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137 lines
2.9 KiB
137 lines
2.9 KiB
// Copyright 2020 Justine Alexandra Roberts Tunney
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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// SIP Address Library
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//
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// For example:
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//
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// "Justine Tunney" <sip:jart@example.test;isup-oli=29>;tag=feedabee
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//
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// Roughly equates to:
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//
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// {Display: "Justine Tunney",
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// Params: {"tag": "feedabee"},
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// Uri: {Scheme: "sip",
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// User: "jart",
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// Pass: "",
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// Host: "example.test",
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// Port: "",
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// Params: {"isup-oli": "29"}}}
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//
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package sip
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import (
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"bytes"
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"github.com/jart/gosip/util"
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)
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// Represents a SIP Address Linked List
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type Addr struct {
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Uri *URI // never nil
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Display string // blank if not specified
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Param *Param // these look like ;key=lol;rport;key=wut
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Next *Addr // for comma separated lists of addresses
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}
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func (addr *Addr) String() string {
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var b bytes.Buffer
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addr.Append(&b)
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return b.String()
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}
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// Returns self if non-nil, otherwise other.
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func (addr *Addr) Or(other *Addr) *Addr {
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if addr == nil {
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return other
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}
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return addr
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}
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// Sets newly generated tag ID and returns self.
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func (addr *Addr) Tag() *Addr {
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addr.Param = &Param{"tag", util.GenerateTag(), addr.Param}
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return addr
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}
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// Reassembles a SIP address into a buffer.
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func (addr *Addr) Append(b *bytes.Buffer) {
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if addr == nil {
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return
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}
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if addr.Display != "" {
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appendQuoted(b, []byte(addr.Display))
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b.WriteByte(' ')
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}
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b.WriteByte('<')
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addr.Uri.Append(b)
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b.WriteByte('>')
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addr.Param.Append(b)
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if addr.Next != nil {
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b.WriteByte(',')
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b.WriteByte(' ')
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addr.Next.Append(b)
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}
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}
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// Deep copies a new Addr object.
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func (addr *Addr) Copy() *Addr {
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if addr == nil {
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return nil
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}
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res := new(Addr)
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res.Uri = addr.Uri.Copy()
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res.Param = addr.Param
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res.Next = addr.Next.Copy()
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return res
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}
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func (addr *Addr) CompareHostPort(other *Addr) bool {
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if addr != nil && other != nil {
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if addr.Uri.CompareHostPort(other.Uri) {
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return true
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}
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}
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return false
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}
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// Returns pointer to last addr in linked list.
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func (addr *Addr) Last() *Addr {
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if addr != nil {
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for ; addr.Next != nil; addr = addr.Next {
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}
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}
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return addr
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}
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// Returns number of items in the linked list.
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func (addr *Addr) Len() int {
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count := 0
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for ; addr != nil; addr = addr.Next {
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count++
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}
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return count
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}
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// Returns self with linked list reversed.
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func (addr *Addr) Reversed() *Addr {
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var res *Addr
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for ; addr != nil; addr = addr.Next {
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a := new(Addr)
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*a = *addr
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a.Next = res
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res = a
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}
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return res
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}
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