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* useItemForm - Orchestrator hook for create/edit item workflow
*
* @module dialogs/ItemFormDialog/useItemForm
* @description
* Manages all state, queries, and form handling for item creation/editing:
* supplier selection → item details → validation → API submission.
*
* Composes three specialized concerns:
* - State: supplier, form values, errors, controlled Autocomplete value
* - Queries: suppliers with 5-minute cache via useSuppliersQuery
* - Handlers: form submission with error mapping and demo mode support
*/
import * as React from 'react';
import { useForm, type Control, type UseFormStateReturn, type UseFormSetValue, type UseFormRegister, type UseFormSetError, type UseFormClearErrors, type UseFormWatch, type UseFormHandleSubmit } from 'react-hook-form';
import { zodResolver } from '@hookform/resolvers/zod';
import { useTranslation } from 'react-i18next';
import { useToast } from '../../../../context/toast';
import { upsertItem } from '../../../../api/inventory/mutations';
import { itemFormSchema, type UpsertItemForm } from '../../../../api/inventory/validation';
import type { UpsertItemRequest, InventoryRow } from '../../../../api/inventory';
import type { SupplierOption } from '../../../../api/analytics/types';
import { useSuppliersQuery } from '../../../../api/inventory/hooks/useInventoryData';
/**
* Complete item form state and handlers
*
* @interface UseItemFormReturn
*/
export interface UseItemFormReturn {
// State
supplierValue: SupplierOption | null;
formError: string | null;
// Setters
setSupplierValue: (supplier: SupplierOption | null) => void;
setFormError: (error: string | null) => void;
// Query
suppliers: SupplierOption[];
// Form methods
register: UseFormRegister<UpsertItemForm>;
control: Control<UpsertItemForm>;
formState: UseFormStateReturn<UpsertItemForm>;
setValue: UseFormSetValue<UpsertItemForm>;
setError: UseFormSetError<UpsertItemForm>;
clearErrors: UseFormClearErrors<UpsertItemForm>;
watch: UseFormWatch<UpsertItemForm>;
handleSubmit: UseFormHandleSubmit<UpsertItemForm>;
// Handlers
onSubmit: () => Promise<void>;
handleClose: () => void;
}
/**
* Orchestrator hook managing item form workflow
*
* @param params.isOpen - Whether dialog is currently open (controls query firing)
* @param params.initial - Initial item data for edit mode (undefined for create)
* @param params.onClose - Callback when dialog closes
* @param params.onSaved - Optional callback after successful save
* @param params.readOnly - Demo mode flag (disables submission)
* @returns Complete form state and handlers
*
* @enterprise
* - Smart supplier loading with 5-minute cache via useSuppliersQuery
* - Controlled Autocomplete to prevent UI/RHF desync
* - Intelligent error mapping: detects duplicate name/code and fields supplier issues
* - Form state resets on dialog open to ensure clean state
* - Supplier alignment effect handles race conditions when list loads late
*/
export function useItemForm({
isOpen,
initial,
onClose,
onSaved = () => {},
readOnly = false,
}: {
isOpen: boolean;
initial?: InventoryRow | null;
onClose: () => void;
onSaved?: () => void;
readOnly?: boolean;
}): UseItemFormReturn {
const { t } = useTranslation(['common', 'inventory', 'errors']);
const toast = useToast();
// ================================
// State Management
// ================================
const [supplierValue, setSupplierValue] = React.useState<SupplierOption | null>(null);
const [formError, setFormError] = React.useState<string | null>(null);
// ================================
// Data Query
// ================================
const { data: suppliers = [] } = useSuppliersQuery(isOpen);
// ================================
// Form Management
// ================================
const {
register,
control,
handleSubmit: rhfHandleSubmit,
formState,
reset,
setValue,
setError,
clearErrors,
watch,
} = useForm<UpsertItemForm>({
resolver: zodResolver(itemFormSchema),
defaultValues: {
