minecraft-pi-reborn/mods/src/bucket/bucket.cpp

#include <libreborn/libreborn.h>
#include <symbols/minecraft.h>

#include <mods/feature/feature.h>
#include <mods/init/init.h>
#include <mods/misc/misc.h>

// Items
Item *bucket = NULL;

// Description And Texture
static std::string BucketItem_getDescriptionId(__attribute__((unused)) Item *item, ItemInstance *item_instance) {
    if (item_instance->auxiliary == (*Tile_water)->id) {
        return "item.bucketWater";
    } else if (item_instance->auxiliary == (*Tile_lava)->id) {
        return "item.bucketLava";
    } else {
        return "item.bucket";
    }
}
static int32_t BucketItem_getIcon(__attribute__((unused)) Item *item, int32_t auxiliary) {
    if (auxiliary == (*Tile_water)->id) {
        return 75;
    } else if (auxiliary == (*Tile_lava)->id) {
        return 76;
    } else {
        return 74;
    }
}

// Use Bucket
static int32_t BucketItem_useOn(__attribute__((unused)) Item *item, ItemInstance *item_instance, Player *player, Level *level, int32_t x, int32_t y, int32_t z, int32_t hit_side, __attribute__((unused)) float hit_x, __attribute__((unused)) float hit_y, __attribute__((unused)) float hit_z) {
    if (item_instance->count < 1) {
        return 0;
    } else if (item_instance->auxiliary == 0) {
        // Empty Bucket
        int32_t new_auxiliary = 0;
        int32_t tile = level->vtable->getTile(level, x, y, z);
        if (tile == (*Tile_calmWater)->id) {
            new_auxiliary = (*Tile_water)->id;
        } else if (tile == (*Tile_calmLava)->id) {
            new_auxiliary = (*Tile_lava)->id;
        }
        if (new_auxiliary != 0) {
            // Valid
            bool success = false;
            if (item_instance->count == 1) {
                item_instance->auxiliary = new_auxiliary;
                success = true;
            } else {
                ItemInstance new_item;
                new_item.id = bucket->id;
                new_item.count = 1;
                new_item.auxiliary = new_auxiliary;
                Inventory *inventory = player->inventory;
                if (inventory->vtable->add(inventory, &new_item)) {
                    // Added To Inventory
                    success = true;
                    item_instance->count -= 1;
                }
            }
            if (success) {
                (*Level_setTileAndData)(level, x, y, z, 0, 0);
                return 1;
            } else {
                return 0;
            }
        } else {
            // Invalid
            return 0;
        }
    } else {
        // Place
        switch (hit_side) {
            case 0: {
                y -= 1;
                break;
            }
            case 1: {
                y += 1;
                break;
            }
            case 2: {
                z -= 1;
                break;
            }
            case 3: {
                z += 1;
                break;
            }
            case 4: {
                x -= 1;
                break;
            }
            case 5: {
                x += 1;
                break;
            }
        }
        // Get Current Tile
        bool valid = false;
        Material *material = level->vtable->getMaterial(level, x, y, z);
        if (material != NULL) {
            valid = !material->vtable->isSolid(material);
        }
        if (item_instance->auxiliary != (*Tile_water)->id && item_instance->auxiliary != (*Tile_lava)->id) {
            valid = false;
        }
        if (valid) {
            (*Level_setTileAndData)(level, x, y, z, item_instance->auxiliary, 0);
            item_instance->auxiliary = 0;
            return 1;
        } else {
            return 0;
        }
    }
}

// Bucket VTable
static Item_vtable *get_bucket_vtable() {
    static Item_vtable *vtable = NULL;
    if (vtable == NULL) {
        // Init
        vtable = dup_Item_vtable(Item_vtable_base);
        ALLOC_CHECK(vtable);

        // Modify
        vtable->getDescriptionId = BucketItem_getDescriptionId;
        vtable->getIcon = BucketItem_getIcon;
        vtable->useOn = BucketItem_useOn;
    }
    return vtable;
}

// Create Items
static Item *create_bucket(int32_t id, int32_t texture_x, int32_t texture_y, std::string name) {
    // Construct
    Item *item = alloc_Item();
    ALLOC_CHECK(item);
    (*Item_constructor)(item, id);

    // Set VTable
    item->vtable = get_bucket_vtable();

    // Setup
    item->vtable->setIcon(item, texture_x, texture_y);
    item->vtable->setDescriptionId(item, &name);
    item->is_stacked_by_data = 1;
    item->category = 2;
    item->max_damage = 0;
    item->max_stack_size = 1;

    // Return
    return item;
}
static void Item_initItems_injection(__attribute__((unused)) void *null) {
    bucket = create_bucket(69, 10, 4, "bucket");
}

// Change Max Stack Size Based On Auxiliary
static int32_t ItemInstance_getMaxStackSize_injection(ItemInstance *item_instance) {
    if (item_instance->id == bucket->id && item_instance->auxiliary == 0) {
        // Custom Value
        return 16;
    } else {
        // Call Original Method
        return (*ItemInstance_getMaxStackSize)(item_instance);
    }
}

