feat: Added global warning for incomplete program chain

ref: N25B-450

src/pages/VisProgPage/VisProg.tsx

@@ -4,7 +4,7 @@ import {
   Panel,
   ReactFlow,
   ReactFlowProvider,
-  MarkerType,
+  MarkerType, getOutgoers
 } from '@xyflow/react';
 import '@xyflow/react/dist/style.css';
 import {type CSSProperties, useEffect, useState} from "react";
@@ -12,6 +12,7 @@ import {useShallow} from 'zustand/react/shallow';
 import orderPhaseNodeArray from "../../utils/orderPhaseNodes.ts";
 import useProgramStore from "../../utils/programStore.ts";
 import {DndToolbar} from './visualProgrammingUI/components/DragDropSidebar.tsx';
+import {type EditorWarning, globalWarning} from "./visualProgrammingUI/components/EditorWarnings.tsx";
 import {WarningsSidebar} from "./visualProgrammingUI/components/WarningSidebar.tsx";
 import type {PhaseNode} from "./visualProgrammingUI/nodes/PhaseNode.tsx";
 import useFlowStore from './visualProgrammingUI/VisProgStores.tsx';
@@ -90,6 +91,26 @@ const VisProgUI = () => {
     window.addEventListener('keydown', handler);
     return () => window.removeEventListener('keydown', handler);
   });
+  const {unregisterWarning, registerWarning} = useFlowStore();
+  useEffect(() => {
+    
+    if (checkPhaseChain()) {
+      unregisterWarning(globalWarning,'INCOMPLETE_PROGRAM');
+    } else {
+      // create global warning for incomplete program chain
+      const incompleteProgramWarning : EditorWarning = {
+        scope: {
+          id: globalWarning,
+          handleId: undefined
+        },
+        type: 'INCOMPLETE_PROGRAM',
+        severity: "ERROR",
+        description: "there is no complete phase chain from the startNode to the EndNode"
+      }
+
+      registerWarning(incompleteProgramWarning);
+    }
+  },[edges, registerWarning, unregisterWarning])
 
 
 
@@ -184,6 +205,24 @@ function graphReducer() {
     }); 
 }
 
+const checkPhaseChain = (): boolean => {
+  const {nodes, edges} = useFlowStore.getState();
+
+  function checkForCompleteChain(currentNodeId: string): boolean {
+    const outgoingPhases = getOutgoers({id: currentNodeId}, nodes, edges)
+      .filter(node => ["end", "phase"].includes(node.type!));
+
+    if (outgoingPhases.length === 0) return false;
+    if (outgoingPhases.some(node => node.type === "end" )) return true;
+
+    const next = outgoingPhases.map(node => checkForCompleteChain(node.id))
+      .find(result => result);
+    console.log(next);
+    return !!next;
+  }
+
+  return checkForCompleteChain('start');
+};
 
 
 /**