feat: Phase 1-3 全部完成 — 沙盒增强、学情分析、学习路径

backend/src/modules/contents/contents.controller.ts

@@ -0,0 +1,34 @@
+import { Controller, Get, Post, Put, Delete, Body, Param, Query } from '@nestjs/common';
+import { ApiTags } from '@nestjs/swagger';
+import { ContentsService } from './contents.service';
+
+@ApiTags('内容')
+@Controller('contents')
+export class ContentsController {
+  constructor(private contentsService: ContentsService) {}
+
+  @Get()
+  async findAll(@Query() query: { page?: number; pageSize?: number; categoryId?: number; contentType?: string }) {
+    return this.contentsService.findAll(query);
+  }
+
+  @Get(':id')
+  async findById(@Param('id') id: string) {
+    return this.contentsService.findById(+id);
+  }
+
+  @Post()
+  async create(@Body() body: any) {
+    return this.contentsService.create(body);
+  }
+
+  @Put(':id')
+  async update(@Param('id') id: string, @Body() body: any) {
+    return this.contentsService.update(+id, body);
+  }
+
+  @Delete(':id')
+  async remove(@Param('id') id: string) {
+    return this.contentsService.remove(+id);
+  }
+}

backend/src/modules/contents/contents.module.ts

@@ -0,0 +1,10 @@
+import { Module } from '@nestjs/common';
+import { ContentsController } from './contents.controller';
+import { ContentsService } from './contents.service';
+
+@Module({
+  controllers: [ContentsController],
+  providers: [ContentsService],
+  exports: [ContentsService],
+})
+export class ContentsModule {}

backend/src/modules/contents/contents.service.ts

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+import { Injectable } from '@nestjs/common';
+import { PrismaService } from '../../prisma/prisma.service';
+
+@Injectable()
+export class ContentsService {
+  constructor(private prisma: PrismaService) {}
+
+  async findAll(params: { page?: number; pageSize?: number; categoryId?: number; contentType?: string }) {
+    const page = Number(params.page ?? 1);
+    const pageSize = Number(params.pageSize ?? 20);
+    const { categoryId, contentType } = params;
+    const where: any = { status: 'PUBLISHED', deletedAt: null };
+    if (categoryId) where.categoryId = categoryId;
+    if (contentType) where.contentType = contentType;
+
+    const [items, total] = await Promise.all([
+      this.prisma.content.findMany({
+        where,
+        skip: (page - 1) * pageSize,
+        take: pageSize,
+        orderBy: { publishedAt: 'desc' },
+        select: {
+          id: true, title: true, summary: true, cover: true, contentType: true,
+          tags: true, authorName: true, viewCount: true, isAiGenerated: true,
+          publishedAt: true, createdAt: true, category: true,
+        },
+      }),
+      this.prisma.content.count({ where }),
+    ]);
+
+    return { items, total, page, pageSize };
+  }
+
+  async findById(id: number) {
+    const content = await this.prisma.content.findUnique({ where: { id }, include: { category: true } });
+    if (!content) return null;
+    await this.prisma.content.update({ where: { id }, data: { viewCount: { increment: 1 } } });
+    return content;
+  }
+
+  async create(data: any) {
+    return this.prisma.content.create({ data });
+  }
+
+  async update(id: number, data: any) {
+    return this.prisma.content.update({ where: { id }, data });
+  }
+
+  async remove(id: number) {
+    return this.prisma.content.update({ where: { id }, data: { deletedAt: new Date() } });
+  }
+}