cloudDBAdapter.js

/**
   * MIT License
* 
   * Copyright (c) 2021 Alien-Alfa.
* 
   * Permission is hereby granted, free of charge, to any person obtaining a copy
   * of this software and associated documentation files (the "Software"), to deal
   * in the Software without restriction, including without limitation the rights
   * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
   * copies of the Software, and to permit persons to whom the Software is
   * furnished to do so, subject to the following conditions:
* 
   * The above copyright notice and this permission notice shall be included in all
   * copies or substantial portions of the Software.
* 
   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
   * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
   * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
   * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
   * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
   * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
   * SOFTWARE.
*/
const got = require('got')

const stringify = obj => JSON.stringify(obj, null, 2)
const parse = str => JSON.parse(str, (_, v) => {
    if (
        v !== null &&
        typeof v === 'object' &&
        'type' in v &&
        v.type === 'Buffer' &&
        'data' in v &&
        Array.isArray(v.data)) {
        return Buffer.from(v.data)
    }
    return v
})
class CloudDBAdapter {
    constructor(url, {
        serialize = stringify,
        deserialize = parse,
        fetchOptions = {}
    } = {}) {
        this.url = url
        this.serialize = serialize
        this.deserialize = deserialize
        this.fetchOptions = fetchOptions
    }

    async read() {
        try {
            let res = await got(this.url, {
                method: 'GET',
                headers: {
                    'Accept': 'application/json;q=0.9,text/plain'
                },
                ...this.fetchOptions
            })
            if (res.statusCode !== 200) throw res.statusMessage
            return this.deserialize(res.body)
        } catch (e) {
            return null
        }
    }

    async write(obj) {
        let res = await got(this.url, {
            method: 'POST',
            headers: {
                'Content-Type': 'application/json'
            },
            ...this.fetchOptions,
            body: this.serialize(obj)
        })
        if (res.statusCode !== 200) throw res.statusMessage
        return res.body
    }
}

module.exports = CloudDBAdapter