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<?php
/**
* Set of methods used to build dumps of tables as JSON
*/
declare(strict_types=1);
namespace PhpMyAdmin\Plugins\Export;
use PhpMyAdmin\DatabaseInterface;
use PhpMyAdmin\Plugins\ExportPlugin;
use PhpMyAdmin\Properties\Options\Groups\OptionsPropertyMainGroup;
use PhpMyAdmin\Properties\Options\Groups\OptionsPropertyRootGroup;
use PhpMyAdmin\Properties\Options\Items\BoolPropertyItem;
use PhpMyAdmin\Properties\Options\Items\HiddenPropertyItem;
use PhpMyAdmin\Properties\Plugins\ExportPluginProperties;
use const JSON_PRETTY_PRINT;
use const JSON_UNESCAPED_UNICODE;
use function bin2hex;
use function explode;
use function json_encode;
use function stripslashes;
/**
* Handles the export for the JSON format
*/
class ExportJson extends ExportPlugin
{
/** @var bool */
private $first = true;
public function __construct()
{
parent::__construct();
$this->setProperties();
}
/**
* Encodes the data into JSON
*
* @param mixed $data Data to encode
*
* @return string
*/
public function encode($data)
{
$options = 0;
if (isset($GLOBALS['json_pretty_print'])
&& $GLOBALS['json_pretty_print']
) {
$options |= JSON_PRETTY_PRINT;
}
if (isset($GLOBALS['json_unicode'])
&& $GLOBALS['json_unicode']
) {
$options |= JSON_UNESCAPED_UNICODE;
}
return json_encode($data, $options);
}
/**
* Sets the export JSON properties
*
* @return void
*/
protected function setProperties()
{
$exportPluginProperties = new ExportPluginProperties();
$exportPluginProperties->setText('JSON');
$exportPluginProperties->setExtension('json');
$exportPluginProperties->setMimeType('text/plain');
$exportPluginProperties->setOptionsText(__('Options'));
// create the root group that will be the options field for
// $exportPluginProperties
// this will be shown as "Format specific options"
$exportSpecificOptions = new OptionsPropertyRootGroup(
'Format Specific Options'
);
// general options main group
$generalOptions = new OptionsPropertyMainGroup('general_opts');
// create primary items and add them to the group
$leaf = new HiddenPropertyItem('structure_or_data');
$generalOptions->addProperty($leaf);
$leaf = new BoolPropertyItem(
'pretty_print',
__('Output pretty-printed JSON (Use human-readable formatting)')
);
$generalOptions->addProperty($leaf);
$leaf = new BoolPropertyItem(
'unicode',
__('Output unicode characters unescaped')
);
$generalOptions->addProperty($leaf);
// add the main group to the root group
$exportSpecificOptions->addProperty($generalOptions);
// set the options for the export plugin property item
$exportPluginProperties->setOptions($exportSpecificOptions);
$this->properties = $exportPluginProperties;
}
/**
* Outputs export header
*
* @return bool Whether it succeeded
*/
public function exportHeader()
{
global $crlf;
$meta = [
'type' => 'header',
'version' => PMA_VERSION,
'comment' => 'Export to JSON plugin for PHPMyAdmin',
];
return $this->export->outputHandler(
'[' . $crlf . $this->encode($meta) . ',' . $crlf
);
}
/**
* Outputs export footer
*
* @return bool Whether it succeeded
*/
public function exportFooter()
{
global $crlf;
return $this->export->outputHandler(']' . $crlf);
}
/**
* Outputs database header
*
* @param string $db Database name
* @param string $db_alias Aliases of db
*
* @return bool Whether it succeeded
*/
public function exportDBHeader($db, $db_alias = '')
{
global $crlf;
if (empty($db_alias)) {
$db_alias = $db;
}
$meta = [
'type' => 'database',
'name' => $db_alias,
];
return $this->export->outputHandler(
$this->encode($meta) . ',' . $crlf
);
}
/**
* Outputs database footer
*
* @param string $db Database name
*
* @return bool Whether it succeeded
*/
public function exportDBFooter($db)
{
return true;
}
/**
* Outputs CREATE DATABASE statement
*
* @param string $db Database name
