node-rigorous/src/factory/ObjectScrapper.js

Rigorous Framework

const RigorousError = require('../facades/RigorousError');
const errorsMessages = require('../etc/errorsMessages');

const format_checker = require('../helpers/format_checker');

module.exports = class ObjectScrapper {

    constructor(scrapObject, imageNotFoundValue) {

        if (!scrapObject) { 
            throw new RigorousError(errorsMessages.NullScrappedObjectError); 
        }

        this.imageNotFoundValue = imageNotFoundValue;
        this.scrapObject = scrapObject;
    }

    setDefaultFieldValueIfNotFound(fieldName, fieldValue) {

        const fieldVar = this.scrapObject[fieldName];
        
        if (format_checker.isNil(fieldVar.v)) {

            this.scrapObject[fieldName] = { v: fieldValue, s: 'not-found' };
        }
    }

    getValue(fieldName) {

        return this.scrapObject[fieldName].v;
    }

    getScrapperVersion() {

        return this.scrapObject.scrapper_version;
    }

    hasImage() {

        return this.getValue('image') !== this.imageNotFoundValue;
    }

};