add getFeedItemsId (#8)

* add getFeedItemsId

* Update src/types/feedItem.ts

Co-authored-by: Aidan Musnitzky <musnit@gmail.com>

* rename getFeedItemsId

* bump version

---------

Co-authored-by: Aidan Musnitzky <musnit@gmail.com>

Author: annasborysova

package.json

@@ -1,6 +1,6 @@
 {
     "name": "api-utils",
-    "version": "0.0.3",
+    "version": "0.0.4",
     "description": "Utilities for interacting with the Spinamp API",
     "main": "dist/index.js",
     "types": "dist/index.d.ts",

src/index.ts

@@ -18,3 +18,6 @@ export {
   MintPreconditionError,
   NotFollowingError,
 } from "./types/mint";
+export {
+  getFeedItemId,
+} from "./types/feedItem";

src/types/feedItem.ts

@@ -0,0 +1,7 @@
+export const getFeedItemId = (data: any): string => {
+    if (!data.userId || !data.entityType || !data.entityId) {
+        throw new Error('Missing feedItem data')
+    }
+
+    return `${data.userId}/${data.entityType}/${data.entityId}`
+}