Using inventory items

1 files changed, 52 insertions, 4 deletions

diff --git a/src/ui.c b/src/ui.c
index e071036..cca77cf 100644
--- a/src/ui.c
+++ b/src/ui.c
@@ -280,6 +280,36 @@ void addItemToInventory(Inventory* inventory, InventoryItem item)
   }
 }
 
+void removeInventoryItem(Inventory* inventory, int itemIndex)
+{
+  // Out of bounds.
+  if (itemIndex < 0 || itemIndex >= inventory->itemCount)
+  {
+    return;
+  }
+
+  // Decrease count.
+  InventoryItem* item = &inventory->items[itemIndex];
+  --item->count;
+
+  // Remove item if no more.
+  if (item->count <= 0)
+  {
+    for (int index = itemIndex; index < inventory->itemCount - 1; ++index)
+    {
+      inventory->items[index] = inventory->items[index + 1];
+    }
+
+    --inventory->itemCount;
+
+    // Might prevent a future bug or something :D
+    if (inventory->itemCount < 0)
+    {
+      inventory->itemCount = 0;
+    }
+  }
+}
+
 void updateInventory(Inventory* inventory, Game* game)
 {
   if (IsWindowResized())
@@ -346,6 +376,8 @@ void updateInventory(Inventory* inventory, Game* game)
 
   int row = 0;
   int column = 0;
+  bool killItem = false;
+  int killIndex = 0;
 
   // Draw items.
   for (int index = 0; index < inventory->itemCount; ++index)
@@ -353,11 +385,22 @@ void updateInventory(Inventory* inventory, Game* game)
     InventoryItem* item = &inventory->items[index];
     Color color = WHITE;
 
-    // Make it blink when selected.
-    if (mouseIsSelecting && row == mouseRow && column == mouseColumn &&
-        (int)(GetTime() / game->settings.inventoryItemBlinkSpeed) % 2 == 0)
+    // Item Is selected.
+    if (mouseIsSelecting && row == mouseRow && column == mouseColumn)
     {
-      color = item->blinkColor;
+      // Make it blink when selected.
+      if ((int)(GetTime() / game->settings.inventoryItemBlinkSpeed) % 2 == 0)
+      {
+        color = item->blinkColor;
+      }
+
+      // Use item.
+      if (IsMouseButtonPressed(MOUSE_LEFT_BUTTON))
+      {
+        killItem = interactWithEntity(item->parent, game, SELECTION_USE) ==
+          INTERACTION_KILL_ITEM;
+        killIndex = index;
+      }
     }
 
     DrawTextureEx(game->assets.textures[item->textureId], (Vector2){x, y}, 0.0,
@@ -380,4 +423,9 @@ void updateInventory(Inventory* inventory, Game* game)
       column = 0;
     }
   }
+
+  if (killItem)
+  {
+    removeInventoryItem(inventory, killIndex);
+  }
 }