESSAGE_ID, waMessageKey, newMessagesDB, shallowChanges, toNumber } from './Utils'
 import KeyedDB from '@adiwajshing/keyed-db'
 import { Mutex } from './Mutex'
@@ -352,6 +352,20 @@ export class WAConnection extends Base {
         this.on('CB:MsgInfo', func)
         
         this.on ('qr', qr => QR.generate(qr, { small: true }))
+
+        // blocklist updates
+        this.on('CB:Blocklist', json => {
+            json = json[1]
+            const initial = this.blocklist
+            this.blocklist = json.blocklist
+
+            const added = this.blocklist.filter(id => !initial.includes(id))
+            const removed = initial.filter(id => !this.blocklist.includes(id))
+
+            const update: BlocklistUpdate = { added, removed }
+
+            this.emit('blocklist-update', update)
+        })
     }
     /** Get the URL to download the profile picture of a person/group */
     @Mutex (jid => jid)
@@ -655,6 +669,8 @@ export class WAConnection extends Base {
     on (event: 'group-update', listener: (update: Partial<WAGroupMetadata> & {jid: string, actor?: string}) => void): this
     /** when WA sends back a pong */
     on (event: 'received-pong', listener: () => void): this
+    /** when a user is blocked or unblockd */
+    on (event: 'blocklist-update', listener: (update: BlocklistUpdate) => void): this
 
     on (event: BaileysEvent | string, listener: (json: any) => void): this
 

src/WAConnection/5.User.ts

@@ -1,5 +1,5 @@
 import {WAConnection as Base} from './4.Events'
-import { Presence, WABroadcastListInfo, WAProfilePictureChange, WALoadChatOptions, WAChatIndex } from './Constants'
+import { Presence, WABroadcastListInfo, WAProfilePictureChange, WALoadChatOptions, WAChatIndex, BlocklistUpdate } from './Constants'
 import {
     WAMessage,
     WANode,
@@ -159,4 +159,44 @@ export class WAConnection extends Base {
         }
         return response
     }
+    /**
+     * Add or remove user from blocklist
+     * @param jid the ID of the person who you are blocking/unblocking
+     * @param type type of operation
+     */
+    @Mutex (jid => jid)
+    async blockUser (jid: string, type: 'add' | 'remove' = 'add') {
+        jid.replace('@s.whatsapp.net', '@c.us')
+
+        const tag = this.generateMessageTag()
+        const json: WANode = [
+            'block',
+            {
+                type: type,
+            },
+            [
+                ['user', { jid }, null]
+            ],
+        ]
+        const result = await this.setQuery ([json], [WAMetric.block, WAFlag.ignore], tag)
+
+        if (result.status === 200) {
+            if (type === 'add') {
+                this.blocklist.push(jid)
+            } else {
+                const index = this.blocklist.indexOf(jid);
+                if (index !== -1) {
+                    this.blocklist.splice(index, 1);
+                }
+            }
+
+            // Blocklist update event
+            const update: BlocklistUpdate = { added: [], removed: [] }
+            let key = type === 'add' ? 'added' : 'removed'
+            update[key] = [ jid ]
+            this.emit('blocklist-update', update)
+        }
+
+        return result
+    }
 }

src/WAConnection/Constants.ts

@@ -428,6 +428,10 @@ export interface PresenceUpdate {
     type?: Presence
     deny?: boolean
 }
+export interface BlocklistUpdate {
+    added: string[]
+    removed: string[]
+}
 // path to upload the media
 export const MediaPathMap = {
     imageMessage: '/mms/image',
@@ -467,4 +471,5 @@ export type BaileysEvent =
     'group-update' |
     'received-pong' |
     'credentials-updated' |
-    'connection-validated'
+    'connection-validated' |
+    'blocklist-update'