feat: scaffold quiz API vertical slice

- Add GameRequestSchema and derived types to packages/shared
- Add SupportedLanguageCode, SupportedPos, DifficultyLevel type exports
- Add getGameTerms() model to packages/db with pos/language/difficulty/limit filters
- Add prepareGameQuestions() service skeleton in apps/api
- Add createGame controller with Zod safeParse validation
- Wire POST /api/v1/game/start route
- Add scripts/gametest/test-game.ts for manual end-to-end testing

apps/api/src/app.ts

@@ -4,7 +4,7 @@ import { apiRouter } from "./routes/apiRouter.js";
 
 export function createApp() {
   const app: Express = express();
-
+  app.use(express.json());
   app.use("/api/v1", apiRouter);
 
   return app;

apps/api/src/controllers/gameController.ts

@@ -1,8 +1,17 @@
 import type { Request, Response } from "express";
-import { prepareQuestions } from "../services/gameService.js";
+import { GameRequestSchema } from "@glossa/shared";
+import { prepareGameQuestions } from "../services/gameService.js";
 
-export const getGame = async (req: Request, res: Response) => {
-  const query = gameRequestSchema.parse(req.query);
-  const questions = await prepareQuestions(query);
-  res.json({ success: true, data: questions });
+export const createGame = async (req: Request, res: Response) => {
+  const gameSettings = GameRequestSchema.safeParse(req.body);
+
+  // TODO: remove when global error handler is implemented
+  if (!gameSettings.success) {
+    res.status(400).json({ success: false });
+    return;
+  }
+
+  const gameQuestions = await prepareGameQuestions(gameSettings.data);
+
+  res.json({ success: true, data: gameQuestions });
 };

apps/api/src/routes/gameRouter.ts

@@ -4,4 +4,4 @@ import { createGame } from "../controllers/gameController.js";
 
 export const gameRouter: Router = express.Router();
 
-gameRouter.get("/", createGame);
+gameRouter.post("/start", createGame);

apps/api/src/services/gameService.ts

@@ -1,3 +1,16 @@
-export const prepareQuestions = async (params: object) => {
-  console.log(params);
+import type { GameRequestType } from "@glossa/shared";
+import { getGameTerms } from "@glossa/db";
+
+export const prepareGameQuestions = async (gameSettings: GameRequestType) => {
+  const { source_language, target_language, pos, difficulty, rounds } =
+    gameSettings;
+
+  const terms = await getGameTerms(
+    source_language,
+    target_language,
+    pos,
+    difficulty,
+    Number(rounds),
+  );
+  return terms;
 };

apps/api/tsconfig.json

@@ -2,7 +2,7 @@
   "extends": "../../tsconfig.base.json",
   "references": [
     { "path": "../../packages/shared" },
-    { "path": "../../packages/db" }
+    { "path": "../../packages/db" },
   ],
   "compilerOptions": {
     "module": "NodeNext",
@@ -10,7 +10,7 @@
     "outDir": "./dist",
     "resolveJsonModule": true,
     "rootDir": ".",
-    "types": ["vitest/globals"]
+    "types": ["vitest/globals"],
   },
-  "include": ["src", "vitest.config.ts"]
+  "include": ["src", "vitest.config.ts", "../../packages/db/src/models"],
 }

documentation/roadmap.md

@@ -159,7 +159,7 @@ this would be the flow to start a single player game:
 main menu => singleplayer, multiplayer, settings
 singleplayer => language selection
 "i speak english" => "i want to learn italian" (both languages are dropdowns to select the fitting language)
-language selection => category selection => pure grammar, media (as disussed, practicing on song lyrics or breaking bad subtitles)
+language selection => category selection => pure grammar, media (practicing on song lyrics or breaking bad subtitles)
 pure grammar => pos selection => nouns or verbs (in mvp)
 nouns has 3 subcategories => singular (1-on-1 translation dog => cane), plural (plural practices cane => cani for example), gender/articles (il cane or la cane for example)
 verbs has 2 subcategories => infinitv (1-on-1 translation to talk => parlare) or conjugations (user gets shown the infinitiv and a table with all personal pronouns and has to fill in the gaps with the according conjugations)

packages/db/src/index.ts

@@ -9,3 +9,5 @@ config({
 });
 
 export const db = drizzle(process.env["DATABASE_URL"]!);
+
+export { getGameTerms } from "./models/termModel.js";

packages/db/src/models/termModel.ts

@@ -0,0 +1,32 @@
+import { db } from "@glossa/db";
+import { eq, and } from "drizzle-orm";
+import { terms, translations } from "@glossa/db/schema";
+
+import type {
+  SupportedLanguageCode,
+  SupportedPos,
+  DifficultyLevel,
+} from "@glossa/shared";
+
+export const getGameTerms = async (
+  sourceLanguage: SupportedLanguageCode,
+  targetLanguage: SupportedLanguageCode,
+  pos: SupportedPos,
+  difficulty: DifficultyLevel,
+  count: number,
+) => {
+  const rows = await db
+    .select()
+    .from(terms)
+    .innerJoin(translations, eq(translations.term_id, terms.id))
+    .where(
+      and(
+        eq(terms.pos, pos),
+        eq(translations.language_code, targetLanguage),
+        eq(translations.difficulty, difficulty),
+      ),
+    )
+    .limit(count);
+
+  return rows;
+};

