fix(block-name): updating block name should update downstream var refs

apps/sim/app/workspace/[workspaceId]/w/[workflowId]/components/panel/components/editor/editor.tsx

@@ -134,7 +134,11 @@ export function Editor() {
 
     const trimmedName = editedName.trim()
     if (trimmedName && trimmedName !== currentBlock?.name) {
-      collaborativeUpdateBlockName(currentBlockId, trimmedName)
+      const result = collaborativeUpdateBlockName(currentBlockId, trimmedName)
+      if (!result.success) {
+        // Keep rename mode open on error so user can correct the name
+        return
+      }
     }
     setIsRenaming(false)
   }, [currentBlockId, isRenaming, editedName, currentBlock?.name, collaborativeUpdateBlockName])

apps/sim/hooks/use-collaborative-workflow.ts

@@ -8,14 +8,15 @@ import { TriggerUtils } from '@/lib/workflows/triggers/triggers'
 import { useSocket } from '@/app/workspace/providers/socket-provider'
 import { getBlock } from '@/blocks'
 import { useUndoRedo } from '@/hooks/use-undo-redo'
+import { useNotificationStore } from '@/stores/notifications'
 import { registerEmitFunctions, useOperationQueue } from '@/stores/operation-queue/store'
 import { usePanelEditorStore } from '@/stores/panel/editor/store'
 import { useVariablesStore } from '@/stores/panel/variables/store'
 import { useUndoRedoStore } from '@/stores/undo-redo'
 import { useWorkflowDiffStore } from '@/stores/workflow-diff/store'
 import { useWorkflowRegistry } from '@/stores/workflows/registry/store'
 import { useSubBlockStore } from '@/stores/workflows/subblock/store'
-import { getUniqueBlockName, mergeSubblockState } from '@/stores/workflows/utils'
+import { getUniqueBlockName, mergeSubblockState, normalizeName } from '@/stores/workflows/utils'
 import { useWorkflowStore } from '@/stores/workflows/workflow/store'
 import type { BlockState, Position } from '@/stores/workflows/workflow/types'
 
@@ -1016,14 +1017,43 @@ export function useCollaborativeWorkflow() {
   )
 
   const collaborativeUpdateBlockName = useCallback(
-    (id: string, name: string) => {
-      executeQueuedOperation('update-name', 'block', { id, name }, () => {
-        const result = workflowStore.updateBlockName(id, name)
+    (id: string, name: string): { success: boolean; error?: string } => {
+      const trimmedName = name.trim()
+      const normalizedNewName = normalizeName(trimmedName)
+
+      if (!normalizedNewName) {
+        logger.error('Cannot rename block to empty name')
+        useNotificationStore.getState().addNotification({
+          level: 'error',
+          message: 'Block name cannot be empty',
+          workflowId: activeWorkflowId || undefined,
+        })
+        return { success: false, error: 'Block name cannot be empty' }
+      }
+
+      const currentBlocks = workflowStore.blocks
+      const conflictingBlock = Object.entries(currentBlocks).find(
+        ([blockId, block]) => blockId !== id && normalizeName(block.name) === normalizedNewName
+      )
+
+      if (conflictingBlock) {
+        const conflictName = conflictingBlock[1].name
+        logger.error(`Cannot rename block to "${trimmedName}" - conflicts with "${conflictName}"`)
+        useNotificationStore.getState().addNotification({
+          level: 'error',
+          message: `Block name "${trimmedName}" already exists`,
+          workflowId: activeWorkflowId || undefined,
+        })
+        return { success: false, error: `Block name "${trimmedName}" already exists` }
+      }
+
+      executeQueuedOperation('update-name', 'block', { id, name: trimmedName }, () => {
+        const result = workflowStore.updateBlockName(id, trimmedName)
 
         if (result.success && result.changedSubblocks.length > 0) {
           logger.info('Emitting cascaded subblock updates from block rename', {
             blockId: id,
-            newName: name,
+            newName: trimmedName,
             updateCount: result.changedSubblocks.length,
           })
 
