<?php
/* vim: set expandtab sw=4 ts=4 sts=4: */
/**
 * manipulation of table data like inserting, replacing and updating
 *
 * usally called as form action from tbl_change.php to insert or update table rows
 *
 *
 * @todo 'edit_next' tends to not work as expected if used ... at least there is no order by
 *       it needs the original query and the row number and than replace the LIMIT clause
 * @package PhpMyAdmin
 */

/**
 * Gets some core libraries
 */
require_once 'libraries/common.inc.php';

// Check parameters
PMA_checkParameters(array('db', 'table', 'goto'));

PMA_DBI_select_db($GLOBALS['db']);

/**
 * Initializes some variables
 */
$goto_include = false;

$GLOBALS['js_include'][] = 'makegrid.js';
// Needed for generation of Inline Edit anchors
$GLOBALS['js_include'][] = 'sql.js';

if (isset($_REQUEST['insert_rows'])
    && is_numeric($_REQUEST['insert_rows'])
    && $_REQUEST['insert_rows'] != $cfg['InsertRows']
) {
    $cfg['InsertRows'] = $_REQUEST['insert_rows'];
    $GLOBALS['js_include'][] = 'tbl_change.js';
    include_once 'libraries/header.inc.php';
    include 'tbl_change.php';
    exit;
}

if (isset($_REQUEST['after_insert'])
    && in_array($_REQUEST['after_insert'], array('new_insert', 'same_insert', 'edit_next'))
) {
    $url_params['after_insert'] = $_REQUEST['after_insert'];
    //$GLOBALS['goto'] = 'tbl_change.php';
    $goto_include = 'tbl_change.php';

    if (isset($_REQUEST['where_clause'])) {
        if ($_REQUEST['after_insert'] == 'same_insert') {
            foreach ($_REQUEST['where_clause'] as $one_where_clause) {
                $url_params['where_clause'][] = $one_where_clause;
            }
        } elseif ($_REQUEST['after_insert'] == 'edit_next') {
            foreach ($_REQUEST['where_clause'] as $one_where_clause) {
                $local_query    = 'SELECT * FROM ' . PMA_backquote($GLOBALS['db']) . '.' . PMA_backquote($GLOBALS['table'])
                                . ' WHERE ' . str_replace('` =', '` >', $one_where_clause)
                                . ' LIMIT 1;';
                $res            = PMA_DBI_query($local_query);
                $row            = PMA_DBI_fetch_row($res);
                $meta           = PMA_DBI_get_fields_meta($res);
                // must find a unique condition based on unique key,
                // not a combination of all fields
                list($unique_condition, $clause_is_unique) = PMA_getUniqueCondition($res, count($meta), $meta, $row, true);
                if (! empty($unique_condition)) {
                    $_SESSION['edit_next'] = $unique_condition;
                }
                unset($unique_condition, $clause_is_unique);
            }
        }
    }
} elseif (! empty($GLOBALS['goto'])) {
    if (! preg_match('@^[a-z_]+\.php$@', $GLOBALS['goto'])) {
        // this should NOT happen
        //$GLOBALS['goto'] = false;
        $goto_include = false;
    } else {
        $goto_include = $GLOBALS['goto'];
    }
    if ($GLOBALS['goto'] == 'db_sql.php' && strlen($GLOBALS['table'])) {
        $GLOBALS['table'] = '';
    }
}

if (! $goto_include) {
    if (! strlen($GLOBALS['table'])) {
        $goto_include = 'db_sql.php';
    } else {
        $goto_include = 'tbl_sql.php';
    }
}

// Defines the url to return in case of failure of the query
if (isset($_REQUEST['err_url'])) {
    $err_url = $_REQUEST['err_url'];
} else {
    $err_url = 'tbl_change.php' . PMA_generate_common_url($url_params);
}

/**
 * Prepares the update/insert of a row
 */
if (isset($_REQUEST['where_clause'])) {
    // we were editing something => use the WHERE clause
    $loop_array = (is_array($_REQUEST['where_clause']) ? $_REQUEST['where_clause'] : array($_REQUEST['where_clause']));
    $using_key  = true;
    $is_insert  = $_REQUEST['submit_type'] == 'insert'
                  || $_REQUEST['submit_type'] == 'showinsert'
                  || $_REQUEST['submit_type'] == 'insertignore';
    $is_insertignore  = $_REQUEST['submit_type'] == 'insertignore';
} else {
    // new row => use indexes
    $loop_array = array();
    foreach ($_REQUEST['fields']['multi_edit'] as $key => $dummy) {
        $loop_array[] = $key;
    }
    $using_key  = false;
    $is_insert  = true;
    $is_insertignore = false;
}

