Use a list of users or roles to mention for Discord notifier (#188)

docs/notif/discord.md

@@ -9,19 +9,24 @@ Allow to send notifications to your Discord channel.
     notif:
       discord:
         webhookURL: https://discordapp.com/api/webhooks/1234567890/Abcd-eFgh-iJklmNo_pqr
-        mention: here
+        mentions:
+          - "@here"
+          - "@everyone"
+          - "<@124>"
+          - "<@125>"
+          - "<@&200>"
         timeout: 10s
     ```
 
 !!! abstract "Environment variables"
     * `DIUN_NOTIF_DISCORD_WEBHOOK`
-    * `DIUN_NOTIF_DISCORD_MENTION`
+    * `DIUN_NOTIF_DISCORD_MENTIONS`
     * `DIUN_NOTIF_DISCORD_TIMEOUT`
 
 | Name               | Default       | Description   |
 |--------------------|---------------|---------------|
 | `webhookURL`[^1]   |               | Discord [incoming webhook URL](https://support.discord.com/hc/en-us/articles/228383668-Intro-to-Webhooks) |
-| `mention`          |               | Mention to directly notify a user, multiple users or roles in messages (eg. `here`) |
+| `mentions`          |              | List of users or roles to notify |
 | `timeout`          | `10s`         | Timeout specifies a time limit for the request to be made |
 
 ## Sample

internal/config/config_test.go

@@ -62,7 +62,13 @@ func TestLoadFile(t *testing.T) {
 					},
 					Discord: &model.NotifDiscord{
 						WebhookURL: "https://discordapp.com/api/webhooks/1234567890/Abcd-eFgh-iJklmNo_pqr",
-						Mention:    "here",
+						Mentions: []string{
+							"@here",
+							"@everyone",
+							"<@124>",
+							"<@125>",
+							"<@&200>",
+						},
 						Timeout: utl.NewDuration(10 * time.Second),
 					},
 					Gotify: &model.NotifGotify{

internal/config/fixtures/config.test.yml

@@ -15,7 +15,12 @@ notif:
     queue: queue
   discord:
     webhookURL: https://discordapp.com/api/webhooks/1234567890/Abcd-eFgh-iJklmNo_pqr
-    mention: here
+    mentions:
+      - "@here"
+      - "@everyone"
+      - "<@124>"
+      - "<@125>"
+      - "<@&200>"
     timeout: 10s
   gotify:
     endpoint: http://gotify.foo.com

internal/config/fixtures/config.validate.yml

@@ -15,7 +15,12 @@ notif:
     queue: queue
   discord:
     webhookURL: https://discordapp.com/api/webhooks/1234567890/Abcd-eFgh-iJklmNo_pqr
-    mention: here
+    mentions:
+      - "@here"
+      - "@everyone"
+      - "<@124>"
+      - "<@125>"
+      - "<@&200>"
     timeout: 10s
   gotify:
     endpoint: http://gotify.foo.com

internal/model/notif_discord.go

@@ -9,7 +9,7 @@ import (
 // NotifDiscord holds Discord notification configuration details
 type NotifDiscord struct {
 	WebhookURL string         `yaml:"webhookURL,omitempty" json:"webhookURL,omitempty" validate:"required"`
-	Mention    string         `yaml:"mention,omitempty" json:"mention,omitempty"`
+	Mentions   []string       `yaml:"mentions,omitempty" json:"mentions,omitempty"`
 	Timeout    *time.Duration `yaml:"timeout,omitempty" json:"timeout,omitempty" validate:"required"`
 }
 

internal/notif/discord/client.go

@@ -44,8 +44,10 @@ func (c *Client) Send(entry model.NotifEntry) error {
 		Timeout: *c.cfg.Timeout,
 	}
 
-	if len(c.cfg.Mention) > 0 {
-		content.WriteString(fmt.Sprintf("@%s ", c.cfg.Mention))
+	if len(c.cfg.Mentions) > 0 {
+		for _, mention := range c.cfg.Mentions {
+			content.WriteString(fmt.Sprintf("%s ", mention))
+		}
 	}
 	if entry.Status == model.ImageStatusNew {
 		content.WriteString(fmt.Sprintf("New image %s has been added", entry.Image.String()))