commit 38f57228965c7e3f8f9ad955dce155b98332e047
Author: Isidoro Nevares Martín <inevares@hotmail.com>
Date:   Fri Mar 13 13:08:48 2026 +0100

    Commit inicial

diff --git a/.gitignore b/.gitignore
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--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,2 @@
+node_modules/
+.env
\ No newline at end of file
diff --git a/.vscode/launch.json b/.vscode/launch.json
new file mode 100644
index 0000000..ba388a7
--- /dev/null
+++ b/.vscode/launch.json
@@ -0,0 +1,11 @@
+{
+  "version": "0.2.0",
+  "configurations": [
+    {
+      "type": "node",
+      "request": "launch",
+      "name": "Iniciar app.js",
+      "program": "${workspaceFolder}/app.js"
+    }
+  ]
+}
\ No newline at end of file
diff --git a/README.md b/README.md
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index 0000000..23c67fa
--- /dev/null
+++ b/README.md
@@ -0,0 +1,129 @@
+# npm – Resumen rápido
+
+## ¿Qué es npm?
+
+**npm** (Node Package Manager) es la herramienta de gestión de paquetes y automatización de proyectos para Node.js.
+
+Permite instalar librerías, ejecutar scripts y gestionar dependencias de forma automática. Todo se configura mediante un archivo central llamado `package.json`.
+
+---
+
+## Conceptos básicos
+
+### `package.json`
+
+Es el archivo principal donde se define:
+
+- Información del proyecto (`name`, `version`, `description`)
+- Dependencias (`dependencies` y `devDependencies`)
+- Scripts de ejecución
+- Configuración de compilación o herramientas adicionales
+
+**Ejemplo básico:**
+
+```json
+{
+  "name": "mi-proyecto",
+  "version": "1.0.0",
+  "description": "Proyecto de ejemplo"
+}
+```
+
+---
+
+### Dependencias
+
+Las librerías necesarias para el proyecto se declaran en `package.json`:
+
+- `"dependencies"` → necesarias para **ejecución**
+- `"devDependencies"` → necesarias solo para **desarrollo**
+
+**Ejemplo:**
+
+```json
+"dependencies": {
+  "express": "^5.2.1",
+  "mysql2": "^3.19.1"
+}
+```
+
+Para instalarlas se ejecuta:
+
+```bash
+npm install
+```
+
+> npm descargará automáticamente las librerías en la carpeta `node_modules`.
+
+---
+
+### Scripts npm
+
+Los scripts permiten automatizar tareas comunes, como ejecutar la aplicación, tests o compilaciones.
+
+**Ejemplo en `package.json`:**
+
+```json
+"scripts": {
+  "start": "node app.js",
+  "dev": "node app.js",
+  "test": "echo \"Error: no test specified\" && exit 1"
+}
+```
+
+Se ejecutan con:
+
+```bash
+npm run start   # o simplemente: npm start
+npm run dev     # para desarrollo
+npm run test    # ejecutar tests
+```
+
+---
+
+## Ciclo de vida / tareas comunes
+
+| Comando | Función |
+|---|---|
+| `npm install` | Instala las dependencias |
+| `npm start` | Ejecuta la aplicación |
+| `npm run <script>` | Ejecuta un script definido en `package.json` |
+| `npm test` | Ejecuta los tests definidos |
+| `npm update` | Actualiza las dependencias |
+| `npm uninstall` | Elimina un paquete |
+
+---
+
+## Repositorios
+
+npm descarga paquetes desde repositorios:
+
+- **Local** → dentro de `node_modules` del proyecto
+- **Remoto** → el registro público de npm ([https://www.npmjs.com/](https://www.npmjs.com/))
+- **Privado** → repositorios internos o privados
+
+---
+
+## Estructura típica de un proyecto Node.js + Express
+
+```
+proyecto/
+│
+├── package.json
+├── package-lock.json
+├── node_modules/
+└── src/
+    ├── app.js
+    ├── controllers/
+    ├── services/
+    ├── dao/
+    └── models/
+```
+
+---
+
+## 💡 Idea clave
+
+> npm sigue el principio **"Convention over Configuration"** de manera ligera:
+> si respetas la estructura estándar de Node.js y defines tus scripts,
+> necesitas muy poca configuración para ejecutar tu proyecto.
