battles/classes/Battles/ShopItem.php

<?php

namespace Battles;

use Battles\Database\Db;

class ShopItem extends Item
{
    private const NO_ITEMS_IN_STOCK = "Товара нет в наличии!";
    private const NO_BARTER_ITEMS = 'У вас нет требуемых предметов!';
    private const BUTTON = [
        'setmarket' => 'Сдать в магазин',
        'buymarket' => 'Купить с рук',
        'sellshop' => 'Продать',
        'buyshop' => 'Купить',
    ];
    private const BUY_QUERY = <<<SQL
insert into inventory (
    owner_id, name, item_type, durability,
    need_strength, need_dexterity, need_intuition, need_endurance, need_intelligence, need_wisdom,
    add_strength, add_dexterity, add_intuition, add_endurance, add_intelligence, add_wisdom,
    add_accuracy, add_evasion, add_criticals, add_min_physical_damage, add_max_physical_damage,
    image, weight, price) 
select 
    ?, name, item_type, durability,
    need_strength, need_dexterity, need_intuition, need_endurance, need_intelligence, need_wisdom,
    add_strength, add_dexterity, add_intuition, add_endurance, add_intelligence, add_wisdom,
    add_accuracy, add_evasion, add_criticals, add_min_physical_damage, add_max_physical_damage,
    image, weight, greatest(
        (
            (add_strength + add_dexterity + add_intuition + add_endurance + add_intelligence + add_wisdom) * 
            (5 + floor((add_strength + add_dexterity + add_intuition + add_endurance + add_intelligence + add_wisdom) / 10)) 
        ) + 
        ( 
            (add_accuracy + add_criticals + add_evasion) * 
            (2 + floor((add_accuracy + add_criticals + add_evasion) / 50)) 
        ) + 
        ( 
            (add_min_physical_damage + add_max_physical_damage) * 
            (1 + floor((add_min_physical_damage + add_max_physical_damage) / 100))
        )
    ,1) 
from items where id = ?
SQL;

    // Тип операции в магазине. Для отображения разных блоков в разных случаях.
    private $optype;
    private ?int $shop_item_quantity;
    private ?int $price;
    public static string $status = '';
    private ?string $jsonBarterList;
    private int $offerId;
    private int $ownerId = 0;

    public function __construct($row, $operationType = null)
    {
        parent::__construct($row);
        if ($operationType) {
            $this->optype = $operationType;
        }
        $this->price = $row->price ?? null;
        $this->shop_item_quantity = $row->shop_item_quantity ?? null;
        $this->item_id = $row->item_id ?? $row->id;
        if ($operationType === 'buyshop' || $operationType === 'buymarket') {
            $this->offerId = $row->offer_id ?? 0; // Ид позиции в магазине.
            $this->jsonBarterList = $row->barter_items_list_json ?? null;
        }
        if ($operationType === 'buymarket') {
            $this->ownerId = $row->owner_id;
        }
    }

    public function printInfo(): string
    {
        $str = $this->getAllInfo();
        if ($this->optype === 'buyshop') {
            $str .= $this->getLowItemQuantityNote();
            $str .= $this->getBarterList();
        }
        if ($this->optype === 'sellshop') {
            $str .= $this->getTextBasedOnPrice();
        }
        if ($this->optype === 'buymarket') {
            $str .= $this->getBarterList();
            $str .= '<br><br>Продавец: ' . Nick::id($this->ownerId)->full(1);
        }
        return $str;
    }

    private function getBarterList(): string
    {
        if (!$this->jsonBarterList) {
            return '';
        }
        $str = '<div><br>Помимо денег требуются следующие товары:';
        foreach (json_decode($this->jsonBarterList) as $item) {
            $str .= '<br>↣ ' . Item::getItemById($item->item_id)->name . ', ' . $item->quantity . ' шт.';
        }
        $str .= '</div>';
        return $str;
    }

    private function getLowItemQuantityNote(): string
    {
        if ($this->shop_item_quantity < 1 || $this->shop_item_quantity > 19) {
            return '';
        }
        return "<div style='margin-top: 9px; font-style: italic;'>На складе осталось $this->shop_item_quantity единиц товара!</div>";
    }

    private function getTextBasedOnPrice(): string
    {
        if ($this->getSellPriceMean() < 50) {
            $goods = 'этот хлам';
        } elseif ($this->getSellPriceMean() < 100) {
            $goods = 'этот посредственный товар';
        } elseif ($this->getSellPriceMean() < 500) {
            $goods = 'этот неплохой предмет';
        } elseif ($this->getSellPriceMean() < 1000) {
            $goods = 'эту отличную штуку';
        } else {
            $goods = 'это превосходное изделие';
        }
        return "<div style='margin-top: 9px; font-style: italic;'>В среднем за $goods можно выручить <span class='success'>{$this->getSellPriceMean()}</span> кр.</div>";
    }

    public function printImage(): string
    {
        if (!$this->image) {
            $this->image = 'noitem.png';
        }
        return "<img src='/i/sh/$this->image' class='item-wrap-normal' alt=''>";
    }

    public static function buyItem($id)
    {
        $check = Db::getInstance()->ofetch("select * from trade_offers where offer_id = ?", $id);
        $item = new Item(Db::getInstance()->fetch('select * from items where id = ?', $check->shop_item_id));
        $price = $item->calculateItemCost();

        if (
            !self::checkAndRemoveBarteredItems($check->barter_items_list_json, User::getInstance()->getId()) ||
            !self::checkAndPayTheBills($price) ||
            !self::checkAndChangeRemainingItems($check->shop_item_quantity, $check->shop_item_id)
        ) {
            return;
        }

