88 lines
1.8 KiB
JavaScript
88 lines
1.8 KiB
JavaScript
import RES from './resource'
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const MAX_STACK_SIZE = 999
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const ItemRegistry = new (class ItemRegistry {
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constructor () {
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this.items = {}
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}
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register (name, item) {
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this.items[name] = item
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}
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get (name) {
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return this.items[name]
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}
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})()
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class Item {
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constructor (name, img, description) {
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this.name = name
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this._img = img
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this.description = description
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ItemRegistry.register(name, this)
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}
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get image () {
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return RES.loadImage(this._img, true)
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}
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}
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class ItemPlaceable extends Item {
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constructor (tile, name, img, description) {
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super(name, img, description)
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this.placeable = tile
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}
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}
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class ItemStack {
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static fromIString (str) {
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if (typeof str !== 'string') return
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let strpl = str.split(' ')
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let iname = strpl[0]
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let count = strpl[1]
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let item = ItemRegistry.get(iname)
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let istack = new ItemStack()
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istack.item = item
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istack.count = count || 1
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return istack
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}
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static new (itemdef, count = 1, metadata) {
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if (itemdef instanceof ItemStack) return itemdef.copy()
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if (typeof itemdef === 'string') return ItemStack.fromIString(itemdef)
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if (!(itemdef instanceof Item)) throw new Error('Invalid Item Definition!')
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let istack = new ItemStack()
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istack.item = itemdef
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istack.count = count
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istack.metadata = metadata
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return istack
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}
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copy () {
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return ItemStack.new(this.item, this.count, this.metadata)
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}
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get name () {
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return this.item ? this.item.name : ''
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}
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isEmpty () {
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return this.item === null || this.count === 0
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}
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takeItem (c) {
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let a = this.copy()
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if (c > this.count) {
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this.count = 0
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return a
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}
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this.count -= c
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a.count = c
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return a
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}
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}
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export { Item, ItemPlaceable, ItemStack, ItemRegistry, MAX_STACK_SIZE }
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