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288 lines
10 KiB
288 lines
10 KiB
<?php
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/* For licensing terms, see /license.txt */
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/**
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* This is a library with some functions to sort tabular data
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*
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* @package chamilo.library
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*/
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/**
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* Code
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*/
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define('SORT_DATE', 3);
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define('SORT_IMAGE', 4);
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/**
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* @package chamilo.library
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*/
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class TableSort
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{
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/**
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* Sorts 2-dimensional table.
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* @param array $data The data to be sorted.
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* @param int $column The column on which the data should be sorted (default = 0)
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* @param int $direction The direction to sort (SORT_ASC (default) or SORT_DESC)
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* @param int $type How should data be sorted (SORT_REGULAR, SORT_NUMERIC,
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* SORT_STRING,SORT_DATE,SORT_IMAGE)
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* @return array The sorted dataset
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* @author bart.mollet@hogent.be
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*/
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public static function sort_table($data, $column = 0, $direction = SORT_ASC, $type = SORT_REGULAR)
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{
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if (!is_array($data) || empty($data)) {
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return array();
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}
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if ($column != strval(intval($column))) {
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// Probably an attack
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return $data;
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}
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if (!in_array($direction, array(SORT_ASC, SORT_DESC))) {
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// Probably an attack
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return $data;
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}
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if ($type == SORT_REGULAR) {
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if (TableSort::is_image_column($data, $column)) {
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$type = SORT_IMAGE;
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} elseif (TableSort::is_date_column($data, $column)) {
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$type = SORT_DATE;
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} elseif (TableSort::is_numeric_column($data, $column)) {
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$type = SORT_NUMERIC;
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} else {
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$type = SORT_STRING;
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}
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}
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$compare_operator = $direction == SORT_ASC ? '>' : '<=';
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switch ($type) {
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case SORT_NUMERIC:
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$compare_function = 'return strip_tags($a['.$column.']) '.$compare_operator.' strip_tags($b['.$column.']);';
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break;
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case SORT_IMAGE:
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$compare_function = 'return api_strnatcmp(api_strtolower(strip_tags($a['.$column.'], "<img>")), api_strtolower(strip_tags($b['.$column.'], "<img>"))) '.$compare_operator.' 0;';
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break;
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case SORT_DATE:
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$compare_function = 'return strtotime(strip_tags($a['.$column.'])) '.$compare_operator.' strtotime(strip_tags($b['.$column.']));';
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break;
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case SORT_STRING:
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default:
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$compare_function = 'return api_strnatcmp(api_strtolower(strip_tags($a['.$column.'])), api_strtolower(strip_tags($b['.$column.']))) '.$compare_operator.' 0;';
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break;
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}
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// Sort the content
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usort($data, create_function('$a, $b', $compare_function));
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return $data;
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}
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/**
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* Sorts 2-dimensional table. It is possile changing the columns that will be shown and the way that the columns are to be sorted.
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* @param array $data The data to be sorted.
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* @param int $column The column on which the data should be sorted (default = 0)
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* @param string $direction The direction to sort (SORT_ASC (default) orSORT_DESC)
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* @param array $column_show The columns that we will show in the table i.e: $column_show = array('1','0','1') we will show the 1st and the 3th column.
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* @param array $column_order Changes how the columns will be sorted ie. $column_order = array('0','3','2','3') The column [1] will be sorted like the column [3]
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* @param constant $type How should data be sorted (SORT_REGULAR, SORT_NUMERIC, SORT_STRING, SORT_DATE, SORT_IMAGE)
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* @return array The sorted dataset
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* @author bart.mollet@hogent.be
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*/
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public static function sort_table_config(
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$data,
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$column = 0,
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$direction = SORT_ASC,
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$column_show = null,
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$column_order = null,
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$type = SORT_REGULAR,
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$doc_filter = false
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) {
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if (!is_array($data) || empty($data)) {
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return array();
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}
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if ($column != strval(intval($column))) {
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// Probably an attack
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return $data;
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}
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if (!in_array($direction, array(SORT_ASC, SORT_DESC))) {
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// Probably an attack
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return $data;
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}
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// Change columns sort
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// Here we say that the real way of how the columns are going to be order is manage by the $column_order array
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if (is_array($column_order)) {
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$column = isset($column_order[$column]) ? $column_order[$column] : $column;
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}
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if ($type == SORT_REGULAR) {
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if (TableSort::is_image_column($data, $column)) {
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$type = SORT_IMAGE;
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} elseif (TableSort::is_date_column($data, $column)) {
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$type = SORT_DATE;
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} elseif (TableSort::is_numeric_column($data, $column)) {
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$type = SORT_NUMERIC;
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} else {
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$type = SORT_STRING;
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}
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}
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//This fixes only works in the document tool when ordering by name
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if ($doc_filter && in_array($type, array(SORT_STRING))) {
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$folder_to_sort = array();
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$new_data = array();
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if (!empty($data)) {
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foreach ($data as $document) {
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if ($document['type'] == 'folder') {
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$docs_to_sort[$document['id']] = api_strtolower($document['name']);
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} else {
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$folder_to_sort[$document['id']] = api_strtolower($document['name']);
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}