$query = array();
$value_sets = array();
$func_no_param = array(
    'CONNECTION_ID',
    'CURRENT_USER',
    'CURDATE',
    'CURTIME',
    'DATABASE',
    'LAST_INSERT_ID',
    'NOW',
    'PI',
    'RAND',
    'SYSDATE',
    'UNIX_TIMESTAMP',
    'USER',
    'UTC_DATE',
    'UTC_TIME',
    'UTC_TIMESTAMP',
    'UUID',
    'VERSION',
);
$func_optional_param = array(
    'RAND',
    'UNIX_TIMESTAMP',
);

$gis_from_text_functions = array(
    'GeomFromText',
    'GeomCollFromText',
    'LineFromText',
    'MLineFromText',
    'PointFromText',
    'MPointFromText',
    'PolyFromText',
    'MPolyFromText',
);

$gis_from_wkb_functions = array(
    'GeomFromWKB',
    'GeomCollFromWKB',
    'LineFromWKB',
    'MLineFromWKB',
    'PointFromWKB',
    'MPointFromWKB',
    'PolyFromWKB',
    'MPolyFromWKB',
);

foreach ($loop_array as $rownumber => $where_clause) {
    // skip fields to be ignored
    if (! $using_key && isset($_REQUEST['insert_ignore_' . $where_clause])) {
        continue;
    }

    // Defines the SET part of the sql query
    $query_values = array();

    // Map multi-edit keys to single-level arrays, dependent on how we got the fields
    $me_fields
        = isset($_REQUEST['fields']['multi_edit'][$rownumber])
        ? $_REQUEST['fields']['multi_edit'][$rownumber]
        : array();
    $me_fields_name
        = isset($_REQUEST['fields_name']['multi_edit'][$rownumber])
        ? $_REQUEST['fields_name']['multi_edit'][$rownumber]
        : null;
    $me_fields_prev
        = isset($_REQUEST['fields_prev']['multi_edit'][$rownumber])
        ? $_REQUEST['fields_prev']['multi_edit'][$rownumber]
        : null;
    $me_funcs
        = isset($_REQUEST['funcs']['multi_edit'][$rownumber])
        ? $_REQUEST['funcs']['multi_edit'][$rownumber]
        : null;
    $me_fields_type
        = isset($_REQUEST['fields_type']['multi_edit'][$rownumber])
        ? $_REQUEST['fields_type']['multi_edit'][$rownumber]
        : null;
    $me_fields_null
        = isset($_REQUEST['fields_null']['multi_edit'][$rownumber])
        ? $_REQUEST['fields_null']['multi_edit'][$rownumber]
        : null;
    $me_fields_null_prev
        = isset($_REQUEST['fields_null_prev']['multi_edit'][$rownumber])
        ? $_REQUEST['fields_null_prev']['multi_edit'][$rownumber]
        : null;
    $me_auto_increment
        = isset($_REQUEST['auto_increment']['multi_edit'][$rownumber])
        ? $_REQUEST['auto_increment']['multi_edit'][$rownumber]
        : null;

    // Fetch the current values of a row to use in case we have a protected field
    // @todo possibly move to ./libraries/tbl_replace_fields.inc.php
    if ($is_insert
        && $using_key && isset($me_fields_type)
        && is_array($me_fields_type) && isset($where_clause)
    ) {
        $prot_row = PMA_DBI_fetch_single_row('SELECT * FROM ' . PMA_backquote($table) . ' WHERE ' . $where_clause . ';');
    }

    // When a select field is nullified, it's not present in $_REQUEST
    // so initialize it; this way, the foreach($me_fields) will process it
    foreach ($me_fields_name as $key => $val) {
        if (! isset($me_fields[$key])) {
            $me_fields[$key] = '';
        }
    }

    // Iterate in the order of $me_fields_name, not $me_fields, to avoid problems
    // when inserting multiple entries
    foreach ($me_fields_name as $key => $field_name) {
        $val = $me_fields[$key];

