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index.js
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/**
* Author: Ireshan M Pathirana
* Licence: GNU Public Licence
* Usage: Node.js
*/
const Util = require('./util');
const MySql = require('./database/mysql');
const MongoDb = require('./database/mongodb');
class Validation {
constructor() {
this.bail = false;
this.bailAll = false;
}
async check(request, checkObj, messages = {}) {
try {
let errorArry = [];
main_loop:
for (const property in checkObj) {
this.bail = false;
let check = checkObj[property].split('|');
for (let type of check) {
if (type.includes(':')) {
let [func, amount] = type.split(':');
let customMessage = this.messageProcessor(messages, property, func);
//check validation rule
this.validateValidationRules(func);
let validationState = await this[`${func}Validation`](amount, request, customMessage, property);
if (!validationState.status) {
errorArry.push(validationState.message);
// stop validation further if validation is failed.
if (this.bail) break;
if (this.bailAll) break main_loop;
}
}
if (!type.includes(':')) {
let customMessage = this.messageProcessor(messages, property, type);
//check validation rule
this.validateValidationRules(type);
let validationState = await this[`${type}Validation`](request, property, customMessage);
if (!validationState.status) {
errorArry.push(validationState.message);
// stop validation further if validation is failed.
if (this.bail) break;
if (this.bailAll) break main_loop;
}
}
}
}
return { validation: errorArry.length > 0 ? false : true, error: errorArry }
} catch (error) {
return { error: error.message };
}
}
async stringValidation(request, property, customMessage) {
if (!(typeof request[property] === 'string')) {
let defaultErrorMessage = "Error: Invalid string";
return Util.validationErrorInjector(defaultErrorMessage, customMessage);
};
return { status: true };
}
async alphaValidation(request, property, customMessage) {
const regExp = this.validateRegExp('[^A-Za-z0-9 ]+');
if (regExp.test(request[property])) {
let defaultErrorMessage = "Error: Special characters included";
return Util.validationErrorInjector(defaultErrorMessage, customMessage);
};
return { status: true };
}
async integerValidation(request, property, customMessage) {
const regExp = this.validateRegExp('[^0-9]');
if (regExp.test(`${request[property]}`)) {
let defaultErrorMessage = "Error: Invalid integer";
return Util.validationErrorInjector(defaultErrorMessage, customMessage);
};
return { status: true };
}
async minValidation(amount, request, customMessage, property) {
let size = 0;
//get user input value from the request
let value = request[property];
amount = parseInt(amount);
if (typeof value == 'object') {
size = Object.keys(value).length;
} else if (typeof value === 'number') {
size = value;
} else if (typeof value === 'string') {
size = value.length;
}
if (amount > size) {
let defaultErrorMessage = `Error: ${property} minimum length should be ${amount}`;
return Util.validationErrorInjector(defaultErrorMessage, customMessage);
}
return { status: true };
}
async maxValidation(amount, request, customMessage, property) {
let size = 0;
//get user input value from the request
let value = request[property];
amount = parseInt(amount);
if (typeof value == 'object') {
size = Object.keys(value).length;
} else if (typeof value === 'number') {
size = value;
} else if (typeof value === 'string') {
size = value.length;
}
if (amount < size) {
let defaultErrorMessage = `Error: ${property} maximum length should be ${amount}`;
return Util.validationErrorInjector(defaultErrorMessage, customMessage);
}
return { status: true };
}
async inValidation(setOfTerms, request, customMessage, property) {
//get user input value from the request
let value = request[property];
if (value != undefined) {
let termsArray = setOfTerms.toLowerCase().split(',')
if (!termsArray.includes(value.toLowerCase())) {
let defaultErrorMessage = `Error: ${value} is not expect in ${property}`;
return Util.validationErrorInjector(defaultErrorMessage, customMessage);
}
}
return { status: true };
}
async notInValidation(setOfTerms, request, customMessage, property) {
//get user input value from the request
let value = request[property];
if (value != undefined) {