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$new_data[$document['id']] = $document;
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}
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if ($direction == SORT_ASC) {
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if (!empty($docs_to_sort)) {
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api_natsort($docs_to_sort);
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}
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if (!empty($folder_to_sort)) {
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api_natsort($folder_to_sort);
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}
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} else {
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if (!empty($docs_to_sort)) {
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api_natrsort($docs_to_sort);
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}
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if (!empty($folder_to_sort)) {
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api_natrsort($folder_to_sort);
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}
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}
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$new_data_order = array();
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if (!empty($docs_to_sort)) {
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foreach($docs_to_sort as $id => $document) {
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if (isset($new_data[$id])) {
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$new_data_order[] = $new_data[$id];
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}
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}
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}
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if (!empty($folder_to_sort)) {
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foreach($folder_to_sort as $id => $document) {
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if (isset($new_data[$id])) {
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$new_data_order[] = $new_data[$id];
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}
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}
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}
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$data = $new_data_order;
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}
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} else {
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$compare_operator = $direction == SORT_ASC ? '>' : '<=';
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switch ($type) {
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case SORT_NUMERIC:
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$compare_function = 'return strip_tags($a['.$column.']) '.$compare_operator.' strip_tags($b['.$column.']);';
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break;
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case SORT_IMAGE:
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$compare_function = 'return api_strnatcmp(api_strtolower(strip_tags($a['.$column.'], "<img>")), api_strtolower(strip_tags($b['.$column.'], "<img>"))) '.$compare_operator.' 0;';
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break;
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case SORT_DATE:
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$compare_function = 'return strtotime(strip_tags($a['.$column.'])) '.$compare_operator.' strtotime(strip_tags($b['.$column.']));';
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break;
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case SORT_STRING:
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default:
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$compare_function = 'return api_strnatcmp(api_strtolower(strip_tags($a['.$column.'])), api_strtolower(strip_tags($b['.$column.']))) '.$compare_operator.' 0;';
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break;
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}
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// Sort the content
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usort($data, create_function('$a, $b', $compare_function));
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}
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if (is_array($column_show) && !empty($column_show)) {
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// We show only the columns data that were set up on the $column_show array
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$new_order_data = array();
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$count_data = count($data);
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$count_column_show = count($column_show);
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for ($j = 0; $j < $count_data; $j++) {
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$k = 0;
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for ($i = 0; $i < $count_column_show; $i++) {
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if ($column_show[$i]) {
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$new_order_data[$j][$k] = $data[$j][$i];
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}
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$k++;
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}
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}
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// Replace the multi-arrays
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$data = $new_order_data;
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}
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return $data;
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}
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/**
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* Checks whether a column of a 2D-array contains only numeric values
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* @param array $data The data-array
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* @param int $column The index of the column to check
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* @return bool TRUE if column contains only dates, FALSE otherwise
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* @todo Take locale into account (eg decimal point or comma ?)
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* @author bart.mollet@hogent.be
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*/
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private static function is_numeric_column(& $data, $column)
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{
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$is_numeric = true;
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foreach ($data as $index => & $row) {
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$is_numeric &= is_numeric(strip_tags($row[$column]));
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if (!$is_numeric) {
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break;
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}
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}
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return $is_numeric;
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}
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/**
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* Checks whether a column of a 2D-array contains only dates (GNU date syntax)
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* @param array $data The data-array
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* @param int $column The index of the column to check
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* @return bool TRUE if column contains only dates, FALSE otherwise
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* @author bart.mollet@hogent.be
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*/
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private static function is_date_column(& $data, $column)
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{
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$is_date = true;
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foreach ($data as $index => & $row) {
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if (strlen(strip_tags($row[$column])) != 0) {
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$check_date = strtotime(strip_tags($row[$column]));
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// strtotime Returns a timestamp on success, FALSE otherwise.
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// Previous to PHP 5.1.0, this function would return -1 on failure.
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$is_date &= ($check_date != -1 && $check_date);
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} else {
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$is_date &= false;
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}
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if (!$is_date) {
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break;
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}
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}
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return $is_date;
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}
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/**
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* Checks whether a column of a 2D-array contains only images (<img src="path/file.ext" alt=".."/>)
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* @param array $data The data-array
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* @param int $column The index of the column to check
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* @return bool TRUE if column contains only images, FALSE otherwise
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* @author bart.mollet@hogent.be
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*/
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private static function is_image_column(& $data, $column)
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{
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$is_image = true;
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foreach ($data as $index => & $row) {
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$is_image &= strlen(trim(strip_tags($row[$column], '<img>'))) > 0; // at least one img-tag
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$is_image &= strlen(trim(strip_tags($row[$column]))) == 0; // and no text outside attribute-values
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if (!$is_image) {
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break;
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}
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}
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return $is_image;
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}
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}
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