feat: Automatically mark messages as delivered when recipients come online or receive new messages.

src/messages/messages.service.ts

@@ -528,6 +528,52 @@ export class MessagesService {
     });
   }
 
+  /**
+   * Mark all SENT messages addressed to a user as DELIVERED (when they come online)
+   * Returns the updated messages grouped by conversation for notification purposes
+   */
+  async markPendingMessagesAsDelivered(userId: string): Promise<{ conversationId: string; senderId: string; messageIds: string[]; deliveredAt: Date }[]> {
+    const now = new Date();
+
+    // Find all conversations where this user is a participant
+    const conversations = await this.prisma.conversation.findMany({
+      where: {
+        OR: [
+          { userId },
+          { agentProfile: { userId } },
+        ],
+      },
+      select: { id: true, userId: true, agentProfile: { select: { userId: true } } },
+    });
+
+    const results: { conversationId: string; senderId: string; messageIds: string[]; deliveredAt: Date }[] = [];
+
+    for (const conv of conversations) {
+      const otherUserId = conv.userId === userId ? conv.agentProfile.userId : conv.userId;
+
+      // Find SENT messages from the other user in this conversation
+      const sentMessages = await this.prisma.message.findMany({
+        where: {
+          conversationId: conv.id,
+          senderId: otherUserId,
+          status: MessageStatus.SENT,
+        },
+        select: { id: true },
+      });
+
+      if (sentMessages.length > 0) {
+        const messageIds = sentMessages.map((m) => m.id);
+        await this.prisma.message.updateMany({
+          where: { id: { in: messageIds } },
+          data: { status: MessageStatus.DELIVERED, deliveredAt: now },
+        });
+        results.push({ conversationId: conv.id, senderId: otherUserId, messageIds, deliveredAt: now });
+      }
+    }
+
+    return results;
+  }
+
   /**
    * Get conversation by ID with full details
    */