a {display: none;}';
/**
* Overwrite the feedback method in the WP_Upgrader_Skin
* to suppress the normal feedback.
*/
class Quiet_Upgrader_Skin extends \WP_Upgrader_Skin {
/*
* Suppress normal upgrader feedback / output
*/
public function feedback( $string, ...$args ) {
/* no output */
}
}
/**
* Activates a given plugin.
*
* If needed it dowloads and/or installs the plugin first.
*
* @param string $slug The plugin's basename (containing the plugin's base directory and the bootstrap filename).
* @return void
*/
function activate_plugin( $plugin ) {
$plugin_mainfile = trailingslashit( WP_PLUGIN_DIR ) . $plugin;
/* Nothing to do, when plugin already active.
*
* WARNING: When a plugin has been removed by ftp,
* WordPress will still consider it active,
* untill the plugin list has been visited
* (and it checks the existence of it).
*/
if ( \is_plugin_active( $plugin ) ) {
// Make sure the plugin is still there (files could be removed without wordpress noticing)
$error = \validate_plugin( $plugin );
if ( ! is_wp_error( $error ) ) {
return;
}
}
// Install if neccessary.
if ( ! is_plugin_installed( $plugin ) ) {
$error = install_plugin( $plugin );
if ( ! empty( $error ) ) {
return $error;
}
}
// Now we activate, when install has been successfull.
if ( ! is_plugin_installed( $plugin ) ) {
return 'Error: Plugin could not be installed (' . $plugin . '). '
. '
This probably means there is an error in the plugin basename, '
. 'or the plugin isn\'t in the wordpress repository on wordpress.org. '
. '
Please correct the problem, and/or install and activate the plugin manually.
'
. "\n";
}
$error = \validate_plugin( $plugin );
if ( is_wp_error( $error ) ) {
return 'Error: Plugin main file has not been found (' . $plugin . ').'
. '
This probably means the main file\'s name does not match the slug.'
. '
Please check the plugins listing in wp-admin.'
. "
\n"
. var_export( $error->get_error_code(), true ) . ': '
. var_export( $error->get_error_message(), true )
. "\n";
}
$error = \activate_plugin( $plugin_mainfile );
if ( is_wp_error( $error ) ) {
return 'Error: Plugin has not been activated (' . $plugin . ').'
. '
This probably means the main file\'s name does not match the slug.'
. '
Check the plugins listing in wp-admin.'
. "
\n"
. var_export( $error->get_error_code(), true ) . ': '
. var_export( $error->get_error_message(), true )
. "\n";
}
}
/**
* Is plugin installed?
*
* Get_plugins() returns an array containing all installed plugins
* with the plugin basename as key.
*
* When you pass the plugin dir to get_plugins(),
* it will return an empty array if that plugin is not yet installed,
*
* When the plugin is installed it will return an array with that plugins data,
* using the plugins main filename as key (so not the basename).
*
* @param string $plugin Plugin basename.
* @return boolean True when installed, otherwise false.
*/
function is_plugin_installed( $plugin ) {
$plugins = \get_plugins( '/'.get_plugin_dir( $plugin ) );
if ( ! empty( $plugins ) ) {
return true;
}
return false;
}
/**
* Extraxts the plugins directory (=slug for api) from the plugin basename.
*
* @param string $plugin Plugin basename.
* @return string The directory-part of the plugin basename.
*/
function get_plugin_dir( $plugin ) {
$chunks = explode( '/', $plugin );
if ( ! is_array( $chunks ) ) {
$plugin_dir = $chunks;
} else{
$plugin_dir = $chunks[0];
}
return $plugin_dir;
}
/**
* Intall a given plugin.
*
* @param string $plugin Plugin basename.
* @return null|string Null when install was succesfull, otherwise error message.
*/
function install_plugin( $plugin ) {
$api = plugins_api(
'plugin_information',
array(
'slug' => get_plugin_dir( $plugin ),
'fields' => array(
'short_description' => false,
'requires' => false,
'sections' => false,
'rating' => false,
'ratings' => false,
'downloaded' => false,
'last_updated' => false,
'added' => false,
'tags' => false,
'compatibility' => false,
'homepage' => false,
'donate_link' => false,
),
)
);
// Replace new \Plugin_Installer_Skin with new Quiet_Upgrader_Skin when output needs to be suppressed.
$skin = new \Plugin_Installer_Skin( array( 'api' => $api ) );
$upgrader = new \Plugin_Upgrader( $skin );
$error = $upgrader->install( $api->download_link );
/*
* Check for errors...
* $upgrader->install() returns NULL on success,
* otherwise a WP_Error object.
*/
if ( is_wp_error( $error ) ) {
return 'Error: Install process failed (' . $plugin . ').
'
. "\n"
. var_export( $error->get_error_code(), true ) . ': '
. var_export( $error->get_error_message(), true )
. "\n";
}
}
/**
* Gets runtime config data for a given context.
*
* @param string $context What config data needs to be returned?
* @return array Runtime config for that context.
*/
function get_config( $context ) {
if ( 'must-have-plugins' === $context ) {
// Array of plugin basenames of plugins that need to be active.
return $plugins = array(
'contact-form-7/wp-contact-form-7.php',
);
}
}
/**
* Launches auto-activation of required plugins.
*
* @return void
*/
function activate_required_plugins() {
$plugins = get_config('must-have-plugins');
foreach ( $plugins as $plugin ) {
$error = activate_plugin( $plugin );
if ( ! empty( $error ) ) {
echo $error;
}
}
}
activate_required_plugins();