feat: page details section and backlinks (#2186)

* feat: page details section and backlinks

apps/server/src/core/page/page.controller.ts

@@ -11,6 +11,7 @@ import {
   UseGuards,
 } from '@nestjs/common';
 import { PageService } from './services/page.service';
+import { BacklinkService } from './services/backlink.service';
 import { PageAccessService } from './page-access/page-access.service';
 import { CreatePageDto } from './dto/create-page.dto';
 import { UpdatePageDto } from './dto/update-page.dto';
@@ -38,6 +39,7 @@ import { RecentPageDto } from './dto/recent-page.dto';
 import { CreatedByUserDto } from './dto/created-by-user.dto';
 import { DuplicatePageDto } from './dto/duplicate-page.dto';
 import { DeletedPageDto } from './dto/deleted-page.dto';
+import { BacklinksListDto } from './dto/backlink.dto';
 import {
   jsonToHtml,
   jsonToMarkdown,
@@ -58,6 +60,7 @@ export class PageController {
     private readonly pageHistoryService: PageHistoryService,
     private readonly spaceAbility: SpaceAbilityFactory,
     private readonly pageAccessService: PageAccessService,
+    private readonly backlinkService: BacklinkService,
     @Inject(AUDIT_SERVICE) private readonly auditService: IAuditService,
   ) {}
 
@@ -96,6 +99,42 @@ export class PageController {
     return { ...page, permissions };
   }
 
+  @HttpCode(HttpStatus.OK)
+  @Post('backlinks-count')
+  async getBacklinksCount(
+    @Body() dto: PageIdDto,
+    @AuthUser() user: User,
+  ): Promise<{ incoming: number; outgoing: number }> {
+    const page = await this.pageRepo.findById(dto.pageId);
+    if (!page) {
+      throw new NotFoundException('Page not found');
+    }
+    await this.pageAccessService.validateCanView(page, user);
+
+    return this.backlinkService.countByPageId(page.id, user.id);
+  }
+
+  @HttpCode(HttpStatus.OK)
+  @Post('backlinks')
+  async getBacklinks(
+    @Body() dto: BacklinksListDto,
+    @Body() pagination: PaginationOptions,
+    @AuthUser() user: User,
+  ) {
+    const page = await this.pageRepo.findById(dto.pageId);
+    if (!page) {
+      throw new NotFoundException('Page not found');
+    }
+    await this.pageAccessService.validateCanView(page, user);
+
+    return this.backlinkService.findByPageId(
+      page.id,
+      dto.direction,
+      user.id,
+      pagination,
+    );
+  }
+
   @HttpCode(HttpStatus.OK)
   @Post('create')
   async create(