001package net.minecraft.entity.item;
002
003import java.util.Iterator;
004
005import net.minecraftforge.common.MinecraftForge;
006import net.minecraftforge.event.Event.Result;
007import net.minecraftforge.event.entity.item.ItemExpireEvent;
008import net.minecraftforge.event.entity.player.EntityItemPickupEvent;
009
010import cpw.mods.fml.common.registry.GameRegistry;
011import net.minecraft.block.Block;
012import net.minecraft.block.material.Material;
013import net.minecraft.entity.Entity;
014import net.minecraft.entity.player.EntityPlayer;
015import net.minecraft.item.Item;
016import net.minecraft.item.ItemStack;
017import net.minecraft.nbt.NBTTagCompound;
018import net.minecraft.stats.AchievementList;
019import net.minecraft.util.DamageSource;
020import net.minecraft.util.MathHelper;
021import net.minecraft.util.StatCollector;
022import net.minecraft.world.World;
023
024public class EntityItem extends Entity
025{
026    /**
027     * The age of this EntityItem (used to animate it up and down as well as expire it)
028     */
029    public int age;
030    public int delayBeforeCanPickup;
031
032    /** The health of this EntityItem. (For example, damage for tools) */
033    private int health;
034
035    /** The EntityItem's random initial float height. */
036    public float hoverStart;
037
038    /**
039     * The maximum age of this EntityItem.  The item is expired once this is reached.
040     */
041    public int lifespan = 6000;
042
043    public EntityItem(World par1World, double par2, double par4, double par6)
044    {
045        super(par1World);
046        this.age = 0;
047        this.health = 5;
048        this.hoverStart = (float)(Math.random() * Math.PI * 2.0D);
049        this.setSize(0.25F, 0.25F);
050        this.yOffset = this.height / 2.0F;
051        this.setPosition(par2, par4, par6);
052        this.rotationYaw = (float)(Math.random() * 360.0D);
053        this.motionX = (double)((float)(Math.random() * 0.20000000298023224D - 0.10000000149011612D));
054        this.motionY = 0.20000000298023224D;
055        this.motionZ = (double)((float)(Math.random() * 0.20000000298023224D - 0.10000000149011612D));
056    }
057
058    public EntityItem(World par1World, double par2, double par4, double par6, ItemStack par8ItemStack)
059    {
060        this(par1World, par2, par4, par6);
061        this.func_92058_a(par8ItemStack);
062        this.lifespan = (par8ItemStack.getItem() == null ? 6000 : par8ItemStack.getItem().getEntityLifespan(par8ItemStack, par1World));
063    }
064
065    /**
066     * returns if this entity triggers Block.onEntityWalking on the blocks they walk on. used for spiders and wolves to
067     * prevent them from trampling crops
068     */
069    protected boolean canTriggerWalking()
070    {
071        return false;
072    }
073
074    public EntityItem(World par1World)
075    {
076        super(par1World);
077        this.age = 0;
078        this.health = 5;
079        this.hoverStart = (float)(Math.random() * Math.PI * 2.0D);
080        this.setSize(0.25F, 0.25F);
081        this.yOffset = this.height / 2.0F;
082    }
083
084    protected void entityInit()
085    {
086        this.getDataWatcher().addObjectByDataType(10, 5);
087    }
088
089    /**
090     * Called to update the entity's position/logic.
091     */
092    public void onUpdate()
093    {
094        super.onUpdate();
095
096        if (this.delayBeforeCanPickup > 0)
097        {
098            --this.delayBeforeCanPickup;
099        }
100
101        this.prevPosX = this.posX;
102        this.prevPosY = this.posY;
103        this.prevPosZ = this.posZ;
104        this.motionY -= 0.03999999910593033D;
105        this.noClip = this.pushOutOfBlocks(this.posX, (this.boundingBox.minY + this.boundingBox.maxY) / 2.0D, this.posZ);
106        this.moveEntity(this.motionX, this.motionY, this.motionZ);
107        boolean var1 = (int)this.prevPosX != (int)this.posX || (int)this.prevPosY != (int)this.posY || (int)this.prevPosZ != (int)this.posZ;
108
109        if (var1 || this.ticksExisted % 25 == 0)
110        {
111            if (this.worldObj.getBlockMaterial(MathHelper.floor_double(this.posX), MathHelper.floor_double(this.posY), MathHelper.floor_double(this.posZ)) == Material.lava)
112            {
113                this.motionY = 0.20000000298023224D;
114                this.motionX = (double)((this.rand.nextFloat() - this.rand.nextFloat()) * 0.2F);
115                this.motionZ = (double)((this.rand.nextFloat() - this.rand.nextFloat()) * 0.2F);
116                this.playSound("random.fizz", 0.4F, 2.0F + this.rand.nextFloat() * 0.4F);
117            }
118
119            if (!this.worldObj.isRemote)
120            {
121                this.func_85054_d();
122            }
123        }
124
125        float var2 = 0.98F;
126
127        if (this.onGround)
128        {
129            var2 = 0.58800006F;
130            int var3 = this.worldObj.getBlockId(MathHelper.floor_double(this.posX), MathHelper.floor_double(this.boundingBox.minY) - 1, MathHelper.floor_double(this.posZ));
131
132            if (var3 > 0)
133            {
