From 62f63ef0457aebb7fcdf2ebdde588208245545b5 Mon Sep 17 00:00:00 2001
From: Christian Kelly <christian.a.kelly@gmail.com>
Date: Wed, 8 May 2019 15:01:38 +0100
Subject: [PATCH] Adding clickatell support

---
 cmd/sachet/config.go              |  2 +
 cmd/sachet/main.go                |  3 ++
 provider/clickatell/clickatell.go | 63 +++++++++++++++++++++++++++++++
 3 files changed, 68 insertions(+)
 create mode 100644 provider/clickatell/clickatell.go

diff --git a/cmd/sachet/config.go b/cmd/sachet/config.go
index 3c5fef9..bcb3538 100644
--- a/cmd/sachet/config.go
+++ b/cmd/sachet/config.go
@@ -16,6 +16,7 @@ import (
 	"github.com/messagebird/sachet/provider/telegram"
 	"github.com/messagebird/sachet/provider/turbosms"
 	"github.com/messagebird/sachet/provider/twilio"
+	"github.com/messagebird/sachet/provider/clickatell"
 
 	"github.com/prometheus/alertmanager/template"
 	"gopkg.in/yaml.v2"
@@ -44,6 +45,7 @@ var config struct {
 		FreeMobile  freemobile.Config
 		AspSms      aspsms.Config
 		Sipgate     sipgate.Config
+		Clickatell  clickatell.ClickatellConfig
 	}
 
 	Receivers []ReceiverConf
diff --git a/cmd/sachet/main.go b/cmd/sachet/main.go
index 840489e..d1ebc3d 100644
--- a/cmd/sachet/main.go
+++ b/cmd/sachet/main.go
@@ -24,6 +24,7 @@ import (
 	"github.com/messagebird/sachet/provider/telegram"
 	"github.com/messagebird/sachet/provider/turbosms"
 	"github.com/messagebird/sachet/provider/twilio"
+	"github.com/messagebird/sachet/provider/clickatell"
 
 	"github.com/prometheus/alertmanager/template"
 	"github.com/prometheus/client_golang/prometheus"
@@ -174,6 +175,8 @@ func providerByName(name string) (sachet.Provider, error) {
 		return aspsms.NewAspSms(config.Providers.AspSms), nil
 	case "sipgate":
 		return sipgate.NewSipgate(config.Providers.Sipgate), nil
+	case "clickatell":
+		return clickatell.NewClickatell(config.Providers.Clickatell), nil
 	}
 
 	return nil, fmt.Errorf("%s: Unknown provider", name)
diff --git a/provider/clickatell/clickatell.go b/provider/clickatell/clickatell.go
new file mode 100644
index 0000000..d5f9d05
--- /dev/null
+++ b/provider/clickatell/clickatell.go
@@ -0,0 +1,63 @@
+package clickatell
+
+import (
+	"fmt"
+	"net/http"
+	"net/url"
+	"time"
+	"github.com/messagebird/sachet"
+)
+
+type ClickatellConfig struct {
+	User     string `yaml:"user"`
+	Password string `yaml:"password"`
+	ApiId    string `yaml:"api_id"`
+}
+
+const ClickatellRequestTimeout = time.Second * 60
+
+type Clickatell struct {
+	User     string
+	Password string
+	ApiId    string
+}
+
+func NewClickatell(config ClickatellConfig) *Clickatell {
+	Clickatell := &Clickatell{User: config.User, Password: config.Password, ApiId: config.ApiId}
+	return Clickatell
+}
+
+func (c *Clickatell) Send(message sachet.Message) (err error) {
+	for _, number := range message.To {
+		err = c.SendOne(message, number)
+		if err != nil {
+			return fmt.Errorf("Failed to make API call to clickatell:%s", err)
+		}
+	}
+	return
+}
+
+func (c *Clickatell) SendOne(message sachet.Message, PhoneNumber string) (err error) {
+	fmt.Printf("ALERT : %s\n", message.Text)
+	encoded_message := url.QueryEscape(message.Text)
+	smsURL := fmt.Sprintf("http://api.clickatell.com/http/sendmsg?user=%s&password=%s&api_id=%s&to=%s&text=%s", c.User, c.Password, c.ApiId, PhoneNumber, encoded_message)
+	var request *http.Request
+	var resp *http.Response
+	request, err = http.NewRequest("GET", smsURL, nil)
+	if err != nil {
+		return
+	}
+	httpClient := &http.Client{}
+	httpClient.Timeout = ClickatellRequestTimeout
+	resp, err = httpClient.Do(request)
+	if err != nil {
+		return
+	}
+	defer resp.Body.Close()
+	var body []byte
+	resp.Body.Read(body)
+	if resp.StatusCode == http.StatusOK && err == nil {
+		return
+	}
+	return fmt.Errorf("Failed sending sms:Reason: %s, StatusCode : %d", string(body), resp.StatusCode)
+}