124 lines
2.6 KiB
TypeScript
124 lines
2.6 KiB
TypeScript
/**
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* Form validation utilities
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*/
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/**
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* Validate email format
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*/
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export function isValidEmail(email: string): boolean {
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// Basic email format check
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const emailRegex = /^[^\s@]+@[^\s@]+\.[^\s@]+$/;
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if (!emailRegex.test(email)) {
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return false;
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}
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// Additional checks for invalid patterns
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// Reject consecutive dots
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if (email.includes("..")) {
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return false;
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}
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return true;
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}
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/**
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* Password strength levels
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*/
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export type PasswordStrength = "weak" | "fair" | "good" | "strong";
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/**
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* Validate password strength with comprehensive requirements
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*/
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export function validatePassword(password: string): {
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isValid: boolean;
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errors: string[];
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strength: PasswordStrength;
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} {
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const errors: string[] = [];
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// Minimum length: 12 characters
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if (password.length < 12) {
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errors.push("Password must be at least 12 characters long");
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}
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// Require uppercase letter
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if (!/[A-Z]/.test(password)) {
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errors.push("Password must contain at least one uppercase letter");
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}
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// Require lowercase letter
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if (!/[a-z]/.test(password)) {
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errors.push("Password must contain at least one lowercase letter");
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}
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// Require number
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if (!/[0-9]/.test(password)) {
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errors.push("Password must contain at least one number");
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}
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// Require special character
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if (!/[^A-Za-z0-9]/.test(password)) {
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errors.push("Password must contain at least one special character");
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}
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// Check for common weak passwords
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const commonPasswords = [
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"password",
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"12345678",
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"qwerty",
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"letmein",
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"welcome",
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"monkey",
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"dragon",
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"master",
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"sunshine",
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"princess",
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"admin",
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"login"
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];
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const lowerPassword = password.toLowerCase();
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for (const common of commonPasswords) {
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if (lowerPassword.includes(common)) {
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errors.push("Password contains common patterns and is not secure");
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break;
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}
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}
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// Calculate password strength
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let strength: PasswordStrength = "weak";
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if (errors.length === 0) {
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if (password.length >= 20) {
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strength = "strong";
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} else if (password.length >= 16) {
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strength = "good";
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} else if (password.length >= 12) {
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strength = "fair";
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}
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}
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return {
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isValid: errors.length === 0,
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errors,
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strength
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};
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}
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/**
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* Check if two passwords match
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*/
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export function passwordsMatch(
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password: string,
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confirmation: string
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): boolean {
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return password === confirmation && password.length > 0;
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}
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/**
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* Validate display name
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*/
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export function isValidDisplayName(name: string): boolean {
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return name.trim().length >= 1 && name.trim().length <= 50;
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}
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