134                var2 = Block.blocksList[var3].slipperiness * 0.98F;
135            }
136        }
137
138        this.motionX *= (double)var2;
139        this.motionY *= 0.9800000190734863D;
140        this.motionZ *= (double)var2;
141
142        if (this.onGround)
143        {
144            this.motionY *= -0.5D;
145        }
146
147        ++this.age;
148
149        ItemStack item = getDataWatcher().getWatchableObjectItemStack(10);
150
151        if (!this.worldObj.isRemote && this.age >= lifespan)
152        {
153            if (item != null)
154            {
155                ItemExpireEvent event = new ItemExpireEvent(this, (item.getItem() == null ? 6000 : item.getItem().getEntityLifespan(item, worldObj)));
156                if (MinecraftForge.EVENT_BUS.post(event))
157                {
158                    lifespan += event.extraLife;
159                }
160                else
161                {
162                    this.setDead();
163                }
164            }
165            else
166            {
167                this.setDead();
168            }
169        }
170
171        if (item != null && item.stackSize <= 0)
172        {
173            this.setDead();
174        }
175    }
176
177    private void func_85054_d()
178    {
179        Iterator var1 = this.worldObj.getEntitiesWithinAABB(EntityItem.class, this.boundingBox.expand(0.5D, 0.0D, 0.5D)).iterator();
180
181        while (var1.hasNext())
182        {
183            EntityItem var2 = (EntityItem)var1.next();
184            this.combineItems(var2);
185        }
186    }
187
188    /**
189     * Tries to merge this item with the item passed as the parameter. Returns true if successful. Either this item or
190     * the other item will  be removed from the world.
191     */
192    public boolean combineItems(EntityItem par1EntityItem)
193    {
194        if (par1EntityItem == this)
195        {
196            return false;
197        }
198        else if (par1EntityItem.isEntityAlive() && this.isEntityAlive())
199        {
200            ItemStack var2 = this.getEntityItem();
201            ItemStack var3 = par1EntityItem.getEntityItem();
202
203            if (var3.getItem() != var2.getItem())
204            {
205                return false;
206            }
207            else if (var3.hasTagCompound() ^ var2.hasTagCompound())
208            {
209                return false;
210            }
211            else if (var3.hasTagCompound() && !var3.getTagCompound().equals(var2.getTagCompound()))
212            {
213                return false;
214            }
215            else if (var3.getItem().getHasSubtypes() && var3.getItemDamage() != var2.getItemDamage())
216            {
217                return false;
218            }
219            else if (var3.stackSize < var2.stackSize)
220            {
221                return par1EntityItem.combineItems(this);
222            }
223            else if (var3.stackSize + var2.stackSize > var3.getMaxStackSize())
224            {
225                return false;
226            }
227            else
228            {
229                var3.stackSize += var2.stackSize;
230                par1EntityItem.delayBeforeCanPickup = Math.max(par1EntityItem.delayBeforeCanPickup, this.delayBeforeCanPickup);
231                par1EntityItem.age = Math.min(par1EntityItem.age, this.age);
232                par1EntityItem.func_92058_a(var3);
233                this.setDead();
234                return true;
235            }
236        }
237        else
238        {
239            return false;
240        }
241    }
242
243    public void func_70288_d()
244    {
245        this.age = 4800;
246    }
247
248    /**
249     * Returns if this entity is in water and will end up adding the waters velocity to the entity
250     */
251    public boolean handleWaterMovement()
252    {
253        return this.worldObj.handleMaterialAcceleration(this.boundingBox, Material.water, this);
254    }
255
256    /**
257     * Will deal the specified amount of damage to the entity if the entity isn't immune to fire damage. Args:
258     * amountDamage
259     */
260    protected void dealFireDamage(int par1)
261    {
262        this.attackEntityFrom(DamageSource.inFire, par1);
263    }
264
265    /**
266     * Called when the entity is attacked.
267     */
268    public boolean attackEntityFrom(DamageSource par1DamageSource, int par2)
269    {
270        if (this.isEntityInvulnerable())
271        {
272            return false;
273        }
274        else if (this.getEntityItem() != null && this.getEntityItem().itemID == Item.netherStar.itemID && par1DamageSource == DamageSource.explosion)
275        {
276            return false;
277        }
278        else
279        {
280            this.setBeenAttacked();
281            this.health -= par2;
282
283            if (this.health <= 0)
284            {
285                this.setDead();
286            }
287
288            return false;
289        }
290    }
291
292    /**
293     * (abstract) Protected helper method to write subclass entity data to NBT.
