File: /home/jairicem/alfijiri.com/app/libraries/Datatables.php
<?php
if (!defined('BASEPATH')) {
exit('No direct script access allowed');
}
class Datatables
{
private $add_columns = [];
private $ci;
private $columns = [];
private $distinct;
private $edit_columns = [];
private $filter = [];
private $group_by = [];
private $joins = [];
private $like = [];
private $or_where = [];
private $select = [];
private $table;
private $unset_columns = [];
private $where = [];
private $natural_sort_columns = [];
/**
* Copies an instance of CI
*/
public function __construct()
{
$this->ci = &get_instance();
}
/**
* Sets additional column variables for adding custom columns
*
* @param string $column
* @param string $content
* @param string $match_replacement
* @return mixed
*/
public function add_column($column, $content, $match_replacement = null)
{
$this->add_columns[$column] = ['content' => $content, 'replacement' => $this->explode(',', $match_replacement)];
return $this;
}
public function natural_sort($column)
{
$this->natural_sort_columns[] = $column;
return $this;
}
/**
* Generates the DISTINCT portion of the query
*
* @param string $column
* @return mixed
*/
public function distinct($column)
{
$this->distinct = $column;
$this->ci->db->distinct($column);
return $this;
}
/**
* Sets additional column variables for editing columns
*
* @param string $column
* @param string $content
* @param string $match_replacement
* @return mixed
*/
public function edit_column($column, $content, $match_replacement)
{
$this->edit_columns[$column][] = ['content' => $content, 'replacement' => $this->explode(',', $match_replacement)];
return $this;
}
/**
* Generates the WHERE portion of the query
*
* @param mixed $key_condition
* @param string $val
* @param bool $backtick_protect
* @return mixed
*/
public function filter($key_condition, $val = null, $backtick_protect = true)
{
$this->filter[] = [$key_condition, $val, $backtick_protect];
return $this;
}
/**
* Generates the FROM portion of the query
*
* @param string $table
* @return mixed
*/
public function from($table)
{
$this->table = $table;
return $this;
}
/**
* Builds all the necessary query segments and performs the main query based on results set from chained statements
*
* @param string $output
* @param string $charset
* @return string
*/
public function generate($output = 'json', $charset = 'UTF-8')
{
if (strtolower($output) == 'json') {
$this->get_paging();
}
$this->get_ordering();
$this->get_filtering();
return $this->produce_output(strtolower($output), strtolower($charset));
}
/**
* Generates a custom GROUP BY portion of the query
*
* @param string $val
* @return mixed
*/
public function group_by($val)
{
$this->group_by[] = $val;
$this->ci->db->group_by($val);
return $this;
}
public function group_end()
{
$this->ci->db->group_end();
return $this;
}
public function group_start()
{
$this->ci->db->group_start();
return $this;
}
/**
* Generates the JOIN portion of the query
*
* @param string $table
* @param string $fk
* @param string $type
* @return mixed
*/
public function join($table, $fk, $type = null)
{
$this->joins[] = [$table, $fk, $type];
$this->ci->db->join($table, $fk, $type);
return $this;
}
/**
* Generates a %LIKE% portion of the query
*
* @param mixed $key_condition
* @param string $val
* @param bool $backtick_protect
* @return mixed
*/
public function like($key_condition, $val = null, $backtick_protect = true)
{
$this->like[] = [$key_condition, $val, $backtick_protect];
$this->ci->db->like($key_condition, $val, $backtick_protect);
return $this;
}
/**
* Generates the WHERE portion of the query
*
* @param mixed $key_condition
* @param string $val
* @param bool $backtick_protect
* @return mixed
*/
public function or_where($key_condition, $val = null, $backtick_protect = true)
{
$this->or_where[] = [$key_condition, $val, $backtick_protect];
$this->ci->db->or_where($key_condition, $val, $backtick_protect);
return $this;
}
/**
* Generates the SELECT portion of the query
*
* @param string $columns
* @param bool $backtick_protect
* @return mixed
*/
public function select($columns, $backtick_protect = true)
{
foreach ($this->explode(',', $columns) as $val) {
