Modify the behavior of the download invitations button to send them via email

app/api/abstract-api.tsx

@@ -10,6 +10,8 @@ export interface Api<T extends Entity> {
   create(serializable: Serializable<T>, object: T, callback: (object: T) => void): void;
   update(serializable: Serializable<T>, object: T, callback: () => void): void;
   destroy(serializable: Serializable<T>, object: T, callback: () => void): void;
+
+  post(serializable: Serializable<T>, path: string, callback: () => void): void;
 }
 
 export interface Serializable<T> {
@@ -98,4 +100,14 @@ export class AbstractApi<T extends Entity> implements Api<T> {
     }).then(callback)
       .catch((error) => console.error(error));
   }
+
+  post(serializable: Serializable<T>, path: string, callback: () => void): void {
+    fetch(`/api/${getSlug()}/${serializable.apiPath()}/${path}`, {
+      method: 'POST',
+      headers: {
+        'X-CSRF-TOKEN': getCsrfToken(),
+      }
+    }).then(callback)
+      .catch((error) => console.error(error));
+  }
 }

app/ui/invitations/board.tsx

@@ -146,9 +146,9 @@ export default function InvitationsBoard({ guests, invitations: originalInvitati
   }
 
   function handleDownloadQrCodes() {
-    api.getAllPdf(serializer, () => {
+    api.post(serializer, 'email', () => {
-      console.log("QR codes downloaded");
+      console.log("Email scheduled to be sent with QR codes.");
-    });
+    })
   }
 
   return (
@@ -180,7 +180,7 @@ export default function InvitationsBoard({ guests, invitations: originalInvitati
           onClick={handleDownloadQrCodes}
           className={classNames('primary')}
         >
-          Download QR codes
+          Send QR codes via email
         </button>