1 feature request compare existing songs by (#3)

* adding vscode-ish .gitignore file

* check to compare exact IDs of Tracks while add #1

---------

Co-authored-by: Nico Wunder <n.wunder@onacy.de>

.gitignore

@@ -1,2 +1,3 @@
 bin/
 .idea
+.vscode/launch.json

cmd/telegramBot.go

@@ -24,14 +24,15 @@ package cmd
 import (
 	"context"
 	"fmt"
+	"log"
+	"strings"
+
 	tgbotapi "github.com/go-telegram-bot-api/telegram-bot-api/v5"
 	"github.com/spf13/cobra"
 	"github.com/spf13/viper"
 	"github.com/zmb3/spotify/v2"
 	spotifyauth "github.com/zmb3/spotify/v2/auth"
 	"golang.org/x/oauth2"
-	"log"
-	"strings"
 )
 
 // telegramBotCmd represents the telegramBot command
@@ -104,10 +105,49 @@ It is not planned to extend this in the future.`,
 					cobra.CheckErr(err)
 
 					if results != nil {
-						track := results.Tracks.Tracks[0]
+
 						playlist, err := client.GetPlaylist(ctx, spotify.ID(viper.GetString("spotify_playlist_id")))
 						cobra.CheckErr(err)
 
+						tracks, err := client.GetPlaylistItems(ctx, playlist.ID)
+						cobra.CheckErr(err)
+
+						trackIDs := make([]spotify.ID, 0, len(tracks.Items))
+
+						for page := 1; ; page++ {
+
+							for _, track := range tracks.Items {
+								trackIDs = append(trackIDs, track.Track.Track.ID)
+							}
+
+							err = client.NextPage(ctx, tracks)
+							if err == spotify.ErrNoMorePages {
+								break
+							}
+							if err != nil {
+								cobra.CheckErr(err)
+							}
+						}
+
+						if contains(trackIDs, results.Tracks.Tracks[0].ID) {
+							track := results.Tracks.Tracks[0]
+
+							msg.Text = fmt.Sprintf("⛔ Ooops, dieser Titel ist schon in der Playlist!\n Ich habe den Titel <pre>%s</pre> von <pre>%s</pre> nicht ERNEUT zur Playlist <pre>%s</pre> hinzugefügt.",
+								track.Name,
+								track.Artists[0].Name,
+								playlist.Name,
+							)
+							msg.ParseMode = "HTML"
+							_, err = bot.Send(msg)
+							cobra.CheckErr(err)
+
+							fmt.Printf("Declined adding duplicate track: %s by %s",
+								track.Name,
+								track.Artists[0].Name)
+
+						} else {
+							track := results.Tracks.Tracks[0]
+
 							addTrackResponse, err := client.AddTracksToPlaylist(ctx,
 								playlist.ID,
 								results.Tracks.Tracks[0].ID)
@@ -126,8 +166,9 @@ It is not planned to extend this in the future.`,
 								track.Name,
 								track.Artists[0].Name,
 								addTrackResponse)
-
 						}
+					}
+
 				case "rofl":
 					msg.Text = "🤣"
 					_, err = bot.Send(msg)
@@ -156,3 +197,12 @@ func init() {
 	// is called directly, e.g.:
 	// telegramBotCmd.Flags().BoolP("toggle", "t", false, "Help message for toggle")
 }
+
+func contains(s []spotify.ID, e spotify.ID) bool {
+	for _, a := range s {
+		if a == e {
+			return true
+		}
+	}
+	return false
+}