        // Note: $key is an md5 of the fieldname. The actual fieldname is available in $me_fields_name[$key]

        include 'libraries/tbl_replace_fields.inc.php';

        if (empty($me_funcs[$key])) {
            $cur_value = $val;
        } elseif ('UUID' === $me_funcs[$key]) {
            /* This way user will know what UUID new row has */
            $uuid = PMA_DBI_fetch_value('SELECT UUID()');
            $cur_value = "'" . $uuid . "'";
        } elseif ((in_array($me_funcs[$key], $gis_from_text_functions)
            && substr($val, 0, 3) == "'''")
            || in_array($me_funcs[$key], $gis_from_wkb_functions)
        ) {
            // Remove enclosing apostrophes
            $val = substr($val, 1, strlen($val) - 2);
            // Remove escaping apostrophes
            $val = str_replace("''", "'", $val);
            $cur_value = $me_funcs[$key] . '(' . $val . ')';
        } elseif (! in_array($me_funcs[$key], $func_no_param)
                  || ($val != "''" && in_array($me_funcs[$key], $func_optional_param))) {
            $cur_value = $me_funcs[$key] . '(' . $val . ')';
        } else {
            $cur_value = $me_funcs[$key] . '()';
        }

        //  i n s e r t
        if ($is_insert) {
            // no need to add column into the valuelist
            if (strlen($cur_value)) {
                $query_values[] = $cur_value;
                // first inserted row so prepare the list of fields
                if (empty($value_sets)) {
                    $query_fields[] = PMA_backquote($me_fields_name[$key]);
                }
            }

        //  u p d a t e
        } elseif (!empty($me_fields_null_prev[$key])
         && ! isset($me_fields_null[$key])) {
            // field had the null checkbox before the update
            // field no longer has the null checkbox
            $query_values[] = PMA_backquote($me_fields_name[$key]) . ' = ' . $cur_value;
        } elseif (empty($me_funcs[$key])
         && isset($me_fields_prev[$key])
         && ("'" . PMA_sqlAddSlashes($me_fields_prev[$key]) . "'" == $val)) {
            // No change for this column and no MySQL function is used -> next column
            continue;
        } elseif (! empty($val)) {
            // avoid setting a field to NULL when it's already NULL
            // (field had the null checkbox before the update
            //  field still has the null checkbox)
            if (empty($me_fields_null_prev[$key])
                || empty($me_fields_null[$key])
            ) {
                 $query_values[] = PMA_backquote($me_fields_name[$key]) . ' = ' . $cur_value;
            }
        }
    } // end foreach ($me_fields as $key => $val)

    if (count($query_values) > 0) {
        if ($is_insert) {
            $value_sets[] = implode(', ', $query_values);
        } else {
            // build update query
            $query[] = 'UPDATE ' . PMA_backquote($GLOBALS['db']) . '.' . PMA_backquote($GLOBALS['table'])
                . ' SET ' . implode(', ', $query_values)
                . ' WHERE ' . $where_clause . ($_REQUEST['clause_is_unique'] ? '' : ' LIMIT 1');

        }
    }
} // end foreach ($loop_array as $where_clause)
unset($me_fields_name, $me_fields_prev, $me_funcs, $me_fields_type, $me_fields_null, $me_fields_null_prev,
    $me_auto_increment, $cur_value, $key, $val, $loop_array, $where_clause, $using_key,
    $func_no_param);


// Builds the sql query
if ($is_insert && count($value_sets) > 0) {
    if ($is_insertignore) {
        $insert_command = 'INSERT IGNORE ';
    } else {
        $insert_command = 'INSERT ';
    }
    $query[] = $insert_command . 'INTO ' . PMA_backquote($GLOBALS['db']) . '.' . PMA_backquote($GLOBALS['table'])
        . ' (' . implode(', ', $query_fields) . ') VALUES (' . implode('), (', $value_sets) . ')';
    unset($insert_command);

    unset($query_fields);
} elseif (empty($query)) {
    // No change -> move back to the calling script
    //
    // Note: logic passes here for inline edit
    $message = PMA_Message::success(__('No change'));
    $active_page = $goto_include;
    if (! $GLOBALS['is_ajax_request'] == true) {
        include_once 'libraries/header.inc.php';
    }
    include '' . PMA_securePath($goto_include);
    exit;
}
unset($me_fields, $is_insertignore);

