Initial slack notification work

pkg/plugin/notify/notification.go

@@ -32,6 +32,7 @@ type Notification struct {
 	Webhook *Webhook `yaml:"webhook,omitempty"`
 	Hipchat *Hipchat `yaml:"hipchat,omitempty"`
 	Irc     *IRC     `yaml:"irc,omitempty"`
+	Slack   *Slack   `yaml:"slack,omitempty"`
 }
 
 func (n *Notification) Send(context *Context) error {
@@ -55,5 +56,10 @@ func (n *Notification) Send(context *Context) error {
 		n.Irc.Send(context)
 	}
 
+	// send slack notifications
+	if n.Slack != nil {
+		n.Slack.Send(context)
+	}
+
 	return nil
 }

pkg/plugin/notify/slack.go

@@ -0,0 +1,87 @@
+package notify
+
+import (
+	"bytes"
+	"encoding/json"
+	"net/http"
+
+	"github.com/drone/drone/pkg/model"
+)
+
+const (
+	slackEndpoint  = "https://%s.slack.com/services/hooks/incoming-webhook?token=%s"
+	startedMessage = "Building %s, commit %s, author %s"
+	successMessage = "<b>Success</b> %s, commit %s, author %s"
+	failureMessage = "<b>Failed</b> %s, commit %s, author %s"
+)
+
+type Slack struct {
+	Team     string `yaml:"team,omitempty"`
+	Channel  string `yaml:"channel,omitempty"`
+	Username string `yaml:"username,omitempty"`
+	Token    string `yaml:"token,omitempty"`
+	Started  bool   `yaml:"on_started,omitempty"`
+	Success  bool   `yaml:"on_success,omitempty"`
+	Failure  bool   `yaml:"on_failure,omitempty"`
+}
+
+func (s *Slack) Send(context *Context) error {
+	switch {
+	case context.Commit.Status == "Started" && s.Started:
+		return s.sendStarted(context)
+	case context.Commit.Status == "Success" && s.Success:
+		return s.sendSuccess(context)
+	case context.Commit.Status == "Failure" && s.Failure:
+		return s.sendFailure(context)
+	}
+
+	return nil
+}
+
+func (s *Slack) sendStarted(context *Context) error {
+	msg := fmt.Sprintf(startedMessage, context.Repo.Name, context.Commit.HashShort(), context.Commit.Author)
+	return s.send(msg)
+}
+
+func (s *Slack) sendSuccess(context *Context) error {
+	msg := fmt.Sprintf(successMessage, context.Repo.Name, context.Commit.HashShort(), context.Commit.Author)
+	return s.send(msg)
+}
+
+func (s *Slack) sendFailure(context *Context) error {
+	msg := fmt.Sprintf(failureMessage, context.Repo.Name, context.Commit.HashShort(), context.Commit.Author)
+	return s.send(msg)
+}
+
+// helper function to send HTTP requests
+func (s *Slack) send(msg string) error {
+	// data will get posted in this format
+	data := struct {
+		Channel  string `json:"channel"`
+		Username string `json:"username"`
+		Text     string `json:"text"`
+	}{s.Channel, s.Username, msg}
+
+	// data json encoded
+	payload, err := json.Marshal(data)
+	if err != nil {
+		return err
+	}
+
+	// send payload
+	url = fmt.Sprintf(slackEndpoint, s.Team, s.Token)
+	go sendJson(url, payload)
+
+	return nil
+}
+
+// helper fuction to sent HTTP Post requests
+// with JSON data as the payload.
+func sendJson(url string, payload []byte) {
+	buf := bytes.NewBuffer(payload)
+	resp, err := http.Post(url, "application/json", buf)
+	if err != nil {
+		return
+	}
+	resp.Body.Close()
+}