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<?php |
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namespace Wordlift\Features; |
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class Response_Adapter { |
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const WL_FEATURES = '_wl_features'; |
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const WL_1 = 'wl1'; |
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/** |
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* @var \Wordlift_Log_Service |
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*/ |
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private $log; |
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function __construct() { |
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$this->log = \Wordlift_Log_Service::get_logger( get_class() ); |
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// Filter responses from the API calls to update the enabled features. |
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add_filter( 'wl_api_service__response', array( $this, 'response' ), 10, 1 ); |
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// Initialize from `$_ENV`: this is currently required for Unit Tests, since `tests/bootstrap.php` loads WordLift |
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// before it can actually query the enabled features via HTTP (mock), which would prevent files from being included. |
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// $this->init_from_env(); |
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// Register the `wl_features__enable__{feature-name}` filters. |
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$this->register_filters(); |
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// Hook to updates to the features setting to refresh the features' filters. |
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add_action( 'update_option_' . self::WL_FEATURES, array( $this, 'register_filters' ), 10, 0 ); |
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} |
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function response( $response ) { |
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$headers = wp_remote_retrieve_headers( $response ); |
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// Bail out if the `wl1` header isn't defined. |
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if ( ! isset( $headers[ self::WL_1 ] ) ) { |
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return $response; |
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} |
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$wl1_as_base64_string = $headers[ self::WL_1 ]; |
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$wl1 = json_decode( base64_decode( $wl1_as_base64_string ), true ); |
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$this->log->debug( "WL1 [ encoded :: $wl1_as_base64_string ] " . var_export( $wl1, true ) ); |
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// Update the feature flags. There's no need to check here if values differ (thus avoiding a call to db), since |
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// WordPress does that in `update_option`. |
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if ( isset( $wl1['features'] ) ) { |
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if ( update_option( self::WL_FEATURES, (array) $wl1['features'], true ) ) { |
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$this->register_filters(); |
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} |
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} |
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return $response; |
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} |
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/** |
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* Registers the feature filters. |
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*/ |
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function register_filters() { |
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$this->log->debug( 'Registering feature filters...' ); |
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foreach ( (array) get_option( self::WL_FEATURES, array() ) as $name => $enabled ) { |
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// Remove previous filters. |
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remove_filter( "wl_feature__enable__${name}", '__return_true' ); |
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remove_filter( "wl_feature__enable__${name}", '__return_false' ); |
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$callback = ( $enabled ? '__return_true' : '__return_false' ); |
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add_filter( "wl_feature__enable__${name}", $callback ); |
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} |
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} |
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private function init_from_env() { |
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$features = array_reduce( array_filter( array_keys( $_ENV ), function ( $key ) { |
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return preg_match( '~^WL_FEATURES__.*~', $key ); |
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} ), function ( $features, $env ) { |
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$name = strtolower( str_replace( '_', '-', substr( $env, strlen( 'WL_FEATURES__' ) ) ) ); |
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$value = wp_validate_boolean( getenv( $env ) ); |
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$features[ $name ] = $value; |
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return $features; |
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}, array() ); |
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update_option( self::WL_FEATURES, (array) $features, true ); |
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} |
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} |
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Adding explicit visibility (
private,protected, orpublic) is generally recommend to communicate to other developers how, and from where this method is intended to be used.