let termsArray = setOfTerms.toLowerCase().split(',')
if (termsArray.includes(value.toLowerCase())) {
let defaultErrorMessage = `Error: ${value} is not expect`;
return Util.validationErrorInjector(defaultErrorMessage, customMessage);
}
}
return { status: true };
}
async requiredValidation(request, property, customMessage) {
let defaultErrorMessage = `Error: ${property} is required`;
let value = request[property];
if (!Object.keys(request).includes(property) || value == null) {
return Util.validationErrorInjector(defaultErrorMessage, customMessage);
} else if (typeof value == 'string') {
if (!value.trim().length > 0) {
return Util.validationErrorInjector(defaultErrorMessage, customMessage);
}
} else if (typeof value == 'object') {
if (!Object.keys(value).length > 0) {
return Util.validationErrorInjector(defaultErrorMessage, customMessage);
}
}
return { status: true };
}
async jsonValidation(request, property, customMessage) {
try {
let jsontext = JSON.stringify(request[property]);
JSON.parse(jsontext);
return { status: true };
} catch (e) {
let defaultErrorMessage = "Error: Invalid json string";
return Util.validationErrorInjector(defaultErrorMessage, customMessage);
}
}
async emailValidation(request, property, customMessage) {
var emailRegex = /^[A-Z0-9_'%=+!`#~$*?^{}&|-]+([\.][A-Z0-9_'%=+!`#~$*?^{}&|-]+)*@[A-Z0-9-]+(\.[A-Z0-9-]+)+$/i;
if (!emailRegex.test(request[property])) {
let defaultErrorMessage = "Error: Invalid email";
return Util.validationErrorInjector(defaultErrorMessage, customMessage);
};
return { status: true };
}
async uuidValidation(request, property, customMessage) {
const uuidRegExp = /^[0-9A-F]{8}-[0-9A-F]{4}-[4][0-9A-F]{3}-[89AB][0-9A-F]{3}-[0-9A-F]{12}$/i;
if (!uuidRegExp.test(request[property])) {
let defaultErrorMessage = "Error: Invalid uuid";
return Util.validationErrorInjector(defaultErrorMessage, customMessage);
};
return { status: true };
}
async booleanValidation(request, property, customMessage) {
let validationValue = request[property];
if (!(validationValue === 1 || validationValue === 0 || validationValue === true || validationValue === false)) {
let defaultErrorMessage = `Error: ${property} has invalid boolean value`;
return Util.validationErrorInjector(defaultErrorMessage, customMessage);
};
return { status: true };
}
async regExpValidation(regExpression, request, customMessage, property) {
//get user input value from the request
let value = request[property];
const regExp = this.validateRegExp(regExpression);
if (!regExp.test(value)) {
let defaultErrorMessage = `Error: ${property} has invalid input`;
return Util.validationErrorInjector(defaultErrorMessage, customMessage);
};
return { status: true };
}
async alphaDashValidation(request, property, customMessage) {
const regExp = this.validateRegExp('[^A-Za-z0-9-_ ]+');
if (regExp.test(request[property])) {
let defaultErrorMessage = `Error: ${property} has special characters`;
return Util.validationErrorInjector(defaultErrorMessage, customMessage);
};
return { status: true };
}
async digitsBetweenValidation(amount, request, customMessage, property) {
//get user input value from the request
const value = request[property];
const [from, to] = amount.split(',').map(Number);
if (from > value || to < value) {
let defaultErrorMessage = `Error: ${property} Number is out of range`;
return Util.validationErrorInjector(defaultErrorMessage, customMessage);
}
return { status: true };
}
async betweenValidation(amount, request, customMessage, property) {
//get user input value from the request
const value = request[property];
let size = 0;
const [from, to] = amount.split(',').map(Number);
if (typeof value == 'object') {
size = Object.keys(value).length;
} else if (typeof value === 'number') {
size = value;
} else if (typeof value === 'string') {
size = value.length;
}
if (from > size || to < size) {
let defaultErrorMessage = `Error: ${property} data is out of range`;
return Util.validationErrorInjector(defaultErrorMessage, customMessage);
}
return { status: true };
}
async ltValidation(amount, request, customMessage, property) {
//get user input value from the request
const value = request[property];
let size = 0;
amount = parseInt(amount);
if (typeof value == 'object') {
size = Object.keys(value).length;
} else if (typeof value === 'number') {
size = value;
