Inventory

using UnityEngine;
using System.Collections;

[AddComponentMenu ("Inventory/Inventory")]
public class Inventory : MonoBehaviour {

    //This is the central piece of the Inventory System.
    public Transform[] Contents; //The content of the Inventory
    public int MaxContent = 12; //The maximum number of items the Player can carry.

    bool DebugMode = false; //If this is turned on the Inventory script will output the base of what it's doing to the Console window.

    private InventoryDisplay playersInvDisplay; //Keep track of the InventoryDisplay script.

    public Transform itemHolderObject; //The object the unactive items are going to be parented to. In most cases this is going to be the Inventory object itself.

    //Handle components and assign the itemHolderObject.
    void Awake ()
    {
        itemHolderObject = gameObject.transform;

        playersInvDisplay = GetComponent<InventoryDisplay>();
        if (playersInvDisplay == null)
        {
            Debug.LogError("No Inventory Display script was found on " + transform.name + " but an Inventory script was.");
            Debug.LogError("Unless a Inventory Display script is added the Inventory won't show. Add it to the same gameobject as the Inventory for maximum performance");
        }
    }

    //Add an item to the inventory.
    public void AddItem(Transform Item)
    {
        ArrayList newContents = new ArrayList(Contents);
        newContents.Add(Item);
        newContents.CopyTo(Contents); //Array to unity builtin array

        if (DebugMode)
        {
            Debug.Log(Item.name+" has been added to inventroy");
        }

        //Tell the InventoryDisplay to update the list.
        if (playersInvDisplay != null)
        {
            playersInvDisplay.UpdateInventoryList();
        }
    }

    //Removed an item from the inventory (IT DOESN'T DROP IT).
    public void RemoveItem(Transform Item)
    {
        ArrayList newContents = new ArrayList();
        int index = 0;
        bool shouldend = false;
        foreach(Transform i in newContents) //Loop through the Items in the Inventory:
        {
            if(i == Item) //When a match is found, remove the Item.
            {
                newContents.RemoveAt(index);
                shouldend=true;
                //No need to continue running through the loop since we found our item.
            }
            index++;

            if(shouldend) //Exit the loop
            {
                Contents=newContents.ToArray(typeof (Transform)) as Transform[];
                if (DebugMode)
                {
                    Debug.Log(Item.name+" has been removed from inventroy");
                }
                if (playersInvDisplay != null)
                {
                    playersInvDisplay.UpdateInventoryList();
                }
                return;
            }
        }
    }

    //Dropping an Item from the Inventory
    public void DropItem(Item item)
    {
        gameObject.SendMessage ("PlayDropItemSound", SendMessageOptions.DontRequireReceiver); //Play sound

        bool makeDuplicate = false;
        if (item.stack == 1) //Drop item
        {
            RemoveItem(item.transform);
        }
        else //Drop from stack
        {
            item.stack -= 1;
            makeDuplicate = true;
        }

        item.DropMeFromThePlayer(makeDuplicate); //Calling the drop function + telling it if the object is stacked or not.

        if (DebugMode)
        {
            Debug.Log(item.name + " has been dropped");
        }
    }

    //This will tell you everything that is in the inventory.
    void DebugInfo()
    {
        Debug.Log("Inventory Debug - Contents");
        int items = 0;
        foreach(Transform i in Contents){
            items++;
            Debug.Log(i.name);
        }
        Debug.Log("Inventory contains "+items+" Item(s)");
    }

    //Drawing an 'S' in the scene view on top of the object the Inventory is attached to stay organized.
    void OnDrawGizmos ()
    {
        Gizmos.DrawIcon (new Vector3(transform.position.x, transform.position.y + 2.3f, transform.position.z), "InventoryGizmo.png", true);
    }
}