relational-json/src/scripts/buildModel/Model/validateDataType.js

Relation data model for JSON objects

"use strict";

/**
 * @private
 * Attempts to validate data formats based on MySQL requirements & best-practices.
 * @param {object} field - field-portion of the model
 * @param {*} value - value to test against field's dataType
 * @returns {boolean}
 */
module.exports = function validateDataType(field, value) {
    // expected types: string, integer, float, date, time, datetime, boolean
    var type = typeof value,
        res = false;

    // exception for nullable fields
    if (field.allowNull === true && value === null) {
        return true;
    }

    switch (field.dataType) {
        case "string": {
            res = type === "string";
            break;
        }

        case "integer": {
            res = type === "number" && /^[-+]?\d{1,20}$/.test(value.toString());
            break;
        }

        case "float": {
            res = type === "number" && /^[-+]?\d{1,20}(?:\.\d{1,20})?$/.test(value.toString());
            break;
        }

        case "boolean": {
            res = (type === "boolean" && (value === true || value === false)) || (type === "number" && (value === 1 || value === 0));
            break;
        }

        case "date":
        case "datetime": {
            res = !isNaN(Date.parse(value));

            break;
        }

        case "time": {
            res = type === "string" && /^(0[0-9]|1[0-9]|2[0-3])(:[0-5][0-9]){2}(\.[0-9]{1,6})?$/.test(value);
            break;
        }

        default: {
            throw new Error("Incompatible dataType: " + type);
        }
    }

    return res;
};