fix: Missing bookingId in BOOKING_CANCELLED webhook payload (calcom#22713)

* send bookingId in BOOKING_CANCELLED through requestReschedule

* fix: make customInputs nullable in BookingWebhookFactory

* fix: make customInputs nullable in BookingWebhookFactory

Author: hariombalhara

packages/lib/server/service/BookingWebhookFactory.ts

@@ -0,0 +1,127 @@
+import type { Person } from "@calcom/types/Calendar";
+import type { JsonValue } from "@calcom/types/JsonObject";
+
+function isObjectButNotArray(obj: unknown): obj is Record<string, unknown> {
+  return typeof obj === "object" && !Array.isArray(obj);
+}
+
+type DestinationCalendar = {
+  id: number;
+  integration: string;
+  externalId: string;
+  primaryEmail: string | null;
+  userId: number | null;
+  eventTypeId: number | null;
+  credentialId: number | null;
+  createdAt: Date | null;
+  updatedAt: Date | null;
+  delegationCredentialId: string | null;
+  domainWideDelegationCredentialId: string | null;
+};
+
+type Response = {
+  label: string;
+  value: string | boolean | string[] | { value: string; optionValue: string } | Record<string, string>;
+  isHidden?: boolean | undefined;
+};
+
+interface BaseWebhookPayload {
+  bookingId: number;
+  title: string;
+  eventSlug: string | null;
+  description: string | null;
+  customInputs: JsonValue | null;
+  responses: Record<string, Response>;
+  userFieldsResponses: Record<string, Response>;
+  startTime: string;
+  endTime: string;
+  organizer: Person;
+  attendees: Person[];
+  uid: string;
+  location: string | null;
+  destinationCalendar: DestinationCalendar | null;
+  cancellationReason: string | null;
+  iCalUID: string | null;
+  smsReminderNumber?: string;
+  cancelledBy: string | null;
+}
+
+interface CancelledEventPayload extends BaseWebhookPayload {
+  cancelledBy: string;
+  cancellationReason: string;
+}
+
+export class BookingWebhookFactory {
+  private getType(params: BaseWebhookPayload) {
+    return params.eventSlug || params.title || "";
+  }
+
+  private getTitle(params: BaseWebhookPayload) {
+    return params.title || "";
+  }
+
+  private getDestinationCalendar(params: BaseWebhookPayload) {
+    return params.destinationCalendar ? [params.destinationCalendar] : [];
+  }
+
+  private getCustomInputs(params: BaseWebhookPayload) {
+    return isObjectButNotArray(params.customInputs) ? params.customInputs : undefined;
+  }
+
+  /**
+   * Creates base webhook payload with common fields
+   */
+  private createBasePayload(params: BaseWebhookPayload) {
+    const {
+      bookingId,
+      title,
+      eventSlug,
+      description,
+      customInputs,
+      startTime,
+      endTime,
+      uid,
+      location,
+      organizer,
+      attendees,
+      responses,
+      userFieldsResponses,
+      destinationCalendar,
+      smsReminderNumber,
+      iCalUID,
+    } = params;
+
+    const basePayload = {
+      bookingId,
+      type: this.getType(params),
+      title: this.getTitle(params),
+      description,
+      customInputs: this.getCustomInputs(params),
+      responses,
+      userFieldsResponses,
+      startTime,
+      endTime,
+      organizer,
+      attendees,
+      uid,
+      location,
+      destinationCalendar: this.getDestinationCalendar(params),
+      iCalUID,
+      smsReminderNumber,
+    };
+
+    return basePayload;
+  }
+
+  public createCancelledEventPayload(params: CancelledEventPayload) {
+    const basePayload = this.createBasePayload({
+      ...params,
+    });
+
+    return {
+      ...basePayload,
+      cancelledBy: params.cancelledBy,
+      cancellationReason: params.cancellationReason,
+    };
+  }
+}