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✏️ Editing: Datatables.php

<?php

if (!defined('BASEPATH')) {
    exit('No direct script access allowed');
}

class Datatables
{

/**
     * Global container variables for chained argument results
     *
     */
    private $ci;
    private $table;
    private $distinct;
    private $searchable         = "";
    private $group_by           = array();
    private $select             = array();
    private $joins              = array();
    private $columns            = array();
    private $where              = array();
    private $or_where           = array();
    private $where_in           = array();
    private $like               = array();
    private $or_like            = array();
    private $filter             = array();
    private $add_columns        = array();
    private $edit_columns       = array();
    private $unset_columns      = array();
    private $search             = array();
    private $sortable           = array();
    private $orderable          = array();
    private $or_like_array      = array();
    private $query              = "";
    private $dt_by_query        = false;
    private $query_where_enable = false;

/**
     * Copies an instance of CI
     */
    public function __construct()
    {
        $this->ci = &get_instance();

}
    public function query($query)
    {
        $this->query       = $query;
        $this->dt_by_query = true;
        return $this;
    }

public function set_database($db_name)
    {
        $db_data      = $this->ci->load->database($db_name, true);
        $this->ci->db = $db_data;
    }

/**
     * 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) {

$column   = trim(strtolower($val));
            $variable = strstr($column, ' as ', true) ?: $column;
            // $column = preg_replace('/.*\.(.*)/i', '$1', $column); // get name after `.`
            $this->columns[]         = $variable;
            $this->select[$variable] = trim($variable);
        }
        $this->ci->db->select($columns, $backtick_protect);
        return $this;
    }

public function searchable($data)
    {
        $this->searchable = $data;
        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;
    }

/**
     * Generates a custom GROUP BY portion of the query
     *
     * @param string $val
     * @return mixed
     */
    public function group_by($val, $sql = false)
    {
        $this->group_by[] = $val;
        if (!$sql) {
            $this->ci->db->group_by($val);

}
        return $this;
    }

/**
     * Generates the FROM portion of the query
     *
     * @param string $table
     * @return mixed
     */
    public function from($table)
    {
        $this->ci->db->from($table);
        $this->table = $table;
        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)
    {
        $this->joins[] = array($table, $fk, $type);
        $this->ci->db->join($table, $fk, $type);
        return $this;
    }

public function orderable($columns, $backtick_protect = true)
    {

foreach ($this->explode(',', $columns) as $val) {
            $column            = trim(preg_replace('/(.*)\s+as\s+(\w*)/i', '$2', $val));
            $this->orderable[] = $column;
        }
        return $this;
    }

public function sort($column, $order = 'asc')
    {
        $this->sortable[] = array($column, $order);
        return $this;
    }

public function query_where_enable($status = false)
    {
        $this->query_where_enable = $status;
        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, $sql = false, $backtick_protect = true)
    {
        $this->where[] = array($key_condition, $val, $backtick_protect);
        if (!$sql) {
            $this->ci->db->where($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, $sql = false, $backtick_protect = true)
    {
        $this->or_where[] = array($key_condition, $val, $backtick_protect);
        if (!$sql) {
            $this->ci->db->or_where($key_condition, $val, $backtick_protect);
        }
        return $this;
    }

/**
     * Generates the WHERE IN portion of the query
     *
     * @param mixed $key_condition
     * @param string $val
     * @param bool $backtick_protect
     * @return mixed
     */
    public function where_in($key_condition, $val = null)
    {
        $this->where_in[] = array($key_condition, $val);
        $this->ci->db->where_in($key_condition, $val);
        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)
    {
        $this->filter[] = array($key_condition, $val, $backtick_protect);
        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, $side = 'both')
    {
        $this->like[] = array($key_condition, $val, $side);
        $this->ci->db->like($key_condition, $val, $side);
        return $this;
    }
    /**
     * Generates the OR %LIKE% portion of the query
     *
     * @param mixed $key_condition
     * @param string $val
     * @param bool $backtick_protect
     * @return mixed
     */
    public function or_like($key_condition, $val = null, $side = 'both')
    {
        $this->or_like[] = array($key_condition, $val, $side);
        $this->ci->db->or_like($key_condition, $val, $side);
        return $this;
    }

public function or_like_string($array_string, $match)
    {
        $array_like = explode(',', $array_string);
        foreach ($array_like as $key => $string_value) {
            if ($key == 0) {
                $this->ci->db->like($string_value, $match);
            } else {
                $this->ci->db->or_like($string_value, $match);
            }
        }
    }

public function group_start()
    {
        $this->ci->db->group_start();
        return $this;
    }
    public function group_end()
    {
        $this->ci->db->group_end();
        return $this;
    }

