oop: ExportJson
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Alex Marin
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09f1ae13bd
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libraries/plugins/export/ExportJson.class.php
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220
libraries/plugins/export/ExportJson.class.php
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<?php
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/* vim: set expandtab sw=4 ts=4 sts=4: */
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/**
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* Set of methods used to build dumps of tables as JSON
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*
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* @package PhpMyAdmin-Export
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* @subpackage JSON
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*/
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if (! defined('PHPMYADMIN')) {
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exit;
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}
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/* Get the export interface */
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require_once "libraries/plugins/ExportPlugin.class.php";
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/**
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* Handles the export for the JSON format
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*
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* @todo add descriptions for all vars/methods
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* @package PhpMyAdmin-Export
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*/
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class ExportJson extends ExportPlugin
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{
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/**
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* Constructor
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*/
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public function __construct()
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{
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$this->setProperties();
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}
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/**
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* Sets the export JSON properties
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*
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* @return void
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*/
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protected function setProperties()
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{
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$this->properties = array(
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'text' => 'JSON',
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'extension' => 'json',
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'mime_type' => 'text/plain',
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'options' => array(),
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'options_text' => __('Options')
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);
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$this->properties['options'] = array(
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array(
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'type' => 'begin_group',
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'name' => 'general_opts'
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),
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array(
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'type' => 'hidden',
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'name' => 'structure_or_data',
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),
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array(
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'type' => 'end_group'
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)
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);
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}
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/**
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* This method is called when any PluginManager to which the observer
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* is attached calls PluginManager::notify()
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*
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* @param SplSubject $subject The PluginManager notifying the observer
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* of an update.
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*
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* @return void
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*/
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public function update (SplSubject $subject)
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{
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}
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/**
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* Outputs export header
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*
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* @return bool Whether it succeeded
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*/
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public function exportHeader ()
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{
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// initialize the general export variables
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$this->initExportCommonVariables();
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PMA_exportOutputHandler(
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'/**' . $GLOBALS['crlf']
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. ' Export to JSON plugin for PHPMyAdmin' . $GLOBALS['crlf']
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. ' @version 0.1' . $GLOBALS['crlf']
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. ' */' . $GLOBALS['crlf'] . $GLOBALS['crlf']
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);
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return true;
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}
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/**
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* Outputs export footer
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*
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* @return bool Whether it succeeded
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*/
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public function exportFooter ()
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{
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return true;
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}
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/**
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* Outputs database header
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*
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* @param string $db Database name
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*
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* @return bool Whether it succeeded
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*/
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public function exportDBHeader ($db)
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{
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PMA_exportOutputHandler('// Database \'' . $db . '\'' . $GLOBALS['crlf']);
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return true;
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}
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/**
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* Outputs database footer
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*
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* @param string $db Database name
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*
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* @return bool Whether it succeeded
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*/
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public function exportDBFooter ($db)
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{
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return true;
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}
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/**
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* Outputs CREATE DATABASE statement
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*
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* @param string $db Database name
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*
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* @return bool Whether it succeeded
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*/
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public function exportDBCreate($db)
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{
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return true;
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}
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/**
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* Outputs the content of a table in CSV format
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*
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* @param string $db database name
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* @param string $table table name
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* @param string $crlf the end of line sequence
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* @param string $error_url the url to go back in case of error
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* @param string $sql_query SQL query for obtaining data
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*
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* @return bool Whether it succeeded
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*
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* @access public
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*/
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public function exportData($db, $table, $crlf, $error_url, $sql_query)
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{
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$result = PMA_DBI_query($sql_query, null, PMA_DBI_QUERY_UNBUFFERED);
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$columns_cnt = PMA_DBI_num_fields($result);
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// Get field information
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$fields_meta = PMA_DBI_get_fields_meta($result);
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for ($i = 0; $i < $columns_cnt; $i++) {
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$columns[$i] = stripslashes(PMA_DBI_field_name($result, $i));
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}
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unset($i);
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$buffer = '';
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$record_cnt = 0;
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while ($record = PMA_DBI_fetch_row($result)) {
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$record_cnt++;
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// Output table name as comment if this is the first record of the table
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if ($record_cnt == 1) {
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$buffer .= '// ' . $db . '.' . $table . $crlf . $crlf;
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$buffer .= '[{';
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} else {
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$buffer .= ', {';
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}
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for ($i = 0; $i < $columns_cnt; $i++) {
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$isLastLine = ($i + 1 >= $columns_cnt);
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$column = $columns[$i];
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if (is_null($record[$i])) {
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$buffer .= '"' . addslashes($column)
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. '": null'
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. (! $isLastLine ? ',' : '');
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} elseif ($fields_meta[$i]->numeric) {
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$buffer .= '"' . addslashes($column)
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. '": '
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. $record[$i]
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. (! $isLastLine ? ',' : '');
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} else {
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$buffer .= '"' . addslashes($column)
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. '": "'
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. addslashes($record[$i])
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. '"'
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. (! $isLastLine ? ',' : '');
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}
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}
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$buffer .= '}';
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}
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if ($record_cnt) {
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$buffer .= ']';
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}
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if (! PMA_exportOutputHandler($buffer)) {
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return false;
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}
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PMA_DBI_free_result($result);
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return true;
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}
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}
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?>
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