add util for pulling IDs from claims

packages/artifact/src/internal/util.ts

@@ -0,0 +1,36 @@
+import { getRuntimeToken } from './config';
+
+export interface BackendIds {
+    workflowRunBackendId: string;
+    workflowJobRunBackendId: string;
+}
+
+export function getBackendIds(): BackendIds {
+    const token = getRuntimeToken();
+    const parsedToken = JSON.parse(Buffer.from(token.split('.')[1], 'base64').toString())
+    if (!parsedToken["scp"]) {
+        throw new Error('Unable to get scp from token')
+    }
+
+    const scp = parsedToken["scp"]
+    const scpParts = scp.split(' ')
+    if (scpParts.length == 0) {
+        throw new Error('No scp parts found')
+    }
+
+    for (const part of scpParts) {
+        const partParts = part.split(':')
+        if(partParts.length == 0) {
+            continue
+        }
+
+        if (partParts[0] == "Actions.Results") {
+            if (partParts.length == 3) {
+                return {workflowRunBackendId: partParts[1], workflowJobRunBackendId: partParts[2]}
+            }
+            throw new Error('Unable to parse Actions.Results scp part')
+        }
+    }
+
+    throw new Error('Unable to find ids')
+}