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server/vendor/github.com/pion/sdp/v3/direction.go

@@ -0,0 +1,62 @@
+// SPDX-FileCopyrightText: 2023 The Pion community <https://pion.ly>
+// SPDX-License-Identifier: MIT
+
+package sdp
+
+import "errors"
+
+// Direction is a marker for transmission directon of an endpoint
+type Direction int
+
+const (
+	// DirectionSendRecv is for bidirectional communication
+	DirectionSendRecv Direction = iota + 1
+	// DirectionSendOnly is for outgoing communication
+	DirectionSendOnly
+	// DirectionRecvOnly is for incoming communication
+	DirectionRecvOnly
+	// DirectionInactive is for no communication
+	DirectionInactive
+)
+
+const (
+	directionSendRecvStr = "sendrecv"
+	directionSendOnlyStr = "sendonly"
+	directionRecvOnlyStr = "recvonly"
+	directionInactiveStr = "inactive"
+	directionUnknownStr  = ""
+)
+
+var errDirectionString = errors.New("invalid direction string")
+
+// NewDirection defines a procedure for creating a new direction from a raw
+// string.
+func NewDirection(raw string) (Direction, error) {
+	switch raw {
+	case directionSendRecvStr:
+		return DirectionSendRecv, nil
+	case directionSendOnlyStr:
+		return DirectionSendOnly, nil
+	case directionRecvOnlyStr:
+		return DirectionRecvOnly, nil
+	case directionInactiveStr:
+		return DirectionInactive, nil
+	default:
+		return Direction(unknown), errDirectionString
+	}
+}
+
+func (t Direction) String() string {
+	switch t {
+	case DirectionSendRecv:
+		return directionSendRecvStr
+	case DirectionSendOnly:
+		return directionSendOnlyStr
+	case DirectionRecvOnly:
+		return directionRecvOnlyStr
+	case DirectionInactive:
+		return directionInactiveStr
+	default:
+		return directionUnknownStr
+	}
+}