/**
     * 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] = array('content' => $content, 'replacement' => $this->explode(',', $match_replacement));
        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][] = array('content' => $content, 'replacement' => $this->explode(',', $match_replacement));
        return $this;
    }

/**
     * 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;
    }

/**
     * 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', $charset = 'UTF-8')
    {
        if (!$this->dt_by_query) {

$this->get_ordering();
            $this->get_filtering();

$total = $this->ci->db->count_all_results('', false);

$sOutput['query_count'] = $this->ci->db->last_query();
            $iTotal                 = $iFilteredTotal                 = $total;
            //========================
            $aaData = array();
            $this->get_paging();
            $rResult = $this->ci->db->get();
            $sOutput = array
                (
                'draw'            => intval($this->ci->input->post('draw')),
                'recordsTotal'    => $iTotal,
                'recordsFiltered' => $iFilteredTotal,
                'data'            => $rResult->result_array(),
            );

return json_encode($sOutput);

} else {

//=========start Search by Query ==========
            $where_condition = $sqlTot = $sqlRec = "";
            $sql_query       = $this->query . " WHERE ";
            //========Search input========
            $sWhere = "";
            //========group by =====

if (!empty($this->where)) {
                foreach ($this->where as $val) {
                   
                    $sWhere .= "`{$val[0]}` = '{$val[1]}' AND ";
                }
                $sWhere = substr($sWhere, 0, -(strlen('AND') + 2));
            } else {
                $sql_query = substr($sql_query, 0, -6);
            }

if (!empty($this->or_where)) {

foreach ($this->or_where as $val) {
                   
                    $sWhere .= " OR `{$val[0]}` = '{$val[1]}'";
                }
                
            }

$sqlRec .= $sql_query;

$search           = $this->ci->input->post('search');
            $search           = $this->ci->db->escape_like_str(trim($search['value']));
            $column           = explode(',', $this->searchable);
            $this->searchable = array();
            if (isset($search) && $search != "") {
                $sWhere .= (!$this->query_where_enable ? " WHERE" : " AND") . " (";
                foreach ($column as $key => $col) {
                    $col                = strtolower($col);
                    $col                = strstr($col, ' as ', true) ?: $col;
                    $this->searchable[] = $col;
                }
                for ($i = 0; $i < count($this->searchable); $i++) {

$sWhere .= $this->searchable[$i] . " LIKE '%" . ($search) . "%' OR ";
                }
                $sWhere = substr_replace($sWhere, "", -3);
                $sWhere .= ')';
            }

//========Search input========
            $sqlRec .= $sWhere;

//========group by =====

foreach ($this->group_by as $val) {
                $sqlRec .= " GROUP BY " . $val;
            }

//========order by======
            if ($this->ci->input->post('order')) {

foreach ($this->ci->input->post('order') as $key) {
                    $sqlRec .= " ORDER BY " . $this->orderable[$key['column']] . "   " . $key['dir'];
                }
            } else {
                foreach ($this->sortable as $val) {
                    $sqlRec .= " ORDER BY " . $val[0] . "   " . $val[1];
                }
            }

$sqlTot = $sqlRec;
            //=============
            $iStart  = $this->ci->input->post('start');
            $iLength = $this->ci->input->post('length');
            if ($iLength != '' && $iLength != '-1') {
                $sqlRec .= "  LIMIT " . $iStart . " ," . $iLength . "   ";
            }

$query_total = $this->ci->db->query($sqlTot);
            $total       = $query_total->num_rows();