\ No newline at end of file
diff --git a/app.js b/app.js
new file mode 100644
index 0000000..3c92483
--- /dev/null
+++ b/app.js
@@ -0,0 +1,12 @@
+// app.js
+const express = require('express');
+const app = express();
+const port = 3000;
+
+const continenteController = require('./controllers/ContinenteController');
+app.use('/api/continentes', continenteController);
+
+
+app.listen(port, () => {
+  console.log(`Servidor escuchando en http://localhost:${port}`);
+});
\ No newline at end of file
diff --git a/controllers/ContinenteController.js b/controllers/ContinenteController.js
new file mode 100644
index 0000000..fa804fa
--- /dev/null
+++ b/controllers/ContinenteController.js
@@ -0,0 +1,41 @@
+// controllers/ContinenteController.js
+const express = require('express');
+const router = express.Router();
+const continenteService = require('../services/ContinenteService');
+
+// GET /api/continentes - listar todos los continentes
+router.get('/', async (req, res) => {
+  try {
+    const lista = await continenteService.obtenerListaContinentes();
+    res.json(lista);
+  } catch (err) {
+    console.error(err);
+    res.status(500).send('Error en el servidor');
+  }
+});
+
+// GET /api/continentes/codigo/:codigo - obtener continente por código
+router.get('/codigo/:codigo', async (req, res) => {
+  try {
+    const continente = await continenteService.obtenerContinentePorCodigo(req.params.codigo);
+    if (!continente) return res.status(404).send('Continente no encontrado');
+    res.json(continente);
+  } catch (err) {
+    console.error(err);
+    res.status(500).send('Error en el servidor');
+  }
+});
+
+// GET /api/continentes/nombre/:nombre - obtener continente por nombre
+router.get('/nombre/:nombre', async (req, res) => {
+  try {
+    const resultados = await continenteService.obtenerContinentePorNombre(req.params.nombre);
+    if (resultados.length === 0) return res.status(404).send('Continente no encontrado');
+    res.json(resultados);
+  } catch (err) {
+    console.error(err);
+    res.status(500).send('Error en el servidor');
+  }
+});
+
+module.exports = router;
\ No newline at end of file
diff --git a/dao/IContinenteDAO.js b/dao/IContinenteDAO.js
new file mode 100644
index 0000000..28b9412
--- /dev/null
+++ b/dao/IContinenteDAO.js
@@ -0,0 +1,19 @@
+/**
+ * Interfaz DAO para la entidad Continente.
+ * Define los métodos que la implementación debe ofrecer.
+ */
+class IContinenteDAO {
+  listarTodos() {
+    throw new Error('Método listarTodos() no implementado');
+  }
+
+  buscarPorCodigo(codigo) {
+    throw new Error('Método buscarPorCodigo() no implementado');
+  }
+
+  buscarPorNombre(nombre) {
+    throw new Error('Método buscarPorNombre() no implementado');
+  }
+}
+
+module.exports = IContinenteDAO;
\ No newline at end of file
diff --git a/dao/impl/ContinenteDAOImpl.js b/dao/impl/ContinenteDAOImpl.js
new file mode 100644
index 0000000..b5c3485
--- /dev/null
+++ b/dao/impl/ContinenteDAOImpl.js
@@ -0,0 +1,34 @@
+const IContinenteDAO = require('../IContinenteDAO');
+const pool = require('../../gestores/gestorDB');
+const Continente = require('../../models/Continente');
+
+class ContinenteDAOImpl extends IContinenteDAO {
+  
+  // Listar todos los continentes
+  async listarTodos() {
+    const [rows] = await pool.query('SELECT codigo, nombre_continente AS nombre FROM T_CONTINENTE');
+    return rows.map(r => new Continente(r.codigo, r.nombre));
+  }
+
+  // Buscar por código
+  async buscarPorCodigo(codigo) {
+    const [rows] = await pool.query(
