allow makeAPIRequest() to handle JSON requests

truthinquiry/static/js/api.js

@@ -6,13 +6,23 @@
  * @returns a Promise, which resolves when the server can be reached and responds without an error
  * and rejects otherwise
  */
-async function makeAPIRequest(endpoint, body) {
-    return new Promise((resolve, reject) => {
-        const fetchOptions = {
+async function makeAPIRequest(endpoint, body, options={}) {
+    let fetchOptions = {
         method: "POST",
-            body: new URLSearchParams(body)
+        headers: {
+            'Accept': 'application/json'
+        }
     };
 
+    if (options["content"] === 'json') {
+        fetchOptions["headers"]["Content-Type"] = 'application/json'
+        fetchOptions["body"] = JSON.stringify(body)
+    } else {
+        fetchOptions["body"] = new URLSearchParams(body);
+    }
+
+    return new Promise((resolve, reject) => {
+
         fetch("/api/v1/" + endpoint, fetchOptions).then(response => {
             const responseCode = response.status;
             if (responseCode >= 500) {