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| Name | Lines | Methods | CRAP | ||||
|---|---|---|---|---|---|---|---|
| __construct | 100.00% | 1 / 1 | 100.00% | 1 / 1 | 1 | ||
| toSSE | 80.00% | 12 / 15 | 0.00% | 0 / 1 | 6.29 | ||
| output | 0.00% | 0 / 1 | 0.00% | 0 / 1 | 2 | ||
| error | 0.00% | 0 / 1 | 0.00% | 0 / 1 | 2 | ||
| progress | 0.00% | 0 / 6 | 0.00% | 0 / 1 | 2 | ||
| complete | 0.00% | 0 / 1 | 0.00% | 0 / 1 | 2 | ||
| data | 100.00% | 1 / 1 | 100.00% | 1 / 1 | 1 | ||
| 26 | readonly final class Event | |
| 27 | { | |
| 28 | /** | |
| 29 | * @param string $type Event name, emitted as the "event:" field. An | |
| 30 | * empty string omits the field entirely, so the | |
| 31 | * browser dispatches the event to its default | |
| 32 | * "message" handler (addEventListener('message')). | |
| 33 | * @param array $data Event payload. JSON-encoded and emitted as one | |
| 34 | * or more "data:" lines (multi-line JSON is split | |
| 35 | * per line, as the SSE spec requires). | |
| 36 | * @param string|null $id Optional SSE "id:" field — a cursor the | |
| 37 | * browser sends back on reconnection (Last-Event-ID), | |
| 38 | * letting the server resume from where it left off. | |
| 39 | * @param int|null $retry Optional SSE "retry:" field — reconnection | |
| 40 | * delay in milliseconds the browser should use | |
| 41 | * if the connection drops. | |
| 42 | */ | |
| 43 | public function __construct( | |
| 44 | public string $type, | |
| 45 | public array $data, | |
| 46 | public ?string $id = null, | |
| 47 | public ?int $retry = null | |
| 48 | ) {} | |
| 49 | ||
| 50 | /** | |
| 51 | * Serialize this event to the SSE wire format. | |
| 52 | * | |
| 53 | * Field order is fixed (id, retry, event, data) and each field is | |
| 54 | * terminated with a newline. The event ends with a blank line, which is | |
| 55 | * what tells the browser "this event is complete". The payload is | |
| 56 | * JSON-encoded; if it contains newlines, each line is emitted as its | |
| 57 | * own "data:" field (the spec concatenates them back with \n on the | |
| 58 | * client side). | |
| 59 | * | |
| 60 | * @return string The complete SSE event, including the trailing blank line. | |
| 61 | * @throws \RuntimeException If the payload cannot be JSON-encoded | |
| 62 | * (e.g. invalid UTF-8 or depth overflow). | |
| 63 | */ | |
| 64 | public function toSSE(): string | |
| 65 | { | |
| 66 | $output = ''; | |
| 67 | ||
| 68 | if ($this->id !== null) { | |
| 69 | $output .= "id: {$this->id}\n"; | |
| 70 | } | |
| 71 | ||
| 72 | if ($this->retry !== null) { | |
| 73 | $output .= "retry: {$this->retry}\n"; | |
| 74 | } | |
| 75 | ||
| 76 | if ($this->type !== '') { | |
| 77 | $output .= "event: {$this->type}\n"; | |
| 78 | } | |
| 79 | ||
| 80 | // Handle multi-line data | |
| 81 | $jsonData = json_encode($this->data); | |
| 82 | if ($jsonData === false) { | |
| 83 | throw new \RuntimeException('Unable to JSON-encode event data: ' . json_last_error_msg()); | |
| 84 | } | |
| 85 | $lines = explode("\n", $jsonData); | |
| 86 | foreach ($lines as $line) { | |
| 87 | $output .= "data: {$line}\n"; | |
| 88 | } | |
| 89 | ||
| 90 | $output .= "\n"; | |
| 91 | ||
| 92 | return $output; | |
| 93 | } | |
| 94 | ||
| 95 | /** | |
| 96 | * Create an "output" event — a single line of free-form output. | |
| 97 | * | |
| 98 | * Useful for streaming command/process output to a terminal-style UI. | |
| 99 | * | |
| 100 | * @param string $line The output line to send | |
| 101 | * @param string|null $id Optional SSE id (see constructor). | |
| 102 | * @return self | |
| 103 | */ | |
| 104 | public static function output(string $line, ?string $id = null): self | |
| 105 | { | |
| 106 | return new self('output', ['line' => $line], $id); | |
| 107 | } | |
| 108 | /** | |
| 109 | * Create an "error" event — a failure message. | |
| 110 | * | |
| 111 | * @param string $message The error description | |
| 112 | * @param string|null $id Optional SSE id (see constructor). | |
| 113 | * @return self | |
| 114 | */ | |
| 115 | public static function error(string $message, ?string $id = null): self | |
| 116 | { | |
| 117 | return new self('error', ['message' => $message], $id); | |
| 118 | } | |
| 119 | /** | |
| 120 | * Create a "progress" event — a progress report for a long-running job. | |
| 121 | * | |
| 122 | * Includes the current/total counts and a pre-computed percentage, so | |
| 123 | * clients can render a progress bar without doing the math themselves. | |
| 124 | * | |
| 125 | * @param int $current Units completed so far | |
| 126 | * @param int $total Total units to complete | |
| 127 | * @param string|null $message Optional human-readable status text | |
| 128 | * @param string|null $id Optional SSE id (see constructor). | |
| 129 | * @return self | |
| 130 | */ | |
| 131 | public static function progress(int $current, int $total, ?string $message = null, ?string $id = null): self | |
| 132 | { | |
| 133 | return new self('progress', [ | |
| 134 | 'current' => $current, | |
| 135 | 'total' => $total, | |
| 136 | 'percentage' => round(($current / $total) * 100, 2), | |
| 137 | 'message' => $message | |
| 138 | ], $id); | |
| 139 | } | |
| 140 | ||
| 141 | /** | |
| 142 | * Create a "complete" event — signals that a job finished successfully. | |
| 143 | * | |
| 144 | * @param array $data Optional final payload (e.g. results, totals). | |
| 145 | * @param string|null $id Optional SSE id (see constructor). | |
| 146 | * @return self | |
| 147 | */ | |
| 148 | public static function complete(array $data = [], ?string $id = null): self | |
| 149 | { | |
| 150 | return new self('complete', $data, $id); | |
| 151 | } | |
| 152 | /** | |
| 153 | * Create a custom-named event with an arbitrary payload. | |
| 154 | * | |
| 155 | * The general-purpose factory: pick any event name and the browser can | |
| 156 | * listen for it with addEventListener('<type>', ...). For the spec's | |
| 157 | * default "message" handler, pass '' as the type. | |
| 158 | * | |
| 159 | * @param string $type Event name; '' omits the "event:" field (see | |
| 160 | * constructor). | |
| 161 | * @param array $data Arbitrary payload, JSON-encoded on the wire | |
| 162 | * @param string|null $id Optional SSE id (see constructor). | |
| 163 | * @return self | |
| 164 | */ | |
| 165 | public static function data(string $type, array $data, ?string $id = null): self | |
| 166 | { | |
| 167 | return new self($type, $data, $id); | |
| 168 | } | |
| 169 | } |