// Creative Inventory
static void inventory_add_item(FillingContainer *inventory, Item *item, int32_t auxiliary) {
    ItemInstance *item_instance = new ItemInstance;
    ALLOC_CHECK(item_instance);
    item_instance = (*ItemInstance_constructor_item_extra)(item_instance, item, 1, auxiliary);
    (*FillingContainer_addItem)(inventory, item_instance);
}
static void Inventory_setupDefault_FillingContainer_addItem_call_injection(FillingContainer *filling_container) {
    inventory_add_item(filling_container, bucket, 0);
    inventory_add_item(filling_container, bucket, (*Tile_water)->id);
    inventory_add_item(filling_container, bucket, (*Tile_lava)->id);
}

// Make Liquids Selectable
static bool is_holding_bucket = false;
static HitResult Mob_pick_Level_clip_injection(Level *level, unsigned char *param_1, unsigned char *param_2, __attribute__((unused)) bool clip_liquids, bool param_3) {
    // Call Original Method
    return (*Level_clip)(level, param_1, param_2, is_holding_bucket, param_3);
}
static void handle_tick(Minecraft *minecraft) {
    LocalPlayer *player = minecraft->player;
    if (player != NULL) {
        // Get Selected Slot
        int32_t selected_slot = misc_get_real_selected_slot((Player *) player);
        Inventory *inventory = player->inventory;

        // Get Item
        ItemInstance *inventory_item = inventory->vtable->getItem(inventory, selected_slot);
        // Check
        is_holding_bucket = inventory_item != NULL && inventory_item->id == bucket->id && inventory_item->auxiliary == 0;
    }
}

// Prevent Breaking Liquid
static bool is_calm_liquid(int32_t id) {
    if (id == (*Tile_calmWater)->id) {
        return true;
    } else if (id == (*Tile_calmLava)->id) {
        return true;
    } else {
        return false;
    }
}
static void Minecraft_handleMouseDown_injection(Minecraft *minecraft, int param_1, bool can_destroy) {
    // Check
    Level *level = minecraft->level;
    if (level != NULL) {
        int32_t x = minecraft->hit_result.x;
        int32_t y = minecraft->hit_result.y;
        int32_t z = minecraft->hit_result.z;
        int32_t tile = level->vtable->getTile(level, x, y, z);
        if (is_calm_liquid(tile)) {
            can_destroy = false;
        }
    }

    // Call Original Method
    (*Minecraft_handleMouseDown)(minecraft, param_1, can_destroy);
}

// Custom Crafting Recipes
static void Recipes_injection(Recipes *recipes) {
    // Add
    Recipes_Type type1 = {
        .item = 0,
        .tile = 0,
        .instance = {
            .count = 3,
            .id = 265,
            .auxiliary = 0
        },
        .letter = '#'
    };
    ItemInstance result = {
        .count = 1,
        .id = bucket->id,
        .auxiliary = 0
    };
    std::string line1 = "# #";
    std::string line2 = " # ";
    std::vector<Recipes_Type> types = {type1};
    (*Recipes_addShapedRecipe_2)(recipes, &result, &line1, &line2, &types);
}

// Custom Furnace Fuel
static int32_t FurnaceTileEntity_getBurnDuration_injection(ItemInstance *item_instance) {
    if (item_instance->count > 0 && item_instance->id == bucket->id && item_instance->auxiliary == (*Tile_lava)->id) {
        return 20000;
    } else {
        // Call Original Method
        return (*FurnaceTileEntity_getBurnDuration)(item_instance);
    }
}
static void FurnaceTileEntity_tick_ItemInstance_setNull_injection(ItemInstance *item_instance) {
    // Replace Lava Bucket With Empty Bucket When It Burns Out
    if (item_instance->id == bucket->id) {
        item_instance->auxiliary = 0;
    } else {
        // Original Behavior
        item_instance->count = 0;
        item_instance->id = 0;
        item_instance->auxiliary = 0;
    }
}

// Init
void init_bucket() {
    // Add Buckets
    if (feature_has("Add Buckets", server_enabled)) {
        // Add Items
        misc_run_on_items_setup(Item_initItems_injection);
        // Change Max Stack Size Based On Auxiliary
        overwrite_calls((void *) ItemInstance_getMaxStackSize, (void *) ItemInstance_getMaxStackSize_injection);
        // Creative Inventory
        misc_run_on_creative_inventory_setup(Inventory_setupDefault_FillingContainer_addItem_call_injection);
        // Make Liquids Selectable
        overwrite_call((void *) 0x7f5b0, (void *) Mob_pick_Level_clip_injection);
        misc_run_on_tick(handle_tick);
        // Prevent Breaking Liquid
        overwrite_calls((void *) Minecraft_handleMouseDown, (void *) Minecraft_handleMouseDown_injection);
        // Custom Crafting Recipes
        misc_run_on_recipes_setup(Recipes_injection);
        // Custom Furnace Fuel
        overwrite_calls((void *) FurnaceTileEntity_getBurnDuration, (void *) FurnaceTileEntity_getBurnDuration_injection);
        overwrite_call((void *) 0xd351c, (void *) FurnaceTileEntity_tick_ItemInstance_setNull_injection);
    }
}