Implement curl_setopt array

src/FetchInit.php

@@ -0,0 +1,140 @@
+<?php
+namespace Gt\Fetch;
+
+use Gt\Http\RequestMethod;
+
+/**
+ * Converts a Fetch Init array to CURLOPT_* key-values.
+ *
+ * @see https://developer.mozilla.org/en-US/docs/Web/API/WindowOrWorkerGlobalScope/fetch#Syntax
+ */
+class FetchInit {
+	protected $curlOptArray;
+
+	public function __construct(array $init) {
+		$this->curlOptArray = [];
+
+		foreach($init as $key => $value) {
+			$function = "set" . ucfirst($key);
+			if(method_exists($this, $function)) {
+				call_user_func([$this, $function], $value);
+			}
+			else {
+// TODO: Throw exception - unknown key.
+			}
+		}
+	}
+
+	public function asCurlOptArray():array {
+		return $this->curlOptArray;
+	}
+
+	/**
+	 * @param string $value The request method, e.g., GET, POST.
+	 */
+	protected function setMethod(string $value) {
+		$this->curlOptArray[CURLOPT_CUSTOMREQUEST] =
+			RequestMethod::filterMethodName($value);
+	}
+
+	/**
+	 * @param array $headers Any headers you want to add to your request,
+	 * contained within an associative array.
+	 */
+	protected function setHeaders(array $headers):void {
+		$rawHeaders = [];
+
+		foreach($headers as $key => $value) {
+			$rawHeaders []= "$key: $value";
+		}
+
+		$this->curlOptArray[CURLOPT_HTTPHEADER] = $rawHeaders;
+	}
+
+	/**
+	 * @param string $body Any body that you want to add to your request:
+	 * this can be a string, associative array (form data) or binary object.
+	 */
+	protected function setBody($body):void {
+		$this->curlOptArray[CURLOPT_POSTFIELDS] = $body;
+	}
+
+	/**
+	 * @param string $value The mode you want to use for the request,
+	 * e.g., cors, no-cors, or same-origin
+	 */
+	protected function setMode(string $value):void {
+// TODO: Is this even possible to configure server-side?
+	}
+
+	/**
+	 * @param string $value The request credentials you want to use for the
+	 * request: omit, same-origin, or include. To automatically send
+	 * cookies for the current domain, this option must be provided.
+	 */
+	protected function setCredentials(string $value):void {
+// TODO: Throw exception until cookies are implemented.
+	}
+
+	/**
+	 * @param string $value The cache mode you want to use for the request.
+	 * @see https://developer.mozilla.org/en-US/docs/Web/API/Request/cache
+	 */
+	protected function setCache(string $value):void {
+// TODO: Throw exception until caching is implemented.
+	}
+
+	/**
+	 * @param string $value The redirect mode to use: follow (automatically
+	 * follow redirects) or manual (handle redirects manually).
+	 */
+	protected function setRedirect(string $value):void {
+		$this->curlOptArray[CURLOPT_FOLLOWLOCATION] =
+			strtolower($value) === "follow";
+	}
+
+	/**
+	 * @param string $value A string specifying no-referrer, client,
+	 * or a URL.
+	 */
+	protected function setReferrer(string $value):void {
+		switch(strtolower($value)) {
+		case "no-referrer":
+			$this->curlOptArray[CURLOPT_REFERER] = null;
+			break;
+
+		case "client":
+// TODO: What is the significance of "client".
+			break;
+
+		default:
+			$this->curlOptArray[CURLOPT_REFERER] = $value;
+			break;
+		}
+	}
+
+	/**
+	 * @param string $value Specifies the value of the referer HTTP header.
+	 * May be one of no-referrer, no-referrer-when-downgrade, origin,
+	 * origin-when-cross-origin, unsafe-url.
+	 */
+	protected function setReferrerPolicy(string $value):void {
+// TODO: Need to understand how this works on the server.
+	}
+
+	/**
+	 * @param string $value Contains the subresource integrity value of the
+	 * request (e.g., sha256-BpfBw7ivV8q2jLiT13fxDYAe2tJllusRSZ273h2nFSE=).
+	 */
+	protected function setIntegrity(string $value):void {
+// TODO: Set a value to later check on the request, throwing exception on mismatch.
+	}
+
+	protected function setKeepalive(string $value):void {
+		$this->curlOptArray[CURLOPT_TCP_KEEPALIVE] = (int)$value;
+	}
+
+	protected function setSignal(string $value):void {
+// TODO: Allow passing an AbortController to cancel a fetch early.
+	}
+}

src/Http.php

@@ -101,10 +101,8 @@ public function fetch($input, array $init = []):HttpPromise {
 // TODO: Set init keys from RequestInterface here.
 		}
 
-		$curlOptArray = [];
-		foreach($init as $key => $value) {
-// TODO: Convert fetch init values to curlOpt values here.
-		}
+		$fetchInit = new FetchInit($init);
+		$curlOptArray = $fetchInit->asCurlOptArray();
 
 		$this->requestResolver->add(
 			$uri,