base.js

'use strict'

/** Class for User Policy */
class BasePolicy {
    /**
     * Initializer with options
     * @param {opt}
     */
    constructor(opt) {
        this.errorThrower = opt.errorThrower
        this.args = opt.args
    }

    /**
     * In Class Approve Method
     * Calls the constructor method
     * @param  {validator} validator [description]
     */
    approve(validator) {
        if (!this.constructor._approve(validator, this.args)) {
            this.throwError()
        } else {
            return validator.next()
        }
    }

    /**
     * Judges whether a request or user object
     * @param {user}
     * @return {Boolean}
     */
    static _approve(validator, args) {
        // Throws unimplemented error
        throw new Error('Unimplemented')
    }

    static requestParamsBuild(requestValidator, args) {
        let paramsArr = []
        args.params.forEach((arg) => {
            paramsArr.push(requestValidator.request.params[arg])
        })

        return paramsArr
    }

    throwError() {
        this.errorThrower.throw()
    }

}

module.exports = BasePolicy