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Current File : /usr/share/phpMyAdmin/libraries/tbl_indexes.lib.php
<?php
/* vim: set expandtab sw=4 ts=4 sts=4: */
/**
 * Set of functions related to table indexes
 *
 * @package PhpMyAdmin
 */
if (! defined('PHPMYADMIN')) {
    exit;
}

/**
 * Function to get the name and type of the columns of a table
 *
 * @param string $db    current database
 * @param string $table current table
 *
 * @return array
 */
function PMA_getNameAndTypeOfTheColumns($db, $table)
{
    $columns = array();
    foreach ($GLOBALS['dbi']->getColumnsFull($db, $table) as $row) {
        if (preg_match('@^(set|enum)\((.+)\)$@i', $row['Type'], $tmp)) {
            $tmp[2] = /*overload*/mb_substr(
                preg_replace('@([^,])\'\'@', '\\1\\\'', ',' . $tmp[2]), 1
            );
            $columns[$row['Field']] = $tmp[1] . '('
                . str_replace(',', ', ', $tmp[2]) . ')';
        } else {
            $columns[$row['Field']] = $row['Type'];
        }
    } // end while

    return $columns;
}

/**
 * Function to handle the creation or edit of an index
 *
 * @param string    $db    current db
 * @param string    $table current table
 * @param PMA_Index $index current index
 *
 * @return void
 */
function PMA_handleCreateOrEditIndex($db, $table, $index)
{
    $error = false;

    $sql_query = PMA_getSqlQueryForIndexCreateOrEdit($db, $table, $index, $error);

    // If there is a request for SQL previewing.
    if (isset($_REQUEST['preview_sql'])) {
        PMA_previewSQL($sql_query);
    }

    if (! $error) {
        $GLOBALS['dbi']->query($sql_query);
        $message = PMA_Message::success(
            __('Table %1$s has been altered successfully.')
        );
        $message->addParam($table);

        if ($GLOBALS['is_ajax_request'] == true) {
            $response = PMA_Response::getInstance();
            $response->addJSON(
                'message', PMA_Util::getMessage($message, $sql_query, 'success')
            );
            $response->addJSON('index_table', PMA_Index::getView($table, $db));
        } else {
            include 'tbl_structure.php';
        }
        exit;
    } else {
        $response = PMA_Response::getInstance();
        $response->isSuccess(false);
        $response->addJSON('message', $error);
        exit;
    }
}

/**
 * Function to get the sql query for index creation or edit
 *
 * @param string    $db     current db
 * @param string    $table  current table
 * @param PMA_Index $index  current index
 * @param bool      &$error whether error occurred or not
 *
 * @return string
 */
function PMA_getSqlQueryForIndexCreateOrEdit($db, $table, $index, &$error)
{
    // $sql_query is the one displayed in the query box
    $sql_query = 'ALTER TABLE ' . PMA_Util::backquote($db)
        . '.' . PMA_Util::backquote($table);

    // Drops the old index
    if (! empty($_REQUEST['old_index'])) {
        if ($_REQUEST['old_index'] == 'PRIMARY') {
            $sql_query .= ' DROP PRIMARY KEY,';
        } else {
            $sql_query .= ' DROP INDEX '
                . PMA_Util::backquote($_REQUEST['old_index']) . ',';
        }
    } // end if

    // Builds the new one
    switch ($index->getChoice()) {
    case 'PRIMARY':
        if ($index->getName() == '') {
            $index->setName('PRIMARY');
        } elseif ($index->getName() != 'PRIMARY') {
            $error = PMA_Message::error(
                __('The name of the primary key must be "PRIMARY"!')
            );
        }
        $sql_query .= ' ADD PRIMARY KEY';
        break;
    case 'FULLTEXT':
    case 'UNIQUE':
    case 'INDEX':
    case 'SPATIAL':
        if ($index->getName() == 'PRIMARY') {
            $error = PMA_Message::error(__('Can\'t rename index to PRIMARY!'));
        }
        $sql_query .= ' ADD ' . $index->getChoice() . ' '
            . ($index->getName() ? PMA_Util::backquote($index->getName()) : '');
        break;
    } // end switch

