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package sdp
import (
"strconv"
"strings"
)
// Information describes the "i=" field which provides textual information
// about the session.
type Information string
func (i Information) String() string {
return string(i)
}
// ConnectionInformation defines the representation for the "c=" field
// containing connection data.
type ConnectionInformation struct {
NetworkType string
AddressType string
Address *Address
}
func (c ConnectionInformation) String() string {
parts := []string{c.NetworkType, c.AddressType}
if c.Address != nil && c.Address.String() != "" {
parts = append(parts, c.Address.String())
}
return strings.Join(parts, " ")
}
// Address desribes a structured address token from within the "c=" field.
type Address struct {
Address string
TTL *int
Range *int
}
func (c *Address) String() string {
var parts []string
parts = append(parts, c.Address)
if c.TTL != nil {
parts = append(parts, strconv.Itoa(*c.TTL))
}
if c.Range != nil {
parts = append(parts, strconv.Itoa(*c.Range))
}
return strings.Join(parts, "/")
}
// Bandwidth describes an optional field which denotes the proposed bandwidth
// to be used by the session or media.
type Bandwidth struct {
Experimental bool
Type string
Bandwidth uint64
}
func (b Bandwidth) String() string {
var output string
if b.Experimental {
output += "X-"
}
output += b.Type + ":" + strconv.FormatUint(b.Bandwidth, 10)
return output
}
// EncryptionKey describes the "k=" which conveys encryption key information.
type EncryptionKey string
func (s EncryptionKey) String() string {
return string(s)
}
// Attribute describes the "a=" field which represents the primary means for
// extending SDP.
type Attribute struct {
Key string
Value string
}
// NewPropertyAttribute constructs a new attribute
func NewPropertyAttribute(key string) Attribute {
return Attribute{
Key: key,
}
}
// NewAttribute constructs a new attribute
func NewAttribute(key, value string) Attribute {
return Attribute{
Key: key,
Value: value,
}
}
func (a Attribute) String() string {
output := a.Key
if len(a.Value) > 0 {
output += ":" + a.Value
}
return output
}
// IsICECandidate returns true if the attribute key equals "candidate".
func (a Attribute) IsICECandidate() bool {
return a.Key == "candidate"
}
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