feat: Add discord service

cmd/discord.go

@@ -0,0 +1,89 @@
+package cmd
+
+import (
+	"context"
+	"fmt"
+	"log"
+	"strings"
+
+	"github.com/nikoksr/notify"
+	"github.com/nikoksr/notify/service/discord"
+	"github.com/urfave/cli/v2"
+)
+
+type discordPingMe struct {
+	Token   string
+	Message string
+	Channel string
+	Title   string
+}
+
+func SendToDiscord() *cli.Command {
+	var discordOpts discordPingMe
+	return &cli.Command{
+		Name:  "discord",
+		Usage: "Send message to discord",
+		Description: `Discord uses bot token to authenticate & send messages to defined channels.
+Multiple channel ids can be used separated by comma ','.
+All configuration options are also available via environment variables.`,
+		UsageText: "pingme discord --token '123' --channel '12345,67890' --message 'some message'",
+		Flags: []cli.Flag{
+			&cli.StringFlag{
+				Destination: &discordOpts.Token,
+				Name:        "token",
+				Required:    true,
+				Usage:       "Token of discord bot used for sending message.",
+				EnvVars:     []string{"DISCORD_TOKEN"},
+			},
+			&cli.StringFlag{
+				Destination: &discordOpts.Channel,
+				Name:        "channel",
+				Required:    true,
+				Usage:       "Channel ids of discord.",
+				EnvVars:     []string{"DISCORD_CHANNELS"},
+			},
+			&cli.StringFlag{
+				Destination: &discordOpts.Message,
+				Name:        "msg",
+				Usage:       "Message content.",
+				EnvVars:     []string{"DISCORD_MESSAGE"},
+			},
+			&cli.StringFlag{
+				Destination: &discordOpts.Title,
+				Name:        "title",
+				Value:       TimeValue,
+				Usage:       "Title of the message.",
+				EnvVars:     []string{"DISCORD_MSG_TITLE"},
+			},
+		},
+		Action: func(ctx *cli.Context) error {
+			notifier := notify.New()
+			discordSvc := discord.New()
+
+			if err := discordSvc.AuthenticateWithBotToken(discordOpts.Token); err != nil {
+				return fmt.Errorf("unable to authenticate %v\n", err)
+			}
+
+			chn := strings.Split(discordOpts.Channel, ",")
+			for _, v := range chn {
+				if len(v) <= 0 {
+					return fmt.Errorf(EmptyChannel)
+				}
+
+				discordSvc.AddReceivers(v)
+			}
+
+			notifier.UseServices(discordSvc)
+
+			if err := notifier.Send(
+				context.Background(),
+				discordOpts.Title,
+				discordOpts.Message,
+			); err != nil {
+				return err
+			}
+			log.Println("Successfully sent!")
+			return nil
+		},
+	}
+}