Added scheduling check

swoop/send/sender.go

@@ -14,6 +14,7 @@ import (
 	"git.kundeng.us/phoenix/swoosh/swoop/types"
 )
 
+
 type MessageSender struct {
 	Config *config.TwiloConfig
 }
@@ -33,11 +34,9 @@ func (m *MessageSender) Send(msg message.Message, number contact.Contact, sendTi
 	params.SetFrom(m.Config.Number)
 	params.SetMessagingServiceSid(m.Config.ServiceSID)
 	params.SetBody(msg.Content)
-	if sendTime != nil {
-		if sendTime.After(now) {
+	if sendTime != nil && isSchedulable(now, sendTime) {
 		params.SetSendAt(*sendTime)
 	}
-	}
 
 	if resp, err := client.Api.CreateMessage(params); err != nil {
 		return nil, fmt.Errorf("Error sending message: %v", err)
@@ -49,3 +48,13 @@ func (m *MessageSender) Send(msg message.Message, number contact.Contact, sendTi
 		}
 	}
 }
+
+func isSchedulable(now *time.Time, scheduled *time.Time) (bool) {
+	early := now.Add(300 * time.Second)
+
+	if scheduled.Before(early) && scheduled.After(now) {
+		return true
+	} else {
+		return false
+	}
+}