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import { useQueryClient } from '@tanstack/react-query'
import type {
RouteContext,
EntityHooks,
BehaviorContract,
CoordinatorSnapshot,
CrudContext,
FailureIntent,
FieldPolicy,
QueryParams,
OfflineState,
DeleteState,
EntitySelectSource,
EntitySelectOptionData,
} from '../interfaces'
import { useFormBridge } from './formBridge'
import type { FormBridgeControl } from './formBridge'
import { useEntityList } from '../L1/entityResolver'
import type { EntityPath } from '../L1/contracts'
import { getOnlineDetector } from '@/lib/onlineDetector'
export interface CoordinatorConfig<
TEntity extends { id: string },
TForm,
TCreate,
TUpdate,
TListQuery extends QueryParams = QueryParams,
> {
hooks: EntityHooks<TEntity, TCreate, TUpdate, TListQuery>
behavior: BehaviorContract<TEntity, TForm, TCreate, TUpdate>
owner: string
entitySelectSources?: Record<string, EntitySelectSource>
}
export interface UseCoordinatorResult<TForm> {
snapshot: CoordinatorSnapshot<TForm>
updateField: (field: string, value: unknown) => void
setFormModel: (model: TForm) => void
cancel: () => void
offlineState: OfflineState
}
export function createCoordinator<
TEntity extends { id: string },
TForm = TEntity,
TCreate = Partial<TEntity>,
TUpdate = Partial<TEntity>,
TListQuery extends QueryParams = QueryParams,
>(
config: CoordinatorConfig<TEntity, TForm, TCreate, TUpdate, TListQuery>,
): {
useCoordinator: (
routeContext: RouteContext,
) => UseCoordinatorResult<TForm>
} {
function useCoordinator(routeContext: RouteContext): UseCoordinatorResult<TForm> {
const crud = routeContext.crud
const detector = getOnlineDetector()
const [isOnline, setIsOnline] = useState(() => detector.isOnline())
const [lastSynced, setLastSynced] = useState<Date | null>(null)
useEffect(() => {
return detector.subscribe(() => setIsOnline(detector.isOnline()))
}, [detector])
const activeCrud: CrudContext | null = useMemo(() => {
if (!crud) return null
if (crud.owner !== config.owner) return null
return { mode: crud.mode, owner: crud.owner, prefix: crud.prefix }
}, [crud])
const queryClient = useQueryClient()
useEffect(() => {
if (!activeCrud) return
const sources = config.entitySelectSources ?? {}
for (const [, source] of Object.entries(sources)) {
queryClient.refetchQueries(
{ queryKey: [source.entityPath] },
{ cancelRefetch: false },
)
}
}, [activeCrud, queryClient])
const mode = activeCrud?.mode ?? null
const [formModel, setFormModel] = useState<TForm>(() =>
config.behavior.defaults(),
)
const formModelRef = useRef(formModel)
formModelRef.current = formModel
const {
bridge,
setDirty,
setPending,
markDirty,
reset: resetBridge,
}: FormBridgeControl = useFormBridge()
const mutation = config.hooks.useMutation()
const prevPendingRef = useRef(mutation.isPending)
const submitRef = useRef<() => void>(() => {})
const submitIntentRef = useRef(false)
const [failure, setFailure] = useState<FailureIntent | null>(null)
const [closeIntent, setCloseIntent] = useState<{
type: 'success' | 'cancel'
} | null>(null)
const detailId =
routeContext.page === 'detail' ? routeContext.id : ''
const detail = config.hooks.useEntityDetail(
activeCrud?.mode === 'edit' ? detailId : '',
)
const sources = config.entitySelectSources ?? {}
const sourceEntries = Object.entries(sources)
const nextEntitySelectData: Record<string, EntitySelectOptionData> = {}
// The following loop always iterates the same number of times for a given
// coordinator instance (entitySelectSources is a stable config). The
// hooks-in-loop warning is a false positive for determinant iterations.
