const std = @import("std");
const json_utils = @import("../json_utils.zig");
const Store = @import("../store.zig");
const json = std.json;

const ItemQuantity = @This();

id: Store.CodeId,
quantity: u64,

pub fn init(id: Store.CodeId, quantity: u64) ItemQuantity {
    return ItemQuantity{
        .id = id,
        .quantity = quantity
    };
}

pub fn parse(store: *Store, slot_obj: json.ObjectMap) !?ItemQuantity {
    const code = try json_utils.getStringRequired(slot_obj, "code");
    if (code.len == 0) return null;

    const quantity = try json_utils.getIntegerRequired(slot_obj, "quantity");
    if (quantity < 0) return error.InvalidQuantity;

    return ItemQuantity{
        .id = try store.getCodeId(code),
        .quantity = @intCast(quantity),
    };
}