60 lines
1.4 KiB
Go
60 lines
1.4 KiB
Go
package sdp
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import "errors"
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// Direction is a marker for transmission directon of an endpoint
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type Direction int
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const (
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// DirectionSendRecv is for bidirectional communication
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DirectionSendRecv Direction = iota + 1
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// DirectionSendOnly is for outgoing communication
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DirectionSendOnly
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// DirectionRecvOnly is for incoming communication
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DirectionRecvOnly
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// DirectionInactive is for no communication
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DirectionInactive
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)
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const (
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directionSendRecvStr = "sendrecv"
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directionSendOnlyStr = "sendonly"
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directionRecvOnlyStr = "recvonly"
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directionInactiveStr = "inactive"
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directionUnknownStr = ""
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)
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var errDirectionString = errors.New("invalid direction string")
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// NewDirection defines a procedure for creating a new direction from a raw
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// string.
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func NewDirection(raw string) (Direction, error) {
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switch raw {
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case directionSendRecvStr:
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return DirectionSendRecv, nil
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case directionSendOnlyStr:
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return DirectionSendOnly, nil
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case directionRecvOnlyStr:
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return DirectionRecvOnly, nil
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case directionInactiveStr:
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return DirectionInactive, nil
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default:
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return Direction(unknown), errDirectionString
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}
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}
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func (t Direction) String() string {
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switch t {
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case DirectionSendRecv:
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return directionSendRecvStr
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case DirectionSendOnly:
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return directionSendOnlyStr
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case DirectionRecvOnly:
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return directionRecvOnlyStr
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case DirectionInactive:
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return directionInactiveStr
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default:
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return directionUnknownStr
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}
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}
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