} else if (typeof value === 'string') {
size = value.length;
}
if (amount <= size) {
let defaultErrorMessage = `Error: ${property} value is not less than ${amount}`;
return Util.validationErrorInjector(defaultErrorMessage, customMessage);
}
return { status: true };
}
async lteValidation(amount, request, customMessage, property) {
//get user input value from the request
const value = request[property];
let size = 0;
amount = parseInt(amount);
if (typeof value == 'object') {
size = Object.keys(value).length;
} else if (typeof value === 'number') {
size = value;
} else if (typeof value === 'string') {
size = value.length;
}
if (amount < size) {
let defaultErrorMessage = `Error: ${property} value is not less than or equal to ${amount}`;
return Util.validationErrorInjector(defaultErrorMessage, customMessage);
}
return { status: true };
}
async gtValidation(amount, request, customMessage, property) {
//get user input value from the request
const value = request[property];
let size = 0;
amount = parseInt(amount);
if (typeof value == 'object') {
size = Object.keys(value).length;
} else if (typeof value === 'number') {
size = value;
} else if (typeof value === 'string') {
size = value.length;
}
if (amount >= size) {
let defaultErrorMessage = `Error: ${property} value is not grater than to ${amount}`;
return Util.validationErrorInjector(defaultErrorMessage, customMessage);
}
return { status: true };
}
async gteValidation(amount, request, customMessage, property) {
//get user input value from the request
let value = request[property];
let size = 0;
amount = parseInt(amount);
if (typeof value == 'object') {
size = Object.keys(value).length;
} else if (typeof value === 'number') {
size = value;
} else if (typeof value === 'string') {
size = value.length;
}
if (amount > size) {
let defaultErrorMessage = `Error: ${property} value is not grater than or equal to ${amount}`;
return Util.validationErrorInjector(defaultErrorMessage, customMessage);
}
return { status: true };
}
async sizeValidation(amount, request, customMessage, property) {
//get user input value from the request
let value = request[property];
let size = 0;
amount = parseInt(amount);
if (typeof value == 'object') {
size = Object.keys(value).length;
} else if (typeof value === 'number') {
size = value;
} else if (typeof value === 'string') {
size = value.length;
}
if (amount != size) {
let defaultErrorMessage = `Error: ${property} value is not equal to ${value}`;
return Util.validationErrorInjector(defaultErrorMessage, customMessage);
}
return { status: true };
}
async digitsValidation(amount, request, customMessage, property) {
//get user input value from the request
let value = request[property];
amount = parseInt(amount);
value = value.toString().length;
if (amount != value) {
let defaultErrorMessage = `Error: ${property} number does not have ${amount} digits`;
return Util.validationErrorInjector(defaultErrorMessage, customMessage);
}
return { status: true };
}
async dateEqualsValidation(date, request, customMessage, property) {
date = new Date(date);
//get user input value from the request
let value = new Date(request[property]);
if (date.getTime() != value.getTime()) {
let defaultErrorMessage = `Error: ${property} date not equal`;
return Util.validationErrorInjector(defaultErrorMessage, customMessage);
}
return { status: true };
}
async beforeValidation(date, request, customMessage, property) {
date = new Date(date);
//get user input value from the request
let value = new Date(request[property]);
if (date.getTime() <= value.getTime()) {
let defaultErrorMessage = `Error: ${property} date not before`;
return Util.validationErrorInjector(defaultErrorMessage, customMessage);
}
return { status: true };
}
async beforeOrEqualValidation(date, request, customMessage, property) {
date = new Date(date);
//get user input value from the request
let value = new Date(request[property]);
if (date.getTime() < value.getTime()) {
let defaultErrorMessage = `Error: ${property} date not before or equal`;
return Util.validationErrorInjector(defaultErrorMessage, customMessage);
}
return { status: true };
}
async distinctValidation(request, property, customMessage) {
const userInput = request[property];
if (new Set(userInput).size !== userInput.length) {
