feat(helper): ✨ add BookDeleteHelper for delete route

src/config/routes/books/delete.ts

@@ -1,8 +1,7 @@
 import { FastifyInstance } from 'fastify'
 
 import { RequestGeneric } from '#config/typing/requests'
-import PaprAudibleBookHelper from '#helpers/database/audible/PaprAudibleBookHelper'
-import RedisHelper from '#helpers/database/RedisHelper'
+import BookDeleteHelper from '#helpers/routes/BookDeleteHelper'
 import SharedHelper from '#helpers/shared'
 
 async function _delete(fastify: FastifyInstance) {
@@ -16,20 +15,18 @@ async function _delete(fastify: FastifyInstance) {
 		}
 
 		// Setup Helpers
-		const paprHelper = new PaprAudibleBookHelper(request.params.asin, {})
 		const { redis } = fastify
-		const redisHelper = new RedisHelper(redis, 'book', request.params.asin)
+		const helper = new BookDeleteHelper(request.params.asin, redis)
 
-		// Get book from database
-		const existingBook = await paprHelper.findOne()
+		// Call helper handler
+		const isHandled = await helper.handler()
 
-		if (!existingBook) {
+		if (!isHandled) {
 			reply.code(404)
 			throw new Error(`${request.params.asin} not found in the database`)
 		}
 
-		await redisHelper.deleteOne()
-		return paprHelper.delete()
+		return { message: `${request.params.asin} deleted` }
 	})
 }
 

src/helpers/routes/BookDeleteHelper.ts

@@ -0,0 +1,50 @@
+import { FastifyRedis } from '@fastify/redis'
+
+import { BookDocument } from '#config/models/Book'
+import PaprAudibleBookHelper from '#helpers/database/audible/PaprAudibleBookHelper'
+import RedisHelper from '#helpers/database/RedisHelper'
+
+export default class BookDeleteHelper {
+	asin: string
+	paprHelper: PaprAudibleBookHelper
+	redisHelper: RedisHelper
+	originalBook: BookDocument | null = null
+	constructor(asin: string, redis: FastifyRedis | null) {
+		this.asin = asin
+		this.paprHelper = new PaprAudibleBookHelper(this.asin, {
+			seedAuthors: undefined,
+			update: undefined
+		})
+		this.redisHelper = new RedisHelper(redis, 'book', this.asin)
+	}
+
+	async getBookFromPapr(): Promise<BookDocument | null> {
+		return (await this.paprHelper.findOne()).data
+	}
+
+	/**
+	 * Actions to run when a deletion is requested
+	 */
+	async deleteActions() {
+		// 1. Delete the book from cache
+		await this.redisHelper.deleteOne()
+
+		// 2. Delete the book from DB
+		return (await this.paprHelper.delete()).modified
+	}
+
+	/**
+	 * Main handler for the book delete route
+	 */
+	async handler() {
+		this.originalBook = await this.getBookFromPapr()
+
+		// If the book is already present
+		if (this.originalBook) {
+			return this.deleteActions()
+		}
+
+		// If the book is not present
+		return false
+	}
+}