    $index_fields = array();
    foreach ($index->getColumns() as $key => $column) {
        $index_fields[$key] = PMA_Util::backquote($column->getName());
        if ($column->getSubPart()) {
            $index_fields[$key] .= '(' . $column->getSubPart() . ')';
        }
    } // end while

    if (empty($index_fields)) {
        $error = PMA_Message::error(__('No index parts defined!'));
    } else {
        $sql_query .= ' (' . implode(', ', $index_fields) . ')';
    }

    $keyBlockSizes = $index->getKeyBlockSize();
    if (! empty($keyBlockSizes)) {
        $sql_query .= " KEY_BLOCK_SIZE = "
             . PMA_Util::sqlAddSlashes($keyBlockSizes);
    }

    // specifying index type is allowed only for primary, unique and index only
    $type = $index->getType();
    if ($index->getChoice() != 'SPATIAL'
        && $index->getChoice() != 'FULLTEXT'
        && in_array($type, PMA_Index::getIndexTypes())
    ) {
        $sql_query .= ' USING ' . $type;
    }

    $parser = $index->getParser();
    if ($index->getChoice() == 'FULLTEXT' && ! empty($parser)) {
        $sql_query .= " WITH PARSER " . PMA_Util::sqlAddSlashes($parser);
    }

    $comment = $index->getComment();
    if (! empty($comment)) {
        $sql_query .= " COMMENT '" . PMA_Util::sqlAddSlashes($comment) . "'";
    }

    $sql_query .= ';';

    return $sql_query;
}

/**
 * Function to prepare the form values for index
 *
 * @param string $db    current database
 * @param string $table current table
 *
 * @return PMA_Index
 */
function PMA_prepareFormValues($db, $table)
{
    if (isset($_REQUEST['index'])) {
        if (is_array($_REQUEST['index'])) {
            // coming already from form
            $index = new PMA_Index($_REQUEST['index']);
        } else {
            $index = PMA_Index::singleton($db, $table, $_REQUEST['index']);
        }
    } else {
        $index = new PMA_Index;
    }

    return $index;
}

/**
 * Function to get the number of fields for the form
 *
 * @param PMA_Index $index index
 *
 * @return int
 */
function PMA_getNumberOfFieldsForForm($index)
{
    if (isset($_REQUEST['index']) && is_array($_REQUEST['index'])) {
        // coming already from form
        $add_fields
            = isset($_REQUEST['index']['columns']['names'])?
            count($_REQUEST['index']['columns']['names'])
            - $index->getColumnCount():0;
        if (isset($_REQUEST['add_fields'])) {
            $add_fields += $_REQUEST['added_fields'];
        }
    } elseif (isset($_REQUEST['create_index'])) {
        $add_fields = $_REQUEST['added_fields'];
    } else {
        $add_fields = 0;
    }// end preparing form values

    return $add_fields;
}

/**
 * Function to get form parameters
 *
 * @param string $db    current db
 * @param string $table current table
 *
 * @return array
 */
function PMA_getFormParameters($db, $table)
{
    $form_params = array(
        'db'    => $db,
        'table' => $table,
    );

    if (isset($_REQUEST['create_index'])) {
        $form_params['create_index'] = 1;
    } elseif (isset($_REQUEST['old_index'])) {
        $form_params['old_index'] = $_REQUEST['old_index'];
    } elseif (isset($_REQUEST['index'])) {
        $form_params['old_index'] = $_REQUEST['index'];
    }

    return $form_params;
}

/**
 * Function to get html for displaying the index form
 *
 * @param array     $fields      fields
 * @param PMA_Index $index       index
 * @param array     $form_params form parameters
 * @param int       $add_fields  number of fields in the form
 *
 * @return string
 */
function PMA_getHtmlForIndexForm($fields, $index, $form_params, $add_fields)
{
    $html = "";
    $html .= '<form action="tbl_indexes.php" method="post" name="index_frm" id="'
        . 'index_frm" class="ajax"'
        . 'onsubmit="if (typeof(this.elements[\'index[Key_name]\'].disabled) !='
        . ' \'undefined\') {'
        . 'this.elements[\'index[Key_name]\'].disabled = false}">';

