JS to TS : simulator/src/data/undo.ts (CircuitVerse#421)

* add

* remove

* fix null

* resolve 2

* reslove cognitive complexity

---------

Co-authored-by: Arnabdaz <[email protected]>

src/simulator/src/data/undo.ts

@@ -0,0 +1,82 @@
+/* eslint-disable import/no-cycle */
+import { layoutModeGet } from '../layoutMode'
+import Scope, { scopeList } from '../circuit'
+import { loadScope } from './load'
+import { updateRestrictedElementsInScope } from '../restrictedElementDiv'
+import { forceResetNodesSet } from '../engine'
+
+// Declare global variables
+declare let globalScope: Scope
+declare let loading: boolean
+
+/**
+ * Function to restore copy from backup
+ * @param scope - The circuit on which undo is called
+ * @category data
+ */
+export default function undo(scope: Scope = globalScope): void {
+    if (layoutModeGet() || scope.backups.length < 2) return
+
+    const { ox, oy, scale } = saveGlobalScopePosition()
+    resetGlobalScopePosition()
+
+    loading = true
+    const undoData = popLastBackup(scope)
+    if (!undoData) return
+
+    scope.history.push(undoData)
+
+    const tempScope = createTempScope(scope)
+    if (!tempScope) return
+
+    updateGlobalScope(tempScope, ox, oy, scale)
+    forceResetNodesSet(true)
+    updateRestrictedElementsInScope()
+}
+
+function saveGlobalScopePosition() {
+    return {
+        ox: globalScope.ox,
+        oy: globalScope.oy,
+        scale: globalScope.scale,
+    }
+}
+
+function resetGlobalScopePosition() {
+    globalScope.ox = 0
+    globalScope.oy = 0
+}
+
+function popLastBackup(scope: Scope): string | undefined {
+    return scope.backups.pop()
+}
+
+function createTempScope(scope: Scope): Scope | undefined {
+    const tempScope = new Scope(scope.name)
+    if (scope.backups.length === 0) return tempScope
+
+    try {
+        loadScope(tempScope, JSON.parse(scope.backups[scope.backups.length - 1]))
+    } catch (error) {
+        console.error('Failed to parse backup data:', error)
+        loading = false
+        return undefined
+    }
+
+    tempScope.backups = scope.backups
+    tempScope.history = scope.history
+    tempScope.id = scope.id
+    tempScope.name = scope.name
+    tempScope.testbenchData = scope.testbenchData
+
+    return tempScope
+}
+
+function updateGlobalScope(tempScope: Scope, ox: number, oy: number, scale: number) {
+    scopeList[tempScope.id] = tempScope
+    globalScope = tempScope
+    globalScope.ox = ox
+    globalScope.oy = oy
+    globalScope.scale = scale
+    loading = false
+}