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<?php
/**
* Functions related to configuration management.
*/
/**
* Re-write configuration file according to given array.
* Requires mandatory fields listed in $MANDATORY_FIELDS.
*
* @param array $config contains all configuration fields.
* @param bool $isLoggedIn true if user is logged in.
*
* @return void
*
* @throws MissingFieldConfigException: a mandatory field has not been provided in $config.
* @throws UnauthorizedConfigException: user is not authorize to change configuration.
* @throws Exception: an error occured while writing the new config file.
*/
function writeConfig($config, $isLoggedIn)
{
// These fields are required in configuration.
$MANDATORY_FIELDS = [
'login', 'hash', 'salt', 'timezone', 'title', 'titleLink',
'redirector', 'disablesessionprotection', 'privateLinkByDefault'
];
if (!isset($config['config']['CONFIG_FILE'])) {
throw new MissingFieldConfigException('CONFIG_FILE');
}
// Only logged in user can alter config.
if (is_file($config['config']['CONFIG_FILE']) && !$isLoggedIn) {
throw new UnauthorizedConfigException();
}
// Check that all mandatory fields are provided in $config.
foreach ($MANDATORY_FIELDS as $field) {
if (!isset($config[$field])) {
throw new MissingFieldConfigException($field);
}
}
$configStr = '<?php '. PHP_EOL;
$configStr .= '$GLOBALS[\'login\'] = '.var_export($config['login'], true).';'. PHP_EOL;
$configStr .= '$GLOBALS[\'hash\'] = '.var_export($config['hash'], true).';'. PHP_EOL;
$configStr .= '$GLOBALS[\'salt\'] = '.var_export($config['salt'], true).'; '. PHP_EOL;
$configStr .= '$GLOBALS[\'timezone\'] = '.var_export($config['timezone'], true).';'. PHP_EOL;
$configStr .= 'date_default_timezone_set('.var_export($config['timezone'], true).');'. PHP_EOL;
$configStr .= '$GLOBALS[\'title\'] = '.var_export($config['title'], true).';'. PHP_EOL;
$configStr .= '$GLOBALS[\'titleLink\'] = '.var_export($config['titleLink'], true).'; '. PHP_EOL;
$configStr .= '$GLOBALS[\'redirector\'] = '.var_export($config['redirector'], true).'; '. PHP_EOL;
$configStr .= '$GLOBALS[\'disablesessionprotection\'] = '.var_export($config['disablesessionprotection'], true).'; '. PHP_EOL;
$configStr .= '$GLOBALS[\'privateLinkByDefault\'] = '.var_export($config['privateLinkByDefault'], true).'; '. PHP_EOL;
// Store all $config['config']
foreach ($config['config'] as $key => $value) {
$configStr .= '$GLOBALS[\'config\'][\''. $key .'\'] = '.var_export($config['config'][$key], true).';'. PHP_EOL;
}
$configStr .= '?>';
if (!file_put_contents($config['config']['CONFIG_FILE'], $configStr)
|| strcmp(file_get_contents($config['config']['CONFIG_FILE']), $configStr) != 0
) {
throw new Exception(
'Shaarli could not create the config file.
Please make sure Shaarli has the right to write in the folder is it installed in.'
);
}
}
/**
* Milestone 0.9 - shaarli/Shaarli#41: options.php is not supported anymore.
* ==> if user is loggedIn, merge its content with config.php, then delete options.php.
*
* @param array $config contains all configuration fields.
* @param bool $isLoggedIn true if user is logged in.
*
* @return void
*/
function mergeDeprecatedConfig($config, $isLoggedIn)
{
$config_file = $config['config']['CONFIG_FILE'];
if (is_file($config['config']['DATADIR'].'/options.php') && $isLoggedIn) {
include $config['config']['DATADIR'].'/options.php';
// Load GLOBALS into config
foreach ($GLOBALS as $key => $value) {
$config[$key] = $value;
}
$config['config']['CONFIG_FILE'] = $config_file;
writeConfig($config, $isLoggedIn);
unlink($config['config']['DATADIR'].'/options.php');
}
}
/**
* Exception used if a mandatory field is missing in given configuration.
*/
class MissingFieldConfigException extends Exception
{
public $field;
/**
* Construct exception.
*
* @param string $field field name missing.
*/
public function __construct($field)
{
$this->field = $field;
$this->message = 'Configuration value is required for '. $this->field;
}
}
/**
* Exception used if an unauthorized attempt to edit configuration has been made.
*/
class UnauthorizedConfigException extends Exception
{
/**
* Construct exception.
*/
public function __construct()
{
$this->message = 'You are not authorized to alter config.';
}
}
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