Added a new setter and getter for preferredStyleSchemes to throw if type is not an eventTicket and moved PreferredStyleSchemes schemas

src/PKPass.ts

@@ -316,6 +316,44 @@ export default class PKPass extends Bundle {
 		return this[propsSymbol][this.type].backFields;
 	}
 
+	/**
+	 * Allows accessing to iOS 18 new Event Ticket
+	 * property `preferredStyleSchemes`.
+	 *
+	 * @throws (automatically) if current type is not
+	 * "eventTicket".
+	 */
+
+	public get preferredStyleSchemes(): Schemas.PreferredStyleSchemes {
+		return this[propsSymbol]["eventTicket"].preferredStyleSchemes;
+	}
+
+	/**
+	 * Allows setting a preferredStyleSchemes property
+	 * for a eventTicket.
+	 *
+	 * @throws if current type is not "eventTicket".
+	 * @param value
+	 */
+
+	public set preferredStyleSchemes(value: Schemas.PreferredStyleSchemes) {
+		Utils.assertUnfrozen(this);
+
+		if (this.type !== "eventTicket") {
+			throw new TypeError(
+				Messages.PREFERRED_STYLE_SCHEMES.UNEXPECTED_PASS_TYPE,
+			);
+		}
+
+		Schemas.assertValidity(
+			Schemas.PreferredStyleSchemes,
+			value,
+			Messages.PREFERRED_STYLE_SCHEMES.INVALID,
+		);
+
+		this[propsSymbol]["eventTicket"].preferredStyleSchemes = value;
+	}
+
 	/**
 	 * Allows setting a pass type.
 	 *

src/messages.ts

@@ -15,6 +15,13 @@ export const TRANSIT_TYPE = {
 		"Cannot set transitType because not compliant with Apple specifications. Refer to https://apple.co/3DHuAG4 for more - %s",
 } as const;
 
+export const PREFERRED_STYLE_SCHEMES = {
+	UNEXPECTED_PASS_TYPE:
+		"Cannot set preferredStyleSchemes on a pass with type different from eventTicket.",
+	INVALID:
+		"Cannot set preferredStyleSchemes because not compliant with Apple specifications - %s",
+} as const;
+
 export const PASS_TYPE = {
 	INVALID:
 		"Cannot set type because not compliant with Apple specifications. Refer to https://apple.co/3aFpSfg for a list of valid props - %s",

src/schemas/PassFields.ts

@@ -12,6 +12,13 @@ export const TransitType = Joi.string().regex(
 	/(PKTransitTypeAir|PKTransitTypeBoat|PKTransitTypeBus|PKTransitTypeGeneric|PKTransitTypeTrain)/,
 );
 
+export type PreferredStyleSchemes = ("posterEventTicket" | "eventTicket")[];
+
+export const PreferredStyleSchemes = Joi.array().items(
+	"posterEventTicket",
+	"eventTicket",
+) satisfies Joi.Schema<PreferredStyleSchemes>;
+
 export interface PassFields {
 	auxiliaryFields: FieldWithRow[];
 	backFields: Field[];

src/schemas/index.ts

@@ -15,7 +15,7 @@ import { Barcode } from "./Barcode";
 import { Location } from "./Location";
 import { Beacon } from "./Beacon";
 import { NFC } from "./NFC";
-import { PassFields, TransitType } from "./PassFields";
+import { PassFields, PreferredStyleSchemes, TransitType } from "./PassFields";
 import { Semantics } from "./Semantics";
 import { CertificatesSchema } from "./Certificates";
 
@@ -75,7 +75,7 @@ export interface PassProps {
 		 * so on, are not necessary anymore for the new style,
 		 * as semantics are preferred.
 		 */
-		preferredStyleSchemes?: ("posterEventTicket" | "eventTicket")[];
+		preferredStyleSchemes?: PreferredStyleSchemes;
 	};
 	coupon?: PassFields;
 	generic?: PassFields;
@@ -158,9 +158,7 @@ export const PassKindsProps = Joi.object<PassKindsProps>({
 			 * so on, are not necessary anymore for the new style,
 			 * as semantics are preferred.
 			 */
-			preferredStyleSchemes: Joi.array().items(
+			preferredStyleSchemes: PreferredStyleSchemes,
-				Joi.string().allow("posterEventTicket", "eventTicket"),
-			),
 		}),
 	),
 	boardingPass: PassFields,
@@ -240,7 +238,7 @@ export const Template = Joi.object<Template>({
  */
 
 export function assertValidity<T>(
-	schema: Joi.ObjectSchema<T> | Joi.StringSchema,
+	schema: Joi.ObjectSchema<T> | Joi.StringSchema | Joi.Schema<T>,
 	data: T,
 	customErrorMessage?: string,
 ): void {