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amigo.go
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amigo.go
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package amigo
import (
"errors"
"strings"
"sync"
"time"
"github.com/ivahaev/amigo/uuid"
log "github.com/ivahaev/go-logger"
)
// M is a short alias to map[string]string
type M map[string]string
type handlerFunc func(M)
// Amigo is a main package struct
type Amigo struct {
host string
port string
username string
secret string
ami *amiAdapter
events chan M
defaultChannel chan M
defaultHandler handlerFunc
handlers map[string]handlerFunc
capitalizeProps bool
mutex *sync.RWMutex
handlerMutex *sync.RWMutex
}
type agiCommand struct {
c chan M
dateTime time.Time
}
// TODO: implement function to clear old data in handlers.
var (
agiCommandsHandlers = make(map[string]agiCommand)
agiCommandsMutex = &sync.Mutex{}
)
// New create new Amigo struct with credentials provided and returns pointer to it
// Usage: New(username string, secret string, [host string, [port string]])
func New(username, secret string, params ...string) *Amigo {
var ami *amiAdapter
var events chan M
var host = "127.0.0.1"
var port = "5038"
if len(params) > 0 {
host = params[0]
if len(params) > 1 {
port = params[1]
}
}
return &Amigo{
host: host,
port: port,
username: username,
secret: secret,
ami: ami,
events: events,
handlers: map[string]handlerFunc{},
mutex: &sync.RWMutex{},
handlerMutex: &sync.RWMutex{},
}
}
// CapitalizeProps used to capitalise all prop's names when true provided.
func (a *Amigo) CapitalizeProps(c bool) {
a.capitalizeProps = c
}
// Action used to execute Actions in Asterisk. Returns immediately response from asterisk. Full response will follow.
// Usage amigo.Action(action map[string]string)
func (a *Amigo) Action(action map[string]string) (M, error) {
if a.Connected() {
a.mutex.Lock()
defer a.mutex.Unlock()
result := a.ami.Exec(action)
if a.capitalizeProps {
e := M{}
for k, v := range result {
e[strings.ToUpper(k)] = v
}
return e, nil
}
return result, nil
}
return nil, errors.New("Not connected to Asterisk")
}
// AgiAction used to execute Agi Actions in Asterisk. Returns full response.
// Usage amigo.AgiAction(channel, command string)
func (a *Amigo) AgiAction(channel, command string) (M, error) {
if !a.Connected() {
return nil, errors.New("Not connected to Asterisk")
}
commandID := uuid.NewV4()
action := M{
"Action": "AGI",
"Channel": channel,
"Command": command,
"CommandID": commandID,
}
ac := agiCommand{make(chan M), time.Now()}
agiCommandsMutex.Lock()
agiCommandsHandlers[commandID] = ac
agiCommandsMutex.Unlock()
a.mutex.Lock()
result := a.ami.Exec(action)
a.mutex.Unlock()
if result["Response"] != "Success" {
return result, errors.New("Fail with command")
}
result = <-ac.c
delete(result, "CommandID")
if a.capitalizeProps {
for k, v := range result {
result[strings.ToUpper(k)] = v
delete(result, k)
}
}
return result, nil
}
// Connect with Asterisk.
// If connect fails, will try to reconnect every second.
func (a *Amigo) Connect() {
var err error
for {
am, err := newAMIAdapter(a.host, a.port)
if err != nil {
log.Error("AMI Connect error", err.Error())
} else {
a.mutex.Lock()
a.ami = am
a.mutex.Unlock()
break
}
time.Sleep(time.Second)
}
log.Info("Connected to Asterisk", a.host, a.port)
events, err := a.ami.Login(a.username, a.secret)
a.mutex.Lock()
a.events = events
a.mutex.Unlock()
if err != nil {
log.Error("Asterisk login error", err.Error())
return
}
log.Info("Logged into Asterisk", a.host, a.port, a.username)
go func() {
for {
var e = <-a.events
a.handlerMutex.RLock()
if a.defaultChannel != nil {
go func(e M) {
a.defaultChannel <- e
}(e)
}
var event = strings.ToUpper(e["Event"])
if event != "" && (a.handlers[event] != nil || a.defaultHandler != nil) {
if a.capitalizeProps {
ev := M{}
for k, v := range e {
ev[strings.ToUpper(k)] = v
}
if a.handlers[event] != nil {
go a.handlers[event](ev)
}
if a.defaultHandler != nil {
go a.defaultHandler(ev)
}
} else {
if a.defaultHandler != nil {
go a.defaultHandler(e)
}
if a.handlers[event] != nil {
go a.handlers[event](e)
}
}
}
if event == "ASYNCAGI" {
commandID, ok := e["CommandID"]
if !ok {
a.handlerMutex.RUnlock()
continue
}
agiCommandsMutex.Lock()
ac, ok := agiCommandsHandlers[commandID]
if ok {
delete(agiCommandsHandlers, commandID)
agiCommandsMutex.Unlock()
ac.c <- e
} else {
agiCommandsMutex.Unlock()
}
}
a.handlerMutex.RUnlock()
}
}()
}
// Connected returns true if successfully connected and logged in Asterisk and false otherwise.
func (a *Amigo) Connected() bool {
a.mutex.RLock()
defer a.mutex.RUnlock()
return a.ami != nil && a.ami.Connected()
}
// RegisterDefaultHandler registers handler function that will called on each event
func (a *Amigo) RegisterDefaultHandler(f handlerFunc) error {
a.handlerMutex.Lock()
defer a.handlerMutex.Unlock()
if a.defaultHandler != nil {
return errors.New("DefaultHandler already registered")
}
a.defaultHandler = f
return nil
}
// RegisterHandler registers handler function for provided event name
func (a *Amigo) RegisterHandler(event string, f handlerFunc) error {
event = strings.ToUpper(event)
a.handlerMutex.Lock()
defer a.handlerMutex.Unlock()
if a.handlers[event] != nil {
return errors.New("Handler already registered")
}
a.handlers[event] = f
return nil
}
// SetEventChannel sets channel for receiving all events
func (a *Amigo) SetEventChannel(c chan M) {
a.handlerMutex.Lock()
defer a.handlerMutex.Unlock()
a.defaultChannel = c
}
// UnregisterDefaultHandler removes default handler function
func (a *Amigo) UnregisterDefaultHandler(f handlerFunc) error {
a.handlerMutex.Lock()
defer a.handlerMutex.Unlock()
if a.defaultHandler == nil {
return errors.New("DefaultHandler not registered")
}
a.defaultHandler = nil
return nil
}
// UnregisterHandler removes handler function for provided event name
func (a *Amigo) UnregisterHandler(event string, f handlerFunc) error {
event = strings.ToUpper(event)
a.handlerMutex.Lock()
defer a.handlerMutex.Unlock()
if a.handlers[event] == nil {
return errors.New("Handler not registered")
}
a.handlers[event] = nil
return nil
}