feat(backend): add follow relation and enforce followers visibility in feed

backend/src/posts/posts.controller.ts

@@ -0,0 +1,33 @@
+import { Controller, Get, Query, Req } from '@nestjs/common';
+import { PostsService } from './posts.service';
+
+@Controller('posts')
+export class PostsController {
+  constructor(private readonly postsService: PostsService) {}
+
+  @Get()
+  getFeed(
+    @Req() req,
+    @Query('take') take?: string,
+    @Query('cursorId') cursorId?: string,
+  ) {
+    return this.postsService.getFeed(req.user.id, {
+      mode: 'mixed',
+      take: take ? Number(take) : undefined,
+      cursorId: cursorId ? Number(cursorId) : undefined,
+    });
+  }
+
+  @Get('discovery')
+  getDiscovery(
+    @Req() req,
+    @Query('take') take?: string,
+    @Query('cursorId') cursorId?: string,
+  ) {
+    return this.postsService.getFeed(req.user.id, {
+      mode: 'discovery',
+      take: take ? Number(take) : undefined,
+      cursorId: cursorId ? Number(cursorId) : undefined,
+    });
+  }
+}