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deliverycenter.go
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deliverycenter.go
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package notificationdelivery
import (
"sort"
"sync/atomic"
"time"
"github.com/herb-go/notification"
)
//DeliveryCenter delivery center interface.
//Delivery center manages delivery servers by delivery keyword.
type DeliveryCenter interface {
//List all delivery servers in delivery center and any error if raised.
List() ([]*DeliveryServer, error)
//Get get delivery server by keyword and return any error if rasied.
//Notification.ErrDeliveryNotFound should be returned if give keyword not found.
Get(keyword string) (*DeliveryServer, error)
}
//PlainDeliveryCenter plain delivery center type
type PlainDeliveryCenter map[string]*DeliveryServer
//List all delivery servers in delivery center and any error if raised.
//Result will be sorted by delivery.
func (c PlainDeliveryCenter) List() ([]*DeliveryServer, error) {
var keys = make([]string, 0, len(c))
for k := range c {
keys = append(keys, k)
}
sort.Strings(keys)
var result = make([]*DeliveryServer, len(keys))
for k, v := range keys {
result[k] = c[v]
}
return result, nil
}
//Get get delivery server by keyword and return any error if rasied.
//Notification.ErrDeliveryNotFound should be returned if give keyword not found.
func (c PlainDeliveryCenter) Get(id string) (*DeliveryServer, error) {
s, ok := c[id]
if !ok || s == nil {
return nil, NewErrDeliveryNotFound(id)
}
return s, nil
}
//Insert insert delivery server to c
func (c PlainDeliveryCenter) Insert(d *DeliveryServer) {
c[d.Delivery] = d
}
//NewPlainDeliveryCenter create new plain delivery center
func NewPlainDeliveryCenter() PlainDeliveryCenter {
return PlainDeliveryCenter{}
}
//AtomicDeliveryCenter delivery center which use atomic.Value to implement concurrently update.
type AtomicDeliveryCenter struct {
data atomic.Value
}
//SetDeliveryCenter atomicly update delivery center.
func (c *AtomicDeliveryCenter) SetDeliveryCenter(pc DeliveryCenter) {
c.data.Store(pc)
}
//DeliveryCenter return delivery center actually used.
func (c *AtomicDeliveryCenter) DeliveryCenter() DeliveryCenter {
return c.data.Load().(DeliveryCenter)
}
//List all delivery servers in delivery center and any error if raised.
func (c *AtomicDeliveryCenter) List() ([]*DeliveryServer, error) {
return c.DeliveryCenter().List()
}
//Get get delivery server by keyword and return any error if rasied.
//Notification.ErrDeliveryNotFound should be returned if give keyword not found.
func (c *AtomicDeliveryCenter) Get(id string) (*DeliveryServer, error) {
return c.DeliveryCenter().Get(id)
}
//NewAtomicDeliveryCenter create new atomic delivery cemter.
func NewAtomicDeliveryCenter() *AtomicDeliveryCenter {
c := &AtomicDeliveryCenter{}
c.SetDeliveryCenter(NewPlainDeliveryCenter())
return c
}
//Deliver delivery content to delivery center with given keyword
//Return delivery status,receipt and any error if raised.
func Deliver(c DeliveryCenter, delivery string, content notification.Content) (status DeliveryStatus, receipt string, err error) {
d, err := c.Get(delivery)
if err != nil {
if IsErrDeliveryNotFound(err) {
return DeliveryStatusAbort, err.Error(), nil
}
return 0, "", err
}
return d.Deliver(content)
}
//DeliverNotification notification to delivery center with given keyword
//Return delivery status,receipt and any error if raised.
func DeliverNotification(c DeliveryCenter, n *notification.Notification) (status DeliveryStatus, receipt string, err error) {
if n.ExpiredTime > 0 && n.ExpiredTime <= time.Now().Unix() {
return DeliveryStatusExpired, "", nil
}
return Deliver(c, n.Delivery, n.Content)
}