        Db::getInstance()->execute(self::BUY_QUERY, [User::getInstance()->getId(), $check->shop_item_id]);
        $deloText = User::getInstance()->getLogin() . " купил товар «" . $item->name . "» id:(" . $check->shop_item_id . ") в магазине за " . $price . ".";
        GameLogs::addUserLog(User::getInstance()->getId(), $deloText);
        self::$status = "Предмет " . $item->name . " куплен за " . $price . ".";
    }

    private static function checkAndRemoveBarteredItems(?string $json_list, int $user_id): bool
    {
        if (empty($json_list)) {
            return true;
        }
        $allowItemRemove = true;
        foreach (json_decode($json_list) as $item) {
            $row = Db::getInstance()->ofetch('select sum(1) as s from inventory where name = ? and owner_id = ?', [Item::getItemById($item->item_id)->name, $user_id]);
            if ($row->s < $item->quantity) {
                $allowItemRemove = false;
            }
        }
        if (!$allowItemRemove) {
            self::$status = self::NO_BARTER_ITEMS;
            return false;
        }
        foreach (json_decode($json_list) as $item) {
            $query = 'delete from inventory where name = ? and owner_id = ? limit ' . (int)$item->quantity;
            // У-у-у, сука! https://phpdelusions.net/pdo#limit
            Db::getInstance()->execute($query, [Item::getItemById($item->item_id)->name, $user_id]);
        }
        return true;
    }

    private static function checkAndPayTheBills(int $price): bool
    {
        if (User::getInstance()->money()->spend($price)) {
            return true;
        }
        (new Bank())->withdrawMoney($price);
        return true;
    }

    private static function checkAndChangeRemainingItems(int $current_quantity, $item_id): bool
    {
        if (empty($current_quantity)) {
            self::$status = self::NO_ITEMS_IN_STOCK;
            return false;
        }
        if ($current_quantity === -1) {
            return true;
        }
        Db::getInstance()->execute("update trade_offers set shop_item_quantity = shop_item_quantity -1 where shop_item_quantity != -1 and shop_item_id = ? ", $item_id);
        return true;
    }

    public static function sellItem($id, $bankTrade = 0)
    {
        $item = Db::getInstance()->ofetch('select * from inventory where item_id = ?', $id);
        $sellingItemName = $item->name;
        // Продажа за цену от нуля до половины стоимости.
        $sellingPrice = $item->price > 1 ? mt_rand(0, $item->price / 2) : mt_rand(0, 1);
        Db::getInstance()->execute('delete from inventory where item_id = ?', $id);
        if ($bankTrade) {
            User::getInstance()->money()->modifyBank($sellingPrice, 'sellShop');
        } else {
            User::getInstance()->money()->earn($sellingPrice);
        }
        $deloText = User::getInstance()->getLogin() . " продал товар «{$sellingItemName}» id:($id) в магазине за $sellingPrice кр.";
        GameLogs::addUserLog(User::getInstance()->getId(), $deloText);
        if ($sellingPrice == 0) {
            self::$status = "После длительных и изнурительных торгов вы плюнули на всё и просто подарили ваш «{$sellingItemName}» торговцу.";
        } else {
            self::$status = "Вы продали «{$sellingItemName}» за $sellingPrice кр.";
        }
    }

    /** Подчсчёт средней суммы продажи.
     * @return int
     */
    private function getSellPriceMean(): ?int
    {
        if ($this->price > 1) {
            $arr = range(0, $this->price / 2);
            return array_sum($arr) / count($arr);
        } else {
            return $this->price == 1 ? 1 : null;
        }
    }

    /**
     * Для кнопок управления под картинкой предмета в зависимости от ситуации.
     */
    public function printControls(): string
    {
        if (!in_array($this->optype, ['setmarket', 'buymarket', 'sellshop', 'buyshop',])) {
            return '';
        }
        $str = $this->optype == 'setmarket' ? '<input placeholder=" ' . $this->price . ' " name="cost">' : '';
        $hiddenValue = $this->optype === 'buyshop' ? $this->offerId : $this->item_id;
        $button_name = self::BUTTON[$this->optype];
        return <<<FORM
<form method="post">$str
<input type="hidden" name="itemId" value="$hiddenValue">
<br><input type="submit" name="$this->optype" value="$button_name">
</form>
FORM;
    }

    /**
     * @return int
     */
    public function getItemType(): int
    {
        return $this->item_type;
    }

    /** Выдача магазинных предметов по запросу.
     * Ввелась чтобы перебить takeshopitem() в functions с идентичным функционалом.
     *
     * @param int $item_id ИД предмета.
     * @param int $to      ИД пперсонажа-получателя.
     */
    public static function giveNewItem(int $item_id, int $to): array
    {
        $check = Db::getInstance()->ofetch('select 1 from items where id = ?', $item_id);
        if (!$check) {
            return [];
        }
        Db::getInstance()->execute(self::BUY_QUERY, [$to, $item_id]);
        $return = Db::getInstance()->ofetch('select image, name from inventory where item_id = ?', Db::getInstance()->lastInsertId());
        return [
            'img' => $return->image,
            'name' => $return->name,
            'id' => $item_id,
        ];
    }

}