    $html .= PMA_URL_getHiddenInputs($form_params);

    $html .= '<fieldset id="index_edit_fields">';

    $html .= '<div class="index_info">';

    $html .= '<div>'
        . '<div class="label">'
        . '<strong>'
        . '<label for="input_index_name">'
        . __('Index name:')
        . PMA_Util::showHint(
            PMA_Message::notice(
                __(
                    '"PRIMARY" <b>must</b> be the name of'
                    . ' and <b>only of</b> a primary key!'
                )
            )
        )
        . '</label>'
        . '</strong>'
        . '</div>'
        . '<input type="text" name="index[Key_name]" id="input_index_name"'
        . ' size="25"'
        . 'value="' . htmlspecialchars($index->getName()) . '"'
        . 'onfocus="this.select()" />'
        . '</div>';

    $html .= '<div>'
        . '<div class="label">'
        . '<strong>'
        . '<label for="select_index_choice">'
        . __('Index choice:')
        . PMA_Util::showMySQLDocu('ALTER_TABLE')
        . '</label>'
        . '</strong>'
        . '</div>'
        . $index->generateIndexChoiceSelector(isset($_REQUEST['create_edit_table']))
        . '</div>';

    $html .= PMA_Util::getDivForSliderEffect(
        'indexoptions', __('Options')
    );

    $html .= '<div>'
        . '<div class="label">'
        . '<strong>'
        . '<label for="input_key_block_size">'
        . __('Key block size:')
        . '</label>'
        . '</strong>'
        . '</div>'
        . '<input type="text" name="index[Key_block_size]" '
        . 'id="input_key_block_size" size="30" value="'
        . htmlspecialchars($index->getKeyBlockSize()) . '" />'
        . '</div>';

    $html .= '<div>'
        . '<div class="label">'
        . '<strong>'
        . '<label for="select_index_type">'
        . __('Index type:')
        . PMA_Util::showMySQLDocu('ALTER_TABLE')
        . '</label>'
        . '</strong>'
        . '</div>'
        . $index->generateIndexTypeSelector()
        . '</div>';

    $html .= '<div>'
        . '<div class="label">'
        . '<strong>'
        . '<label for="input_parser">'
        . __('Parser:')
        . '</label>'
        . '</strong>'
        . '</div>'
        . '<input type="text" name="index[Parser]" '
        . 'id="input_parse" size="30" value="' . htmlspecialchars($index->getParser()) . '" />'
        . '</div>';

    $html .= '<div>'
        . '<div class="label">'
        . '<strong>'
        . '<label for="input_index_comment">'
        . __('Comment:')
        . '</label>'
        . '</strong>'
        . '</div>'
        . '<input type="text" name="index[Index_comment]" '
        . 'id="input_index_comment" size="30"'
        . 'value="' . htmlspecialchars($index->getComment()) . '" />'
        . '</div>';

    $html .= '</div>'; // end of indexoptions div

    $html .= '<div class="clearfloat"></div>';

    $html .= '</div>';

    $html .= '<table id="index_columns">';

    $html .= '<thead>'
        . '<tr>'
        . '<th>' . __('Column') . '</th>'
        . '<th>' . __('Size') . '</th>'
        . '</tr>'
        . '</thead>';

