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const express = require('express')

const fs = require('fs-extra')

const path = require('path')

const bodyParser = require('body-parser')

const cors = require('cors')

const rootDir = path.resolve(__dirname)

const infoDir = path.join(rootDir, 'info')

const app = express()

app.use(bodyParser.json())

app.use(cors())

app.post('/:name.json', async (request, response) => {

try {

const filename = path.join(infoDir, `${request.params.name}.json`)

await fs.ensureDir(infoDir)

await fs.writeFile(filename, JSON.stringify(request.body, null, 2))

response.statusCode = 200

response.json({ ok: true })

} catch (error) {

response.statusCode = 500

response.json({ error: "An error occurred" })

console.error(error)

}

response.end()

})

app.get('/_all.json', async (request, response) => {

try {

await fs.ensureDir(infoDir)

const files = await fs.readdir(infoDir)

const promises = files.map(file => fs.readFile(path.join(infoDir, file), 'utf8').then(raw => [file, raw]))

const raws = await Promise.all(promises)

const result = {}

for (const [file, raw] of raws) {

result[file.replace(/\.json$/, '')] = JSON.parse(raw)

}

response.json(result)

} catch (error) {

response.statusCode = 500

response.json({ error: "An error occurred" })

console.error(error)

}

response.end()

})

app.get('/:name.json', async (request, response) => {

try {

const filename = path.join(infoDir, `${request.params.name}.json`)

await fs.ensureDir(infoDir)

const raw = await fs.readFile(filename, 'utf8')

response.json(JSON.parse(raw))

} catch (error) {

if (error.code === 'ENOENT') {

response.statusCode = 404

response.json({ error: "File not found" })

} else {

response.statusCode = 500

response.json({ error: "An error occurred" })

console.error(error)

}

}

response.end()

})

app.delete('/_all.json', async (request, response) => {

try {

await fs.emptyDir(infoDir)

response.json({ ok: true })

} catch (error) {

response.statusCode = 500

response.json({ error: "An error occurred" })

console.error(error)

}

response.end()

})

app.delete('/:name.json', async (request, response) => {

try {

await fs.ensureDir(infoDir)

await fs.unlink(path.join(infoDir, `${request.params.name}.json`))

response.json({ ok: true })

} catch (error) {

if (error.code !== 'ENOENT') {

response.statusCode = 500

response.json({ error: "An error occurred" })

console.error(error)

} else {

response.json({ ok: true })

}

}

response.end()

})

app.use((request, response) => {

response.statusCode = 404

response.json({ error: "Not found" })

response.end()

})

app.listen(process.env.PORT || 80)