Phase 1 complete

apps/backend/src/character/character.service.ts

@@ -0,0 +1,74 @@
+import { Injectable, NotFoundException, ForbiddenException } from '@nestjs/common';
+import { PrismaService } from '../prisma/prisma.service';
+import { CreateCharacterDto, UpdateCharacterDto } from './dto/create-character.dto';
+import { Character } from '@prisma/client';
+
+@Injectable()
+export class CharacterService {
+  constructor(private prisma: PrismaService) {}
+
+  async create(userId: string, createCharacterDto: CreateCharacterDto): Promise<Character> {
+    return this.prisma.character.create({
+      data: {
+        ...createCharacterDto,
+        userId,
+      },
+    });
+  }
+
+  async findAllByUser(userId: string): Promise<Character[]> {
+    return this.prisma.character.findMany({
+      where: { userId },
+      orderBy: { createdAt: 'desc' },
+    });
+  }
+
+  async findById(id: string, userId?: string): Promise<Character> {
+    const character = await this.prisma.character.findUnique({
+      where: { id },
+      include: {
+        knowledgeSources: true,
+      },
+    });
+
+    if (!character) {
+      throw new NotFoundException('Character not found');
+    }
+
+    // If userId is provided, check if user owns the character or if it's public
+    if (userId && character.userId !== userId && !character.isPublic) {
+      throw new ForbiddenException('You do not have access to this character');
+    }
+
+    return character;
+  }
+
+  async update(
+    id: string,
+    userId: string,
+    updateCharacterDto: UpdateCharacterDto,
+  ): Promise<Character> {
+    const character = await this.findById(id, userId);
+
+    if (character.userId !== userId) {
+      throw new ForbiddenException('You can only update your own characters');
+    }
+
+    return this.prisma.character.update({
+      where: { id },
+      data: updateCharacterDto,
+    });
+  }
+
+  async delete(id: string, userId: string): Promise<void> {
+    const character = await this.findById(id, userId);
+
+    if (character.userId !== userId) {
+      throw new ForbiddenException('You can only delete your own characters');
+    }
+
+    await this.prisma.character.delete({
+      where: { id },
+    });
+  }
+}