Alerting: Add support for settings parse_mode and disable_notifications to Telegram reciever (#60198)

pkg/services/ngalert/notifier/channels/telegram.go

@@ -8,6 +8,7 @@ import (
 	"io"
 	"mime/multipart"
 	"os"
+	"strings"
 
 	"github.com/prometheus/alertmanager/notify"
 	"github.com/prometheus/alertmanager/template"
@@ -21,6 +22,11 @@ import (
 
 var (
 	TelegramAPIURL = "https://api.telegram.org/bot%s/%s"
+
+	DefaultParseMode = "HTML"
+	// SupportedParseMode is a map of all supported values for field `parse_mode`. https://core.telegram.org/bots/api#formatting-options.
+	// Keys are options accepted by Grafana API, values are options accepted by Telegram API
+	SupportedParseMode = map[string]string{"Markdown": "Markdown", "MarkdownV2": "MarkdownV2", DefaultParseMode: "HTML", "None": ""}
 )
 
 // Telegram supports 4096 chars max - from https://limits.tginfo.me/en.
@@ -41,6 +47,8 @@ type telegramSettings struct {
 	BotToken             string `json:"bottoken,omitempty" yaml:"bottoken,omitempty"`
 	ChatID               string `json:"chatid,omitempty" yaml:"chatid,omitempty"`
 	Message              string `json:"message,omitempty" yaml:"message,omitempty"`
+	ParseMode            string `json:"parse_mode,omitempty" yaml:"parse_mode,omitempty"`
+	DisableNotifications bool   `json:"disable_notifications,omitempty" yaml:"disable_notifications,omitempty"`
 }
 
 func buildTelegramSettings(fc FactoryConfig) (telegramSettings, error) {
@@ -59,6 +67,21 @@ func buildTelegramSettings(fc FactoryConfig) (telegramSettings, error) {
 	if settings.Message == "" {
 		settings.Message = DefaultMessageEmbed
 	}
+	// if field is missing, then we fall back to the previous default: HTML
+	if settings.ParseMode == "" {
+		settings.ParseMode = DefaultParseMode
+	}
+	found := false
+	for parseMode, value := range SupportedParseMode {
+		if strings.EqualFold(settings.ParseMode, parseMode) {
+			settings.ParseMode = value
+			found = true
+			break
+		}
+	}
+	if !found {
+		return settings, fmt.Errorf("unknown parse_mode, must be Markdown, MarkdownV2, HTML or None")
+	}
 	return settings, nil
 }
 
@@ -175,7 +198,12 @@ func (tn *TelegramNotifier) buildTelegramMessage(ctx context.Context, as []*type
 
 	m := make(map[string]string)
 	m["text"] = messageText
-	m["parse_mode"] = "html"
+	if tn.settings.ParseMode != "" {
+		m["parse_mode"] = tn.settings.ParseMode
+	}
+	if tn.settings.DisableNotifications {
+		m["disable_notification"] = "true"
+	}
 	return m, nil
 }
 

pkg/services/ngalert/notifier/channels/telegram_test.go

@@ -35,7 +35,9 @@ func TestTelegramNotifier(t *testing.T) {
 			name: "A single alert with default template",
 			settings: `{
 				"bottoken": "abcdefgh0123456789",
-				"chatid": "someid"
+				"chatid": "someid",
+				"parse_mode": "markdown",
+				"disable_notifications": true
 			}`,
 			alerts: []*types.Alert{
 				{
@@ -47,8 +49,9 @@ func TestTelegramNotifier(t *testing.T) {
 				},
 			},
 			expMsg: map[string]string{
-				"parse_mode": "html",
+				"parse_mode":           "Markdown",
 				"text":                 "**Firing**\n\nValue: [no value]\nLabels:\n - alertname = alert1\n - lbl1 = val1\nAnnotations:\n - ann1 = annv1\nSource: a URL\nSilence: http://localhost/alerting/silence/new?alertmanager=grafana&matcher=alertname%3Dalert1&matcher=lbl1%3Dval1\nDashboard: http://localhost/d/abcd\nPanel: http://localhost/d/abcd?viewPanel=efgh\n",
+				"disable_notification": "true",
 			},
 			expMsgError: nil,
 		}, {
@@ -73,7 +76,7 @@ func TestTelegramNotifier(t *testing.T) {
 				},
 			},
 			expMsg: map[string]string{
-				"parse_mode": "html",
+				"parse_mode": "HTML",
 				"text":       "__Custom Firing__\n2 Firing\n\nValue: [no value]\nLabels:\n - alertname = alert1\n - lbl1 = val1\nAnnotations:\n - ann1 = annv1\nSource: a URL\nSilence: http://localhost/alerting/silence/new?alertmanager=grafana&matcher=alertname%3Dalert1&matcher=lbl1%3Dval1\n\nValue: [no value]\nLabels:\n - alertname = alert1\n - lbl1 = val2\nAnnotations:\n - ann1 = annv2\nSilence: http://localhost/alerting/silence/new?alertmanager=grafana&matcher=alertname%3Dalert1&matcher=lbl1%3Dval2\n",
 			},
 			expMsgError: nil,
@@ -92,7 +95,7 @@ func TestTelegramNotifier(t *testing.T) {
 				},
 			},
 			expMsg: map[string]string{
-				"parse_mode": "html",
+				"parse_mode": "HTML",
 				"text":       strings.Repeat("1", 4096-1) + "…",
 			},
 			expMsgError: nil,
@@ -100,6 +103,14 @@ func TestTelegramNotifier(t *testing.T) {
 			name:         "Error in initing",
 			settings:     `{}`,
 			expInitError: `could not find Bot Token in settings`,
+		}, {
+			name: "Invalid parse mode",
+			settings: `{ 
+				"bottoken": "abcdefgh0123456789",
+				"chatid": "someid",
+				"parse_mode": "test"
+			}`,
+			expInitError: "unknown parse_mode, must be Markdown, MarkdownV2, HTML or None",
 		},
 	}
 

