$maxPage]);
}
public static function pageSizeSelectBox($default_size = 15) {
$html = [""];
$final_list = static::getPageSizes();
foreach ($final_list as $item) {
$is_selected = ($default_size == $item['size']) ? "selected" : "";
$html[] = "". $item['name'] ." ";
}
$html[] = " ";
return join("", $html);
}
//allow to select pageSize
public static function getPageSizes() {
$sizes = [15, 30, 50];
$final_list = [];
foreach ($sizes as $size) {
$final_list[] = [
"size" => $size,
"name" => $size . "/ trang",
"url" => Url::buildUrl($_SERVER['REQUEST_URI'], ["page" => '', "pageSize" => $size])
];
}
return $final_list;
}
//Function nhay trang paging
public static function pagingAjax($totalResults,$numPerRow,$currentURL,$maxPageDisplay,$holder_id){
$currentPage = isset($_GET["page"]) ? (int) $_GET["page"] : 1;
$currentURL = str_replace(array("?page=".$currentPage, "&page=".$currentPage),"",$currentURL);
if(strpos($currentURL, "?") !== false) $currentURL .= "&";
else $currentURL .= "?";
$maxPage = ceil($totalResults/$numPerRow);
//max page to see : 20
$maxPage = ($maxPage > 50) ? 50 : $maxPage;
if($maxPage==1) return "";
$farLeft ="... ";
$farRight ="... ";
$link ="";
//$maxPageDisplay la so page se hien ra, thuong lay 7
if($currentPage > 1) $link .= "<< Xem $i $i >> $i $i ".$maxPage." >> 1 $i $i ".$maxPage." >> 1 $i $i
";
//Lua chon hien thi, phai it nhat tu 2 trang tro len moi hien ra
if($maxPage>1){
return $link;
}
return false;
}
// 04-Sept-2020
public static function paging_template($totalResults, $numPerRow, $currentURL = '', $maxPageDisplay = 7){
// parameter variables
if(!$currentURL) $currentURL = $_SERVER['REQUEST_URI'];
$url_parts = self::destructUrlWithCustomPageParam($currentURL);
/*[
'path' => $url_path,
'query' => $query_params,
'page' => $current_page,
];*/
$query_without_page = $url_parts['query'];
$current_page = (isset($url_parts['page']) && $url_parts['page']) ? intval($url_parts['page']) : 1;
$total_pages = ceil($totalResults / $numPerRow);
$page_space = ceil(($maxPageDisplay - 1) / 2);
if($current_page > $total_pages) $current_page = $total_pages;
/*
* $current_page is expected to be always in the middle:
* 3 = $page_space = ( $maxPageDisplay = 7-1/2)
* if current_page = 4 -> expect start = 4-3 = 1, expect end = 4+3 = 7
* if current_page = 2 -> expect start = 2-3 = -1, expect end = 2+3 = 5. Since -1 is not valid, we need to add 2 to make it at least 1, so the end need to add 2 as well, so the result is: start = 1, end = 7
* if current_page = 6 -> expect start = 6-3 = 3, expect end = 6+3 = 9. if max page =8, the end need to offset 9-8 = 1, so the start also need to offset 1, the result: start=3-1 = 2, end=9-1=8
* */
// expect result
$start_index = $current_page - $page_space;
$end_index = $current_page + $page_space;
//calculate offset
if($start_index < 1) {
$offset = 1 - $start_index;
$start_index = 1;
$end_index += $offset;
if($end_index > $total_pages) $end_index = $total_pages;
}else if($end_index > $total_pages) {
$offset = $end_index - $total_pages;
$end_index = $total_pages;
$start_index -= $offset;
if($start_index < 1) $start_index = 1;
}
$page_collection = [];
$build_table = [];
// add prev
if($start_index > 1) {
$query_without_page['page'] = $current_page-1;
$url = self::buildUrlWithCustomPageParam($url_parts['path'], $query_without_page);
$build_table[] = " << ".$i." ".$i." >> ',
join('', $build_table) ,
"
"
]) ;
return array($page_collection, $tb_page, $total_pages);
}
return array([], '', 1);
}
// Url with page parameter format
// default: domain/path?key1=value1&key2=value2&page=1|2|3...