/**
 * Executes the sql query and get the result, then move back to the calling
 * page
 */
if (! empty($GLOBALS['sql_query'])) {
    $url_params['sql_query'] = $GLOBALS['sql_query'];
    $return_to_sql_query = $GLOBALS['sql_query'];
}
$GLOBALS['sql_query'] = implode('; ', $query) . ';';
// to ensure that the query is displayed in case of
// "insert as new row" and then "insert another new row"
$GLOBALS['display_query'] = $GLOBALS['sql_query'];

$total_affected_rows = 0;
$last_messages = array();
$warning_messages = array();
$error_messages = array();

foreach ($query as $single_query) {
    if ($_REQUEST['submit_type'] == 'showinsert') {
        $last_messages[] = PMA_Message::notice(__('Showing SQL query'));
        continue;
    }
    if ($GLOBALS['cfg']['IgnoreMultiSubmitErrors']) {
        $result = PMA_DBI_try_query($single_query);
    } else {
        $result = PMA_DBI_query($single_query);
    }

    if (! $result) {
        $error_messages[] = PMA_Message::sanitize(PMA_DBI_getError());
    } else {
        // The next line contains a real assignment, it's not a typo
        if ($tmp = @PMA_DBI_affected_rows()) {
            $total_affected_rows += $tmp;
        }
        unset($tmp);

        $insert_id = PMA_DBI_insert_id();
        if ($insert_id != 0) {
            // insert_id is id of FIRST record inserted in one insert, so if we
            // inserted multiple rows, we had to increment this

            if ($total_affected_rows > 0) {
                $insert_id = $insert_id + $total_affected_rows - 1;
            }
            $last_message = PMA_Message::notice(__('Inserted row id: %1$d'));
            $last_message->addParam($insert_id);
            $last_messages[] = $last_message;
        }
        PMA_DBI_free_result($result);
    } // end if

    foreach (PMA_DBI_get_warnings() as $warning) {
        $warning_messages[]
            = PMA_Message::sanitize(
                $warning['Level'] . ': #' . $warning['Code'] . ' ' . $warning['Message']
            );
    }

    unset($result);
}
unset($single_query, $query);

if ($is_insert && count($value_sets) > 0) {
    $message = PMA_Message::inserted_rows($total_affected_rows);
} else {
    $message = PMA_Message::affected_rows($total_affected_rows);
}

$message->addMessages($last_messages, '<br />');

if (! empty($warning_messages)) {
    $message->addMessages($warning_messages, '<br />');
    $message->isError(true);
}
if (! empty($error_messages)) {
    $message->addMessages($error_messages);
    $message->isError(true);
}
unset($error_messages, $warning_messages, $total_affected_rows, $last_messages, $last_message);

if ($GLOBALS['is_ajax_request'] == true) {
    /**
     * If we are in grid editing, we need to process the relational and
     * transformed fields, if they were edited. After that, output the correct
     * link/transformed value and exit
     *
     * Logic taken from libraries/display_tbl.lib.php
     */

    if (isset($_REQUEST['rel_fields_list']) && $_REQUEST['rel_fields_list'] != '') {
        //handle relations work here for updated row.
        include_once 'libraries/relation.lib.php';

        $map = PMA_getForeigners($db, $table, '', 'both');

        $rel_fields = array();
        parse_str($_REQUEST['rel_fields_list'], $rel_fields);

        // loop for each relation cell
        foreach ( $rel_fields as $cell_index => $curr_cell_rel_field) {

            foreach ( $curr_cell_rel_field as $rel_field => $rel_field_value) {

                $where_comparison = "='" . $rel_field_value . "'";
                $display_field = PMA_getDisplayField($map[$rel_field]['foreign_db'], $map[$rel_field]['foreign_table']);

                // Field to display from the foreign table?
                if (isset($display_field) && strlen($display_field)) {
                    $dispsql     = 'SELECT ' . PMA_backquote($display_field)
                        . ' FROM ' . PMA_backquote($map[$rel_field]['foreign_db'])
                        . '.' . PMA_backquote($map[$rel_field]['foreign_table'])
                        . ' WHERE ' . PMA_backquote($map[$rel_field]['foreign_field'])
                        . $where_comparison;
                    $dispresult  = PMA_DBI_try_query($dispsql, null, PMA_DBI_QUERY_STORE);
                    if ($dispresult && PMA_DBI_num_rows($dispresult) > 0) {
                        list($dispval) = PMA_DBI_fetch_row($dispresult, 0);
                    } else {
                        //$dispval = __('Link not found');
                    }
                    @PMA_DBI_free_result($dispresult);
                } else {
                    $dispval     = '';
                } // end if... else...

