fix(edge-validation): race condition on collaborative add

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

@@ -24,7 +24,7 @@ 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 { filterNewEdges, mergeSubblockState } from '@/stores/workflows/utils'
+import { filterNewEdges, filterValidEdges, mergeSubblockState } from '@/stores/workflows/utils'
 import { useWorkflowStore } from '@/stores/workflows/workflow/store'
 import type { BlockState, Loop, Parallel, Position } from '@/stores/workflows/workflow/types'
 
@@ -226,9 +226,12 @@ export function useCollaborativeWorkflow() {
             case EDGES_OPERATIONS.BATCH_ADD_EDGES: {
               const { edges } = payload
               if (Array.isArray(edges) && edges.length > 0) {
-                const newEdges = filterNewEdges(edges, useWorkflowStore.getState().edges)
+                const blocks = useWorkflowStore.getState().blocks
+                const currentEdges = useWorkflowStore.getState().edges
+                const validEdges = filterValidEdges(edges, blocks)
+                const newEdges = filterNewEdges(validEdges, currentEdges)
                 if (newEdges.length > 0) {
-                  useWorkflowStore.getState().batchAddEdges(newEdges)
+                  useWorkflowStore.getState().batchAddEdges(newEdges, { skipValidation: true })
                 }
               }
               break
@@ -1004,7 +1007,11 @@ export function useCollaborativeWorkflow() {
 
       if (edges.length === 0) return false
 
-      const newEdges = filterNewEdges(edges, useWorkflowStore.getState().edges)
+      // Filter out invalid edges (e.g., edges targeting trigger blocks) and duplicates
+      const blocks = useWorkflowStore.getState().blocks
+      const currentEdges = useWorkflowStore.getState().edges
+      const validEdges = filterValidEdges(edges, blocks)
+      const newEdges = filterNewEdges(validEdges, currentEdges)
       if (newEdges.length === 0) return false
 
       const operationId = crypto.randomUUID()
@@ -1020,7 +1027,7 @@ export function useCollaborativeWorkflow() {
         userId: session?.user?.id || 'unknown',
       })
 
-      useWorkflowStore.getState().batchAddEdges(newEdges)
+      useWorkflowStore.getState().batchAddEdges(newEdges, { skipValidation: true })
 
       if (!options?.skipUndoRedo) {
         newEdges.forEach((edge) => undoRedo.recordAddEdge(edge.id))
@@ -1484,9 +1491,23 @@ export function useCollaborativeWorkflow() {
 
       if (blocks.length === 0) return false
 
+      // Filter out invalid edges (e.g., edges targeting trigger blocks)
+      // Combine existing blocks with new blocks for validation
+      const existingBlocks = useWorkflowStore.getState().blocks
+      const newBlocksMap = blocks.reduce(
+        (acc, block) => {
+          acc[block.id] = block
+          return acc
+        },
+        {} as Record<string, BlockState>
+      )
+      const allBlocks = { ...existingBlocks, ...newBlocksMap }
+      const validEdges = filterValidEdges(edges, allBlocks)
+
       logger.info('Batch adding blocks collaboratively', {
         blockCount: blocks.length,
-        edgeCount: edges.length,
+        edgeCount: validEdges.length,
+        filteredEdges: edges.length - validEdges.length,
       })
 
       const operationId = crypto.randomUUID()
@@ -1496,16 +1517,18 @@ export function useCollaborativeWorkflow() {
         operation: {
           operation: BLOCKS_OPERATIONS.BATCH_ADD_BLOCKS,
           target: OPERATION_TARGETS.BLOCKS,
-          payload: { blocks, edges, loops, parallels, subBlockValues },
+          payload: { blocks, edges: validEdges, loops, parallels, subBlockValues },
         },
         workflowId: activeWorkflowId || '',
         userId: session?.user?.id || 'unknown',
       })
 
-      useWorkflowStore.getState().batchAddBlocks(blocks, edges, subBlockValues)
+      useWorkflowStore.getState().batchAddBlocks(blocks, validEdges, subBlockValues, {
+        skipEdgeValidation: true,
+      })
 
       if (!options?.skipUndoRedo) {
-        undoRedo.recordBatchAddBlocks(blocks, edges, subBlockValues)
+        undoRedo.recordBatchAddBlocks(blocks, validEdges, subBlockValues)
       }
 
       return true

apps/sim/stores/workflows/utils.ts

@@ -2,8 +2,9 @@ import type { Edge } from 'reactflow'
 import { v4 as uuidv4 } from 'uuid'
 import { getBlockOutputs } from '@/lib/workflows/blocks/block-outputs'
 import { mergeSubBlockValues, mergeSubblockStateWithValues } from '@/lib/workflows/subblocks'
+import { TriggerUtils } from '@/lib/workflows/triggers/triggers'
 import { getBlock } from '@/blocks'
-import { normalizeName } from '@/executor/constants'
+import { isAnnotationOnlyBlock, normalizeName } from '@/executor/constants'
 import { useSubBlockStore } from '@/stores/workflows/subblock/store'
 import type {
   BlockState,
@@ -17,6 +18,32 @@ import { TRIGGER_RUNTIME_SUBBLOCK_IDS } from '@/triggers/constants'
 
 const WEBHOOK_SUBBLOCK_FIELDS = ['webhookId', 'triggerPath']
 
