fix mention parse function

app/internal/domain/service/slack_mentioned.go

@@ -45,10 +45,11 @@ func (s *slackMentionedService) Parse(message string) *model.MentionParseResult
 			Message: message,
 		}
 	}
-	if strings.HasPrefix(tmp[1], ":") && strings.HasSuffix(tmp[1], ":") {
+	reaction := tmp[1]
+	if strings.HasPrefix(reaction, ":") && strings.HasSuffix(reaction, ":") {
 		return &model.MentionParseResult{
 			Message:  message,
-			Reaction: strings.ReplaceAll(tmp[1], ":", ""),
+			Reaction: strings.ReplaceAll(s.removeSkinTone(reaction), ":", ""),
 		}
 	}
 	// invalid argument (not emoji)
@@ -57,3 +58,10 @@ func (s *slackMentionedService) Parse(message string) *model.MentionParseResult
 		Command: CommandHelp,
 	}
 }
+
+func (s *slackMentionedService) removeSkinTone(reaction string) string {
+	for _, st := range model.ReactionSkinTones {
+		reaction = strings.ReplaceAll(reaction, st, "")
+	}
+	return reaction
+}

app/internal/domain/service/slack_mentioned_test.go

@@ -67,6 +67,14 @@ func Test_slackMentionedService_Parse(t *testing.T) {
 				Command: CommandHelp,
 			},
 		},
+		{
+			name: "OK: when a reaction with skin-tone is specified",
+			args: args{message: "@auriga :+1::skin-tone-2:"},
+			want: &model.MentionParseResult{
+				Message:  "@auriga :+1::skin-tone-2:",
+				Reaction: "+1",
+			},
+		},
 		{
 			name: "NG: reaction is formatted incorrectly.",
 			args: args{message: "@auriga :tmp"},