                if ('K' == $_SESSION['tmp_user_values']['relational_display']) {
                    // user chose "relational key" in the display options, so
                    // the title contains the display field
                    $title = (! empty($dispval))? ' title="' . htmlspecialchars($dispval) . '"' : '';
                } else {
                    $title = ' title="' . htmlspecialchars($rel_field_value) . '"';
                }

                $_url_params = array(
                    'db'    => $map[$rel_field]['foreign_db'],
                    'table' => $map[$rel_field]['foreign_table'],
                    'pos'   => '0',
                    'sql_query' => 'SELECT * FROM '
                        . PMA_backquote($map[$rel_field]['foreign_db']) . '.' . PMA_backquote($map[$rel_field]['foreign_table'])
                        . ' WHERE ' . PMA_backquote($map[$rel_field]['foreign_field']) . $where_comparison
                );
                $output = '<a href="sql.php' . PMA_generate_common_url($_url_params) . '"' . $title . '>';

                if ('D' == $_SESSION['tmp_user_values']['relational_display']) {
                    // user chose "relational display field" in the
                    // display options, so show display field in the cell
                    $output .= (!empty($dispval)) ? htmlspecialchars($dispval) : '';
                } else {
                    // otherwise display data in the cell
                    $output .= htmlspecialchars($rel_field_value);
                }
                $output .= '</a>';
                $extra_data['relations'][$cell_index] = $output;
            }
        }   // end of loop for each relation cell
    }

    if (isset($_REQUEST['do_transformations']) && $_REQUEST['do_transformations'] == true ) {
        include_once 'libraries/transformations.lib.php';
        //if some posted fields need to be transformed, generate them here.
        $mime_map = PMA_getMIME($db, $table);

        if ($mime_map === false) {
            $mime_map = array();
        }

        $edited_values = array();
        parse_str($_REQUEST['transform_fields_list'], $edited_values);

        foreach ($mime_map as $transformation) {
            $include_file = PMA_securePath($transformation['transformation']);
            $column_name = $transformation['column_name'];

            foreach ($edited_values as $cell_index => $curr_cell_edited_values) {
                if (isset($curr_cell_edited_values[$column_name])) {
                    $column_data = $curr_cell_edited_values[$column_name];

                    $_url_params = array(
                        'db'            => $db,
                        'table'         => $table,
                        'where_clause'  => $_REQUEST['where_clause'],
                        'transform_key' => $column_name,
                    );

                    if (file_exists('libraries/transformations/' . $include_file)) {
                        $transformfunction_name = str_replace('.inc.php', '', $transformation['transformation']);

                        include_once 'libraries/transformations/' . $include_file;

                        if (function_exists('PMA_transformation_' . $transformfunction_name)) {
                            $transform_function = 'PMA_transformation_' . $transformfunction_name;
                            $transform_options  = PMA_transformation_getOptions(
                                isset($transformation['transformation_options']) ? $transformation['transformation_options'] : ''
                            );
                            $transform_options['wrapper_link'] = PMA_generate_common_url($_url_params);
                        }
                    }

                    $extra_data['transformations'][$cell_index] = $transform_function($column_data, $transform_options);
                }
            }   // end of loop for each transformation cell
        }   // end of loop for each $mime_map
    }

    /**Get the total row count of the table*/
    $extra_data['row_count'] = PMA_Table::countRecords($_REQUEST['db'], $_REQUEST['table']);
    $extra_data['sql_query'] = PMA_showMessage($message, $GLOBALS['display_query']);
    PMA_ajaxResponse($message, $message->isSuccess(), $extra_data);
}

if (isset($return_to_sql_query)) {
    $disp_query = $GLOBALS['sql_query'];
    $disp_message = $message;
    unset($message);
    $GLOBALS['sql_query'] = $return_to_sql_query;
}

$GLOBALS['js_include'][] = 'tbl_change.js';

$active_page = $goto_include;

/**
 * If user asked for "and then Insert another new row" we have to remove
 * WHERE clause information so that tbl_change.php does not go back
 * to the current record
 */
if (isset($_REQUEST['after_insert']) && 'new_insert' == $_REQUEST['after_insert']) {
        unset($_REQUEST['where_clause']);
}

/**
 * Load header.
 */
require_once 'libraries/header.inc.php';
/**
 * Load target page.
 */
require '' . PMA_securePath($goto_include);
exit;
?>