feat: expose health and demo character APIs

apps/api/src/characters/characters.service.ts

@@ -0,0 +1,39 @@
+import { Injectable, NotFoundException } from '@nestjs/common';
+import { InjectRepository } from '@nestjs/typeorm';
+import { Repository } from 'typeorm';
+import { DEMO_CHARACTER_ID } from '../demo/demo-character.constants';
+import { Character } from './entities/character.entity';
+
+@Injectable()
+export class CharactersService {
+  constructor(
+    @InjectRepository(Character)
+    private readonly characters: Repository<Character>,
+  ) {}
+
+  async getDemoCharacter() {
+    const character = await this.characters.findOne({
+      where: { id: DEMO_CHARACTER_ID },
+      relations: { currentLocation: true },
+    });
+
+    if (!character) {
+      throw new NotFoundException('Demo character has not been seeded');
+    }
+
+    return {
+      id: character.id,
+      name: character.name,
+      level: character.level,
+      experience: character.experience,
+      currentHp: character.currentHp,
+      maxHp: character.baseHp,
+      attack: character.baseAttack,
+      currentLocation: {
+        id: character.currentLocation.id,
+        key: character.currentLocation.key,
+        name: character.currentLocation.name,
+      },
+    };
+  }
+}