let defaultErrorMessage = `Error: ${property} array contains duplicate values`;
return Util.validationErrorInjector(defaultErrorMessage, customMessage);
};
return { status: true };
}
async includesValidation(setOfTerms, request, customMessage, property) {
//get user input value from the request
let value = request[property];
if (value != undefined) {
let isItemIncludes = false;
let termsArray = setOfTerms.toLowerCase().split(',')
for (const tearm of termsArray) {
if (value.toLowerCase().includes(tearm)) {
isItemIncludes = true;
}
}
if (!isItemIncludes) {
let defaultErrorMessage = `Error: ${value} is not expect`;
return Util.validationErrorInjector(defaultErrorMessage, customMessage);
}
}
return { status: true };
}
async latValidation(request, property, customMessage) {
const latitude = request[property];
if (!(isFinite(latitude) && Math.abs(latitude) <= 90)) {
let defaultErrorMessage = "Error: Invalid latitude value";
return Util.validationErrorInjector(defaultErrorMessage, customMessage);
};
return { status: true };
}
async lngValidation(request, property, customMessage) {
const longtitude = request[property];
if (!(isFinite(longtitude) && Math.abs(longtitude) <= 180)) {
let defaultErrorMessage = "Error: Invalid longtitude value";
return Util.validationErrorInjector(defaultErrorMessage, customMessage);
};
return { status: true };
}
async arrayValidation(request, property, customMessage) {
const userInput = request[property];
if (!Array.isArray(userInput)) {
let defaultErrorMessage = "Error: Invalid array";
return Util.validationErrorInjector(defaultErrorMessage, customMessage);
};
return { status: true };
}
async sameValidation(anotherField, request, customMessage, property) {
//get user input value from the request.
let value = request[property];
//get user input of specified property.
let anotherFieldValue = request[anotherField];
if (JSON.stringify(value) !== JSON.stringify(anotherFieldValue)) {
let defaultErrorMessage = `Error: ${property} property value does not match to ${anotherField} property value`;
return Util.validationErrorInjector(defaultErrorMessage, customMessage);
}
return { status: true };
}
async afterValidation(date, request, customMessage, property) {
let dataField = request[date];
if (dataField != undefined) {
date = dataField;
}
date = new Date(date);
//get user input value from the request
let value = new Date(request[property]);
if (date.getTime() >= value.getTime()) {
let defaultErrorMessage = `Error: ${property} date not after`;
return Util.validationErrorInjector(defaultErrorMessage, customMessage);
}
return { status: true };
}
async bailValidation(date, value, customMessage) {
this.bail = true;
return { status: true };
}
setBailAll(status) {
this.bailAll = status;
}
validateValidationRules(rule) {
const check = this.__proto__.hasOwnProperty(`${rule}Validation`);
const check2 = this.hasOwnProperty(`${rule}Validation`);
if (!(check || check2)) throw { message: `${rule} is an invalid validation rule` };
}
//Process custom error messages which user defined
messageProcessor(messages, property, type) {
let errorMessageField = Object.keys(messages).filter(messageKey => messageKey == `${property}_${type}` || messageKey == type);
return messages[errorMessageField];
}
//Returns regular expression object for given reg exp string
validateRegExp(regexp) {
return new RegExp(regexp);
}
// database validations
/**
* @param {Object} dbConnectionSettings mysql dbConnection settings
* {
* host: "host",
* user: "data base user",
* password: "*****",
* database: "data base name"
* }
*/
initMysqlConnection(dbConnectionSettings = null) {
try {
if (dbConnectionSettings == null)
throw { message: 'Mysql database connection settings not found' };
const mysqlstuff = new MySql(dbConnectionSettings);
//this.prototype = mysqlstuff;
Object.assign(this, mysqlstuff);
} catch (error) {
console.log(error.message);
}
}
/**
* @param {Object} dbConnectionSettings mongodb dbConnection settings
* {
* url: "*********"
* }
*/
initMongoDbConnection(dbConnectionSettings = null) {
try {
if (dbConnectionSettings == null)
throw { message: 'Mongodb database connection settings not found' };
const mongoDbStuff = new MongoDb(dbConnectionSettings);
Object.assign(this, mongoDbStuff);
} catch (error) {
console.log(error.message);
}
}
}
module.exports = Validation;