$column = trim(preg_replace('/(.*)\s+as\s+(\w*)/i', '$2', $val));
$this->columns[] = $column;
$this->select[$column] = trim(preg_replace('/(.*)\s+as\s+(\w*)/i', '$1', $val));
}
$this->ci->db->select($columns, $backtick_protect);
return $this;
}
/**
* If you establish multiple databases in config/database.php this will allow you to
* set the database (other than $active_group) - more info: http://ellislab.com/forums/viewthread/145901/#712942
*/
public function set_database($db_name)
{
$db_data = $this->ci->load->database($db_name, true);
$this->ci->db = $db_data;
}
/**
* Unset column
*
* @param string $column
* @return mixed
*/
public function unset_column($column)
{
$column = explode(',', $column);
$this->unset_columns = array_merge($this->unset_columns, $column);
return $this;
}
/**
* Generates the WHERE portion of the query
*
* @param mixed $key_condition
* @param string $val
* @param bool $backtick_protect
* @return mixed
*/
public function where($key_condition, $val = null, $backtick_protect = true)
{
$this->where[] = [$key_condition, $val, $backtick_protect];
$this->ci->db->where($key_condition, $val, $backtick_protect);
return $this;
}
/**
* Return the difference of open and close characters
*
* @param string $str
* @param string $open
* @param string $close
* @return string $retval
*/
private function balanceChars($str, $open, $close)
{
$openCount = substr_count($str, $open);
$closeCount = substr_count($str, $close);
$retval = $openCount - $closeCount;
return $retval;
}
/**
* Check mDataprop
*
* @return bool
*/
private function check_mDataprop()
{
if (!$this->ci->input->post('mDataProp_0')) {
return false;
}
for ($i = 0; $i < intval($this->ci->input->post('iColumns')); $i++) {
if (!is_numeric($this->ci->input->post('mDataProp_' . $i))) {
return true;
}
}
return false;
}
/**
* Runs callback functions and makes replacements
*
* @param mixed $custom_val
* @param mixed $row_data
* @return string $custom_val['content']
*/
private function exec_replace($custom_val, $row_data)
{
$replace_string = '';
if (isset($custom_val['replacement']) && is_array($custom_val['replacement'])) {
foreach ($custom_val['replacement'] as $key => $val) {
$sval = preg_replace("/(?<!\w)([\'\"])(.*)\\1(?!\w)/i", '$2', trim($val));
if (preg_match('/(\w+::\w+|\w+)\((.*)\)/i', $val, $matches) && is_callable($matches[1])) {
$func = $matches[1];
$args = preg_split("/[\s,]*\\\"([^\\\"]+)\\\"[\s,]*|" . "[\s,]*'([^']+)'[\s,]*|" . '[,]+/', $matches[2], 0, PREG_SPLIT_NO_EMPTY | PREG_SPLIT_DELIM_CAPTURE);
foreach ($args as $args_key => $args_val) {
$args_val = preg_replace("/(?<!\w)([\'\"])(.*)\\1(?!\w)/i", '$2', trim($args_val));
$args[$args_key] = (in_array($args_val, $this->columns)) ? ($row_data[($this->check_mDataprop()) ? $args_val : array_search($args_val, $this->columns)]) : $args_val;
}
$replace_string = call_user_func_array($func, $args);
} elseif (in_array($sval, $this->columns)) {
$replace_string = $row_data[($this->check_mDataprop()) ? $sval : array_search($sval, $this->columns)];
} else {
$replace_string = $sval;
}
$custom_val['content'] = str_ireplace('$' . ($key + 1), $replace_string, $custom_val['content']);
}
}
return $custom_val['content'];
}
/**
* Explode, but ignore delimiter until closing characters are found
*
* @param string $delimiter
* @param string $str
* @param string $open
* @param string $close
* @return mixed $retval
*/
private function explode($delimiter, $str, $open = '(', $close = ')')
{
$retval = [];
$hold = [];
$balance = 0;
$parts = explode($delimiter, $str);
foreach ($parts as $part) {
$hold[] = $part;
$balance += $this->balanceChars($part, $open, $close);
if ($balance < 1) {
$retval[] = implode($delimiter, $hold);
$hold = [];
$balance = 0;
}
}
if (count($hold) > 0) {
$retval[] = implode($delimiter, $hold);
}
return $retval;
}
/**
* Compiles the select statement based on the other functions called and runs the query
*
* @return mixed
*/
private function get_display_result()
{
return $this->ci->db->get($this->table);
}
/**
* Generates a %LIKE% portion of the query
*
* @return mixed
*/
private function get_filtering()
{
if ($this->check_mDataprop()) {
$mColArray = $this->get_mDataprop();
