mirror of
https://github.com/renbaoshuo/S2OJ.git
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97 lines
3.1 KiB
PHP
97 lines
3.1 KiB
PHP
<?php
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class Paginator {
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public $n_rows;
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public $n_pages;
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public $page_len;
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public $cur_page;
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public $cur_start;
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public $max_extend;
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public $table;
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public function __construct($config) {
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if (!isset($config['echo_full'])) {
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$this->n_rows = DB::selectCount("select count(*) from {$config['table_name']} where {$config['cond']}");
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$this->page_len = isset($config['page_len']) ? $config['page_len'] : 10;
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$this->n_pages = max((int)ceil($this->n_rows / $this->page_len), 1);
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$this->cur_page = validateUInt($_GET['page']) ? (int)$_GET['page'] : 1;
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if ($this->cur_page < 1) {
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$this->cur_page = 1;
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} else if ($this->cur_page > $this->n_pages) {
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$this->cur_page = $this->n_pages;
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}
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$this->cur_start = ($this->cur_page - 1) * $this->page_len;
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$this->table = DB::selectAll("select ".join($config['col_names'], ',')." from {$config['table_name']} where {$config['cond']} {$config['tail']} limit {$this->cur_start}, {$this->page_len}");
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} else {
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$this->n_pages = 1;
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$this->cur_page = 1;
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$this->cur_start = ($this->cur_page - 1) * $this->page_len;
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$this->table = DB::selectAll("select ".join($config['col_names'], ',')." from {$config['table_name']} where {$config['cond']} {$config['tail']}");
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}
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$this->max_extend = isset($config['max_extend']) ? (int)$config['max_extend'] : 5;
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}
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public function getPageRawUri($page) {
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$path = strtok($_SERVER["REQUEST_URI"], '?');
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$query_string = strtok('?');
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parse_str($query_string, $param);
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$param['page'] = $page;
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if ($page == 1)
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unset($param['page']);
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if ($param) {
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return $path . '?' . http_build_query($param);
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} else {
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return $path;
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}
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}
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public function getPageUri($page) {
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return HTML::escape($this->getPageRawUri($page));
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}
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public function get() {
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$cur_idx = $this->cur_start + 1;
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foreach ($this->table as $idx => $row) {
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yield $cur_idx++ => $row;
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}
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}
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public function isEmpty() {
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return empty($this->table);
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}
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public function pagination() {
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if ($this->n_pages == 1) {
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return '';
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}
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$html = '<div class="text-center">';
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$html .= '<ul class="pagination top-buffer-no bot-buffer-sm">';
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if ($this->cur_page > 1) {
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$html .= '<li><a href="'.$this->getPageUri($this->cur_page - 1).'"><span class="glyphicon glyphicon glyphicon-backward"></span></a></li>';
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} else {
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$html .= '<li class="disabled"><a><span class="glyphicon glyphicon glyphicon-backward"></span></a></li>';
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}
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for ($i = max($this->cur_page - $this->max_extend, 1); $i <= min($this->cur_page + $this->max_extend, $this->n_pages); $i++) {
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if ($i == $this->cur_page) {
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$html .= '<li class="active"><a href="'.$this->getPageUri($i).'">'.$i.'</a></li>';
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} else {
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$html .= '<li><a href="'.$this->getPageUri($i).'">'.$i.'</a></li>';
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}
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}
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if ($this->cur_page < $this->n_pages) {
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$html .= '<li><a href="'.$this->getPageUri($this->cur_page + 1).'"><span class="glyphicon glyphicon glyphicon-forward"></span></a></li>';
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} else {
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$html .= '<li class="disabled"><a><span class="glyphicon glyphicon glyphicon-forward"></span></a></li>';
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}
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$html .= '</ul>';
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$html .= '</div>';
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return $html;
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}
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}
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