Adds new json fetch for either error or json

Author: JWittmeyer

basic-fetch.ts

@@ -5,6 +5,7 @@ export enum FetchType {
     DELETE = "DELETE",
 }
 
+// error logic faulty => does both, error & not error if both are provided
 export function jsonFetchWrapper(url: string, fetchType: FetchType, onResult?: (result: any) => void, body?: BodyInit, headers?: any, onError?: (response: any) => void) {
     if (!headers) headers = {};
     headers["Content-Type"] = "application/json";
@@ -30,6 +31,24 @@ export function jsonFetchWrapper(url: string, fetchType: FetchType, onResult?: (
 
 }
 
+//runs either onError or onResult, not both
+export function jsonFetchWrapperEitherOr(url: string, fetchType: FetchType, onResult?: (result: any) => void, body?: BodyInit, headers?: any, onError?: (response: any) => void) {
+    if (!headers) headers = {};
+    headers["Content-Type"] = "application/json";
+
+    const finalOnError = onError ? onError : ((response: any) => { throw new Error("Error in request at " + url) });
+    fetch(url, {
+        method: fetchType,
+        headers: headers,
+        body: body,
+    }).then(response => {
+        if (!response.ok) return response.text().then((text) => finalOnError(text));
+        else return response.json().then((json) => onResult(json));
+    }, (error) => {
+        console.log("Error in request at " + url);
+    });
+}
+
 export function textFetchWrapper(url: string, fetchType: FetchType, onResult?: (result: any) => void, body?: BodyInit, headers?: any) {
     if (!headers) headers = {};
     headers["Content-Type"] = "application/json";