fix: add return code 400 Bad Request (#605)

Added an error response code to make 400 errors visible to the app.

This code is emitted by the backend when refusing a patch update to `/api/caregivers/profile/` due to an unsupported language.

Author: staceybeard

src/core/api-request.js

@@ -77,6 +77,9 @@ class ApiRequest {
         const errorData = !error.response ? null : ApiRequest.filterOutHTML(error.response.data);
         let opalError;
         switch (errorCode) {
+            case 400:
+                opalError = 'BAD_REQUEST';
+                break;
             case 404:
                 opalError = 'API_NOT_FOUND';
                 break;

src/error/const.js

@@ -11,6 +11,12 @@
  *                       because of the error.
  */
 const ERRORS = {
+    BAD_REQUEST: {
+        statusCode: 400,
+        logMessage: 'Server would not process request due to client error',
+        clientMessage: 'BAD_REQUEST',
+        encrypt: false,
+    },
     SNAPSHOT_VALIDATION: {
         statusCode: 400,
         logMessage: 'Firebase snapshot invalid',