} elseif ($this->ci->input->post('sColumns')) {
$mColArray = explode(',', $this->ci->input->post('sColumns'));
} else {
$mColArray = $this->columns;
}
$sWhere = '';
$sSearch = $this->ci->db->escape_like_str($this->ci->input->post('sSearch'));
$mColArray = array_values(array_diff($mColArray, $this->unset_columns));
$columns = array_values(array_diff($this->columns, $this->unset_columns));
if ($sSearch != '') {
for ($i = 0; $i < count($mColArray); $i++) {
if ($this->ci->input->post('bSearchable_' . $i) == 'true' && in_array($mColArray[$i], $columns)) {
$sWhere .= $this->select[$mColArray[$i]] . " LIKE '%" . $sSearch . "%' OR ";
}
}
}
$sWhere = substr_replace($sWhere, '', -3);
if ($sWhere != '') {
$this->ci->db->where('(' . $sWhere . ')');
}
$sRangeSeparator = $this->ci->input->post('sRangeSeparator');
for ($i = 0; $i < intval($this->ci->input->post('iColumns')); $i++) {
if (isset($_POST['sSearch_' . $i]) && $this->ci->input->post('sSearch_' . $i) != '' && in_array($mColArray[$i], $columns)) {
$miSearch = explode(',', $this->ci->input->post('sSearch_' . $i));
foreach ($miSearch as $val) {
if (preg_match("/(<=|>=|=|<|>)(\s*)(.+)/i", trim($val), $matches)) {
$this->ci->db->where($this->select[$mColArray[$i]] . ' ' . $matches[1], $matches[3]);
} elseif (!empty($sRangeSeparator) && preg_match("/(.*)$sRangeSeparator(.*)/i", trim($val), $matches)) {
$rangeQuery = '';
if (!empty($matches[1])) {
$rangeQuery = 'STR_TO_DATE(' . $this->select[$mColArray[$i]] . ",'%d/%m/%y %H:%i:%s') >= STR_TO_DATE('" . $matches[1] . " 00:00:00','%d/%m/%y %H:%i:%s')";
}
if (!empty($matches[2])) {
$rangeQuery .= (!empty($rangeQuery) ? ' AND ' : '') . 'STR_TO_DATE(' . $this->select[$mColArray[$i]] . ",'%d/%m/%y %H:%i:%s') <= STR_TO_DATE('" . $matches[2] . " 23:59:59','%d/%m/%y %H:%i:%s')";
}
if (!empty($matches[1]) || !empty($matches[2])) {
$this->ci->db->where($rangeQuery);
}
} else {
$this->ci->db->where($this->select[$mColArray[$i]] . ' LIKE', '%' . $val . '%');
}
}
}
}
foreach ($this->filter as $val) {
$this->ci->db->where($val[0], $val[1], $val[2]);
}
}
/**
* Get mDataprop order
*
* @return mixed
*/
private function get_mDataprop()
{
$mDataProp = [];
for ($i = 0; $i < intval($this->ci->input->post('iColumns')); $i++) {
$mDataProp[] = $this->ci->input->post('mDataProp_' . $i);
}
return $mDataProp;
}
/**
* Generates the ORDER BY portion of the query
*
* @return mixed
*/
private function get_ordering()
{
if ($this->check_mDataprop()) {
$mColArray = $this->get_mDataprop();
} elseif ($this->ci->input->post('sColumns')) {
$mColArray = explode(',', $this->ci->input->post('sColumns'));
} else {
$mColArray = $this->columns;
}
$mColArray = array_values(array_diff($mColArray, $this->unset_columns));
$columns = array_values(array_diff($this->columns, $this->unset_columns));
for ($i = 0; $i < intval($this->ci->input->post('iSortingCols')); $i++) {
if (isset($mColArray[intval($this->ci->input->post('iSortCol_' . $i))]) && in_array($mColArray[intval($this->ci->input->post('iSortCol_' . $i))], $columns) && $this->ci->input->post('bSortable_' . intval($this->ci->input->post('iSortCol_' . $i))) == 'true') {
$col = $mColArray[intval($this->ci->input->post('iSortCol_' . $i))];
$dir = $this->ci->input->post('sSortDir_' . $i);
$is_natural = false;
foreach ($this->natural_sort_columns as $nat_col) {
if ($col == $nat_col || strpos($col, '.' . $nat_col) !== false) {
$is_natural = true;
// Use the exact column name/alias from the select array if available, otherwise use $col
// Actually $col here is from $this->columns which comes from select(), so it should be the alias or column name
// But wait, $mColArray comes from get_mDataprop or sColumns.
// In get_filtering, $this->select[$mColArray[$i]] builds the query.
// Let's rely on $col handling by CodeIgniter but inject LENGTH() logic.
// We need to know the actual column string to wrap in LENGTH()
// If $col is an alias, we should ideally sort by the alias ? No, CI might not support function on alias in ORDER BY in all DBs, but MySQL does.
// However, let's try to use the raw column if possible.
// $this->select[$col] holds the original column definition (e.g. 'products.code').
