zetabasejs/orm/Model.js

A NoSQL database for quick deployment.

var DBCONN = null

class Model {
    static setDBCONN(db) {
        DBCONN = db
    }

    constructor() {
        if (!DBCONN) throw "Error: ORM module is not enabled on ZetabaseJS"
        this.__ctime__ = null
        this.__mtime__ = null
        this.__key__ = null
    }

    put() {
        this.__key__ = this.__key__ ? this.__key__ : DBCONN._key()
        if (!this.__ctime__) this.__ctime__ = this.__mtime__ = new Date().getTime() * 1000
        else this.__mtime__ = new Date().getTime() * 1000
        DBCONN.write(`/${this.constructor.name}/${this.__key__}`, this)
        return this
    }

    static get(key) {
        if (!DBCONN) throw "Error: Please initialize an ZetabaseJS instance with option { orm: true }."
        return Object.assign(new this(), DBCONN.read(`/${this.name}/${key}`))
    }

    static query(options) {
        if (!DBCONN) throw "Error: Please initialize an ZetabaseJS instance with option { orm: true }."
        if (!DBCONN.containsKey(new this().constructor.name)) return null;
        options = this._defaultOptions(options || {})
        let results = DBCONN.query(`/${this.name}/:key/@${options.fields}`, options.filters)
        return results && options.get ? results.map(res => this.get(res.__key__)) : results
    }

    static _defaultOptions(options) {
        if (!options.fields) options.fields = "{}"
        if (isNaN(options.get)) options.get = true
        if (options.get && options.fields.indexOf('__key__') < 0) options.fields = options.fields.replace('}', ', __key__ }')
        if (!options.filters) options.filters = val => true
        return options
    }
}

module.exports = Model;