Lots of frame stubs

src/Frame/SettingsFrame.php

@@ -0,0 +1,51 @@
+<?php
+
+namespace NoccyLabs\React\Http2\Frame;
+
+class SettingsFrame extends Frame
+{
+    const SETTINGS_HEADER_TABLE_SIZE = 0x1;
+    const SETTINGS_ENABLE_PUSH = 0x2;
+    const SETTINGS_MAX_CONCURRENT_STREAMS = 0x3;
+    const SETTINGS_INITIAL_WINDOW_SIZE = 0x4;
+    const SETTINGS_MAX_FRAME_SIZE = 0x5;
+    const SETTINGS_MAX_HEADER_LIST_SIZE = 0x6;
+
+    protected int $frameType = self::FRAME_SETTINGS;
+
+    protected array $settings = [];
+
+    /**
+     * Set a setting to a specific value. This method intentionally does not do any bounds
+     * checking on the setting id to allow for extensions.
+     * 
+     * @param int $setting
+     * @param int $value
+     * @return self
+     */
+    public function set(int $setting, int $value): self
+    {
+        $this->settings[$setting] = $value;
+        return $this;
+    }
+
+    public function get(int $setting): ?int
+    {
+        return $this->settings[$setting]??null;
+    }
+
+    public function toBinary(): string
+    {
+        $packed = '';
+        foreach ($this->settings as $setting=>$value) {
+            $packed .= pack('vV', $setting, $value);
+        }
+        return $packed;
+    }
+
+    protected function fromBinary(string $data): void
+    {
+
+    }
+}
+