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slack.go
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slack.go
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package notify
import (
"encoding/json"
"fmt"
"net/url"
)
const (
slackEndpoint = "https://%s.slack.com/services/hooks/incoming-webhook?token=%s"
slackStartedMessage = "*Building* %s <%s|%s>, by %s:\n> %s"
slackSuccessMessage = "*Success* %s <%s|%s>, by %s:\n> %s"
slackFailureMessage = "*Failed* %s <%s|%s>, by %s:\n> %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 getBuildUrl(context *Context) string {
branchQuery := url.Values{}
if context.Commit.Branch != "" {
branchQuery.Set("branch", context.Commit.Branch)
}
return fmt.Sprintf("%s/%s/commit/%s?%s", context.Host, context.Repo.Slug, context.Commit.Hash, branchQuery.Encode())
}
func getMessage(context *Context, message string) string {
url := getBuildUrl(context)
return fmt.Sprintf(
message,
context.Repo.Name,
url,
context.Commit.HashShort(),
context.Commit.Author,
context.Commit.Message)
}
func (s *Slack) sendStarted(context *Context) error {
return s.send(getMessage(context, slackStartedMessage), "warning")
}
func (s *Slack) sendSuccess(context *Context) error {
return s.send(getMessage(context, slackSuccessMessage), "good")
}
func (s *Slack) sendFailure(context *Context) error {
return s.send(getMessage(context, slackFailureMessage), "danger")
}
// helper function to send HTTP requests
func (s *Slack) send(msg string, color string) error {
type Attachment struct {
Fallback string `json:"fallback"`
Text string `json:"text"`
Color string `json:"color"`
MrkdwnIn []string `json:"mrkdwn_in"`
}
attachments := []Attachment{
Attachment{
msg,
msg,
color,
[]string{"fallback", "text"},
},
}
// data will get posted in this format
data := struct {
Channel string `json:"channel"`
Username string `json:"username"`
Attachments []Attachment `json:"attachments"`
}{s.Channel, s.Username, attachments}
// 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
}