@vreden/meta/lib/Signal/lid-mapping.js

Baileys is a lightweight JavaScript library for interacting with the WhatsApp Web API using WebSocket.

"use strict"

Object.defineProperty(exports, "__esModule", { value: true })

const lru_cache_1 = require("lru-cache")
const WABinary_1 = require("../WABinary")

class LIDMappingStore {
	constructor(keys, onWhatsAppFunc, logger) {
		this.mappingCache = new lru_cache_1.LRUCache({
            ttl: 7 * 24 * 60 * 60 * 1000, // 7 days
            ttlAutopurge: true,
            updateAgeOnGet: true
        })
		this.keys = keys
		this.logger = logger
		this.onWhatsAppFunc = onWhatsAppFunc // needed to get LID from PN if not found
	}
	/**
     * Store LID-PN mapping - USER LEVEL
     */
    async storeLIDPNMappings(pairs) {
        // Validate inputs
        const pairMap = {}
        const logger = this.logger
        
        for (const { lid, pn } of pairs) {
            if (!((WABinary_1.isLidUser(lid) && WABinary_1.isJidUser(pn)) || (WABinary_1.isJidUser(lid) && WABinary_1.isLidUser(pn)))) {
                logger.warn(`Invalid LID-PN mapping: ${lid}, ${pn}`)
                continue
            }
            
            const [lidJid, pnJid] = WABinary_1.isLidUser(lid) ? [lid, pn] : [pn, lid]
            const lidDecoded = WABinary_1.jidDecode(lidJid)
            const pnDecoded = WABinary_1.jidDecode(pnJid)
            
            if (!lidDecoded || !pnDecoded) return
            
            const pnUser = pnDecoded.user
            const lidUser = lidDecoded.user
            
            // Check if mapping already exists (cache first, then database)
            let existingLidUser = this.mappingCache.get(`pn:${pnUser}`)
            
            if (!existingLidUser) {
                // Cache miss - check database
                const stored = await this.keys.get('lid-mapping', [pnUser])
                
                existingLidUser = stored[pnUser]
                
                if (existingLidUser) {
                    // Update cache with database value
                    this.mappingCache.set(`pn:${pnUser}`, existingLidUser)
                    this.mappingCache.set(`lid:${existingLidUser}`, pnUser)
                }
            }
            
            if (existingLidUser === lidUser) {
                logger.debug({ pnUser, lidUser }, 'LID mapping already exists, skipping')
                continue
            }
            
            pairMap[pnUser] = lidUser
        }
        
        logger.trace({ pairMap }, `Storing ${Object.keys(pairMap).length} pn mappings`)
        
        await this.keys.transaction(async () => {
            for (const [pnUser, lidUser] of Object.entries(pairMap)) {
                await this.keys.set({
                    'lid-mapping': {
                        [pnUser]: lidUser, // "554396160286" -> "102765716062358"
                        [`${lidUser}_reverse`]: pnUser // "102765716062358_reverse" -> "554396160286"
                    }
                })
                
                // Update cache with both directions
                this.mappingCache.set(`pn:${pnUser}`, lidUser)
                this.mappingCache.set(`lid:${lidUser}`, pnUser)
            }
        }, 'lid-mapping')
    }
    /**
     * Get LID for PN - Returns device-specific LID based on user mapping
     */
    async getLIDForPN(pn) {
        if (!WABinary_1.isJidUser(pn)) return null
        
        const logger = this.logger
        const decoded = WABinary_1.jidDecode(pn)
        
        if (!decoded) return null
        
        // Check cache first for PN → LID mapping
        const pnUser = decoded.user
        
        let lidUser = this.mappingCache.get(`pn:${pnUser}`)
        
        if (!lidUser) {
            // Cache miss - check database
            const stored = await this.keys.get('lid-mapping', [pnUser])
            
            lidUser = stored[pnUser]
            
            if (lidUser) {
                // Cache the database result
                this.mappingCache.set(`pn:${pnUser}`, lidUser)
            }
            
            else {
                // Not in database - try USync
                logger.trace(`No LID mapping found for PN user ${pnUser}; getting from USync`)
                
                const { exists, lid } = (await this.onWhatsAppFunc?.(pn))?.[0] // this function already adds LIDs to mapping
                
                if (exists && lid) {
                    lidUser = WABinary_1.jidDecode(lid)?.user
                    
                    if (lidUser) {
                        // Cache the USync result
                        this.mappingCache.set(`pn:${pnUser}`, lidUser)
                    }
                }
                
                else {
                    return null
                }
            }
        }
        
        if (typeof lidUser !== 'string' || !lidUser) {
            logger.warn(`Invalid or empty LID user for PN ${pn}: lidUser = "${lidUser}"`)
            return null
        }
        
        // Push the PN device ID to the LID to maintain device separation
        const pnDevice = decoded.device !== undefined ? decoded.device : 0
        const deviceSpecificLid = `${lidUser}:${pnDevice}@lid`
        
        logger.trace(`getLIDForPN: ${pn} → ${deviceSpecificLid} (user mapping with device ${pnDevice})`)
        
        return deviceSpecificLid
    }
    /**
     * Get PN for LID - USER LEVEL with device construction
     */
     async getPNForLID(lid) {
        if (!WABinary_1.isLidUser(lid)) return null
        
        const logger = this.logger
        const decoded = WABinary_1.jidDecode(lid)
        
        if (!decoded) return null
        
        // Check cache first for LID → PN mapping
        const lidUser = decoded.user
        
        let pnUser = this.mappingCache.get(`lid:${lidUser}`)
        
        if (!pnUser || typeof pnUser !== 'string') {
            // Cache miss - check database
            const stored = await this.keys.get('lid-mapping', [`${lidUser}_reverse`]);
            pnUser = stored[`${lidUser}_reverse`]
            
            if (!pnUser || typeof pnUser !== 'string') {
                logger.trace(`No reverse mapping found for LID user: ${lidUser}`)
                return null
            }
            
            this.mappingCache.set(`lid:${lidUser}`, pnUser)
        }
        
        // Construct device-specific PN JID
        const lidDevice = decoded.device !== undefined ? decoded.device : 0
        const pnJid = `${pnUser}:${lidDevice}@s.whatsapp.net`
        logger.trace(`Found reverse mapping: ${lid} → ${pnJid}`)
        
        return pnJid
    }
}

module.exports = {
  LIDMappingStore
}