feat(domain): Implement conflict error handling in domain

prisma/schema.prisma

@@ -414,7 +414,7 @@ model Slots {
   mentor     Mentor     @relation(fields: [mentorId], references: [userId])
   lockedBy   String
   user       User       @relation(fields: [lockedBy], references: [id])
-  date       DateTime
+  date       DateTime   @db.Date
   startTime  Int
   endTime    Int
   expiresAt  DateTime

src/application/useCases/booking/CreateBookingIntent.usecase.ts

@@ -5,6 +5,7 @@ import type { IPaymentService } from "@application/ports/services/IPaymentServic
 import type { ICreateBookingIntentUsecase } from "@application/ports/usecase/booking/ICreateBookingIntent.usecase";
 import type { CreateOrderResponse } from "@application/types/PaymentService.types";
 import { TYPES } from "@config/DI-container/TYPES";
+import { ConflictError } from "@domain/errors/ConflictError";
 import { DayOfWeekIndex } from "@domain/mentor/entities/availability.entity";
 import { inject, injectable } from "inversify";
 @injectable()
@@ -31,17 +32,26 @@ export class CreateBookingIntentUsecase implements ICreateBookingIntentUsecase {
 		);
 
 		if (!availability) {
-			throw new Error("Requested time slot is not available.");
+			throw new ConflictError("Mentor is unavailable for the requested time");
 		}
+		console.log("date", data.date.toLocaleDateString("en-CA"));
+		// store the day with same time to avoid issues with data comparison
+		const date = new Date(
+			`${data.date.toLocaleDateString("en-CA")}T00:00:00.000Z`,
+		);
+		console.log(date);
+
 		const slot = await this._slotRepository.checkOverlap(
 			data.mentorId,
-			data.date,
+			date,
 			data.startTime,
 			data.endTime,
 		);
-
+		console.log("slot", slot);
 		if (slot) {
-			throw new Error("Requested time slot overlaps with an existing booking.");
+			throw new ConflictError(
+				"Requested time slot overlaps with an existing booking.",
+			);
 		}
 
 		const order = await this._paymentService.createOrder({
@@ -50,6 +60,7 @@ export class CreateBookingIntentUsecase implements ICreateBookingIntentUsecase {
 		});
 		const finalData = {
 			...data,
+			date,
 			orderId: order.orderId,
 			provider: this._paymentService.getPaymentProviderName(),
 		};

src/domain/errors/ConflictError.ts

@@ -0,0 +1,12 @@
+import { DomainError } from "./DomainError.abstract";
+import { DomainErrorCode } from "./DomainErrorCode";
+
+export class ConflictError extends DomainError {
+	serialize(): { message: string; field?: string }[] {
+		return [{ message: this.message }];
+	}
+
+	constructor(message: string = "Resource already exists") {
+		super(DomainErrorCode.CONFLICT, message);
+	}
+}

src/domain/errors/DomainErrorCode.ts

@@ -4,6 +4,7 @@ export const DomainErrorCode = {
 	BAD_REQUEST: "BAD_REQUEST",
 	UNAUTHORIZED: "UNAUTHORIZED",
 	FORBIDDEN: "FORBIDDEN",
+	CONFLICT: "CONFLICT",
 } as const;
 
 // This extracts the values into a strict TypeScript type

src/presentation/constants/httpStatusForErrorCode.ts

@@ -10,6 +10,7 @@ const errorCodeToHttpStatusMap: Record<ErrorCode, HTTPSTATUSTYPE> = {
 	[DomainErrorCode.NOT_FOUND]: HTTPSTATUS.NOT_FOUND,
 	[DomainErrorCode.ALREADY_EXISTS]: HTTPSTATUS.CONFLICT,
 	[AppErrorCode.INVALID_CREDENTIALS]: HTTPSTATUS.BAD_REQUEST,
+	[DomainErrorCode.CONFLICT]: HTTPSTATUS.CONFLICT,
 };
 
 export const getHttpStatusForErrorCode = (code: ErrorCode): HTTPSTATUSTYPE => {