Add shop-chat push notifications and a "send shop to users" endpoint

- shop-chat messages (buyer <-> shop owner) never sent any push notification
  at all — sendShopChatPushNotification (chatHelpers.js) now fires on every
  send, mirroring the existing regular-chat push path; data payload carries
  shop_id/buyer_id/sender_role so clients can route directly to the thread
- New POST /shops/:id/send, mirroring the existing shop-product send
  endpoint — lets a user share a shop itself (not just one product) into a
  regular chat message as a sharedShop payload

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

controllers/application/shop-chat/shopChatController.js

@@ -7,6 +7,7 @@ const ShopModel = require('../../../models/ShopModel')
 const ShopChatMessageModel = require('../../../models/ShopChatMessageModel')
 const UserModel = require('../../../models/UserModel')
 const { optimizeImageFile } = require('../../../utils/imageOptimize')
+const { sendShopChatPushNotification } = require('../../../helpers/chatHelpers')
 let optimizeVideoFaststart = async () => {}
 try {
   ({ optimizeVideoFaststart } = require('../../../utils/postVideoProcessing'))
@@ -200,16 +201,27 @@ const sendShopChatMessage = async (req, res, next) => {
     const { content } = req.body
     if (!content || !content.trim()) return chatError(res, 422, 'متن پیام الزامی است')
 
+    const senderRole = isOwner ? 'shop' : 'buyer'
     const message = await ShopChatMessageModel.create({
       shop: shop._id,
       buyer: buyerId,
-      senderRole: isOwner ? 'shop' : 'buyer',
+      senderRole,
       senderId: req.user._id,
       content: content.trim(),
       readByShop: isOwner,
       readByBuyer: !isOwner
     })
 
+    sendShopChatPushNotification({
+      shop,
+      senderId: req.user._id,
+      senderRole,
+      buyerId,
+      receiverId: isOwner ? buyerId : shop.owner
+    }).catch((err) => {
+      console.error('[shopChatController] push notification failed:', err.message)
+    })
+
     return res.status(201).json({ message })
   } catch (error) {
     next(error)
@@ -251,10 +263,11 @@ const sendShopChatFileMessage = async (req, res, next) => {
     }
     const fileUrl = `/shop-chat/${uniqueFileName}`
 
+    const senderRole = isOwner ? 'shop' : 'buyer'
     const message = await ShopChatMessageModel.create({
       shop: shop._id,
       buyer: buyerId,
-      senderRole: isOwner ? 'shop' : 'buyer',
+      senderRole,
       senderId: req.user._id,
       content: content && content.trim() ? content.trim() : null,
       file: fileUrl,
@@ -263,6 +276,16 @@ const sendShopChatFileMessage = async (req, res, next) => {
       readByBuyer: !isOwner
     })
 
+    sendShopChatPushNotification({
+      shop,
+      senderId: req.user._id,
+      senderRole,
+      buyerId,
+      receiverId: isOwner ? buyerId : shop.owner
+    }).catch((err) => {
+      console.error('[shopChatController] push notification failed:', err.message)
+    })
+
     return res.status(201).json({ message })
   } catch (error) {
     next(error)

controllers/application/shops/shopController.js

@@ -1,4 +1,5 @@
 /* eslint-disable camelcase */
+const mongoose = require('mongoose')
 const fs = require('fs-extra')
 const path = require('path')
 const jwt = require('jsonwebtoken')
@@ -7,8 +8,12 @@ const ShopProductListingModel = require('../../../models/ShopProductListingModel
 const ShopRatingModel = require('../../../models/ShopRatingModel')
 const ShopFollowModel = require('../../../models/ShopFollowModel')
 const OrderModel = require('../../../models/OrderModel')
+const MessageModel = require('../../../models/MessageModel')
+const UserModel = require('../../../models/UserModel')
 const { maskPhoneNumbers } = require('../../../utils/phoneNumberMasking')
 const { optimizeImageFile } = require('../../../utils/imageOptimize')
+const { viewerIsBlockedBy } = require('../../../utils/blockVisibility')
+const { enrichMessage, emitChatEvents } = require('../../../helpers/chatHelpers')
 
 const MS_DAY = 24 * 60 * 60 * 1000
 const ANALYTICS_RANGE_DAYS = { '7d': 7, '30d': 30, '90d': 90, all: null }
@@ -400,6 +405,76 @@ const submitShop = async (req, res, next) => {
   }
 }
 
+/** عینِ sendProductToUsers توی shopProductController.js — پیام‌های چتِ معمولی
+ * (MessageModel) با یه پیامِ sharedShop برای هرکدوم از گیرنده‌ها؛ برای ارسالِ خودِ
+ * فروشگاه (نه یه کالای خاص) از دکمه‌ی «ارسال» کنارِ اشتراک‌گذاری */
+const sendShopToUsers = async (req, res, next) => {
+  try {
+    const senderId = req.user._id
+    const { receiverIds } = req.body
+
+    if (!Array.isArray(receiverIds) || !receiverIds.length) {
+      return shopError(res, 400, 'حداقل یک گیرنده انتخاب کنید')
+    }
+
+    const uniqueReceivers = [
+      ...new Set(
+        receiverIds
+          .map(String)
+          .filter((id) => mongoose.Types.ObjectId.isValid(id) && id !== String(senderId))
+      )
+    ].slice(0, 50)
+
+    if (!uniqueReceivers.length) {
+      return shopError(res, 400, 'گیرنده معتبر یافت نشد')
+    }
+
+    const shop = await ShopModel.findById(req.params.id)
+    if (!shop) return shopError(res, 404, 'فروشگاه یافت نشد')
+
+    const sharedShop = {
+      shopId: String(shop._id),
+      name: shop.name,
+      logo: shop.logo || '',
+      url: `https://modstagram.com/shops/profile/${shop._id}`
+    }
+
+    const content = JSON.stringify({ sharedShop })
+    const io = req.app.get('io')
+
+    let sentCount = 0
+    for (const receiverId of uniqueReceivers) {
+      const receiver = await UserModel.findById(receiverId).select('blocked_users').lean()
+      if (!receiver) continue
+      if (viewerIsBlockedBy(receiver, senderId)) continue
+
+      const newMessage = new MessageModel({
+        senderId,
+        receiverId,
+        content
+      })
+      await newMessage.save()
+
+      if (io) {
+        const formatted = await enrichMessage(newMessage)
+        emitChatEvents(io, formatted, senderId, receiverId)
+      }
+      sentCount += 1
+    }
+
+    if (!sentCount) {
+      return shopError(res, 400, 'ارسال به هیچ گیرنده‌ای انجام نشد')
+    }
+
+    return res.status(200).json({
+      message: `فروشگاه به ${sentCount} نفر ارسال شد`,
+      sentCount
+    })
+  } catch (error) {
+    next(error)
+  }
+}
+
 module.exports = {
   createDraftShop,
   getMyShops,
@@ -412,5 +487,6 @@ module.exports = {
   updateShopLocation,
   updateShopContact,
   toggleShopFollow,
-  submitShop
+  submitShop,
+  sendShopToUsers
 }