handling closing posts

backend/services/email/domain/ForumEmailService.js

@@ -313,6 +313,77 @@ class ForumEmailService {
       return { success: false, error: error.message };
     }
   }
+
+  /**
+   * Send notification when a discussion is closed
+   * @param {Object} recipient - Recipient user object
+   * @param {string} recipient.firstName - Recipient's first name
+   * @param {string} recipient.email - Recipient's email
+   * @param {Object} closer - User who closed the discussion (can be admin or post author)
+   * @param {string} closer.firstName - Closer's first name
+   * @param {string} closer.lastName - Closer's last name
+   * @param {Object} post - Forum post object
+   * @param {number} post.id - Post ID
+   * @param {string} post.title - Post title
+   * @param {Date} closedAt - Timestamp when discussion was closed
+   * @returns {Promise<{success: boolean, messageId?: string, error?: string}>}
+   */
+  async sendForumPostClosedNotification(
+    recipient,
+    closer,
+    post,
+    closedAt
+  ) {
+    if (!this.initialized) {
+      await this.initialize();
+    }
+
+    try {
+      const frontendUrl = process.env.FRONTEND_URL || "http://localhost:3000";
+      const postUrl = `${frontendUrl}/forum/posts/${post.id}`;
+
+      const timestamp = new Date(closedAt).toLocaleString("en-US", {
+        dateStyle: "medium",
+        timeStyle: "short",
+      });
+
+      const variables = {
+        recipientName: recipient.firstName || "there",
+        adminName:
+          `${closer.firstName} ${closer.lastName}`.trim() || "A user",
+        postTitle: post.title,
+        postUrl: postUrl,
+        timestamp: timestamp,
+      };
+
+      const htmlContent = await this.templateManager.renderTemplate(
+        "forumPostClosed",
+        variables
+      );
+
+      const subject = `Discussion closed: ${post.title}`;
+
+      const result = await this.emailClient.sendEmail(
+        recipient.email,
+        subject,
+        htmlContent
+      );
+
+      if (result.success) {
+        console.log(
+          `Forum post closed notification email sent to ${recipient.email}`
+        );
+      }
+
+      return result;
+    } catch (error) {
+      console.error(
+        "Failed to send forum post closed notification email:",
+        error
+      );
+      return { success: false, error: error.message };
+    }
+  }
 }
 
 module.exports = ForumEmailService;