294     */
295    public void writeEntityToNBT(NBTTagCompound par1NBTTagCompound)
296    {
297        par1NBTTagCompound.setShort("Health", (short)((byte)this.health));
298        par1NBTTagCompound.setShort("Age", (short)this.age);
299        par1NBTTagCompound.setInteger("Lifespan", lifespan);
300
301        if (this.getEntityItem() != null)
302        {
303            par1NBTTagCompound.setCompoundTag("Item", this.getEntityItem().writeToNBT(new NBTTagCompound()));
304        }
305    }
306
307    /**
308     * (abstract) Protected helper method to read subclass entity data from NBT.
309     */
310    public void readEntityFromNBT(NBTTagCompound par1NBTTagCompound)
311    {
312        this.health = par1NBTTagCompound.getShort("Health") & 255;
313        this.age = par1NBTTagCompound.getShort("Age");
314        NBTTagCompound var2 = par1NBTTagCompound.getCompoundTag("Item");
315        this.func_92058_a(ItemStack.loadItemStackFromNBT(var2));
316
317        ItemStack item = getDataWatcher().getWatchableObjectItemStack(10);
318
319        if (item == null || item.stackSize <= 0)
320        {
321            this.setDead();
322        }
323
324        if (par1NBTTagCompound.hasKey("Lifespan"))
325        {
326            lifespan = par1NBTTagCompound.getInteger("Lifespan");
327        }
328    }
329
330    /**
331     * Called by a player entity when they collide with an entity
332     */
333    public void onCollideWithPlayer(EntityPlayer par1EntityPlayer)
334    {
335        if (!this.worldObj.isRemote)
336        {
337            if (this.delayBeforeCanPickup > 0)
338            {
339                return;
340            }
341
342            EntityItemPickupEvent event = new EntityItemPickupEvent(par1EntityPlayer, this);
343
344            if (MinecraftForge.EVENT_BUS.post(event))
345            {
346                return;
347            }
348
349            ItemStack var2 = this.getEntityItem();
350            int var3 = var2.stackSize;
351
352            if (this.delayBeforeCanPickup <= 0 && (event.getResult() == Result.ALLOW || var3 <= 0 || par1EntityPlayer.inventory.addItemStackToInventory(var2)))
353            {
354                if (var2.itemID == Block.wood.blockID)
355                {
356                    par1EntityPlayer.triggerAchievement(AchievementList.mineWood);
357                }
358
359                if (var2.itemID == Item.leather.itemID)
360                {
361                    par1EntityPlayer.triggerAchievement(AchievementList.killCow);
362                }
363
364                if (var2.itemID == Item.diamond.itemID)
365                {
366                    par1EntityPlayer.triggerAchievement(AchievementList.diamonds);
367                }
368
369                if (var2.itemID == Item.blazeRod.itemID)
370                {
371                    par1EntityPlayer.triggerAchievement(AchievementList.blazeRod);
372                }
373
374                GameRegistry.onPickupNotification(par1EntityPlayer, this);
375
376                this.playSound("random.pop", 0.2F, ((this.rand.nextFloat() - this.rand.nextFloat()) * 0.7F + 1.0F) * 2.0F);
377                par1EntityPlayer.onItemPickup(this, var3);
378
379                if (var2.stackSize <= 0)
380                {
381                    this.setDead();
382                }
383            }
384        }
385    }
386
387    /**
388     * Gets the username of the entity.
389     */
390    public String getEntityName()
391    {
392        return StatCollector.translateToLocal("item." + this.getEntityItem().getItemName());
393    }
394
395    /**
396     * If returns false, the item will not inflict any damage against entities.
397     */
398    public boolean canAttackWithItem()
399    {
400        return false;
401    }
402
403    /**
404     * Teleports the entity to another dimension. Params: Dimension number to teleport to
405     */
406    public void travelToDimension(int par1)
407    {
408        super.travelToDimension(par1);
409
410        if (!this.worldObj.isRemote)
411        {
412            this.func_85054_d();
413        }
414    }
415
416    /**
417     * Returns the ItemStack corresponding to the Entity (Note: if no item exists, will log an error but still return an
418     * ItemStack containing Block.stone)
419     */
420    public ItemStack getEntityItem()
421    {
422        ItemStack var1 = this.getDataWatcher().getWatchableObjectItemStack(10);
423
424        if (var1 == null)
425        {
426            System.out.println("Item entity " + this.entityId + " has no item?!");
427            return new ItemStack(Block.stone);
428        }
429        else
430        {
431            return var1;
432        }
433    }
434
435    public void func_92058_a(ItemStack par1ItemStack)
436    {
437        this.getDataWatcher().updateObject(10, par1ItemStack);
438        this.getDataWatcher().func_82708_h(10);
439    }
440}