Feat/modify discord title (#602)

* feat(alerting): allow discord alert's title to be configurable

* feat(alerting): modify documentation for discord title feature

* feat(test): add tests for discord title modify feature

---------

Co-authored-by: Bugra Kocabay <kocabay.bugra@gmail.com>
Co-authored-by: TwiN <twin@linux.com>

README.md

@@ -441,6 +441,7 @@ ignored.
 |:-------------------------------------------|:-------------------------------------------------------------------------------------------|:--------------|
 | `alerting.discord`                         | Configuration for alerts of type `discord`                                                 | `{}`          |
 | `alerting.discord.webhook-url`             | Discord Webhook URL                                                                        | Required `""` |
+| `alerting.discord.title`                   | Title of the notification                                                                  |  `":helmet_with_white_cross: Gatus"`         |
 | `alerting.discord.default-alert`           | Default alert configuration. <br />See [Setting a default alert](#setting-a-default-alert) | N/A           |
 | `alerting.discord.overrides`               | List of overrides that may be prioritized over the default configuration                   | `[]`          |
 | `alerting.discord.overrides[].group`       | Endpoint group for which the configuration will be overridden by this configuration        | `""`          |

alerting/provider/discord/discord.go

@@ -21,6 +21,9 @@ type AlertProvider struct {
 
 	// Overrides is a list of Override that may be prioritized over the default configuration
 	Overrides []Override `yaml:"overrides,omitempty"`
+
+	// Title is the title of the message that will be sent
+	Title string `yaml:"title,omitempty"`
 }
 
 // Override is a case under which the default integration is overridden
@@ -105,11 +108,15 @@ func (provider *AlertProvider) buildRequestBody(endpoint *core.Endpoint, alert *
 	if alertDescription := alert.GetDescription(); len(alertDescription) > 0 {
 		description = ":\n> " + alertDescription
 	}
+	title := ":helmet_with_white_cross: Gatus"
+	if provider.Title != "" {
+		title = provider.Title
+	}
 	body, _ := json.Marshal(Body{
 		Content: "",
 		Embeds: []Embed{
 			{
-				Title:       ":helmet_with_white_cross: Gatus",
+				Title:       title,
 				Description: message + description,
 				Color:       colorCode,
 				Fields: []Field{

alerting/provider/discord/discord_test.go

@@ -63,6 +63,7 @@ func TestAlertProvider_Send(t *testing.T) {
 	defer client.InjectHTTPClient(nil)
 	firstDescription := "description-1"
 	secondDescription := "description-2"
+	title := "provider-title"
 	scenarios := []struct {
 		Name             string
 		Provider         AlertProvider
@@ -111,6 +112,16 @@ func TestAlertProvider_Send(t *testing.T) {
 			}),
 			ExpectedError: true,
 		},
+		{
+			Name:     "triggered-with-modified-title",
+			Provider: AlertProvider{Title: title},
+			Alert:    alert.Alert{Description: &firstDescription, SuccessThreshold: 5, FailureThreshold: 3},
+			Resolved: false,
+			MockRoundTripper: test.MockRoundTripper(func(r *http.Request) *http.Response {
+				return &http.Response{StatusCode: http.StatusOK, Body: http.NoBody}
+			}),
+			ExpectedError: false,
+		},
 	}
 	for _, scenario := range scenarios {
 		t.Run(scenario.Name, func(t *testing.T) {
@@ -139,6 +150,7 @@ func TestAlertProvider_Send(t *testing.T) {
 func TestAlertProvider_buildRequestBody(t *testing.T) {
 	firstDescription := "description-1"
 	secondDescription := "description-2"
+	title := "provider-title"
 	scenarios := []struct {
 		Name         string
 		Provider     AlertProvider
@@ -160,6 +172,13 @@ func TestAlertProvider_buildRequestBody(t *testing.T) {
 			Resolved:     true,
 			ExpectedBody: "{\"content\":\"\",\"embeds\":[{\"title\":\":helmet_with_white_cross: Gatus\",\"description\":\"An alert for **endpoint-name** has been resolved after passing successfully 5 time(s) in a row:\\n\\u003e description-2\",\"color\":3066993,\"fields\":[{\"name\":\"Condition results\",\"value\":\":white_check_mark: - `[CONNECTED] == true`\\n:white_check_mark: - `[STATUS] == 200`\\n:white_check_mark: - `[BODY] != \\\"\\\"`\\n\",\"inline\":false}]}]}",
 		},
+		{
+			Name:         "triggered-with-modified-title",
+			Provider:     AlertProvider{Title: title},
+			Alert:        alert.Alert{Description: &firstDescription, SuccessThreshold: 5, FailureThreshold: 3},
+			Resolved:     false,
+			ExpectedBody: "{\"content\":\"\",\"embeds\":[{\"title\":\"provider-title\",\"description\":\"An alert for **endpoint-name** has been triggered due to having failed 3 time(s) in a row:\\n\\u003e description-1\",\"color\":15158332,\"fields\":[{\"name\":\"Condition results\",\"value\":\":x: - `[CONNECTED] == true`\\n:x: - `[STATUS] == 200`\\n:x: - `[BODY] != \\\"\\\"`\\n\",\"inline\":false}]}]}",
+		},
 	}
 	for _, scenario := range scenarios {
 		t.Run(scenario.Name, func(t *testing.T) {