+      'SELECT codigo, nombre_continente AS nombre FROM T_CONTINENTE WHERE codigo = ?',
+      [codigo]
+    );
+    if (rows.length === 0) return null;
+    const r = rows[0];
+    return new Continente(r.codigo, r.nombre);
+  }
+
+  // Buscar por nombre
+  async buscarPorNombre(nombre) {
+    const [rows] = await pool.query(
+      'SELECT codigo, nombre_continente AS nombre FROM T_CONTINENTE WHERE nombre_continente LIKE ?',
+      [`%${nombre}%`]
+    );
+    return rows.map(r => new Continente(r.codigo, r.nombre));
+  }
+}
+
+module.exports = ContinenteDAOImpl;
\ No newline at end of file
diff --git a/gestores/gestorDB.js b/gestores/gestorDB.js
new file mode 100644
index 0000000..4f2273c
--- /dev/null
+++ b/gestores/gestorDB.js
@@ -0,0 +1,14 @@
+// gestores/gestorDB.js
+const mysql = require('mysql2/promise');
+
+const pool = mysql.createPool({
+  host: '192.168.1.36',          // Host de MySQL
+  user: 'root',       // Usuario MySQL
+  password: 'mysql_123',  // Contraseña
+  database: 'mapa_mundi',     // Nombre de la base de datos
+  waitForConnections: true,
+  connectionLimit: 10,
+  queueLimit: 0
+});
+
+module.exports = pool;
\ No newline at end of file
diff --git a/models/Continente.js b/models/Continente.js
new file mode 100644
index 0000000..1b37a39
--- /dev/null
+++ b/models/Continente.js
@@ -0,0 +1,13 @@
+// models/Continente.js
+class Continente {
+  constructor(codigo, nombre) {
+    this.codigo = codigo;
+    this.nombre = nombre;
+  }
+
+  toString() {
+    return `Continente [codigo=${this.codigo}, nombre=${this.nombre}]`;
+  }
+}
+
+module.exports = Continente;
\ No newline at end of file
diff --git a/package-lock.json b/package-lock.json
new file mode 100644
index 0000000..5ff9630
--- /dev/null
+++ b/package-lock.json
@@ -0,0 +1,1453 @@
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+    },
+    "unpipe": {
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+    },
+    "wrappy": {
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/wrappy/-/wrappy-1.0.2.tgz",
+      "integrity": "sha512-l4Sp/DRseor9wL6EvV2+TuQn63dMkPjZ/sp9XkghTEbV9KlPS1xUsZ3u7/IQO4wxtcFB4bgpQPRcR3QCvezPcQ=="
+    }
+  }
+}
diff --git a/package.json b/package.json
new file mode 100644
index 0000000..aa61ba0
--- /dev/null
+++ b/package.json
@@ -0,0 +1,18 @@
+{
+  "name": "aaee_ra3_proy4_node-express",
+  "version": "1.0.0",
+  "description": "",
+  "main": "index.js",
+  "scripts": {
+    "start": "node app.js",
+    "dev": "node app.js",
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "keywords": [],
+  "author": "",
+  "license": "ISC",
+  "dependencies": {
+    "express": "^5.2.1",
+    "mysql2": "^3.19.1"
+  }
+}
diff --git a/services/ContinenteService.js b/services/ContinenteService.js
new file mode 100644
index 0000000..be7cc9b
--- /dev/null
+++ b/services/ContinenteService.js
@@ -0,0 +1,24 @@
+const ContinenteDAOImpl = require('../dao/impl/ContinenteDAOImpl');
+
+class ContinenteService {
+  constructor() {
+    this.dao = new ContinenteDAOImpl(); // instancia del DAO
+  }
+
+  // Obtener todos los continentes
+  async obtenerListaContinentes() {
+    return await this.dao.listarTodos();
+  }
+
+  // Obtener continente por código
+  async obtenerContinentePorCodigo(codigo) {
+    return await this.dao.buscarPorCodigo(codigo);
+  }
+
+  // Obtener continente por nombre (puede devolver varios)
+  async obtenerContinentePorNombre(nombre) {
+    return await this.dao.buscarPorNombre(nombre);
+  }
+}
+
+module.exports = new ContinenteService();
\ No newline at end of file