Add PredefinedContentHelper

Author: gcatanese

src/__tests__/terminalAPIPredefinedContentHelper.spec.ts

@@ -0,0 +1,46 @@
+import { PredefinedContentHelper, DisplayNotificationEvent } from "../typings/terminal/predefinedContentHelper";
+
+describe("PredefinedContentHelper", () => {
+    it("should extract a valid event", () => {
+        
+        const ReferenceID = "TransactionID=oLkO001517998574000&TimeStamp=2018-02-07T10%3a16%3a14.000Z&event=PIN_ENTERED";
+        
+        const helper = new PredefinedContentHelper(ReferenceID);
+        expect(helper.getEvent()).toBe(DisplayNotificationEvent.PIN_ENTERED);
+    });
+
+    it("should return null for an invalid event", () => {
+        const helper = new PredefinedContentHelper("event=INVALID_EVENT");
+        expect(helper.getEvent()).toBeNull();
+    });
+
+    it("should extract TransactionID", () => {
+        const helper = new PredefinedContentHelper("TransactionID=12345&TimeStamp=2018-02-07T10%3a16%3a14.000Z&event=PIN_ENTERED");
+        expect(helper.getTransactionId()).toBe("12345");
+    });
+
+    it("should extract TimeStamp", () => {
+        const helper = new PredefinedContentHelper("TimeStamp=2024-07-11T12:00:00Z");
+        expect(helper.getTimeStamp()).toBe("2024-07-11T12:00:00Z");
+    });
+
+    it("should extract arbitrary key", () => {
+        const helper = new PredefinedContentHelper("foo=bar&baz=qux");
+        expect(helper.get("foo")).toBe("bar");
+        expect(helper.get("baz")).toBe("qux");
+        expect(helper.get("missing")).toBeNull();
+    });
+
+    it("should convert params to object", () => {
+        const helper = new PredefinedContentHelper("a=1&b=2&event=WAIT_FOR_PIN");
+        expect(helper.toObject()).toEqual({ a: "1", b: "2", event: "WAIT_FOR_PIN" });
+    });
+
+    it("should handle empty referenceId", () => {
+        const helper = new PredefinedContentHelper("");
+        expect(helper.getEvent()).toBeNull();
+        expect(helper.getTransactionId()).toBeNull();
+        expect(helper.getTimeStamp()).toBeNull();
+        expect(helper.toObject()).toEqual({});
+    });
+});

src/typings/terminal/models.ts

@@ -265,6 +265,8 @@ export * from "./transmitResponse";
 export * from "./uTMCoordinates";
 export * from "./unitOfMeasureType";
 export * from "./versionType";
+// helpers
+export * from "./predefinedContentHelper";
 
 import { AbortRequest } from "./abortRequest";
 import { AccountType } from "./accountType";

src/typings/terminal/predefinedContentHelper.ts

@@ -0,0 +1,103 @@
+/**
+ * PredefinedContentHelper class to parse and manage predefined content reference IDs.
+ */
+export class PredefinedContentHelper {
+    private params: URLSearchParams;
+
+    constructor(referenceId: string) {
+        this.params = new URLSearchParams(referenceId);
+    }
+
+    /**
+     * Extracts and validates the `event` value from the ReferenceID.
+     *
+     * @returns A valid `DisplayNotificationEvent`, otherwise `null`.
+     *
+     * @example
+     * const helper = new PredefinedContentHelper("...&event=PIN_ENTERED");
+     * const event = helper.getEvent(); // DisplayNotificationEvent.PIN_ENTERED or null
+     */
+    getEvent(): DisplayNotificationEvent | null {
+        const event = this.params.get("event");
+
+        switch (event) {
+            case "TENDER_CREATED":
+            case "CARD_INSERTED":
+            case "CARD_PRESENTED":
+            case "CARD_SWIPED":
+            case "WAIT_FOR_APP_SELECTION":
+            case "APPLICATION_SELECTED":
+            case "ASK_SIGNATURE":
+            case "CHECK_SIGNATURE":
+            case "SIGNATURE_CHECKED":
+            case "WAIT_FOR_PIN":
+            case "PIN_ENTERED":
+            case "PRINT_RECEIPT":
+            case "RECEIPT_PRINTED":
+            case "CARD_REMOVED":
+            case "TENDER_FINAL":
+            case "ASK_DCC":
+            case "DCC_ACCEPTED":
+            case "DCC_REJECTED":
+            case "ASK_GRATUITY":
+            case "GRATUITY_ENTERED":
+            case "BALANCE_QUERY_STARTED":
+            case "BALANCE_QUERY_COMPLETED":
+            case "LOAD_STARTED":
+            case "LOAD_COMPLETED":
+            case "PROVIDE_CARD_DETAILS":
+            case "CARD_DETAILS_PROVIDED":
+                return event as DisplayNotificationEvent;
+            default:
+                return null;
+        }
+    }
+    getTransactionId(): string | null {
+        return this.params.get("TransactionID");
+    }
+
+    getTimeStamp(): string | null {
+        return this.params.get("TimeStamp");
+    }
+
+    get(key: string): string | null {
+        return this.params.get(key);
+    }
+
+    toObject(): Record<string, string> {
+        const result: Record<string, string> = {};
+        for (const [key, value] of this.params.entries()) {
+            result[key] = value;
+        }
+        return result;
+    }
+}
+
+export enum DisplayNotificationEvent {
+    TENDER_CREATED = "TENDER_CREATED",
+    CARD_INSERTED = "CARD_INSERTED",
+    CARD_PRESENTED = "CARD_PRESENTED",
+    CARD_SWIPED = "CARD_SWIPED",
+    WAIT_FOR_APP_SELECTION = "WAIT_FOR_APP_SELECTION",
+    APPLICATION_SELECTED = "APPLICATION_SELECTED",
+    ASK_SIGNATURE = "ASK_SIGNATURE",
+    CHECK_SIGNATURE = "CHECK_SIGNATURE",
+    SIGNATURE_CHECKED = "SIGNATURE_CHECKED",
+    WAIT_FOR_PIN = "WAIT_FOR_PIN",
+    PIN_ENTERED = "PIN_ENTERED",
+    PRINT_RECEIPT = "PRINT_RECEIPT",
+    RECEIPT_PRINTED = "RECEIPT_PRINTED",
+    CARD_REMOVED = "CARD_REMOVED",
+    TENDER_FINAL = "TENDER_FINAL",
+    ASK_DCC = "ASK_DCC",
+    DCC_ACCEPTED = "DCC_ACCEPTED",
+    DCC_REJECTED = "DCC_REJECTED",
+    ASK_GRATUITY = "ASK_GRATUITY",
+    GRATUITY_ENTERED = "GRATUITY_ENTERED",
+    BALANCE_QUERY_STARTED = "BALANCE_QUERY_STARTED",
+    BALANCE_QUERY_COMPLETED = "BALANCE_QUERY_COMPLETED",
+    LOAD_STARTED = "LOAD_STARTED",
+    LOAD_COMPLETED = "LOAD_COMPLETED",
+    PROVIDE_CARD_DETAILS = "PROVIDE_CARD_DETAILS",
+    CARD_DETAILS_PROVIDED = "CARD_DETAILS_PROVIDED",
+}