dstpabuaran.com/resources/js/lib/purchase-draft.ts

const DRAFT_PREFIX = 'purchase-draft';

export type PurchaseDraftData = {
    name: string;
    unit: string;
    supplierId: string;
    discount: number;
    shippingCost: number;
    notes: string;
    variants: Array<{
        variant: string;
        price: number;
        stock: number;
        photo?: string;
    }>;
    mode?: 'new' | 'existing';
    selectedMaterialName?: string;
    quantities?: Record<string, number>;
    photo?: string;
};

function getKey(type: 'create' | 'edit', userId?: number): string {
    if (type === 'edit') {
        return `${DRAFT_PREFIX}-edit-${userId ?? 'anon'}`;
    }

    return `${DRAFT_PREFIX}-create-${userId ?? 'anon'}`;
}

export function savePurchaseDraft(
    type: 'create' | 'edit',
    data: PurchaseDraftData,
    userId?: number,
): boolean {
    if (type !== 'create') {
        return false;
    }

    try {
        const key = getKey(type, userId);
        localStorage.setItem(key, JSON.stringify(data));

        return true;
    } catch {
        return false;
    }
}

export function loadPurchaseDraft(
    type: 'create' | 'edit',
    userId?: number,
): PurchaseDraftData | null {
    try {
        const key = getKey(type, userId);
        const raw = localStorage.getItem(key);

        if (!raw) {
            return null;
        }

        return JSON.parse(raw) as PurchaseDraftData;

    } catch {
        return null;
    }
}

export function clearPurchaseDraft(
    type: 'create' | 'edit',
    userId?: number,
): void {
    try {
        const key = getKey(type, userId);
        localStorage.removeItem(key);
    } catch {
        // ignore
    }
}