<?php class Paginator { public $n_rows; public $n_pages; public $page_len; public $cur_page; public $cur_start; public $max_extend; public $table; public function __construct($config) { if (isset($config['data'])) { $this->n_pages = 1; $this->cur_page = 1; $this->cur_start = 0; $this->table = $config['data']; } elseif (!isset($config['echo_full'])) { $table = $config['table_name']; if (isset($config['pagination_table'])) { $table = $config['pagination_table']; } $this->n_rows = DB::selectCount("select count(*) from {$table} where {$config['cond']}"); $this->page_len = isset($config['page_len']) ? $config['page_len'] : 10; $this->n_pages = max((int)ceil($this->n_rows / $this->page_len), 1); $this->cur_page = validateUInt($_GET['page']) ? (int)$_GET['page'] : 1; if ($this->cur_page < 1) { $this->cur_page = 1; } elseif ($this->cur_page > $this->n_pages) { $this->cur_page = $this->n_pages; } $this->cur_start = ($this->cur_page - 1) * $this->page_len; $this->table = DB::selectAll("select ".join($config['col_names'], ',')." from {$config['table_name']} where {$config['cond']} {$config['tail']} limit {$this->cur_start}, {$this->page_len}"); } else { $this->n_pages = 1; $this->cur_page = 1; $this->cur_start = ($this->cur_page - 1) * $this->page_len; $this->table = DB::selectAll("select ".join($config['col_names'], ',')." from {$config['table_name']} where {$config['cond']} {$config['tail']}"); } $this->max_extend = isset($config['max_extend']) ? (int)$config['max_extend'] : 5; } public function getPageRawUri($page) { $path = strtok($_SERVER["REQUEST_URI"], '?'); $query_string = strtok('?'); parse_str($query_string, $param); $param['page'] = $page; if ($page == 1) { unset($param['page']); } if ($param) { return $path . '?' . http_build_query($param); } else { return $path; } } public function getPageUri($page) { return HTML::escape($this->getPageRawUri($page)); } public function get() { $cur_idx = $this->cur_start + 1; foreach ($this->table as $idx => $row) { yield $cur_idx++ => $row; } } public function isEmpty() { return empty($this->table); } public function pagination() { if ($this->n_pages == 1) { return ''; } $html = '<ul class="pagination top-buffer-no bot-buffer-sm justify-content-center">'; if ($this->cur_page > 1) { $html .= '<li class="page-item"><a class="page-link" href="'.$this->getPageUri(1).'"><span class="glyphicon glyphicon glyphicon-fast-backward"></span></a></li>'; $html .= '<li class="page-item"><a class="page-link" href="'.$this->getPageUri($this->cur_page - 1).'"><span class="glyphicon glyphicon glyphicon-backward"></span></a></li>'; } else { $html .= '<li class="page-item disabled"><a class="page-link"><span class="glyphicon glyphicon glyphicon-fast-backward"></span></a></li>'; $html .= '<li class="page-item disabled"><a class="page-link"><span class="glyphicon glyphicon glyphicon-backward"></span></a></li>'; } for ($i = max($this->cur_page - $this->max_extend, 1); $i <= min($this->cur_page + $this->max_extend, $this->n_pages); $i++) { if ($i == $this->cur_page) { $html .= '<li class="page-item active"><a class="page-link" href="'.$this->getPageUri($i).'">'.$i.'</a></li>'; } else { $html .= '<li class="page-item"><a class="page-link" href="'.$this->getPageUri($i).'">'.$i.'</a></li>'; } } if ($this->cur_page < $this->n_pages) { $html .= '<li class="page-item"><a class="page-link" href="'.$this->getPageUri($this->cur_page + 1).'"><span class="glyphicon glyphicon glyphicon-forward"></span></a></li>'; $html .= '<li class="page-item"><a class="page-link" href="'.$this->getPageUri($this->n_pages).'"><span class="glyphicon glyphicon glyphicon-fast-forward"></span></a></li>'; } else { $html .= '<li class="page-item disabled"><a class="page-link"><span class="glyphicon glyphicon glyphicon-forward"></span></a></li>'; $html .= '<li class="page-item disabled"><a class="page-link"><span class="glyphicon glyphicon glyphicon-fast-forward"></span></a></li>'; } $html .= '</ul>'; return $html; } }