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SubscriptionStateParser.go
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/
SubscriptionStateParser.go
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package parser
import (
"github.com/tutuvss/sip/core"
"github.com/tutuvss/sip/header"
"strconv"
"strings"
)
/** SIPParser for SubscriptionState header.
*/
type SubscriptionStateParser struct {
HeaderParser
}
/** Creates a new instance of SubscriptionStateParser
* @param subscriptionState the header to parse
*/
func NewSubscriptionStateParser(subscriptionState string) *SubscriptionStateParser {
this := &SubscriptionStateParser{}
this.HeaderParser.super(subscriptionState)
return this
}
/** Constructor
* @param lexer the lexer to use to parse the header
*/
func NewSubscriptionStateParserFromLexer(lexer core.Lexer) *SubscriptionStateParser {
this := &SubscriptionStateParser{}
this.HeaderParser.superFromLexer(lexer)
return this
}
/** parse the String message
* @return SIPHeader (SubscriptionState object)
* @throws SIPParseException if the message does not respect the spec.
*/
func (this *SubscriptionStateParser) Parse() (sh header.Header, ParseException error) {
subscriptionState := header.NewSubscriptionState()
var ch byte
lexer := this.GetLexer()
this.HeaderName(TokenTypes_SUBSCRIPTION_STATE)
subscriptionState.SetHeaderName(core.SIPHeaderNames_SUBSCRIPTION_STATE)
// State:
lexer.Match(TokenTypes_ID)
token := lexer.GetNextToken()
subscriptionState.SetState(token.GetTokenValue())
for ch, _ = lexer.LookAheadK(0); ch == ';'; ch, _ = lexer.LookAheadK(0) {
lexer.Match(';')
lexer.SPorHT()
lexer.Match(TokenTypes_ID)
token = lexer.GetNextToken()
value := token.GetTokenValue()
if strings.ToLower(value) == "reason" {
lexer.Match('=')
lexer.SPorHT()
lexer.Match(TokenTypes_ID)
token = lexer.GetNextToken()
value = token.GetTokenValue()
subscriptionState.SetReasonCode(value)
} else if strings.ToLower(value) == "expires" {
lexer.Match('=')
lexer.SPorHT()
lexer.Match(TokenTypes_ID)
token = lexer.GetNextToken()
value = token.GetTokenValue()
var expires int
if expires, ParseException = strconv.Atoi(value); ParseException != nil {
return nil, ParseException
}
subscriptionState.SetExpires(expires)
} else if strings.ToLower(value) == "retry-after" {
lexer.Match('=')
lexer.SPorHT()
lexer.Match(TokenTypes_ID)
token = lexer.GetNextToken()
value = token.GetTokenValue()
var retryAfter int
if retryAfter, ParseException = strconv.Atoi(value); ParseException != nil {
return nil, ParseException
}
subscriptionState.SetRetryAfter(retryAfter)
} else {
lexer.Match('=')
lexer.SPorHT()
lexer.Match(TokenTypes_ID)
secondToken := lexer.GetNextToken()
secondValue := secondToken.GetTokenValue()
subscriptionState.SetParameter(value, secondValue)
}
lexer.SPorHT()
}
return subscriptionState, nil
}