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< ? 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 ) {
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if ( isset ( $config [ 'data' ])) {
$this -> n_pages = 1 ;
$this -> cur_page = 1 ;
$this -> cur_start = 0 ;
$this -> table = $config [ 'data' ];
} elseif ( ! isset ( $config [ 'echo_full' ])) {
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$this -> n_rows = DB :: selectCount ( " select count(*) from { $config [ 'table_name' ] } 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 ;
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} elseif ( $this -> cur_page > $this -> n_pages ) {
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$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 ;
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if ( $page == 1 ) {
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unset ( $param [ 'page' ]);
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}
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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 ( $this -> n_pages == 1 ) {
return '' ;
}
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$html = '<ul class="pagination top-buffer-no bot-buffer-sm justify-content-center">' ;
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if ( $this -> cur_page > 1 ) {
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$html .= '<li class="page-item"><a class="page-link" href="' . $this -> getPageUri ( 1 ) . '"><span class="glyphicon glyphicon glyphicon-fast-backward"></span></a></li>' ;
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$html .= '<li class="page-item"><a class="page-link" href="' . $this -> getPageUri ( $this -> cur_page - 1 ) . '"><span class="glyphicon glyphicon glyphicon-backward"></span></a></li>' ;
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} else {
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$html .= '<li class="page-item disabled"><a class="page-link"><span class="glyphicon glyphicon glyphicon-fast-backward"></span></a></li>' ;
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$html .= '<li class="page-item disabled"><a class="page-link"><span class="glyphicon glyphicon glyphicon-backward"></span></a></li>' ;
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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 ++ ) {
if ( $i == $this -> cur_page ) {
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$html .= '<li class="page-item active"><a class="page-link" href="' . $this -> getPageUri ( $i ) . '">' . $i . '</a></li>' ;
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} else {
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$html .= '<li class="page-item"><a class="page-link" href="' . $this -> getPageUri ( $i ) . '">' . $i . '</a></li>' ;
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}
}
if ( $this -> cur_page < $this -> n_pages ) {
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$html .= '<li class="page-item"><a class="page-link" href="' . $this -> getPageUri ( $this -> cur_page + 1 ) . '"><span class="glyphicon glyphicon glyphicon-forward"></span></a></li>' ;
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$html .= '<li class="page-item"><a class="page-link" href="' . $this -> getPageUri ( $this -> n_pages ) . '"><span class="glyphicon glyphicon glyphicon-fast-forward"></span></a></li>' ;
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} else {
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$html .= '<li class="page-item disabled"><a class="page-link"><span class="glyphicon glyphicon glyphicon-forward"></span></a></li>' ;
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$html .= '<li class="page-item disabled"><a class="page-link"><span class="glyphicon glyphicon glyphicon-fast-forward"></span></a></li>' ;
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}
$html .= '</ul>' ;
return $html ;
}
}