pkg/services/ngalert/notifier/channels_config/available_channels.go

@@ -682,6 +682,36 @@ func GetAvailableNotifiers() []*NotifierPlugin {
 					Placeholder:  channels.DefaultMessageEmbed,
 					PropertyName: "message",
 				},
+				{
+					Label:   "Parse Mode",
+					Element: ElementTypeSelect,
+					SelectOptions: []SelectOption{
+						{
+							Value: "None",
+							Label: "None",
+						},
+						{
+							Value: "HTML",
+							Label: "HTML",
+						},
+						{
+							Value: "Markdown",
+							Label: "Markdown",
+						},
+						{
+							Value: "MarkdownV2",
+							Label: "Markdown V2",
+						},
+					},
+					Description:  `Mode for parsing entities in the message text. Default is 'HTML'`,
+					PropertyName: "parse_mode",
+				},
+				{
+					Label:        "Disable Notification",
+					Description:  "Sends the message silently. Users will receive a notification with no sound.",
+					Element:      ElementTypeCheckbox,
+					PropertyName: "disable_notification",
+				},
 			},
 		},
 		{

pkg/tests/api/alerting/api_notification_channel_test.go

@@ -2532,7 +2532,7 @@ var expNonEmailNotifications = map[string][]string{
 		"--abcd\r\nContent-Disposition: form-data; name=\"user\"\r\n\r\nmysecretkey\r\n--abcd\r\nContent-Disposition: form-data; name=\"token\"\r\n\r\nmysecrettoken\r\n--abcd\r\nContent-Disposition: form-data; name=\"priority\"\r\n\r\n0\r\n--abcd\r\nContent-Disposition: form-data; name=\"sound\"\r\n\r\n\r\n--abcd\r\nContent-Disposition: form-data; name=\"title\"\r\n\r\n[FIRING:1] PushoverAlert (default)\r\n--abcd\r\nContent-Disposition: form-data; name=\"url\"\r\n\r\nhttp://localhost:3000/alerting/list\r\n--abcd\r\nContent-Disposition: form-data; name=\"url_title\"\r\n\r\nShow alert rule\r\n--abcd\r\nContent-Disposition: form-data; name=\"message\"\r\n\r\n**Firing**\n\nValue: A=1\nLabels:\n - alertname = PushoverAlert\n - grafana_folder = default\nAnnotations:\nSource: http://localhost:3000/alerting/grafana/UID_PushoverAlert/view\nSilence: http://localhost:3000/alerting/silence/new?alertmanager=grafana&matcher=alertname%3DPushoverAlert&matcher=grafana_folder%3Ddefault\r\n--abcd\r\nContent-Disposition: form-data; name=\"html\"\r\n\r\n1\r\n--abcd--\r\n",
 	},
 	"telegram_recv/bot6sh027hs034h": {
-		"--abcd\r\nContent-Disposition: form-data; name=\"chat_id\"\r\n\r\ntelegram_chat_id\r\n--abcd\r\nContent-Disposition: form-data; name=\"parse_mode\"\r\n\r\nhtml\r\n--abcd\r\nContent-Disposition: form-data; name=\"text\"\r\n\r\n**Firing**\n\nValue: A=1\nLabels:\n - alertname = TelegramAlert\n - grafana_folder = default\nAnnotations:\nSource: http://localhost:3000/alerting/grafana/UID_TelegramAlert/view\nSilence: http://localhost:3000/alerting/silence/new?alertmanager=grafana&matcher=alertname%3DTelegramAlert&matcher=grafana_folder%3Ddefault\n\r\n--abcd--\r\n",
+		"--abcd\r\nContent-Disposition: form-data; name=\"chat_id\"\r\n\r\ntelegram_chat_id\r\n--abcd\r\nContent-Disposition: form-data; name=\"parse_mode\"\r\n\r\nHTML\r\n--abcd\r\nContent-Disposition: form-data; name=\"text\"\r\n\r\n**Firing**\n\nValue: A=1\nLabels:\n - alertname = TelegramAlert\n - grafana_folder = default\nAnnotations:\nSource: http://localhost:3000/alerting/grafana/UID_TelegramAlert/view\nSilence: http://localhost:3000/alerting/silence/new?alertmanager=grafana&matcher=alertname%3DTelegramAlert&matcher=grafana_folder%3Ddefault\n\r\n--abcd--\r\n",
 	},
 	"googlechat_recv/googlechat_test": {
 		`{