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<?php /** * Plugin controller. * * @package PopupMaker * @copyright Copyright (c) 2024, Code Atlantic LLC */ namespace PopupMaker\Base; defined( 'ABSPATH' ) || exit; /** * HTTP Server-Sent Events (SSE) Stream class. * * Provides functionality for streaming real-time data to clients via SSE protocol. * Handles header configuration, buffer management, and message formatting. */ class Stream { /** * Stream name identifier for this SSE connection. * * @var non-empty-string */ protected $stream_name; /** * Stream class version. * * @var string */ const VERSION = '1.0.0'; /** * Stream constructor. * * @param non-empty-string $stream_name Stream name identifier. */ public function __construct( $stream_name = 'stream' ) { $this->stream_name = $stream_name; } /** * Start SSE stream. * * Configures PHP environment and sends initial headers for SSE connection. * Prevents execution if headers have already been sent. * * @return void */ public function start() { if ( headers_sent() ) { // Do not start the stream if headers have already been sent. return; } // Disable default disconnect checks. ignore_user_abort( true ); // phpcs:disable WordPress.PHP.IniSet.Risky, WordPress.PHP.NoSilencedErrors.Discouraged @ini_set( 'zlib.output_compression', '0' ); @ini_set( 'implicit_flush', '1' ); @ini_set( 'log_limit', '8096' ); @ob_end_clean(); set_time_limit( 0 ); // phpcs:enable WordPress.PHP.IniSet.Risky, WordPress.PHP.NoSilencedErrors.Discouraged $this->send_headers(); } /** * Send SSE headers. * * Sends required HTTP headers for Server-Sent Events protocol including * content type, stream name, caching directives, and connection settings. * * @return void */ public function send_headers() { header( 'Content-Type: text/event-stream' ); header( 'Stream-Name: ' . $this->stream_name ); header( 'Cache-Control: no-cache' ); header( 'Connection: keep-alive' ); // Nginx: unbuffered responses suitable for Comet and HTTP streaming applications. header( 'X-Accel-Buffering: no' ); $this->flush_buffers(); } /** * Flush buffers. * * Sends padding data to reach minimum buffer size for immediate flushing, * then flushes output buffers. Uses micro delay to prevent excessive flush rates. * * @return void */ protected function flush_buffers() { // This is for the buffer achieve the minimum size in order to flush data. // phpcs:ignore WordPress.Security.EscapeOutput.OutputNotEscaped echo str_repeat( ' ', 1024 * 8 ) . PHP_EOL; flush(); // Unless both are called. Some browsers will still cache. // Neccessary to prevent the stream from flushing too quickly. usleep( 1000 ); } /** * Send general message/data to the client. * * Formats and sends data via SSE protocol. Automatically encodes non-string * data as JSON. Follows SSE specification for data messages. * * @param string|int|float|bool|array<string, mixed>|object $data Data to send (string, array, object, scalar). * * @return void */ public function send_data( $data ) { $data = is_string( $data ) ? $data : \wp_json_encode( $data ); // phpcs:ignore WordPress.Security.EscapeOutput.OutputNotEscaped echo "data: {$data}" . PHP_EOL; echo PHP_EOL; $this->flush_buffers(); } /** * Send an event to the client. * * Sends a named event with optional data via SSE protocol. Follows SSE * specification for event messages with event type and data fields. * * @param non-empty-string $event Event name identifier. * @param string|int|float|bool|array<string, mixed>|object $data Data to send with the event (string, array, object, scalar). * * @return void */ public function send_event( $event, $data = '' ) { $data = is_string( $data ) ? $data : \wp_json_encode( $data ); // phpcs:ignore WordPress.Security.EscapeOutput.OutputNotEscaped echo "event: {$event}" . PHP_EOL; // phpcs:ignore WordPress.Security.EscapeOutput.OutputNotEscaped echo "data: {$data}" . PHP_EOL; echo PHP_EOL; $this->flush_buffers(); } /** * Send an error to the client. * * Sends error information as a specialized 'error' event. * Accepts either a simple error message string or structured error data. * * @param string|array{message: string, code?: int|string, details?: array<string, mixed>} $error Error message or structured error data. * * @return void */ public function send_error( $error ) { $this->send_event( 'error', $error ); } /** * Check if the connection should abort. * * Determines if the client has disconnected or the connection should be terminated. * Useful for long-running streams to detect client disconnection. * * @return bool True if connection is aborted, false if still active. */ public function should_abort() { return (bool) connection_aborted(); } }

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Blue GMC Sierra Denali truck driving on a scenic mountain road.

Value Your Trade

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White SUV parked on a road with a sunset sky background, showcasing modern design and sleek lines.

Service Specials

Welcome to Capital GMC BUICK – REGINA

Thank you for choosing Capital GMC Buick | Regina, your premier certified Buick and GMC dealership proudly serving drivers in Regina and the surrounding communities. Whether you’re searching for a brand-new Buick or GMC vehicle or a meticulously inspected pre-owned model, we have a diverse selection to match your needs and lifestyle.

Beyond our impressive inventory, we offer a seamless and stress-free financing experience through our well-connected finance centre, where our team of experts is dedicated to securing the best loan or lease options for you, quickly, transparently, and hassle-free.

But our commitment to you doesn’t stop at the sale. Our state-of-the-art service centre is staffed with skilled Buick and GMC technicians who use the latest equipment and genuine OEM parts to keep your vehicle running at its best. From routine maintenance to complex repairs, we’ve got you covered.

Experience top-tier customer service, quality vehicles, and expert care, all in one place. Visit Capital GMC Buick | Regina today or call us at 306-205-8072 with any questions. We’re here to help!

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