[MM-742]: added a note about the label of pr/issue if subscription is specific to a label (#839)

Author: Kshitij-Katiyar

server/plugin/template.go

@@ -205,6 +205,12 @@ func init() {
 {{- if .Labels }}
 Labels: {{range $i, $el := .Labels -}}` + "{{- if $i}}, {{end}}[`{{ $el.Name }}`]({{ $.RepositoryURL }}/labels/{{ $el.Name | pathEscape }})" + `{{end -}}
 {{ end -}}
+`))
+
+	template.Must(masterTemplate.New("subscriptionLabel").Funcs(funcMap).Parse(`
+{{- if . }}
+{{- if ne . "" }} with the label ` + "`{{.}}`" + `{{- end }}
+{{- end -}}
 `))
 
 	template.Must(masterTemplate.New("assignee").Funcs(funcMap).Parse(`
@@ -219,11 +225,11 @@ Assignees: {{range $i, $el := .Assignees -}} {{- if $i}}, {{end}}{{template "use
 
 	template.Must(masterTemplate.New("newPR").Funcs(funcMap).Parse(`
 {{ if eq .Config.Style "collapsed" -}}
-{{template "repo" .Event.GetRepo}} New pull request {{template "pullRequest" .Event.GetPullRequest}} was opened by {{template "user" .Event.GetSender}}.
+{{template "repo" .Event.GetRepo}} New pull request {{template "pullRequest" .Event.GetPullRequest}} was opened by {{template "user" .Event.GetSender}}{{template "subscriptionLabel" .Label}}.
 {{- else -}}
 #### {{.Event.GetPullRequest.GetTitle}}
 ##### {{template "eventRepoPullRequest" .Event}}
-#new-pull-request by {{template "user" .Event.GetSender}}
+#new-pull-request by {{template "user" .Event.GetSender}}{{template "subscriptionLabel" .Label}}
 {{- if ne .Config.Style "skip-body" -}}
 {{- template "labels" dict "Labels" .Event.GetPullRequest.Labels "RepositoryURL" .Event.GetRepo.GetHTMLURL  }}
 {{- template "assignee" .Event.GetPullRequest }}
@@ -235,11 +241,11 @@ Assignees: {{range $i, $el := .Assignees -}} {{- if $i}}, {{end}}{{template "use
 
 	template.Must(masterTemplate.New("markedReadyToReviewPR").Funcs(funcMap).Parse(`
 {{ if eq .Config.Style "collapsed" -}}
-{{template "repo" .Event.GetRepo}} Pull request {{template "pullRequest" .Event.GetPullRequest}} was marked ready for review by {{template "user" .Event.GetSender}}.
+{{template "repo" .Event.GetRepo}} Pull request {{template "pullRequest" .Event.GetPullRequest}} was marked ready for review by {{template "user" .Event.GetSender}}{{template "subscriptionLabel" (dict "Label" .Label)}}.
 {{- else -}}
 #### {{.Event.GetPullRequest.GetTitle}}
 ##### {{template "eventRepoPullRequest" .Event}}
-#new-pull-request by {{template "user" .Event.PullRequest.User}}
+#new-pull-request by {{template "user" .Event.PullRequest.User}}{{template "subscriptionLabel" .Label}}
 {{- if ne .Config.Style "skip-body" -}}
 {{- template "labels" dict "Labels" .Event.GetPullRequest.Labels "RepositoryURL" .Event.GetRepo.GetHTMLURL  }}
 {{- template "assignee" .Event.GetPullRequest }}
@@ -272,11 +278,11 @@ Assignees: {{range $i, $el := .Assignees -}} {{- if $i}}, {{end}}{{template "use
 
 	template.Must(masterTemplate.New("newIssue").Funcs(funcMap).Parse(`
 {{ if eq .Config.Style "collapsed" -}}
-{{template "repo" .Event.GetRepo}} New issue {{template "issue" .Event.GetIssue}} opened by {{template "user" .Event.GetSender}}.
+{{template "repo" .Event.GetRepo}} New issue {{template "issue" .Event.GetIssue}} opened by {{template "user" .Event.GetSender}}{{template "subscriptionLabel" .Label}}.
 {{- else -}}
 #### {{.Event.GetIssue.GetTitle}}
 ##### {{template "eventRepoIssue" .Event}}
-#new-issue by {{template "user" .Event.GetSender}}
+#new-issue by {{template "user" .Event.GetSender}}{{template "subscriptionLabel" .Label}}
 {{- if ne .Config.Style "skip-body" -}}
 {{- template "labels" dict "Labels" .Event.GetIssue.Labels "RepositoryURL" .Event.GetRepo.GetHTMLURL  }}
 {{- template "assignee" .Event.GetIssue }}

server/plugin/webhook.go

@@ -57,6 +57,7 @@ type RenderConfig struct {
 type EventWithRenderConfig struct {
 	Event  interface{}
 	Config RenderConfig
+	Label  string
 }
 
 func verifyWebhookSignature(secret []byte, signature string, body []byte) (bool, error) {
@@ -95,15 +96,18 @@ func signBody(secret, body []byte) ([]byte, error) {
 // which also contains per-subscription configuration options.
 func GetEventWithRenderConfig(event interface{}, sub *Subscription) *EventWithRenderConfig {
 	style := ""
+	subscriptionLabel := ""
 	if sub != nil {
 		style = sub.RenderStyle()
+		subscriptionLabel = sub.Label()
 	}
 
 	return &EventWithRenderConfig{
 		Event: event,
 		Config: RenderConfig{
 			Style: style,
 		},
+		Label: subscriptionLabel,
 	}
 }