migrating

src/lib/validation.ts

@@ -0,0 +1,95 @@
+/**
+ * Form validation utilities
+ */
+
+/**
+ * Validate email format
+ */
+export function isValidEmail(email: string): boolean {
+  const emailRegex = /^[^\s@]+@[^\s@]+\.[^\s@]+$/;
+  return emailRegex.test(email);
+}
+
+/**
+ * Validate password strength
+ */
+export function validatePassword(password: string): {
+  isValid: boolean;
+  errors: string[];
+} {
+  const errors: string[] = [];
+  
+  if (password.length < 8) {
+    errors.push("Password must be at least 8 characters long");
+  }
+  
+  // Optional: Add more password requirements
+  // if (!/[A-Z]/.test(password)) {
+  //   errors.push("Password must contain at least one uppercase letter");
+  // }
+  // if (!/[a-z]/.test(password)) {
+  //   errors.push("Password must contain at least one lowercase letter");
+  // }
+  // if (!/[0-9]/.test(password)) {
+  //   errors.push("Password must contain at least one number");
+  // }
+  
+  return {
+    isValid: errors.length === 0,
+    errors,
+  };
+}
+
+/**
+ * Check if two passwords match
+ */
+export function passwordsMatch(password: string, confirmation: string): boolean {
+  return password === confirmation && password.length > 0;
+}
+
+/**
+ * Validate display name
+ */
+export function isValidDisplayName(name: string): boolean {
+  return name.trim().length >= 1 && name.trim().length <= 50;
+}
+
+/**
+ * Sanitize user input (basic XSS prevention)
+ */
+export function sanitizeInput(input: string): string {
+  return input
+    .replace(/</g, "&lt;")
+    .replace(/>/g, "&gt;")
+    .replace(/"/g, "&quot;")
+    .replace(/'/g, "&#x27;")
+    .replace(/\//g, "&#x2F;");
+}
+
+/**
+ * Check if string is a valid URL
+ */
+export function isValidUrl(url: string): boolean {
+  try {
+    new URL(url);
+    return true;
+  } catch {
+    return false;
+  }
+}
+
+/**
+ * Validate file type for uploads
+ */
+export function isValidImageType(file: File): boolean {
+  const validTypes = ["image/jpeg", "image/jpg", "image/png", "image/gif", "image/webp"];
+  return validTypes.includes(file.type);
+}
+
+/**
+ * Validate file size (in bytes)
+ */
+export function isValidFileSize(file: File, maxSizeMB: number = 5): boolean {
+  const maxBytes = maxSizeMB * 1024 * 1024;
+  return file.size <= maxBytes;
+}