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src/app/utils/zod.ts

@@ -23,28 +23,41 @@ export const zodDataUrlSchema = z.string().refine(value => zodDataUrlRegex.test(
   message: 'Invalid data URL',
 });
 
+
+//===============================================================================
 /**
- * Validates if a string is a valid data URL.
+ * A schema for validating Base64 encoded strings.
  *
- * @param url - The string to validate as a data URL.
- * @returns {void} - Logs the result of the validation.
+ * This schema checks if the string is valid Base64 and ensures that the first 20 characters
+ * do not contain a comma.
  *
  * @example
- * validateDataUrl('data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAUAAAAFCAYAAACNbyblAAAAHElEQVQI12P4//8/w38GIAXDCAAAAC0BEMAAW9R3AAAAAElFTkSuQmCC');
- * // Output: Valid data URL: data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAUAAAAFCAYAAACNbyblAAAAHElEQVQI12P4//8/w38GIAXDCAAAAC0BEMAAW9R3AAAAAElFTkSuQmCC
- * 
- * validateDataUrl('invalid-url');
- * // Output: Validation error: [ ... ]
+ * ```typescript
+ * const validString = 'SGVsbG8sIHdvcmxkIQ=='; // Base64 for "Hello, world!"
+ * const invalidString = 'SGVsbG8sIHdvcmxkIQ,,=='; // Invalid due to commas
+ *
+ * console.log(base64Schema.safeParse(validString).success); // true
+ * console.log(base64Schema.safeParse(invalidString).success); // false
+ * ```
  */
-const validateDataUrl = (url: string) => {
-  const result: any = zodDataUrlSchema.safeParse(url);
-  if (result.success) {
-    console.log('Valid data URL:', url);
-  } else {
-    console.error('Validation error:', result.error.errors);
-  }
-};
+export const base64Schema = z.string().refine(value => {
+  // Regular expression for Base64 validation
+  const isBase64 = /^[A-Za-z0-9+/=]*$/.test(value) && (value.length % 4 === 0);
+  // Check if the first 20 characters do not contain a comma
+  return isBase64 && !value.substring(0, 20).includes(',');
+}, {
+  message: 'Invalid Base64 string or comma found in the first 20 characters'
+});
 
-// Test the schema
-validateDataUrl('data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAUAAAAFCAYAAACNbyblAAAAHElEQVQI12P4//8/w38GIAXDCAAAAC0BEMAAW9R3AAAAAElFTkSuQmCC');
-validateDataUrl('invalid-url');
+/**
+ * Validates a given string against the Base64 schema.
+ *
+ * @param input - The string to validate.
+ * @returns `true` if the input is valid according to the schema, `false` otherwise.
+ *
+ * @example
+ * ```typescript
+ * console.log(validateInput('SGVsbG8sIHdvcmxkIQ==')); // true
+ * console.log(validateInput('SGVsbG8sIHdvcmxkIQ,,==')); // false
+ * ```
+ */

src/app/utils/zodValidation.ts

@@ -0,0 +1,11 @@
+import { err, ok } from 'neverthrow';
+import { ZodError, ZodSchema, z } from 'zod';
+export function zodSafeValidation<T>(schema: ZodSchema, data) {
+  const validation = (schema as ZodSchema<T>).safeParse(data)
+
+  if(validation.success) {
+    return ok(validation.data)
+  } else {
+    return err((validation.error))
+  }
+}