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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.
$MANDATORY_FIELDS = array(
'login', 'hash', 'salt', 'timezone', 'title', 'titleLink',
'redirector', 'disablesessionprotection', 'privateLinkByDefault'
);
if (!isset($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'][$key], true).';'. PHP_EOL;
}
if (isset($config['plugins'])) {
foreach ($config['plugins'] as $key => $value) {
$configStr .= '$GLOBALS[\'plugins\'][\''. $key .'\'] = '.var_export($config['plugins'][$key], true).';'. PHP_EOL;
}
}
if (!file_put_contents($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.'
);
}
}
/**
* Process plugin administration form data and save it in an array.
*
* @param array $formData Data sent by the plugin admin form.
*
* @return array New list of enabled plugin, ordered.
*
* @throws PluginConfigOrderException Plugins can't be sorted because their order is invalid.
*/
function save_plugin_config($formData)
{
// Make sure there are no duplicates in orders.
if (!validate_plugin_order($formData)) {
throw new PluginConfigOrderException();
}
$plugins = array();
$newEnabledPlugins = array();
foreach ($formData as $key => $data) {
if (startsWith($key, 'order')) {
continue;
}
// If there is no order, it means a disabled plugin has been enabled.
if (isset($formData['order_' . $key])) {
$plugins[(int) $formData['order_' . $key]] = $key;
}
else {
$newEnabledPlugins[] = $key;
}
}
// New enabled plugins will be added at the end of order.
$plugins = array_merge($plugins, $newEnabledPlugins);
// Sort plugins by order.
if (!ksort($plugins)) {
throw new PluginConfigOrderException();
}
$finalPlugins = array();
// Make plugins order continuous.
foreach ($plugins as $plugin) {
$finalPlugins[] = $plugin;
}
return $finalPlugins;
}
/**
* Validate plugin array submitted.
* Will fail if there is duplicate orders value.
*
* @param array $formData Data from submitted form.
*
* @return bool true if ok, false otherwise.
*/
function validate_plugin_order($formData)
{
$orders = array();
foreach ($formData as $key => $value) {
// No duplicate order allowed.
if (in_array($value, $orders)) {
return false;
}
if (startsWith($key, 'order')) {
$orders[] = $value;
}
}
return true;
}
/**
* Affect plugin parameters values into plugins array.
*
* @param mixed $plugins Plugins array ($plugins[<plugin_name>]['parameters']['param_name'] = <value>.
* @param mixed $config Plugins configuration.
*
* @return mixed Updated $plugins array.
*/
function load_plugin_parameter_values($plugins, $config)
{
$out = $plugins;
foreach ($plugins as $name => $plugin) {
if (empty($plugin['parameters'])) {
continue;
}
foreach ($plugin['parameters'] as $key => $param) {
if (!empty($config[$key])) {
$out[$name]['parameters'][$key] = $config[$key];
}
}
}
return $out;
}
/**
* 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.';
}
}
/**
* Exception used if an error occur while saving plugin configuration.
*/
class PluginConfigOrderException extends Exception
{
/**
* Construct exception.
*/
public function __construct()
{
$this->message = 'An error occurred while trying to save plugins loading order.';
}
}
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