feat(gateway): repair native Apollo provider path

gateway/apollo_input.go

@@ -0,0 +1,90 @@
+package gateway
+
+import (
+	"encoding/binary"
+	"unicode/utf8"
+)
+
+const (
+	apolloChannelGeneric  = 0
+	apolloChannelUrgent   = 1
+	apolloChannelKeyboard = 2
+	apolloChannelMouse    = 3
+	apolloChannelUTF8     = 6
+	apolloChannelGamepad  = 16
+)
+
+type apolloInputPacket struct {
+	channel uint8
+	payload []byte
+}
+
+func encodeApolloInputEvent(event InputEvent) (apolloInputPacket, error) {
+	switch event.Device {
+	case "keyboard":
+		if event.Code < 0 || event.Code > 0xffff || len(event.Payload) > 1 {
+			return apolloInputPacket{}, ErrInputMalformed
+		}
+		packet := make([]byte, 14)
+		binary.BigEndian.PutUint32(packet[:4], 10)
+		if event.Pressed {
+			binary.LittleEndian.PutUint32(packet[4:8], 3)
+		} else {
+			binary.LittleEndian.PutUint32(packet[4:8], 4)
+		}
+		binary.LittleEndian.PutUint16(packet[9:11], uint16(event.Code))
+		if len(event.Payload) == 1 {
+			packet[11] = event.Payload[0]
+		}
+		return apolloInputPacket{channel: apolloChannelKeyboard, payload: packet}, nil
+	case "mouse-button":
+		if event.Code < 1 || event.Code > 8 || len(event.Payload) != 0 {
+			return apolloInputPacket{}, ErrInputMalformed
+		}
+		packet := make([]byte, 9)
+		binary.BigEndian.PutUint32(packet[:4], 5)
+		magic := uint32(8)
+		if !event.Pressed {
+			magic = 9
+		}
+		binary.LittleEndian.PutUint32(packet[4:8], magic)
+		packet[8] = byte(event.Code)
+		return apolloInputPacket{channel: apolloChannelMouse, payload: packet}, nil
+	case "mouse-relative":
+		if event.Pressed || len(event.Payload) != 4 {
+			return apolloInputPacket{}, ErrInputMalformed
+		}
+		packet := make([]byte, 12)
+		binary.BigEndian.PutUint32(packet[:4], 8)
+		binary.LittleEndian.PutUint32(packet[4:8], 7)
+		copy(packet[8:], event.Payload)
+		return apolloInputPacket{channel: apolloChannelMouse, payload: packet}, nil
+	case "utf8":
+		if event.Pressed || len(event.Payload) == 0 || len(event.Payload) > utf8.UTFMax || !utf8.Valid(event.Payload) || utf8.RuneCount(event.Payload) != 1 {
+			return apolloInputPacket{}, ErrInputMalformed
+		}
+		packet := make([]byte, 8+len(event.Payload))
+		binary.BigEndian.PutUint32(packet[:4], uint32(4+len(event.Payload)))
+		binary.LittleEndian.PutUint32(packet[4:8], 0x17)
+		copy(packet[8:], event.Payload)
+		return apolloInputPacket{channel: apolloChannelUTF8, payload: packet}, nil
+	case "controller":
+		if event.Code < 0 || event.Code > 15 || len(event.Payload) != 16 {
+			return apolloInputPacket{}, ErrInputMalformed
+		}
+		packet := make([]byte, 34)
+		binary.BigEndian.PutUint32(packet[:4], 30)
+		binary.LittleEndian.PutUint32(packet[4:8], 0x0c)
+		binary.LittleEndian.PutUint16(packet[8:10], 0x1a)
+		binary.LittleEndian.PutUint16(packet[10:12], uint16(event.Code))
+		copy(packet[12:14], event.Payload[:2])
+		binary.LittleEndian.PutUint16(packet[14:16], 0x14)
+		copy(packet[16:28], event.Payload[2:14])
+		binary.LittleEndian.PutUint16(packet[28:30], 0x9c)
+		copy(packet[30:32], event.Payload[14:16])
+		binary.LittleEndian.PutUint16(packet[32:34], 0x55)
+		return apolloInputPacket{channel: apolloChannelGamepad + uint8(event.Code), payload: packet}, nil
+	default:
+		return apolloInputPacket{}, ErrInputMalformed
+	}
+}