feat: complete day 15

day15/app.js

@@ -0,0 +1,100 @@
+require("dotenv").config();
+const express = require("express");
+const bodyParser = require("body-parser");
+const { User, Post, sequelize } = require("./models");
+
+const app = express();
+app.use(bodyParser.json());
+
+// Helper to get model by resource name
+const models = { users: User, posts: Post };
+
+// Sync DB
+sequelize.sync();
+
+// TreeQL-style dynamic GET
+app.get("/:resource/:id?/:subresource?", async (req, res) => {
+  const { resource, id, subresource } = req.params;
+  const Model = models[resource];
+  if (!Model) return res.status(404).json({ error: "Resource not found" });
+
+  try {
+    if (id) {
+      const instance = await Model.findByPk(
+        id,
+        subresource ? { include: subresource } : {}
+      );
+      if (!instance) return res.status(404).json({ error: "Not found" });
+      if (subresource && instance[subresource]) {
+        return res.json(instance[subresource]);
+      }
+      return res.json(instance);
+    } else {
+      const all = await Model.findAll();
+      return res.json(all);
+    }
+  } catch (e) {
+    return res.status(500).json({ error: e.message });
+  }
+});
+
+// TreeQL-style POST (create resource or subresource)
+app.post("/:resource/:id?/:subresource?", async (req, res) => {
+  const { resource, id, subresource } = req.params;
+  const Model = models[resource];
+  if (!Model) return res.status(404).json({ error: "Resource not found" });
+
+  try {
+    if (id && subresource) {
+      // e.g. POST /users/1/posts
+      const parent = await models[resource].findByPk(id);
+      if (!parent) return res.status(404).json({ error: "Parent not found" });
+      const childModel = models[subresource];
+      if (!childModel)
+        return res.status(404).json({ error: "Subresource not found" });
+      const child = await childModel.create({ ...req.body, UserId: id });
+      return res.status(201).json(child);
+    } else {
+      // e.g. POST /users
+      const instance = await Model.create(req.body);
+      return res.status(201).json(instance);
+    }
+  } catch (e) {
+    return res.status(500).json({ error: e.message });
+  }
+});
+
+// TreeQL-style PUT (update resource)
+app.put("/:resource/:id", async (req, res) => {
+  const { resource, id } = req.params;
+  const Model = models[resource];
+  if (!Model) return res.status(404).json({ error: "Resource not found" });
+
+  try {
+    const instance = await Model.findByPk(id);
+    if (!instance) return res.status(404).json({ error: "Not found" });
+    await instance.update(req.body);
+    return res.json(instance);
+  } catch (e) {
+    return res.status(500).json({ error: e.message });
+  }
+});
+
+// TreeQL-style DELETE (delete resource)
+app.delete("/:resource/:id", async (req, res) => {
+  const { resource, id } = req.params;
+  const Model = models[resource];
+  if (!Model) return res.status(404).json({ error: "Resource not found" });
+
+  try {
+    const instance = await Model.findByPk(id);
+    if (!instance) return res.status(404).json({ error: "Not found" });
+    await instance.destroy();
+    return res.json({ success: true });
+  } catch (e) {
+    return res.status(500).json({ error: e.message });
+  }
+});
+
+const PORT = process.env.PORT || 3000;
+app.listen(PORT, () => console.log(`TreeQL API running on port ${PORT}`));

day15/db.js

@@ -0,0 +1,9 @@
+require("dotenv").config();
+const { Sequelize } = require("sequelize");
+
+const sequelize = new Sequelize("day_15", "root", process.env.DB_PASSWORD, {
+  host: "localhost",
+  dialect: "mysql",
+});
+
+module.exports = sequelize;

day15/models.js

@@ -0,0 +1,15 @@
+const { DataTypes } = require("sequelize");
+const sequelize = require("./db");
+
+const User = sequelize.define("User", {
+  name: DataTypes.STRING,
+});
+
+const Post = sequelize.define("Post", {
+  title: DataTypes.STRING,
+});
+
+User.hasMany(Post, { as: "posts" });
+Post.belongsTo(User);
+
+module.exports = { User, Post, sequelize };

day15/package.json

@@ -0,0 +1,19 @@
+{
+  "name": "day15",
+  "version": "1.0.0",
+  "description": "- setup project\r - implement https://www.treeql.org/ manually",
+  "main": "index.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "keywords": [],
+  "author": "",
+  "license": "ISC",
+  "dependencies": {
+    "body-parser": "^2.2.0",
+    "dotenv": "^17.2.0",
+    "express": "^5.1.0",
+    "mysql2": "^3.14.2",
+    "sequelize": "^6.37.7"
+  }
+}