$iTotal = $iFilteredTotal = $total;
            //=========end Search by Query ==========

$rResult = $this->ci->db->query($sqlRec);

$sOutput = array
                (
                'draw'            => intval($this->ci->input->post('draw')),
                'recordsTotal'    => $iTotal,
                'recordsFiltered' => $iFilteredTotal,
                'data'            => $rResult->result_array(),
            );

return json_encode($sOutput);

}

//========================
        // return $this->produce_output(strtolower($output), strtolower($charset));
    }

/**
     * Generates the LIMIT portion of the query
     *
     * @return mixed
     */
    private function get_paging()
    {
        $iStart  = $this->ci->input->post('start');
        $iLength = $this->ci->input->post('length');
        if ($iLength != '' && $iLength != '-1') {
            $this->ci->db->limit($iLength, ($iStart) ? $iStart : 0);
        }
    }

/**
     * Generates the ORDER BY portion of the query
     *
     * @return mixed
     */
    private function get_ordering()
    {
        $Data = $this->ci->input->post('columns');
        if ($this->ci->input->post('order')) {

foreach ($this->ci->input->post('order') as $key) {

$this->ci->db->order_by($this->orderable[$key['column']], $key['dir']);
            }
        }

foreach ($this->sortable as $val) {
            $this->ci->db->order_by($val[0], $val[1]);
        }
    }

/**
     * Generates a %LIKE% portion of the query
     *
     * @return mixed
     */
    private function get_filtering()
    {
        $sss       = array();
        $mColArray = $this->ci->input->post('columns');
        $sWhere    = '';
        $search    = $this->ci->input->post('search');
        $sSearch   = $this->ci->db->escape_like_str(trim($search['value']));
        $columns   = array_values(array_diff($this->columns, $this->unset_columns));

if ($sSearch != '' && $this->searchable != '') {
            if ($this->searchable == '*') {
                $field            = $this->ci->db->list_fields($this->table);
                $this->searchable = implode(',', $field);
            }

$column = explode(',', $this->searchable);
            foreach ($column as $key => $col) {
                $col         = strtolower($col);
                $col         = strstr($col, ' as ', true) ?: $col;
                $this->sss[] = $col;
            }

if ($sSearch != "") {
                for ($i = 0; $i < count($this->sss); $i++) {
                    if ($i == 0) {
                        $this->ci->db->group_start();
                        $this->ci->db->like($this->sss[$i], $sSearch);
                    } else {
                        $this->ci->db->or_like($this->sss[$i], $sSearch);
                    }

if (count($this->sss) - 1 == $i) //last loop
                    {
                        $this->ci->db->group_end();
                    }
                    //close bracket
                }
            }
        } else {

if ($sSearch != '') {
                for ($i = 0; $i < count($mColArray); $i++) {
                    if ($mColArray[$i]['searchable'] == 'true' && !array_key_exists($mColArray[$i]['data'], $this->add_columns)) {
                        $sWhere .= $this->select[$this->columns[$i]] . " LIKE '%" . $sSearch . "%' OR ";
                    }
                }
            }

$sWhere = substr_replace($sWhere, '', -3);
            if ($sWhere != '') {
                $this->ci->db->where('(' . $sWhere . ')');
            }
        }

// TODO : sRangeSeparator

foreach ($this->filter as $val) {
            $this->ci->db->where($val[0], $val[1], $val[2]);
        }
    }

/**
     * 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();
    }

/**
     * Builds an encoded string data. Returns JSON by default, and an array of aaData if output is set to raw.
     *
     * @param string $output
     * @param string $charset
     * @return mixed
     */
    // private function produce_output($output, $charset) {
    //     $aaData = array();
    //     $rResult = $this->get_display_result();

//     if ($output == 'json') {
    //         $iTotal = $this->get_total_results();
    //         $iFilteredTotal = $this->get_total_results(true);
    //     }

//     $sOutput = array
    //         (
    //         'draw' => intval($this->ci->input->post('draw')),
    //         'recordsTotal' => $iTotal,
    //         'recordsFiltered' => $iFilteredTotal,
    //         'data' => $rResult->result_array(),
    //     );

