## Shop Items By Badge Count

Credit to ghoulslash

Pokemart/Shop Items have been determined by the player's badge count for some time. So let's add this feature with Generation VIII items!

### Add the item lists
Open [src/shop.c](../blob/master/src/shop.c). Add the following above _sShopPurchaseYesNoFuncs_
```c
static const u16 sShopInventory_ZeroBadges[] = {
    ITEM_POKE_BALL,
    ITEM_POTION,
    ITEM_ANTIDOTE,
    ITEM_BURN_HEAL,
    ITEM_ICE_HEAL,
    ITEM_AWAKENING,
    ITEM_PARALYZE_HEAL,
    ITEM_REVIVE,
    ITEM_NONE
};

static const u16 sShopInventory_OneBadge[] = {
    ITEM_POKE_BALL,
    ITEM_GREAT_BALL,
    ITEM_POTION,
    ITEM_SUPER_POTION,
    ITEM_ANTIDOTE,
    ITEM_BURN_HEAL,
    ITEM_ICE_HEAL,
    ITEM_AWAKENING,
    ITEM_PARALYZE_HEAL,
    ITEM_REVIVE,
    ITEM_NONE
};

static const u16 sShopInventory_TwoBadges[] = {
    ITEM_POKE_BALL,
    ITEM_GREAT_BALL,
    ITEM_POTION,
    ITEM_SUPER_POTION,
    ITEM_ANTIDOTE,
    ITEM_BURN_HEAL,
    ITEM_ICE_HEAL,
    ITEM_AWAKENING,
    ITEM_PARALYZE_HEAL,
    ITEM_REVIVE,
    ITEM_POKE_DOLL,
    ITEM_NONE
};

static const u16 sShopInventory_ThreeBadges[] = {
    ITEM_POKE_BALL,
    ITEM_GREAT_BALL,
    ITEM_POTION,
    ITEM_SUPER_POTION,
    ITEM_ANTIDOTE,
    ITEM_BURN_HEAL,
    ITEM_ICE_HEAL,
    ITEM_AWAKENING,
    ITEM_PARALYZE_HEAL,
    ITEM_REVIVE,
    ITEM_REPEL,
    ITEM_POKE_DOLL,
    ITEM_NONE
};

static const u16 sShopInventory_FourBadges[] = {
    ITEM_POKE_BALL,
    ITEM_GREAT_BALL,
    ITEM_POTION,
    ITEM_SUPER_POTION,
    ITEM_HYPER_POTION,
    ITEM_ANTIDOTE,
    ITEM_BURN_HEAL,
    ITEM_ICE_HEAL,
    ITEM_AWAKENING,
    ITEM_PARALYZE_HEAL,
    ITEM_REVIVE,
    ITEM_REPEL,
    ITEM_POKE_DOLL,
    ITEM_NONE
};

static const u16 sShopInventory_FiveBadges[] = {
    ITEM_POKE_BALL,
    ITEM_GREAT_BALL,
    ITEM_ULTRA_BALL,
    ITEM_POTION,
    ITEM_SUPER_POTION,
    ITEM_HYPER_POTION,
    ITEM_ANTIDOTE,
    ITEM_BURN_HEAL,
    ITEM_ICE_HEAL,
    ITEM_AWAKENING,
    ITEM_PARALYZE_HEAL,
    ITEM_REVIVE,
    ITEM_REPEL,
    ITEM_SUPER_REPEL,
    ITEM_POKE_DOLL,
    ITEM_NONE
};

static const u16 sShopInventory_SixBadges[] = {
    ITEM_POKE_BALL,
    ITEM_GREAT_BALL,
    ITEM_ULTRA_BALL,
    ITEM_POTION,
    ITEM_SUPER_POTION,
    ITEM_HYPER_POTION,
    ITEM_ANTIDOTE,
    ITEM_BURN_HEAL,
    ITEM_ICE_HEAL,
    ITEM_AWAKENING,
    ITEM_PARALYZE_HEAL,
    ITEM_FULL_HEAL,
    ITEM_REVIVE,
    ITEM_REPEL,
    ITEM_SUPER_REPEL,
    ITEM_POKE_DOLL,
    ITEM_NONE
};

static const u16 sShopInventory_SevenBadges[] = {
    ITEM_POKE_BALL,
    ITEM_GREAT_BALL,
    ITEM_ULTRA_BALL,
    ITEM_POTION,
    ITEM_SUPER_POTION,
    ITEM_HYPER_POTION,
    ITEM_MAX_POTION,
    ITEM_ANTIDOTE,
    ITEM_BURN_HEAL,
    ITEM_ICE_HEAL,
    ITEM_AWAKENING,
    ITEM_PARALYZE_HEAL,
    ITEM_FULL_HEAL,
    ITEM_REVIVE,
    ITEM_REPEL,
    ITEM_SUPER_REPEL,
    ITEM_MAX_REPEL,
    ITEM_POKE_DOLL,
    ITEM_NONE
};

static const u16 sShopInventory_EightBadges[] = {
    ITEM_POKE_BALL,
    ITEM_GREAT_BALL,
    ITEM_ULTRA_BALL,
    ITEM_POTION,
    ITEM_SUPER_POTION,
    ITEM_HYPER_POTION,
    ITEM_MAX_POTION,
    ITEM_FULL_RESTORE,
    ITEM_ANTIDOTE,
    ITEM_BURN_HEAL,
    ITEM_ICE_HEAL,
    ITEM_AWAKENING,
    ITEM_PARALYZE_HEAL,
    ITEM_FULL_HEAL,
    ITEM_REVIVE,
    ITEM_REPEL,
    ITEM_SUPER_REPEL,
    ITEM_MAX_REPEL,
    ITEM_POKE_DOLL,
    ITEM_NONE
};

static const u16 *const sShopInventories[] = 
{
    sShopInventory_ZeroBadges, 
    sShopInventory_OneBadge,
    sShopInventory_TwoBadges,
    sShopInventory_ThreeBadges,
    sShopInventory_FourBadges,
    sShopInventory_FiveBadges,
    sShopInventory_SixBadges,
    sShopInventory_SevenBadges,
    sShopInventory_EightBadges
};
```

### Make the file recognize the item definitions
In the same file, add `#include "event_data.h"` at the top of the tile (above `#include "event_object_movement.h"` is a good spot)

### Make the game load our new item data
Edit the function, `static void SetShopItemsForSale(const u16 *items)`, to the following
```c
static void SetShopItemsForSale(const u16 *items)
{
    u16 i = 0;
    u8 badgeCount = GetNumberOfBadges();

    if (items == NULL)
        gMartInfo.itemList = sShopInventories[badgeCount];
    else
        gMartInfo.itemList = items;

    gMartInfo.itemCount = 0;
    while (gMartInfo.itemList[i])
    {
        gMartInfo.itemCount++;
        i++;
    }
}
```

Finally, add the function `GetNumberOfBadges` somewhere above `SetShopItemsForSale` (directly above is fine)
```c
static u8 GetNumberOfBadges(void)
{
    u16 badgeFlag;
    u8 count = 0;
    
    for (badgeFlag = FLAG_BADGE01_GET; badgeFlag < FLAG_BADGE01_GET + NUM_BADGES; badgeFlag++)
    {
        if (FlagGet(badgeFlag))
            count++;
    }
    
    return count;
}
```

### Usage
In any script, replace `pokemart <itemList>` with `pokemart 0` to load the items based on the player's badge count. And that's it!