practice/src/app.js - main - malklopp/opencode-course

practice/src/app.js

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malklop

Курс изучения OpenCode: модули 0-5, учебный Express-проект, README

10 авг 2026, 22:38

10 авг 2026, 22:38aa4d518

const express = require('express')
const { listNotes, getNote, createNote, updateNote, deleteNote } = require('./db')

const app = express()

app.use(express.json({ limit: '100kb' }))
app.use(express.urlencoded({ extended: true }))

app.get('/health', (req, res) => {
  res.json({ status: 'ok' })
})

app.get('/notes', (req, res) => {
  res.json(listNotes())
})

app.get('/notes/:id', (req, res) => {
  const note = getNote(req.params.id)
  if (!note) return res.status(404).json({ error: 'Note not found' })
  res.json(note)
})

app.post('/notes', (req, res) => {
  const { title, body } = req.body || {}
  if (!title || typeof title !== 'string' || !title.trim()) {
    return res.status(400).json({ error: 'title is required' })
  }
  if (body !== undefined && typeof body !== 'string') {
    return res.status(400).json({ error: 'body must be a string' })
  }
  const note = createNote({ title: title.trim(), body: body ?? '' })
  res.status(201).json(note)
})

app.put('/notes/:id', (req, res) => {
  const { title, body } = req.body || {}
  if (title !== undefined && (typeof title !== 'string' || !title.trim())) {
    return res.status(400).json({ error: 'title must be a non-empty string' })
  }
  if (body !== undefined && typeof body !== 'string') {
    return res.status(400).json({ error: 'body must be a string' })
  }
  const note = updateNote(req.params.id, {
    title: title === undefined ? undefined : title.trim(),
    body,
  })
  if (!note) return res.status(404).json({ error: 'Note not found' })
  res.json(note)
})

app.delete('/notes/:id', (req, res) => {
  const deleted = deleteNote(req.params.id)
  if (!deleted) return res.status(404).json({ error: 'Note not found' })
  res.status(204).end()
})

app.use((req, res) => {
  res.status(404).json({ error: 'Route not found' })
})

app.use((err, req, res, next) => {
  if (err.type === 'entity.parse.failed' || err.type === 'entity.too.large') {
    return res.status(400).json({ error: 'Invalid request body' })
  }
  console.error(err)
  res.status(500).json({ error: 'Internal server error' })
})

module.exports = app