feat: new notification provider: discord bot

internal/domain/access.go

@@ -121,6 +121,11 @@ type AccessConfigForDingTalkBot struct {
 	Secret     string `json:"secret"`
 }
 
+type AccessConfigForDiscordBot struct {
+	BotToken         string `json:"botToken"`
+	DefaultChannelId string `json:"defaultChannelId,omitempty"`
+}
+
 type AccessConfigForDNSLA struct {
 	ApiId     string `json:"apiId"`
 	ApiSecret string `json:"apiSecret"`

internal/domain/provider.go

@@ -33,6 +33,7 @@ const (
 	AccessProviderTypeDeSEC               = AccessProviderType("desec")
 	AccessProviderTypeDigitalOcean        = AccessProviderType("digitalocean")
 	AccessProviderTypeDingTalkBot         = AccessProviderType("dingtalkbot")
+	AccessProviderTypeDiscordBot          = AccessProviderType("discordbot")
 	AccessProviderTypeDNSLA               = AccessProviderType("dnsla")
 	AccessProviderTypeDogeCloud           = AccessProviderType("dogecloud")
 	AccessProviderTypeDuckDNS             = AccessProviderType("duckdns")
@@ -269,6 +270,7 @@ type NotificationProviderType string
 */
 const (
 	NotificationProviderTypeDingTalkBot = NotificationProviderType(AccessProviderTypeDingTalkBot)
+	NotificationProviderTypeDiscordBot  = NotificationProviderType(AccessProviderTypeDiscordBot)
 	NotificationProviderTypeEmail       = NotificationProviderType(AccessProviderTypeEmail)
 	NotificationProviderTypeLarkBot     = NotificationProviderType(AccessProviderTypeLarkBot)
 	NotificationProviderTypeMattermost  = NotificationProviderType(AccessProviderTypeMattermost)

internal/notify/providers.go

@@ -7,6 +7,7 @@ import (
 	"github.com/usual2970/certimate/internal/domain"
 	"github.com/usual2970/certimate/internal/pkg/core/notifier"
 	pDingTalkBot "github.com/usual2970/certimate/internal/pkg/core/notifier/providers/dingtalkbot"
+	pDiscordBot "github.com/usual2970/certimate/internal/pkg/core/notifier/providers/discordbot"
 	pEmail "github.com/usual2970/certimate/internal/pkg/core/notifier/providers/email"
 	pLarkBot "github.com/usual2970/certimate/internal/pkg/core/notifier/providers/larkbot"
 	pMattermost "github.com/usual2970/certimate/internal/pkg/core/notifier/providers/mattermost"
@@ -42,6 +43,19 @@ func createNotifierProvider(options *notifierProviderOptions) (notifier.Notifier
 			})
 		}
 
+	case domain.NotificationProviderTypeDiscordBot:
+		{
+			access := domain.AccessConfigForDiscordBot{}
+			if err := maputil.Populate(options.ProviderAccessConfig, &access); err != nil {
+				return nil, fmt.Errorf("failed to populate provider access config: %w", err)
+			}
+
+			return pDiscordBot.NewNotifier(&pDiscordBot.NotifierConfig{
+				BotToken:  access.BotToken,
+				ChannelId: maputil.GetOrDefaultString(options.ProviderServiceConfig, "channelId", access.DefaultChannelId),
+			})
+		}
+
 	case domain.NotificationProviderTypeEmail:
 		{
 			access := domain.AccessConfigForEmail{}