// custom1: domain/path/1|2|3/?key1=value1&key2=value2
public static function buildUrlWithCustomPageParam($url_path, array $params){
$url_format_type = self::getUrlWithCustomPageFormat();
$params_without_page = $params;
$page_number = 1;
if(isset($params['page'])) {
$page_number = intval($params['page']);
unset($params_without_page['page']);
}
// custom1 (use case: hanoicomputer.vn)
if($url_format_type == 'custom1') {
if($page_number > 1){
$url_path = $url_path."/".$page_number."/";
}
}else{
// default
if($page_number > 1){
// push page to the end, always
$params_without_page['page'] = $page_number;
}
}
if(sizeof($params_without_page)) {
return join("", [$url_path, "?", http_build_query($params_without_page)]);
}
return $url_path;
}
// destruct Url to get url_path and query params
public static function destructUrlWithCustomPageParam($full_url){
$cache_key = md5($full_url);
$cached_value = self::getCache($cache_key);
// if in cache, get right away
if($cached_value) return $cached_value;
// not in cache, build and set cache
$url_format_type = self::getUrlWithCustomPageFormat();
// destruct
$parsed_url = explode("?", $full_url);
$url_path = isset($parsed_url[0]) ? $parsed_url[0] : '';
$query_part = isset($parsed_url[1]) ? $parsed_url[1] : '';
$query_params = [];
$current_page = 1;
if($query_part) {
parse_str($query_part, $query_params);
}
// custom1: url format= domain/path/1|2|3/?key1=value1&key2=value2
if($url_format_type == 'custom1') {
$match = [];
if(preg_match("{/(.*?)/([0-9]+)/$}", $url_path, $match)){
if(isset($match[2]) && $match[2] > 1) $current_page = $match[2];
$url_path = "/".$match[1];
}
} else {
// default
if(isset($query_params['page'])) {
$current_page = $query_params['page'];
unset($query_params['page']);
}
}
$cached_value = [
'path' => $url_path,
'query' => $query_params,
'page' => $current_page,
];
self::setCache($cache_key, $cached_value);
return $cached_value;
}
// check if user in in the admin panel
protected static function is_in_admin(){
return substr($_SERVER['REQUEST_URI'], 0, 7) == '/admin/';
}
// Url with page parameter format
// default: domain/path?key1=value1&key2=value2&page=1|2|3...
// custom1: domain/path/1|2|3/?key1=value1&key2=value2
protected static function getUrlWithCustomPageFormat() {
$url_format_type = "default";
// keep default for admin panel
if(self::is_in_admin()) {
return $url_format_type;
}
// or search page
if(substr($_SERVER['REQUEST_URI'], 0, 4) == '/tim') {
return $url_format_type;
}
if(defined("URL_PAGING_FORMAT") && URL_PAGING_FORMAT) {
$url_format_type = URL_PAGING_FORMAT;
}
return $url_format_type;
}
protected static function getCache($key) {
return isset(self::$cache[$key]) ? unserialize(self::$cache[$key]) : null;
}
protected static function setCache($key, $value) {
self::$cache[$key] = serialize($value);
}
//Function nhay trang
public static function paging($totalResults, $numPerRow, $currentURL, $maxPageDisplay, $limitPage = 50){
$currentPage = isset($_GET["page"]) ? (int) $_GET["page"] : 1;
$currentURL = str_replace(array("?page=".$currentPage, "&page=".$currentPage),"",$currentURL);
//build_url($currentURL, array("page"=>''));
$first_url = $currentURL; //when $page=1
if(strpos($currentURL, "?") !== false) $currentURL .= "&";
else $currentURL .= "?";
$maxPage = ceil($totalResults/$numPerRow);
//max page to see : 20
if($limitPage > 0){
$maxPage = ($maxPage > $limitPage) ? $limitPage : $maxPage;
}
if($maxPage==1) return "";
$farLeft ="... ";
$farRight ="... ";
$link ="";
//$maxPageDisplay la so page se hien ra, thuong lay 7
if($currentPage == 2) $link .= "Quay lại Quay lại Xem trang $i $i $i Tiếp theo $i $i $i ".$maxPage." Tiếp theo 1 $i $i ".$maxPage." Tiếp theo 1 $i $i
";
//Lua chon hien thi, phai it nhat tu 2 trang tro len moi hien ra
if($maxPage > 1){
return $link;
}
return false;
}
}