chore: add more field types (#1141)

Adds a number of new field types and capabilities to existing fields.

A massive change with far too many moving pieces to document in a single commit.

packages/lib/advanced-fields-validation/validate-text.ts

@@ -0,0 +1,33 @@
+interface TextFieldMeta {
+  characterLimit?: number;
+  readOnly?: boolean;
+  required?: boolean;
+}
+
+export const validateTextField = (
+  value: string,
+  fieldMeta: TextFieldMeta,
+  isSigningPage: boolean = false,
+): string[] => {
+  const errors = [];
+
+  const { characterLimit, readOnly, required } = fieldMeta;
+
+  if (required && !value && isSigningPage) {
+    errors.push('Value is required');
+  }
+
+  if (characterLimit !== undefined && characterLimit > 0 && value.length > characterLimit) {
+    errors.push(`Value length (${value.length}) exceeds the character limit (${characterLimit})`);
+  }
+
+  if (readOnly && value.length < 1) {
+    errors.push('A read-only field must have text');
+  }
+
+  if (readOnly && required) {
+    errors.push('A field cannot be both read-only and required');
+  }
+
+  return errors;
+};