@@ -1043,7 +1073,7 @@ export function useCollaborativeWorkflow() {
                 operation: {
                   operation: 'subblock-update',
                   target: 'subblock',
-                  payload: { blockId, subBlockId, value: newValue },
+                  payload: { blockId, subblockId: subBlockId, value: newValue },
                 },
                 workflowId: activeWorkflowId || '',
                 userId: session?.user?.id || 'unknown',
@@ -1052,6 +1082,8 @@ export function useCollaborativeWorkflow() {
           )
         }
       })
+
+      return { success: true }
     },
     [executeQueuedOperation, workflowStore, addToQueue, activeWorkflowId, session?.user?.id]
   )

apps/sim/stores/workflows/workflow/store.ts

@@ -716,54 +716,62 @@ export const useWorkflowStore = create<WorkflowStore>()(
           const workflowValues = subBlockStore.workflowValues[activeWorkflowId] || {}
           const updatedWorkflowValues = { ...workflowValues }
 
+          // Helper function to recursively update references in any data structure
+          function updateReferences(value: any, regex: RegExp, replacement: string): any {
+            // Handle string values
+            if (typeof value === 'string') {
+              return regex.test(value) ? value.replace(regex, replacement) : value
+            }
+
+            // Handle arrays
+            if (Array.isArray(value)) {
+              return value.map((item) => updateReferences(item, regex, replacement))
+            }
+
+            // Handle objects
+            if (value !== null && typeof value === 'object') {
+              const result = { ...value }
+              for (const key in result) {
+                result[key] = updateReferences(result[key], regex, replacement)
+              }
+              return result
+            }
+
+            // Return unchanged for other types
+            return value
+          }
+
+          const oldBlockName = normalizeName(oldBlock.name)
+          const newBlockName = normalizeName(name)
+          const regex = new RegExp(`<${oldBlockName}\\.`, 'g')
+
           // Loop through blocks
           Object.entries(workflowValues).forEach(([blockId, blockValues]) => {
             if (blockId === id) return // Skip the block being renamed
 
+            let blockHasChanges = false
+            const updatedBlockValues = { ...blockValues }
+
             // Loop through subblocks and update references
             Object.entries(blockValues).forEach(([subBlockId, value]) => {
-              const oldBlockName = normalizeName(oldBlock.name)
-              const newBlockName = normalizeName(name)
-              const regex = new RegExp(`<${oldBlockName}\\.`, 'g')
-
               // Use a recursive function to handle all object types
               const updatedValue = updateReferences(value, regex, `<${newBlockName}.`)
 
               // Check if the value actually changed
               if (JSON.stringify(updatedValue) !== JSON.stringify(value)) {
-                updatedWorkflowValues[blockId][subBlockId] = updatedValue
+                updatedBlockValues[subBlockId] = updatedValue
+                blockHasChanges = true
                 changedSubblocks.push({
                   blockId,
                   subBlockId,
                   newValue: updatedValue,
                 })
               }
-
-              // Helper function to recursively update references in any data structure
-              function updateReferences(value: any, regex: RegExp, replacement: string): any {
-                // Handle string values
-                if (typeof value === 'string') {
-                  return regex.test(value) ? value.replace(regex, replacement) : value
-                }
-
-                // Handle arrays
-                if (Array.isArray(value)) {
-                  return value.map((item) => updateReferences(item, regex, replacement))
-                }
-
-                // Handle objects
-                if (value !== null && typeof value === 'object') {
-                  const result = { ...value }
-                  for (const key in result) {
-                    result[key] = updateReferences(result[key], regex, replacement)
-                  }
-                  return result
-                }
-
-                // Return unchanged for other types
-                return value
-              }
             })
+
+            if (blockHasChanges) {
+              updatedWorkflowValues[blockId] = updatedBlockValues
+            }
           })
 
           // Update the subblock store with the new values