FEAT: Implementa download e armazenamento de mídia recebida via webhook

- Detecta mensagens de mídia (image, audio, video, document, sticker)
- downloadMetaMedia() busca URL temporária na Meta e baixa o binário
- Salva via MediaStorageService antes de persistir e emitir
- Socket.IO passa mediaUrl e mediaMimeType ao invés de media: null
- Falha no download loga erro mas não bloqueia o salvamento da mensagem

src/modules/whatsapp/whatsapp.service.ts

@@ -5,6 +5,9 @@ import { ContactsService } from '../contacts/contacts.service';
 import { WhatsappTemplateService } from './whatsapp-template.service';
 import { MensagensRepository } from './repositories/mensagens.repository';
 import { WhatsappConfigService } from './whatsapp-config.service';
+import { MediaStorageService } from './media/media-storage.service';
+
+const MEDIA_TYPES = ['image', 'audio', 'video', 'document', 'sticker'] as const;
 
 @Injectable()
 export class WhatsappService {
@@ -19,6 +22,7 @@ export class WhatsappService {
     private readonly whatsappTemplateService: WhatsappTemplateService,
     private readonly mensagensRepository: MensagensRepository,
     private readonly configService: WhatsappConfigService,
+    private readonly mediaStorageService: MediaStorageService,
   ) {}
 
   private async enqueueIncomingRoute(remoteJid: string, msg: any, messageBody: string, messageId: string) {
@@ -310,6 +314,7 @@ export class WhatsappService {
     const from: string = message.from;
     const messageId: string = message.id;
     const timestamp: number = parseInt(message.timestamp, 10);
+    const messageType: string = message.type ?? 'text';
     const messageBody: string = message.text?.body?.trim() ?? '';
 
     const contact = contacts.find((c) => c.wa_id === from);
@@ -322,16 +327,35 @@ export class WhatsappService {
       this.processedIncomingMessages.delete(oldest);
     }
 
-    this.logger.log(`[Meta] Mensagem recebida de ${from} (${contactName}): ${messageBody || '[mídia]'}`);
+    this.logger.log(`[Meta] Mensagem recebida de ${from} (${contactName}): ${messageBody || `[${messageType}]`}`);
+
+    let mediaPath: string | undefined;
+    let mediaMimeType: string | undefined;
+
+    if ((MEDIA_TYPES as readonly string[]).includes(messageType)) {
+      const mediaObj = message[messageType];
+      if (mediaObj?.id) {
+        try {
+          const { buffer, mimeType } = await this.downloadMetaMedia(mediaObj.id, mediaObj.mime_type);
+          mediaPath = await this.mediaStorageService.upload(buffer, mimeType);
+          mediaMimeType = mimeType;
+          this.logger.log(`[Meta] Mídia salva: ${mediaPath}`);
+        } catch (err) {
+          this.logger.error(`[Meta] Falha ao baixar mídia ${mediaObj.id} de ${from}:`, err);
+        }
+      }
+    }
 
     await this.mensagensRepository.save({
       wamid: messageId,
       chatId: from,
       fromMe: false,
-      type: message.type ?? 'text',
+      type: messageType,
       body: messageBody || undefined,
       senderName: contactName,
       timestamp,
+      mediaPath,
+      mediaMimeType,
     });
 
     this.gateway.emitNewMessage({
@@ -342,16 +366,17 @@ export class WhatsappService {
       id: messageId,
       fromMe: false,
       notifyName: contactName,
-      hasMedia: message.type !== 'text',
-      media: null,
+      hasMedia: !!mediaPath,
+      mediaUrl: mediaPath ? this.mediaStorageService.getUrl(mediaPath) : null,
+      mediaMimeType: mediaMimeType ?? null,
     });
 
-    if (messageBody) {
+    if (messageBody || mediaPath) {
       await this.assignmentService.markCustomerReplied(from);
     }
 
     if (!messageBody) {
-      this.logger.log(`[Meta] Triagem ignorada para ${from}: mensagem sem texto.`);
+      this.logger.log(`[Meta] Triagem ignorada para ${from}: mensagem de mídia sem texto.`);
       return;
     }
 
@@ -365,4 +390,34 @@ export class WhatsappService {
     await this.enqueueIncomingRoute(from, fakeMsg, messageBody, messageId);
   }
 
+  private async downloadMetaMedia(mediaId: string, webhookMimeType?: string): Promise<{ buffer: Buffer; mimeType: string }> {
+    const { access_token: token, api_version: apiVersion } = await this.configService.getConfig();
+
+    if (!token) throw new Error('Token do WhatsApp não configurado.');
+
+    const metaResponse = await fetch(
+      `https://graph.facebook.com/${apiVersion}/${mediaId}`,
+      { headers: { Authorization: `Bearer ${token}` } },
+    );
+
+    if (!metaResponse.ok) {
+      throw new Error(`Meta API erro ao buscar URL de mídia ${mediaId}: ${metaResponse.status}`);
+    }
+
+    const metaData = await metaResponse.json() as any;
+    const downloadUrl: string = metaData.url;
+    const mimeType: string = webhookMimeType || metaData.mime_type || 'application/octet-stream';
+
+    const fileResponse = await fetch(downloadUrl, {
+      headers: { Authorization: `Bearer ${token}` },
+    });
+
+    if (!fileResponse.ok) {
+      throw new Error(`Falha ao baixar arquivo de mídia: ${fileResponse.status}`);
+    }
+
+    const arrayBuffer = await fileResponse.arrayBuffer();
+    return { buffer: Buffer.from(arrayBuffer), mimeType };
+  }
+
 }