File reorganisation

Signed-off-by: Avior <github@avior.me>

src/Request.ts

@@ -0,0 +1,51 @@
+import TCGdex from './tcgdex'
+
+export default class RequestWrapper {
+	private static cache: Array<Request<any>> = []
+
+	public static getRequest<T>(url: string) {
+		let req = this.cache.find((req) => req.url === url) as Request<T>|undefined
+		if (!req) {
+			req = new Request<T>(url)
+			this.cache.push(req)
+		}
+		return req
+	}
+}
+
+export class Request<T = any> {
+	public static ttl = 1000 * 60 * 60 // 1 hour
+
+	private response?: T
+	private fetched?: Date
+
+	public constructor(
+		public url: string // url is public for quick url test
+	) {}
+
+	public async get(): Promise<T | undefined> {
+		const now = new Date()
+		// if reponse was already fetched and TTL was not passed
+		if (
+			this.fetched &&
+			this.response &&
+			now.getTime() - this.fetched.getTime() < Request.ttl
+		) {
+			return this.response
+		}
+
+		// Fetch Response
+		const unfetch = TCGdex.fetch
+		const resp = await unfetch(this.url, {
+			headers: {
+				'user-agent': `@tcgdex/javascript-sdk/${TCGdex.VERSION}`
+			}
+		})
+		if (resp.status !== 200) {
+			return undefined
+		}
+		this.response = await resp.json()
+		this.fetched = now
+		return this.response
+	}
+}