Add getLastCommitedStateIndex

src/services/service.ts

@@ -1435,6 +1435,17 @@ export default class Services {
     }
   }
 
+  public getLastCommitedStateIndex(process: Process): number | null {
+    if (process.states.length === 0) return null;
+    const processTip = process.states[process.states.length - 1].commited_in;
+    for (let i = process.states.length - 1; i >= 0; i--) {
+      if (process.states[i].commited_in !== processTip) {
+        return i;
+      }
+    }
+    return null;
+  }
+
   public getStateFromId(process: Process, stateId: string): ProcessState | null {
     if (process.states.length === 0) return null;
     const state = process.states.find(state => state.state_id === stateId);