internal/pkg/core/notifier/providers/discordbot/discordbot.go

@@ -0,0 +1,67 @@
+package discordbot
+
+import (
+	"context"
+	"fmt"
+	"log/slog"
+
+	"github.com/go-resty/resty/v2"
+
+	"github.com/usual2970/certimate/internal/pkg/core/notifier"
+)
+
+type NotifierConfig struct {
+	// Discord Bot API Token。
+	BotToken string `json:"botToken"`
+	// Discord Channel ID。
+	ChannelId string `json:"channelId"`
+}
+
+type NotifierProvider struct {
+	config     *NotifierConfig
+	logger     *slog.Logger
+	httpClient *resty.Client
+}
+
+var _ notifier.Notifier = (*NotifierProvider)(nil)
+
+func NewNotifier(config *NotifierConfig) (*NotifierProvider, error) {
+	if config == nil {
+		panic("config is nil")
+	}
+
+	client := resty.New()
+
+	return &NotifierProvider{
+		config:     config,
+		logger:     slog.Default(),
+		httpClient: client,
+	}, nil
+}
+
+func (n *NotifierProvider) WithLogger(logger *slog.Logger) notifier.Notifier {
+	if logger == nil {
+		n.logger = slog.Default()
+	} else {
+		n.logger = logger
+	}
+	return n
+}
+
+func (n *NotifierProvider) Notify(ctx context.Context, subject string, message string) (res *notifier.NotifyResult, err error) {
+	// REF: https://discord.com/developers/docs/resources/message#create-message
+	req := n.httpClient.R().
+		SetHeader("Content-Type", "application/json").
+		SetHeader("Authorization", "Bot "+n.config.BotToken).
+		SetBody(map[string]any{
+			"content": subject + "\n" + message,
+		})
+	resp, err := req.Post(fmt.Sprintf("https://discord.com/api/v9/channels/%s/messages", n.config.ChannelId))
+	if err != nil {
+		return nil, fmt.Errorf("discord api error: failed to send request: %w", err)
+	} else if resp.IsError() {
+		return nil, fmt.Errorf("discord api error: unexpected status code: %d, resp: %s", resp.StatusCode(), resp.String())
+	}
+
+	return &notifier.NotifyResult{}, nil
+}

internal/pkg/core/notifier/providers/discordbot/discordbot_test.go

@@ -0,0 +1,64 @@
+package discordbot_test
+
+import (
+	"context"
+	"flag"
+	"fmt"
+	"strings"
+	"testing"
+
+	provider "github.com/usual2970/certimate/internal/pkg/core/notifier/providers/discordbot"
+)
+
+const (
+	mockSubject = "test_subject"
+	mockMessage = "test_message"
+)
+
+var (
+	fApiToken  string
+	fChannelId string
+)
+
+func init() {
+	argsPrefix := "CERTIMATE_NOTIFIER_DISCORDBOT_"
+
+	flag.StringVar(&fApiToken, argsPrefix+"APITOKEN", "", "")
+	flag.StringVar(&fChannelId, argsPrefix+"CHANNELID", 0, "")
+}
+
+/*
+Shell command to run this test:
+
+	go test -v ./discordbot_test.go -args \
+	--CERTIMATE_NOTIFIER_DISCORDBOT_APITOKEN="your-bot-token" \
+	--CERTIMATE_NOTIFIER_DISCORDBOT_CHANNELID="your-channel-id"
+*/
+func TestNotify(t *testing.T) {
+	flag.Parse()
+
+	t.Run("Notify", func(t *testing.T) {
+		t.Log(strings.Join([]string{
+			"args:",
+			fmt.Sprintf("APITOKEN: %v", fApiToken),
+			fmt.Sprintf("CHANNELID: %v", fChannelId),
+		}, "\n"))
+
+		notifier, err := provider.NewNotifier(&provider.NotifierConfig{
+			BotToken:  fApiToken,
+			ChannelId: fChannelId,
+		})
+		if err != nil {
+			t.Errorf("err: %+v", err)
+			return
+		}
+
+		res, err := notifier.Notify(context.Background(), mockSubject, mockMessage)
+		if err != nil {
+			t.Errorf("err: %+v", err)
+			return
+		}
+
+		t.Logf("ok: %v", res)
+	})
+}

internal/pkg/core/notifier/providers/telegrambot/telegrambot_test.go

@@ -17,14 +17,14 @@ const (
 
 var (
 	fApiToken string
-	fChartId  int64
+	fChatId   int64
 )
 
 func init() {
 	argsPrefix := "CERTIMATE_NOTIFIER_TELEGRAMBOT_"
 
 	flag.StringVar(&fApiToken, argsPrefix+"APITOKEN", "", "")
-	flag.Int64Var(&fChartId, argsPrefix+"CHATID", 0, "")
+	flag.Int64Var(&fChatId, argsPrefix+"CHATID", 0, "")
 }
 
 /*
@@ -41,12 +41,12 @@ func TestNotify(t *testing.T) {
 		t.Log(strings.Join([]string{
 			"args:",
 			fmt.Sprintf("APITOKEN: %v", fApiToken),
-			fmt.Sprintf("CHATID: %v", fChartId),
+			fmt.Sprintf("CHATID: %v", fChatId),
 		}, "\n"))
 
 		notifier, err := provider.NewNotifier(&provider.NotifierConfig{
 			BotToken: fApiToken,
-			ChatId:   fChartId,
+			ChatId:   fChatId,
 		})
 		if err != nil {
 			t.Errorf("err: %+v", err)