+/**
+ * Checks if an edge is valid (source and target exist, not annotation-only, target is not a trigger)
+ */
+function isValidEdge(
+  edge: Edge,
+  blocks: Record<string, { type: string; triggerMode?: boolean }>
+): boolean {
+  const sourceBlock = blocks[edge.source]
+  const targetBlock = blocks[edge.target]
+  if (!sourceBlock || !targetBlock) return false
+  if (isAnnotationOnlyBlock(sourceBlock.type)) return false
+  if (isAnnotationOnlyBlock(targetBlock.type)) return false
+  if (TriggerUtils.isTriggerBlock(targetBlock)) return false
+  return true
+}
+
+/**
+ * Filters edges to only include valid ones (target exists and is not a trigger block)
+ */
+export function filterValidEdges(
+  edges: Edge[],
+  blocks: Record<string, { type: string; triggerMode?: boolean }>
+): Edge[] {
+  return edges.filter((edge) => isValidEdge(edge, blocks))
+}
+
 export function filterNewEdges(edgesToAdd: Edge[], currentEdges: Edge[]): Edge[] {
   return edgesToAdd.filter((edge) => {
     if (edge.source === edge.target) return false

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

@@ -4,13 +4,17 @@ import { create } from 'zustand'
 import { devtools } from 'zustand/middleware'
 import { DEFAULT_DUPLICATE_OFFSET } from '@/lib/workflows/autolayout/constants'
 import { getBlockOutputs } from '@/lib/workflows/blocks/block-outputs'
-import { TriggerUtils } from '@/lib/workflows/triggers/triggers'
 import { getBlock } from '@/blocks'
 import type { SubBlockConfig } from '@/blocks/types'
-import { isAnnotationOnlyBlock, normalizeName, RESERVED_BLOCK_NAMES } from '@/executor/constants'
+import { normalizeName, RESERVED_BLOCK_NAMES } from '@/executor/constants'
 import { useWorkflowRegistry } from '@/stores/workflows/registry/store'
 import { useSubBlockStore } from '@/stores/workflows/subblock/store'
-import { filterNewEdges, getUniqueBlockName, mergeSubblockState } from '@/stores/workflows/utils'
+import {
+  filterNewEdges,
+  filterValidEdges,
+  getUniqueBlockName,
+  mergeSubblockState,
+} from '@/stores/workflows/utils'
 import type {
   Position,
   SubBlockState,
@@ -91,26 +95,6 @@ function resolveInitialSubblockValue(config: SubBlockConfig): unknown {
   return null
 }
 
-function isValidEdge(
-  edge: Edge,
-  blocks: Record<string, { type: string; triggerMode?: boolean }>
-): boolean {
-  const sourceBlock = blocks[edge.source]
-  const targetBlock = blocks[edge.target]
-  if (!sourceBlock || !targetBlock) return false
-  if (isAnnotationOnlyBlock(sourceBlock.type)) return false
-  if (isAnnotationOnlyBlock(targetBlock.type)) return false
-  if (TriggerUtils.isTriggerBlock(targetBlock)) return false
-  return true
-}
-
-function filterValidEdges(
-  edges: Edge[],
-  blocks: Record<string, { type: string; triggerMode?: boolean }>
-): Edge[] {
-  return edges.filter((edge) => isValidEdge(edge, blocks))
-}
-
 const initialState = {
   blocks: {},
   edges: [],
@@ -356,7 +340,8 @@ export const useWorkflowStore = create<WorkflowStore>()(
           data?: Record<string, any>
         }>,
         edges?: Edge[],
-        subBlockValues?: Record<string, Record<string, unknown>>
+        subBlockValues?: Record<string, Record<string, unknown>>,
+        options?: { skipEdgeValidation?: boolean }
       ) => {
         const currentBlocks = get().blocks
         const currentEdges = get().edges
@@ -381,7 +366,10 @@ export const useWorkflowStore = create<WorkflowStore>()(
         }
 
         if (edges && edges.length > 0) {
-          const validEdges = filterValidEdges(edges, newBlocks)
+          // Skip validation if already validated by caller (e.g., collaborative layer)
+          const validEdges = options?.skipEdgeValidation
+            ? edges
+            : filterValidEdges(edges, newBlocks)
           const existingEdgeIds = new Set(currentEdges.map((e) => e.id))
           for (const edge of validEdges) {
             if (!existingEdgeIds.has(edge.id)) {
@@ -516,11 +504,12 @@ export const useWorkflowStore = create<WorkflowStore>()(
         get().updateLastSaved()
       },
 
-      batchAddEdges: (edges: Edge[]) => {
+      batchAddEdges: (edges: Edge[], options?: { skipValidation?: boolean }) => {
         const blocks = get().blocks
         const currentEdges = get().edges
 
-        const validEdges = filterValidEdges(edges, blocks)
+        // Skip validation if already validated by caller (e.g., collaborative layer)
+        const validEdges = options?.skipValidation ? edges : filterValidEdges(edges, blocks)
         const filtered = filterNewEdges(validEdges, currentEdges)
         const newEdges = [...currentEdges]
 

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

@@ -203,12 +203,13 @@ export interface WorkflowActions {
   batchAddBlocks: (
     blocks: BlockState[],
     edges?: Edge[],
-    subBlockValues?: Record<string, Record<string, unknown>>
+    subBlockValues?: Record<string, Record<string, unknown>>,
+    options?: { skipEdgeValidation?: boolean }
   ) => void
   batchRemoveBlocks: (ids: string[]) => void
   batchToggleEnabled: (ids: string[]) => void
   batchToggleHandles: (ids: string[]) => void
-  batchAddEdges: (edges: Edge[]) => void
+  batchAddEdges: (edges: Edge[], options?: { skipValidation?: boolean }) => void
   batchRemoveEdges: (ids: string[]) => void
   clear: () => Partial<WorkflowState>
   updateLastSaved: () => void