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import { type ReactNode, createContext, useContext, useMemo, useState } from 'react'
import { type StoreApi, create } from 'zustand'
import { type TemporalState, temporal } from 'zundo'
import isDeepEqual from 'fast-deep-equal'
import type { Edge, Node } from './types'
import type { WorkflowHistoryEvent } from './hooks'
export const WorkflowHistoryStoreContext = createContext<WorkflowHistoryStoreContextType>({ store: null, shortcutsEnabled: true, setShortcutsEnabled: () => {} })
export const Provider = WorkflowHistoryStoreContext.Provider
export function WorkflowHistoryProvider({
nodes,
edges,
children,
}: WorkflowWithHistoryProviderProps) {
const [shortcutsEnabled, setShortcutsEnabled] = useState(true)
const [store] = useState(() =>
createStore({
nodes,
edges,
}),
)
const contextValue = {
store,
shortcutsEnabled,
setShortcutsEnabled,
}
return (
<Provider value={contextValue}>
{children}
</Provider>
)
}
export function useWorkflowHistoryStore() {
const {
store,
shortcutsEnabled,
setShortcutsEnabled,
} = useContext(WorkflowHistoryStoreContext)
if (store === null)
throw new Error('useWorkflowHistoryStoreApi must be used within a WorkflowHistoryProvider')
return {
store: useMemo(
() => ({
getState: store.getState,
setState: (state: WorkflowHistoryState) => {
store.setState({
workflowHistoryEvent: state.workflowHistoryEvent,
nodes: state.nodes.map((node: Node) => ({ ...node, data: { ...node.data, selected: false } })),
edges: state.edges.map((edge: Edge) => ({ ...edge, selected: false }) as Edge),
})
},
subscribe: store.subscribe,
temporal: store.temporal,
}),
[store],
),
shortcutsEnabled,
setShortcutsEnabled,
}
}
function createStore({
nodes: storeNodes,
edges: storeEdges,
}: {
nodes: Node[]
edges: Edge[]
}): WorkflowHistoryStoreApi {
const store = create(temporal<WorkflowHistoryState>(
(set, get) => {
return {
workflowHistoryEvent: undefined,
nodes: storeNodes,
edges: storeEdges,
getNodes: () => get().nodes,
setNodes: (nodes: Node[]) => set({ nodes }),
setEdges: (edges: Edge[]) => set({ edges }),
}
},
{
equality: (pastState, currentState) =>
isDeepEqual(pastState, currentState),
},
),
)
return store
}
export type WorkflowHistoryStore = {
nodes: Node[]
edges: Edge[]
workflowHistoryEvent: WorkflowHistoryEvent | undefined
}
export type WorkflowHistoryActions = {
setNodes?: (nodes: Node[]) => void
setEdges?: (edges: Edge[]) => void
}
export type WorkflowHistoryState = WorkflowHistoryStore & WorkflowHistoryActions
type WorkflowHistoryStoreContextType = {
store: ReturnType<typeof createStore> | null
shortcutsEnabled: boolean
setShortcutsEnabled: (enabled: boolean) => void
}
export type WorkflowHistoryStoreApi = StoreApi<WorkflowHistoryState> & { temporal: StoreApi<TemporalState<WorkflowHistoryState>> }
export type WorkflowWithHistoryProviderProps = {
nodes: Node[]
edges: Edge[]
children: ReactNode
}
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