engine/Paginator.php - master - Malenych/techart_test

engine/Paginator.php
124 строки4 KB
Andrey Malenko
Исправление условий выбора стриницы паджинатором
25 янв 2026, 18:08
25 янв 2026, 18:08cbcb39d
<?php

namespace Engine;

use Engine\Config;

class Paginator
{
    private int $per_page;
    private int $count;
    private int $page_count;
    private int $page;
    private $order_row = null;
    private $order_type = 'DESC';

    public function __construct(private string $class_name, int|null $per_page = null)
    {
        if ($per_page) {
            $this->per_page = $per_page;
        } else {
            $this->per_page = Config::get('news.per_page');
        }

        $this->count = $this->class_name::count();
        $this->setPageCount();
    }

    /**
     * Устанавливает текущую страницу
     * @param int $page
     * @return Paginator
     */
    public function setPage(int $page): static
    {
        if ($page >= 1 && $page <=$this->page_count) {
            $this->page = $page;
        } else {
            $this->page = 1;
        }
        return $this;
    }

    /**
     * Summary of setOrder
     * @param string|null $order_row
     * @param string $order_type
     * @return Paginator
     */
    public function setOrder(string|null $order_row = null, string $order_type = 'DESC'): static
    {
        $this->order_row = $order_row;
        $this->order_type = $order_type;
        return $this;
    }

    /**
     * Получить записи из базы данных для текущего пагинатора
     * @return array
     */
    public function recordings(): array
    {
        $from_rec = $this->page * $this->per_page - $this->per_page;
        return $this->class_name::all($from_rec, $this->per_page, $this->order_row, $this->order_type);
    }

    public function HTML(string $link = '', string $html_class_name = ''): string
    {
        $html_pages = "";
        // Добавить стрелку, если страница не первая
        if ($this->page !== 1) {
            $prev_li_class = $this->getHTMLClass($html_class_name, "__prev-page", $html_class_name . "__page");
            $prev_a_class = $this->getHTMLClass($html_class_name, "__prev-link");
            $html_pages .= "\t<li" . $prev_li_class . ">\n\t\t<a href=\"" . $link . "?page=" . $this->page - 1 . "\"" . $prev_a_class . "></a>\n\t</li>\n";
        }

        for ($i = 1; $i <= $this->page_count; $i++) {
            if ($i === $this->page) {
                $li_class = $this->getHTMLClass($html_class_name, "__current-page");
                $p_class = $this->getHTMLClass($html_class_name, "__current-page-number");
                $html_pages .= "\t<li" . $li_class . ">\n\t\t<p" . $p_class . ">" . $i . "</p>\n\t</li>\n"; 
            } else {
                $li_class = $this->getHTMLClass($html_class_name, "__page");
                $a_class = $this->getHTMLClass($html_class_name, "__link");
                $html_pages .= "\t<li" . $li_class . ">\n\t\t<a href=\"" . $link . "?page=" . $i . "\"" . ($a_class? $a_class : "") . ">" . $i . "</a>\n\t</li>\n"; 
            }
            
        }

        // Добавить стрелку, если страница не последняя
        if ($this->page !== $this->page_count) {
            $last_li_class = $this->getHTMLClass($html_class_name, "__next-page", $html_class_name . "__page");
            $last_a_class = $this->getHTMLClass($html_class_name, "__next-link");
            $html_pages .= "\t<li" . $last_li_class . ">\n\t\t<a href=\"" . $link . "?page=" . $this->page + 1 . "\"" . $last_a_class . "></a>\n\t</li>\n";
        }

        $ul_class = $html_class_name? " class=\"" . $html_class_name . "\"" : "";

        return "<ul" . $ul_class . ">\n" . $html_pages . "</ul>\n";
    }

    /**
     * Установить количество страниц
     * @return void
     */
    private function setPageCount(): void
    {
        $this->page_count = (int)ceil($this->count / $this->per_page);
    }

    /**
     * Устанавливает класс для HTML-элементов
     * @param string $html_class_name
     * @param string $postfix
     * @param string $main_class
     * @return string
     */
    private function getHTMLClass(string $html_class_name = '', string $postfix = '', string $main_class = ''): string
    {
        if ($main_class) {
            $main_class .= " ";
        }
        return $html_class_name? " class=\"" . $main_class . $html_class_name . $postfix . "\"" : "";
    }
}