$sort_col = isset($this->select[$col]) ? $this->select[$col] : $col;
$this->ci->db->order_by('LENGTH(' . $sort_col . ')', $dir);
$this->ci->db->order_by($sort_col, $dir);
break;
}
}
if (!$is_natural) {
$this->ci->db->order_by($col, $dir);
}
}
}
}
/**
* Generates the LIMIT portion of the query
*
* @return mixed
*/
private function get_paging()
{
$iStart = $this->ci->input->post('iDisplayStart');
$iLength = $this->ci->input->post('iDisplayLength');
if ($iLength != '' && $iLength != '-1') {
$this->ci->db->limit($iLength, ($iStart) ? $iStart : 0);
}
}
/**
* Get result count
*
* @return integer
*/
private function get_total_results($filtering = false)
{
if ($filtering) {
$this->get_filtering();
}
foreach ($this->joins as $val) {
$this->ci->db->join($val[0], $val[1], $val[2]);
}
foreach ($this->where as $val) {
$this->ci->db->where($val[0], $val[1], $val[2]);
}
foreach ($this->or_where as $val) {
$this->ci->db->or_where($val[0], $val[1], $val[2]);
}
foreach ($this->group_by as $val) {
$this->ci->db->group_by($val);
}
foreach ($this->like as $val) {
$this->ci->db->like($val[0], $val[1], $val[2]);
}
if (strlen($this->distinct) > 0) {
$this->ci->db->distinct($this->distinct);
$this->ci->db->select($this->columns);
}
$query = $this->ci->db->get($this->table, null, null, false);
return $query->num_rows();
}
/**
* Workaround for json_encode's UTF-8 encoding if a different charset needs to be used
*
* @param mixed $result
* @return string
*/
private function jsonify($result = false)
{
if (is_null($result)) {
return 'null';
}
if ($result === false) {
return 'false';
}
if ($result === true) {
return 'true';
}
if (is_scalar($result)) {
if (is_float($result)) {
return floatval(str_replace(',', '.', strval($result)));
}
if (is_string($result)) {
static $jsonReplaces = [['\\', '/', '\n', '\t', '\r', '\b', '\f', '"'], ['\\\\', '\\/', '\\n', '\\t', '\\r', '\\b', '\\f', '\"']];
return '"' . str_replace($jsonReplaces[0], $jsonReplaces[1], $result) . '"';
}
return $result;
}
$isList = true;
for ($i = 0, reset($result); $i < count($result); $i++, next($result)) {
if (key($result) !== $i) {
$isList = false;
break;
}
}
$json = [];
if ($isList) {
foreach ($result as $value) {
$json[] = $this->jsonify($value);
}
return '[' . join(',', $json) . ']';
}
foreach ($result as $key => $value) {
$json[] = $this->jsonify($key) . ':' . $this->jsonify($value);
}
return '{' . join(',', $json) . '}';
}
/**
* Builds an encoded string data. Returns JSON by default, and an array of aaData and sColumns if output is set to raw.
*
* @param string $output
* @param string $charset
* @return mixed
*/
private function produce_output($output, $charset)
{
$aaData = [];
$rResult = $this->get_display_result();
if ($output == 'json') {
$iTotal = $this->get_total_results();
$iFilteredTotal = $this->get_total_results(true);
}
foreach ($rResult->result_array() as $row_key => $row_val) {
$aaData[$row_key] = ($this->check_mDataprop()) ? $row_val : array_values($row_val);
foreach ($this->add_columns as $field => $val) {
if ($this->check_mDataprop()) {
$aaData[$row_key][$field] = $this->exec_replace($val, $aaData[$row_key]);
} else {
$aaData[$row_key][] = $this->exec_replace($val, $aaData[$row_key]);
}
}
foreach ($this->edit_columns as $modkey => $modval) {
foreach ($modval as $val) {
$aaData[$row_key][($this->check_mDataprop()) ? $modkey : array_search($modkey, $this->columns)] = $this->exec_replace($val, $aaData[$row_key]);
}
}
$aaData[$row_key] = array_diff_key($aaData[$row_key], ($this->check_mDataprop()) ? $this->unset_columns : array_intersect($this->columns, $this->unset_columns));
if (!$this->check_mDataprop()) {
$aaData[$row_key] = array_values($aaData[$row_key]);
}
}
$sColumns = array_diff($this->columns, $this->unset_columns);
$sColumns = array_merge_recursive($sColumns, array_keys($this->add_columns));
if ($output == 'json') {
$sOutput = [
'sEcho' => intval($this->ci->input->post('sEcho')),
'iTotalRecords' => $iTotal,
'iTotalDisplayRecords' => $iFilteredTotal,
'aaData' => $aaData,
'sColumns' => implode(',', $sColumns),
];
if ($charset == 'utf-8') {
return json_encode($sOutput);
}
return $this->jsonify($sOutput);
}
return ['aaData' => $aaData, 'sColumns' => $sColumns];
}
}
/* End of file Datatables.php */
/* Location: ./application/libraries/Datatables.php */