* @param string $export_type 'server', 'database', 'table'
* @param string $db_alias Aliases of db
*
* @return bool Whether it succeeded
*/
public function exportDBCreate($db, $export_type, $db_alias = '')
{
return true;
}
/**
* Outputs the content of a table in JSON format
*
* @param string $db database name
* @param string $table table name
* @param string $crlf the end of line sequence
* @param string $error_url the url to go back in case of error
* @param string $sql_query SQL query for obtaining data
* @param array $aliases Aliases of db/table/columns
*
* @return bool Whether it succeeded
*/
public function exportData(
$db,
$table,
$crlf,
$error_url,
$sql_query,
array $aliases = []
) {
global $dbi;
$db_alias = $db;
$table_alias = $table;
$this->initAlias($aliases, $db_alias, $table_alias);
if (! $this->first) {
if (! $this->export->outputHandler(',')) {
return false;
}
} else {
$this->first = false;
}
$buffer = $this->encode(
[
'type' => 'table',
'name' => $table_alias,
'database' => $db_alias,
'data' => '@@DATA@@',
]
);
return $this->doExportForQuery(
$dbi,
$sql_query,
$buffer,
$crlf,
$aliases,
$db,
$table
);
}
/**
* Export to JSON
*
* @return bool False on export fail and true on export end success
*
* @phpstan-param array{
* string: array{
* 'tables': array{
* string: array{
* 'columns': array{string: string}
* }
* }
* }
* }|array|null $aliases
*/
protected function doExportForQuery(
DatabaseInterface $dbi,
string $sql_query,
string $buffer,
string $crlf,
?array $aliases,
?string $db,
?string $table
): bool {
[$header, $footer] = explode('"@@DATA@@"', $buffer);
if (! $this->export->outputHandler($header . $crlf . '[' . $crlf)) {
return false;
}
$result = $dbi->query(
$sql_query,
DatabaseInterface::CONNECT_USER,
DatabaseInterface::QUERY_UNBUFFERED
);
$columns_cnt = $dbi->numFields($result);
$fieldsMeta = $dbi->getFieldsMeta($result);
$columns = [];
for ($i = 0; $i < $columns_cnt; $i++) {
$col_as = $dbi->fieldName($result, $i);
if ($db !== null && $table !== null && $aliases !== null
&& ! empty($aliases[$db]['tables'][$table]['columns'][$col_as])
) {
$col_as = $aliases[$db]['tables'][$table]['columns'][$col_as];
}
$columns[$i] = stripslashes($col_as);
}
$record_cnt = 0;
while ($record = $dbi->fetchRow($result)) {
$record_cnt++;
// Output table name as comment if this is the first record of the table
if ($record_cnt > 1) {
if (! $this->export->outputHandler(',' . $crlf)) {
return false;
}
}
$data = [];
for ($i = 0; $i < $columns_cnt; $i++) {
// 63 is the binary charset, see: https://dev.mysql.com/doc/internals/en/charsets.html
$isBlobAndIsBinaryCharset = $fieldsMeta[$i]->type === 'blob' && $fieldsMeta[$i]->charsetnr === 63;
// This can occur for binary fields
$isBinaryString = $fieldsMeta[$i]->type === 'string' && $fieldsMeta[$i]->charsetnr === 63;
if (
(
$fieldsMeta[$i]->type === 'geometry'
|| $isBlobAndIsBinaryCharset
|| $isBinaryString
)
&& $record[$i] !== null
) {
// export GIS and blob types as hex
$record[$i] = '0x' . bin2hex($record[$i]);
}
$data[$columns[$i]] = $record[$i];
}
$encodedData = $this->encode($data);
if (! $encodedData) {
return false;
}
if (! $this->export->outputHandler($encodedData)) {
return false;
}
}
if (! $this->export->outputHandler($crlf . ']' . $crlf . $footer . $crlf)) {
return false;
}
$dbi->freeResult($result);
return true;
}
/**
* Outputs result raw query in JSON format
*
* @param string $err_url the url to go back in case of error
* @param string $sql_query the rawquery to output
* @param string $crlf the end of line sequence
*
* @return bool if succeeded
*/
public function exportRawQuery(string $err_url, string $sql_query, string $crlf): bool
{
global $dbi;
$buffer = $this->encode(
[
'type' => 'raw',
'data' => '@@DATA@@',
]
);
return $this->doExportForQuery(
$dbi,
$sql_query,
$buffer,
$crlf,
null,
null,
null
);
}
}