feat: implement audit logging system with service, controller, and interceptor to track user actions across core services

src/cms/cms.service.ts

@@ -1,10 +1,15 @@
 import { Injectable, NotFoundException } from '@nestjs/common';
 import { PrismaService } from '../prisma/prisma.service';
 import { CreateCmsContentDto, UpdateCmsContentDto } from './dto';
+import { AuditService } from '../audit/audit.service';
+import { AuditAction } from '../audit/audit.constants';
 
 @Injectable()
 export class CmsService {
-  constructor(private prisma: PrismaService) {}
+  constructor(
+    private prisma: PrismaService,
+    private audit: AuditService,
+  ) {}
 
   async findByPage(pageSlug: string) {
     return this.prisma.cmsContent.findMany({
@@ -49,10 +54,26 @@ export class CmsService {
     if (!existing) {
       throw new NotFoundException(`CMS content with ID ${id} not found`);
     }
-    return this.prisma.cmsContent.update({
+    const updated = await this.prisma.cmsContent.update({
       where: { id },
       data: dto,
     });
+
+    if (
+      typeof dto.isPublished === 'boolean' &&
+      existing.isPublished !== dto.isPublished
+    ) {
+      this.audit.log({
+        action: dto.isPublished
+          ? AuditAction.CMS_BLOG_PUBLISH
+          : AuditAction.CMS_BLOG_UNPUBLISH,
+        resourceType: 'CmsContent',
+        resourceId: id,
+        metadata: { pageSlug: existing.pageSlug, sectionKey: existing.sectionKey },
+      });
+    }
+
+    return updated;
   }
 
   async remove(id: string) {
@@ -60,6 +81,13 @@ export class CmsService {
     if (!existing) {
       throw new NotFoundException(`CMS content with ID ${id} not found`);
     }
-    return this.prisma.cmsContent.delete({ where: { id } });
+    const deleted = await this.prisma.cmsContent.delete({ where: { id } });
+    this.audit.log({
+      action: AuditAction.CMS_BLOG_DELETE,
+      resourceType: 'CmsContent',
+      resourceId: id,
+      metadata: { pageSlug: existing.pageSlug, sectionKey: existing.sectionKey },
+    });
+    return deleted;
   }
 }