core/src/ru/deadsoftware/cavedroid/game/mobs/player/Inventory.kt

   1 package ru.deadsoftware.cavedroid.game.mobs.player
   2
   3 import ru.deadsoftware.cavedroid.game.GameItemsHolder
   4 import ru.deadsoftware.cavedroid.game.model.item.InventoryItem
   5 import ru.deadsoftware.cavedroid.game.model.item.Item
   6 import ru.deadsoftware.cavedroid.game.objects.Drop
   7 import java.io.Serializable
   8
   9 class Inventory(
  10     val size: Int,
  11     val hotbarSize: Int,
  12     gameItemsHolder: GameItemsHolder
  13 ) : Serializable {
  14
  15     @Transient
  16     private lateinit var fallbackItem: InventoryItem
  17
  18     init {
  19         fallbackItem = gameItemsHolder.fallbackItem.toInventoryItem()
  20         if (size < 0 || hotbarSize < 0 || hotbarSize > size) {
  21             throw IllegalArgumentException("Invalid inventory sizes: hotbarSize=$hotbarSize; size=$size")
  22         }
  23     }
  24
  25     private val _items = Array(size) { InventoryItem(gameItemsHolder.fallbackItem) }
  26
  27     val items get() = _items.asList() as MutableList<InventoryItem>
  28
  29     val hotbarItems get() = items.subList(0, hotbarSize)
  30
  31     var activeSlot = 0
  32         set(value) {
  33             if (value in 0 ..< hotbarSize) {
  34                 field = value
  35             }
  36         }
  37
  38     val activeItem get() = items[activeSlot]
  39
  40     fun initItems(gameItemsHolder: GameItemsHolder) {
  41         fallbackItem = gameItemsHolder.fallbackItem.toInventoryItem()
  42         items.forEach { item ->
  43             item.init(gameItemsHolder)
  44         }
  45     }
  46
  47     private fun getItemPickSlot(item: Item): Int {
  48         for (i in items.indices) {
  49             val inventoryItem = items[i]
  50
  51             if (item == inventoryItem.item && inventoryItem.canBeAdded()) {
  52                 return i
  53             }
  54
  55             if (inventoryItem.item.isNone()) {
  56                 return i
  57             }
  58         }
  59
  60         return -1
  61     }
  62
  63     fun canPickItem(item: Item): Boolean {
  64         return getItemPickSlot(item) >= 0
  65     }
  66
  67     fun pickDrop(drop: Drop) {
  68         val slot = getItemPickSlot(drop.item).takeIf { it >= 0 } ?: return
  69         val inventoryItem = items[slot]
  70
  71         if (inventoryItem.item == drop.item) {
  72             inventoryItem.add()
  73             drop.pickedUp = true
  74         } else {
  75             _items[slot] = drop.item.toInventoryItem()
  76             drop.pickedUp = true
  77         }
  78     }
  79
  80     fun addItem(item: Item) {
  81         _items.copyInto(
  82             destination = _items,
  83             destinationOffset = 1,
  84             startIndex = 0,
  85             endIndex = size - 1
  86         )
  87
  88         _items[0] = item.toInventoryItem(item.params.maxStack)
  89     }
  90
  91     @JvmOverloads
  92     fun decreaseCurrentItemAmount(count: Int = 1) {
  93         activeItem.subtract(count)
  94         if (activeItem.amount <= 0) {
  95             _items[activeSlot] = fallbackItem
  96         }
  97     }
  98 }