//     if ($charset == 'utf-8') {
    //         return json_encode($sOutput);
    //     }
    // }

// private function produce_output1($output, $charset) {
    //     $aaData = array();
    //     $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_cType()) ? $row_val : array_values($row_val);

//         foreach ($this->add_columns as $field => $val) {
    //             if ($this->check_cType()) {
    //                 $aaData[$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_cType()) ? $modkey : array_search($modkey, $this->columns)] = $this->exec_replace($val, $aaData[$row_key]);
    //             }
    //         }

//         $aaData[$row_key] = array_diff_key($aaData[$row_key], ($this->check_cType()) ? $this->unset_columns : array_intersect($this->columns, $this->unset_columns));

//         if (!$this->check_cType()) {
    //             $aaData[$row_key] = array_values($aaData[$row_key]);
    //         }
    //     }

//     if ($output == 'json') {
    //         $sOutput = array
    //             (
    //             'draw' => intval($this->ci->input->post('draw')),
    //             'recordsTotal' => $iTotal,
    //             'recordsFiltered' => $iFilteredTotal,
    //             'data' => $aaData,
    //         );

//         if ($charset == 'utf-8') {
    //             return json_encode($sOutput);
    //         } else {
    //             return $this->jsonify($sOutput);
    //         }
    //     } else {
    //         return array('aaData' => $aaData);
    //     }
    // }

/**
     * 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->where_in as $val) {
            $this->ci->db->where_in($val[0], $val[1]);
        }

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]);
        }

foreach ($this->or_like as $val) {
            $this->ci->db->or_like($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();
    }

/**
     * 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 = '';

// Go through our array backwards, else $1 (foo) will replace $11, $12 etc with foo1, foo2 etc
        $custom_val['replacement'] = array_reverse($custom_val['replacement'], true);

if (isset($custom_val['replacement']) && is_array($custom_val['replacement'])) {
            //Added this line because when the replacement has over 10 elements replaced the variable "$1" first by the "$10"
            $custom_val['replacement'] = array_reverse($custom_val['replacement'], true);
            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_cType()) ? $args_val : array_search($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_cType()) ? $sval : array_search($sval, $this->columns)];
                } else {
                    $replace_string = $sval;
                }

$custom_val['content'] = str_ireplace('$' . ($key + 1), $replace_string, $custom_val['content']);
            }
        }

return $custom_val['content'];
    }

/**
     * Check column type -numeric or column name
     *
     * @return bool
     */
    private function check_cType()
    {
        $column = $this->ci->input->post('columns');
        if (is_numeric($column[0]['data'])) {
            return false;
        } else {
            return true;
        }
    }

/**
     * 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;
    }

/**
     * 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  = array();
        $hold    = array();
        $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     = array();
                $balance  = 0;
            }
        }

if (count($hold) > 0) {
            $retval[] = implode($delimiter, $hold);
        }

return $retval;
    }

/**
     * 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 $jsonReplaces = array(array('\\', '/', '\n', '\t', '\r', '\b', '\f', '"'), array('\\\\', '\\/', '\\n', '\\t', '\\r', '\\b', '\\f', '\"'));
                return '"' . str_replace($jsonReplaces[0], $jsonReplaces[1], $result) . '"';
            } else {
                return $result;
            }
        }

$isList = true;

for ($i = 0, reset($result); $i < count($result); $i++, next($result)) {
            if (key($result) !== $i) {
                $isList = false;
                break;
            }
        }

$json = array();

if ($isList) {
            foreach ($result as $value) {
                $json[] = $this->jsonify($value);
            }

return '[' . join(',', $json) . ']';
        } else {
            foreach ($result as $key => $value) {
                $json[] = $this->jsonify($key) . ':' . $this->jsonify($value);
            }

return '{' . join(',', $json) . '}';
        }
    }

/**
     * returns the sql statement of the last query run
     * @return type
     */
    public function last_query()
    {
        return $this->ci->db->last_query();
    }

}

/* End of file Datatables.php */
/* Location: ./application/libraries/Datatables.php */

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