packages/shared/src/constants.ts

@@ -1,11 +1,15 @@
 export const SUPPORTED_LANGUAGE_CODES = ["en", "it"] as const;
+export type SupportedLanguageCode = (typeof SUPPORTED_LANGUAGE_CODES)[number];
 
 export const SUPPORTED_POS = ["noun", "verb"] as const;
+export type SupportedPos = (typeof SUPPORTED_POS)[number];
 
 export const GAME_ROUNDS = ["3", "10"] as const;
+export type GameRounds = (typeof GAME_ROUNDS)[number];
 
 export const CEFR_LEVELS = ["A1", "A2", "B1", "B2", "C1", "C2"] as const;
 
 export const SUPPORTED_DECK_TYPES = ["grammar", "media"] as const;
 
 export const DIFFICULTY_LEVELS = ["easy", "intermediate", "hard"] as const;
+export type DifficultyLevel = (typeof DIFFICULTY_LEVELS)[number];

packages/shared/src/schema.ts

@@ -4,88 +4,15 @@ import {
   SUPPORTED_LANGUAGE_CODES,
   SUPPORTED_POS,
   GAME_ROUNDS,
+  DIFFICULTY_LEVELS,
 } from "./constants.js";
 
-export const Term = z.object({
-  id: z.uuid(),
-  synset_id: z.string(),
-  pos: z.string(),
-  created_at: z.iso.datetime(),
-});
-
-export type Term = z.infer<typeof Term>;
-
-export const Translation = z.object({
-  id: z.uuid(),
-  term_id: z.string(),
-  language_code: z.string(),
-  text: z.string(),
-  created_at: z.iso.datetime(),
-});
-
-export type Translation = z.infer<typeof Translation>;
-
-export const TermGloss = z.object({
-  id: z.uuid(),
-  term_id: z.uuid(),
-  language_code: z.string(),
-  text: z.string(),
-  created_at: z.iso.datetime(),
-});
-
-export type TermGloss = z.infer<typeof TermGloss>;
-
-export const LanguagePair = z.object({
-  id: z.uuid(),
-  source_language: z.string(),
-  target_language: z.string(),
-  label: z.string(),
-  active: z.boolean(),
-  created_at: z.iso.datetime(),
-});
-
-export type LanguagePair = z.infer<typeof LanguagePair>;
-
-export const User = z.object({
-  id: z.uuid(),
-  openauth_sub: z.string(),
-  email: z.email(),
-  display_name: z.string(),
-  created_at: z.iso.datetime(),
-  last_login_at: z.iso.datetime(),
-});
-
-export type User = z.infer<typeof User>;
-
-export const Deck = z.object({
-  id: z.uuid(),
-  name: z.string(),
-  description: z.string(),
-  source_language: z.string(),
-  validated_languages: z.array(z.string()),
-  is_public: z.boolean(),
-  created_at: z.iso.datetime(),
-});
-
-export type Deck = z.infer<typeof Deck>;
-
-export const DeckTerm = z.object({
-  deck_id: z.uuid(),
-  term_id: z.uuid(),
-  added: z.iso.datetime(),
-});
-
-export type DeckTerm = z.infer<typeof DeckTerm>;
-
-export const GameRequestSchema = z
-  .object({
+export const GameRequestSchema = z.object({
   source_language: z.enum(SUPPORTED_LANGUAGE_CODES),
   target_language: z.enum(SUPPORTED_LANGUAGE_CODES),
   pos: z.enum(SUPPORTED_POS),
-    rounds: z.enum(GAME_ROUNDS).transform(Number),
-  })
-  .refine((game) => game.target_language !== game.source_language, {
-    error: "source and target language must be different",
-  });
+  difficulty: z.enum(DIFFICULTY_LEVELS),
+  rounds: z.enum(GAME_ROUNDS),
+});
 
-export type GameRequestSchema = z.infer<typeof GameRequestSchema>;
+export type GameRequestType = z.infer<typeof GameRequestSchema>;

scripts/gametest/test-game.ts

@@ -0,0 +1,18 @@
+async function main() {
+  const response = await fetch("http://localhost:3000/api/v1/game/start", {
+    method: "POST",
+    headers: { "Content-Type": "application/json" },
+    body: JSON.stringify({
+      source_language: "en",
+      target_language: "it",
+      pos: "noun",
+      difficulty: "easy",
+      rounds: "3",
+    }),
+  });
+
+  const data = await response.json();
+  console.log(data);
+}
+
+main();