name: initial?.name ?? '',
code: initial?.code ?? '',
supplierId: initial?.supplierId ?? '',
quantity: initial?.onHand ?? 0,
price: 0,
reason: 'INITIAL_STOCK',
},
});
// ================================
// Effects
// ================================
/**
* Align controlled Autocomplete with initial supplierId when suppliers load
* Prevents race condition where suppliers arrive after defaultValues set
*/
React.useEffect(() => {
if (!suppliers.length) return;
const match = suppliers.find((s) => String(s.id) === String(initial?.supplierId)) ?? null;
setSupplierValue(match);
}, [suppliers, initial?.supplierId]);
/**
* Reset form state when dialog opens with different initial data
* Ensures predictable state for Create vs Edit flows
*/
React.useEffect(() => {
if (!isOpen) return;
reset({
name: initial?.name ?? '',
code: initial?.code ?? '',
supplierId: (initial?.supplierId as UpsertItemForm['supplierId']) ?? '',
quantity: initial?.onHand ?? 0,
price: 0,
reason: 'INITIAL_STOCK',
});
setFormError(null);
clearErrors();
}, [isOpen, initial, reset, clearErrors]);
// ================================
// Handlers
// ================================
/**
* Convert generic backend error string into field or form errors
* Uses readable heuristics (duplicate name/code, supplier issues)
* Can be replaced by structured fieldErrors in future
*/
function applyServerError(message?: string | null): void {
if (!message) return;
const msg = message.toLowerCase();
// Heuristics for duplicates
if (msg.includes('name') && (msg.includes('duplicate') || msg.includes('exists'))) {
setError('name', {
message: t('errors:inventory.conflicts.duplicateName', 'An item with this name already exists.'),
});
setFormError(t('errors:inventory.validationFailed', 'Please fix the highlighted fields.'));
return;
}
if ((msg.includes('code') || msg.includes('sku')) && (msg.includes('duplicate') || msg.includes('exists'))) {
setError('code', {
message: t('errors:inventory.conflicts.duplicateCode', 'An item with this code already exists.'),
});
setFormError(t('errors:inventory.validationFailed', 'Please fix the highlighted fields.'));
return;
}
if (msg.includes('supplier')) {
setError('supplierId', { message });
setFormError(t('errors:inventory.validationFailed', 'Please fix the highlighted fields.'));
return;
}
// Generic fallback
setFormError(message || t('errors:inventory.server.serverError', 'Something went wrong. Please try again.'));
}
/**
* Submit form with validation and API call
*
* @enterprise
* - Honors readOnly (demo mode) flag
* - Maps form values to UpsertItemRequest (reason → notes, onHand → quantity)
* - Auto-sets minQty to 5 and createdBy to 'user'
* - Maps field-level and generic errors from backend
* - Triggers onSaved callback and closes on success
*/
const onSubmit = rhfHandleSubmit(async (values: UpsertItemForm) => {
setFormError(null);
clearErrors();
// Demo guard
if (readOnly) {
setFormError(t('common:demoDisabled', 'This action is disabled in demo mode.'));
return;
}
// Map form values to backend request shape
const requestData: UpsertItemRequest = {
name: values.name,
code: values.code,
supplierId: values.supplierId,
quantity: values.quantity,
price: values.price,
minQty: 5,
notes: values.reason,
createdBy: 'user',
};
const res = await upsertItem(requestData);
if (res.ok) {
toast(t('inventory:status.itemSaved', 'Item saved successfully!'), 'success');
onSaved();
handleClose();
} else {
applyServerError(res.error ?? t('errors:inventory.server.serverError', 'Something went wrong. Please try again.'));
}
});
/**
* Close dialog with complete state cleanup
* Prevents state pollution between sessions
*/
const handleClose = () => {
setSupplierValue(null);
setFormError(null);
reset();
onClose();
};
return {
supplierValue,
formError,
setSupplierValue,
setFormError,
suppliers,
register,
control,
formState,
setValue,
setError,
clearErrors,
watch,
handleSubmit: rhfHandleSubmit,
onSubmit,
handleClose,
};
}
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