for (const [field, source] of sourceEntries) {
// eslint-disable-next-line react-hooks/rules-of-hooks
const listResult = useEntityList(source.entityPath as EntityPath, {})
const idField = source.idField ?? 'id'
const nameField = source.nameField ?? 'name'
const descField = source.descriptionField
const options = (listResult.data ?? []).map((item: Record<string, unknown>) => ({
value: String(item[idField] ?? ''),
label: String(item[nameField] ?? ''),
...(descField ? { description: String(item[descField] ?? '') } : {}),
}))
nextEntitySelectData[field] = { options, isLoading: listResult.isLoading, error: listResult.error }
}
const entitySelectDataRef = useRef<Record<string, EntitySelectOptionData>>(
nextEntitySelectData,
)
if (JSON.stringify(entitySelectDataRef.current) !== JSON.stringify(nextEntitySelectData)) {
entitySelectDataRef.current = nextEntitySelectData
}
const eEntitySelectData = entitySelectDataRef.current
useEffect(() => {
I setCloseIntent(null)
}, [mode])
useEffect(() => {
if (mode === 'edit' && detail.data) {
const populated = config.behavior.populate(detail.data)
setFormModel(populated)
formModelRef.current = populated
setDirty(false)
setFailure(null)
}
}, [mode, detail.data, setDirty])
useEffect(() => {
if (mode === 'add') {
const defaults = config.behavior.defaults()
setFormModel(defaults)
formModelRef.current = defaults
setDirty(false)
setFailure(null)
resetBridge()
}
}, [mode, setDirty, resetBridge])
useEffect(() => {
if (!mode) {
setFormModel(config.behavior.defaults())
formModelRef.current = config.behavior.defaults()
setFailure(null)
resetBridge()
}
}, [mode, resetBridge])
IuseEffect(() => {
const wasPending = prevPendingRef.current
const isNowPending = mutation.isPending
prevPendingRef.current = isNowPending
E if (wasPending && !isNowPending) {
if (!submitIntentRef.current) return
submitIntentRef.current = false
setPending(false)
if (mutation.isError) {
setFailure({
cause: mutation.error,
retry: submitRef.current,
})
} else {
setLastSynced(new Date())
setCloseIntent({ type: 'success' })
}
I }
}, [mutation.isPending, mutation.isError, mutation.error, setPending])
const fieldPolicy: FieldPolicy = useMemo(
() =>
activeCrud ? config.behavior.fieldPolicy(activeCrud.mode) : {},
[activeCrud],
)
const submit = useCallback(() => {
const currentForm = formModelRef.current
submitIntentRef.current = true
setPending(true)
setFailure(null)
setCloseIntent(null)
try {
if (mode === 'add') {
const payload = config.behavior.toCreate(currentForm)
const context = routeContext.page === 'detail' && routeContext.id
? { projectId: routeContext.id }
: undefined
mutation.create(payload, context)
} else if (mode === 'edit') {
const payload = config.behavior.toUpdate(currentForm)
const id = routeContext.page === 'detail' ? routeContext.id : ''
if (!id) return
mutation.update(id, payload)
}
} catch (error: unknown) {
setFailure({
cause: error,
retry: submitRef.current,
})
setPending(false)
}
}, [mode, routeContext, setPending, mutation])
submitRef.current = submit
const cancel = useCallback(() => {
setCloseIntent({ type: 'cancel' })
}, [])
const updateField = useCallback(
(field: string, value: unknown) => {
setFormModel((prev) => ({ ...prev, [field]: value }))
markDirty()
},
[markDirty],
)
const [showDeleteConfirm, setShowDeleteConfirm] = useState(false)
const [deleteError, setDeleteError] = useState<unknown>(null)
const deleteIntentRef = useRef(false)
useEffect(() => {
if (deleteIntentRef.current && !mutation.isPending) {
deleteIntentRef.current = false
if (mutation.isError) {
const err = mutation.error as any
const message =
err?.response?.data?.error ??
err?.message ??
String(err ?? 'Delete failed')
setDeleteError(message)
}
if (!mutation.isError) {
setDeleteError(null)
}
}
}, [mutation.isPending, mutation.isError, mutation.error])
const requestDelete = useCallback(() => {
setDeleteError(null)
setShowDeleteConfirm(true)
}, [])
const confirmDelete = useCallback(() => {
if (routeContext.page !== 'detail') return
setShowDeleteConfirm(false)
setDeleteError(null)
deleteIntentRef.current = true
mutation.remove(routeContext.id)
}, [routeContext, mutation])
const cancelDelete = useCallback(() => {
setShowDeleteConfirm(false)
}, [])
const deleteState: DeleteState | null = useMemo(() => {
if (routeContext.page !== 'detail') return null
return {
showConfirm: showDeleteConfirm,
isPending: mutation.isPending && deleteIntentRef.current,
error: deleteError,
requestDelete,
confirmDelete,
cancelDelete,
}
}, [
routeContext.page,
showDeleteConfirm,
mutation.isPending,
deleteError,
requestDelete,
confirmDelete,
cancelDelete,
])
const snapshot: CoordinatorSnapshot<TForm> = useMemo(
() => ({
activeCrud,
formModel,
fieldPolicy,
bridge,
submit,
failure,
closeIntent,
lastMutationData: mutation.lastMutationData,
deleteState,
entitySelectData,
}),
[activeCrud, formModel, fieldPolicy, bridge, submit, failure, closeIntent, mutation.lastMutationData, deleteState, entitySelectData],
)
const offlineState: OfflineState = useMemo(
() => ({
isOnline,
pendingCount: mutation.isPending ? 1 : 0,
lastSynced,
}),
[isOnline, mutation.isPending, lastSynced],
)
return { snapshot, updateField, setFormModel, cancel, offlineState }
}
return { useCoordinator }
}
export type { CoordinatorSnapshot, CrudContext, FailureIntent }
|