    $odd_row = true;
    $spatial_types = array(
        'geometry', 'point', 'linestring', 'polygon', 'multipoint',
        'multilinestring', 'multipolygon', 'geomtrycollection'
    );
    $html .= '<tbody>';
    /* @var $column PMA_Index_Column */
    foreach ($index->getColumns() as $column) {
        $html .= '<tr class="';
        $html .= $odd_row ? 'odd' : 'even';
        $html .= 'noclick">';
        $html .= '<td><span class="drag_icon" title="' . __('Drag to reorder') . '"'
            . '></span>';
        $html .= '<select name="index[columns][names][]">';
        $html .= '<option value="">-- ' . __('Ignore') . ' --</option>';
        foreach ($fields as $field_name => $field_type) {
            if (($index->getChoice() != 'FULLTEXT'
                || preg_match('/(char|text)/i', $field_type))
                && ($index->getChoice() != 'SPATIAL'
                || in_array($field_type, $spatial_types))
            ) {
                $html .= '<option value="' . htmlspecialchars($field_name) . '"'
                    . (($field_name == $column->getName())
                    ? ' selected="selected"'
                    : '') . '>'
                    . htmlspecialchars($field_name) . ' ['
                    . htmlspecialchars($field_type) . ']'
                    . '</option>' . "\n";
            }
        } // end foreach $fields
        $html .= '</select>';
        $html .= '</td>';
        $html .= '<td>';
        $html .= '<input type="text" size="5" onfocus="this.select()"'
            . 'name="index[columns][sub_parts][]" value="';
        if ($index->getChoice() != 'SPATIAL') {
            $html .= $column->getSubPart();
        }
        $html .= '"/>';
        $html .= '</td>';
        $html .= '</tr>';
        $odd_row = !$odd_row;
    } // end foreach $edited_index_info['Sequences']

    for ($i = 0; $i < $add_fields; $i++) {
        $html .= '<tr class="';
        $html .= $odd_row ? 'odd' : 'even';
        $html .= 'noclick">';
        $html .= '<td><span class="drag_icon" title="' . __('Drag to reorder') . '"'
            . '></span>';
        $html .= '<select name="index[columns][names][]">';
        $html .= '<option value="">-- ' . __('Ignore') . ' --</option>';
        $j = 0;
        foreach ($fields as $field_name => $field_type) {
            if (isset($_REQUEST['create_edit_table'])) {
                $col_index = $field_type[1];
                $field_type = $field_type[0];
            }
            $html .= '<option value="'
                . htmlspecialchars((isset($col_index)) ? $col_index : $field_name)
                . '" ' . ($j++ == $i ? 'selected="selected"' : '') . '>'
                . htmlspecialchars($field_name) . ' ['
                . htmlspecialchars($field_type) . ']'
                . '</option>' . "\n";
        } // end foreach $fields
        $html .= '</select>';
        $html .= '</td>';
        $html .= '<td>'
            . '<input type="text" size="5" onfocus="this.select()"'
            . 'name="index[columns][sub_parts][]" value="" />'
            . '</td>';
        $html .= '</tr>';
        $odd_row = !$odd_row;
    } // end foreach $edited_index_info['Sequences']

    $html .= '</tbody>';

    $html .= '</table>';

    $html .= '<div class="add_more">';
    $btn_value = sprintf(__('Add %s column(s) to index'), 1);
    $html .= '<div class="slider"></div>';
    $html .= '<div class="add_fields hide">';
    $html .= '<input type="submit" id="add_fields" value="' . $btn_value . '" />';
    $html .= '</div>';
    $html .= '</div>';

    $html .= '</fieldset>';

    $html .= '<fieldset class="tblFooters">';
    $html .= '<button type="submit" id="preview_index_frm">' . __('Preview SQL') . '</button>';
    $html .= '<input type="submit" id="save_index_frm" value="' . __('Go') . '" />';
    $html .= '</fieldset>';

    $html .= '</form>';

    return $html;
}
?>
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