fix: allow retries if API fails

src/content/pricing/pricestf.ts

@@ -1,5 +1,6 @@
 declare function GM_fetch(input: string | URL | globalThis.Request, init?: RequestInit): Promise<Response>
 import '../GM_fetch'
+import { logDebug } from '../utils/log'
 
 async function getPricesToken(): Promise<string> {
   return new Promise<any>((resolve, reject) => {
@@ -37,7 +38,7 @@ class PricesResponse {
  * @returns {Promise<PricesResponse>} Object containing 'keys' and 'metal' prices
  * @throws When authentication fails or API returns non-200 status code
  */
-async function priceUsingPricesTF(token: string, sku: string): Promise<PricesResponse> {
+async function priceUsingPricesTF(token: string, sku: string, retries: number = 3): Promise<PricesResponse> {
   // prices.tf
   // https://api2.prices.tf/prices/${sku}
   // Authorization: Bearer ${token}
@@ -65,11 +66,37 @@ async function priceUsingPricesTF(token: string, sku: string): Promise<PricesRes
         })
       }
     }
-    if (response.status === 200) {
+    switch (response.status) {
-      const json = await response.json()
+      case 200:
-      resolve({ keys: json['sellKeys'], metal: json['sellHalfScrap'] / 18.0 })
+        const json = await response.json()
-    } else {
+        resolve({ keys: json['sellKeys'], metal: json['sellHalfScrap'] / 18.0 })
-      reject(response.status)
+        break;
+      case 404:
+        reject("Not found in prices.tf")
+        break;
+      case 429:
+      case 503:
+        // Happens if we send too many requests in a short period of time
+        // Retry after a few seconds
+        if(retries > 0) {
+          logDebug(`Cloudflare rate limit exceeded, trying again after 2 seconds, ${retries} retries left`)
+          await new Promise(resolve => setTimeout(resolve, 2000));
+          try {
+            const retryResult = await priceUsingPricesTF(token, sku, retries - 1);
+            resolve(retryResult);
+          } catch (err) {
+            reject(err);
+          }
+        } else {
+          reject("Cloudflare rate limit exceeded, stopping")
+        }
+        break;
+      default:
+        // Something went wrong
+        logDebug(`Received ${response.status} error while pricing ${sku}`)
+        logDebug(`${JSON.stringify(response.headers)}`)
+        reject("Unknown error")
+        break;
     }
   })
 }