node-easyvalid/src/index.js

A lightweight, powerful validation library for Node.js backend development. Simplify user input validation, error handling, and data integrity in Express APIs and JavaScript applications with ease.

// src/index.js

// Single value validation
const isTrue = (value, message = "Validation Failed", statusCode = 400) => {
    if (!value) {
        const error = new Error(message);
        error.statusCode = statusCode;
        throw error;
    }
    return true;
};

// Array values validation
const isTrues = (array, message = "Validation Failed", statusCode = 400) => {
    if (!Array.isArray(array)) {
        const error = new Error("Input must be an array");
        error.statusCode = statusCode;
        throw error;
    }
    if (array.length === 0) {
        const error = new Error("Array cannot be empty");
        error.statusCode = statusCode;
        throw error;
    }
    array.forEach((value, index) => {
        if (!value) {
            const error = new Error(`${message} at index ${index}`);
            error.statusCode = statusCode;
            throw error;
        }
    });
    return true;
};

// Email validation
const isEmail = (email, message = "Invalid email format", statusCode = 400) => {
    if (typeof email !== "string") {
        const error = new Error("Email must be a string");
        error.statusCode = statusCode;
        throw error;
    }
    const emailRegex = /^[^\s@]+@[^\s@]+\.[^\s@]+$/;
    if (!emailRegex.test(email)) {
        const error = new Error(message);
        error.statusCode = statusCode;
        throw error;
    }
    return true;
};

// Minimum length validation
const minLength = (value, min, message = `Must be at least ${min} characters`, statusCode = 400) => {
    if (typeof value !== "string") {
        const error = new Error("Input must be a string");
        error.statusCode = statusCode;
        throw error;
    }
    if (value.length < min) {
        const error = new Error(message);
        error.statusCode = statusCode;
        throw error;
    }
    return true;
};

// Number validation
const isNumber = (value, message = "Must be a number", statusCode = 400) => {
    if (typeof value === "boolean" || isNaN(value) || value === null || value === "") {
        const error = new Error(message);
        error.statusCode = statusCode;
        throw error;
    }
    return true;
};

module.exports = { isTrue, isTrues, isEmail, minLength, isNumber };