EMC /shops

//There are more imports. These are just the ones that are not part of the core bukkit API.
import EMC.getRes //Is not called this. Explained later.
import com.Acrobot.Breeze.Utils.MaterialUtil
import com.Acrobot.Breeze.Utils.InventoryUtil
import com.Acrobot.ChestShop.Events.ShopCreatedEvent

/*
assume file named shops.db
contains array of all blocks and items. Let's call this items
The index of each entry corresponds to the item that entry represents.
items[1] contains all shops selling stone,
items[13] contains all shops selling gravel,
items[262] contains all shops selling arrows.

items[1] is another array, containing all of the shops selling that item (not sorted in any order)
items[1][0] is the first shop added (programmers count starting with 0)
items[1][1] is the second shop added
and so on.

each of those are a third array, containing all of the data associated with that shop.
items[1][0][price] contains the cost of dirt from the 1st dirt shop.
items[1][0][chestloc] contains the location of the chest
*/

on event=ShopCreatedEvent():
//This runs whenever ShopCreatedEvent() happens.
//The event gets stored in the event variable.

    array tosave[] //contains stuff we will write to shop DB

    signtext=event.getSignLines() //Gets text on shop sign
    qty=signtext[2]              //gets number of items sold at a time
    price=signtext[3]           //and how much they sell for.
    item=signtext[4]           //and the item being sold.
    itemid=MaterialUtil.getMaterial(item)//gets item id from item name

    tosave.append(qty)
    tosave.append(price)    //Add stuff to save

    chest=event.getChest()             //Gets chest attached to shop
    chestblock=chest.getBlock()       //Gets block occupied by chest
    chestloc=chestblock.getLocation()//Gets the location of the chest

    tosave.append(chestloc) //Add stuff to save

    /*
    There is a function that EMC uses to determine what res a block is in.
    This is used to determine if a player has permissions to destroy that block.
    I don't know what it is called, so I will call it EMC.getRes().
    We will feed it the chest's location, and it will tell us what res it's in.
    If this is part of a larger function, create a separate function for it.
    */

    chestres=EMC.getRes(chestloc) //get res id from chest location

    tosave.append(chestres) //Add stuff to save

    /*
    we are done generating stuff. Now let's save it!
    NOTE: This step currently reads and writes the ENTIRE database file everytime a shop is created.
    This should be changed so it only reads and writes what it needs to.
    This step should also probably be run in a separate thread.
    */

    items=load(shops.db)        //load shops database from shops.db
    items[itemid].append(tosave)//Add shop to database
    write(shops.db,items)       //write shops database to shops.db

def getContents(chest,itemid):
    contents=chest.getBlockInventory()//Gets contents of chest
    amount=getAmount(contents, ItemStack(itemid))//Gets amount in stock
    return amount //returns amount of items in chest

def getChestFromLoc(location):
    block=location.getBlock() //get block at location
    if (block.getType() == Material.CHEST): //makes sure it is a chest. If we skip this, it might have changed, and the plugin will crash!
        return (Chest) block.getState()    //returns chest item at location.

on event=onCommand(/shops):
    //runs when user types /shops.
    //event is stored in event.
    args=onCommand.args //gets requested item
    if args.length=1: //if user typed in [item], assume they want to buy it.
        listShopsSelling(sender,args[0]) //list all shops selling item
    else if args.length=2: //this means they typed [buy|sell] [item]
        if args[0]="buy": //they want to buy item
            return listShopsSelling(sender,args[1]) //list all shops selling item, return true if success
        else if args[0]="sell": //they want to sell item
            return listShopsBuying(sender,args[1])  //list all shops buying item, return true if success
        else: //Problem! They typed something other than buy or sell!
            return false //Display help message
    else: //They typed 0 arguments, or more than 2
        sender.sendMessage("Wrong number of arguments!")
        return false //Display help message
    return false //We will only get here if something went wrong. Display help message.

def listShopsSelling(sender,item) //prints list of shops selling item
    itemid=MaterialUtil.getMaterial(item)//gets item id from item name
    items=load(shops.db)        //load shops database from shops.db
    sender.sendMessage("Stores selling "+item+":") //Print info
    sender.sendMessage("§nRes #     |Qty.      |Price     |# in stock") //print table headers
    for shop in items[itemid]:
    //run this once for every shop selling the item
        loc=shop[chestloc]         //reads location of chest
        chest=getChestFromLoc(loc)//gets chest at location
        inv=getContents(chest,itemid)   //gets amount of item in chest
        res=shop[res]
        resstr=formatstr(str(res)) //converts res to string and properly formats it.
        qty=shop[qty]
        qtystr=formatstr(str(qty)) //converts qty to string and properly formats it.
        price=shop[price]
        pricestr=formatstr(str(price)) //converts price to string and properly formats it.
        invstr=formatstr(str(inv)) //converts inv to string and properly formats it.
        if inv>=qty //if there are enough items to sell,
        sender.sendMessage(resstr+"|"+qtystr+"|"+pricestr+"|"+invstr) //Print table row

def listShopsBuying(sender,item): //prints list of shops buying item
    //not implemented yet.

def formatstr(str): //properly formats string
    trimmed=str.substring(0, Math.min(str.length(), 9)) //trims the string down to 10 characters
    padded=String.format("%10s", trimmed) //pads the string to 10 characters
    return padded