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mumbledj/commands/add.go

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/*
* MumbleDJ
* By Matthieu Grieger
* commands/add.go
* Copyright (c) 2016 Matthieu Grieger (MIT License)
*/
package commands
import (
"errors"
"fmt"
"github.com/layeh/gumble/gumble"
"github.com/matthieugrieger/mumbledj/interfaces"
"github.com/spf13/viper"
)
// AddCommand is a command that adds an audio track associated with a supported
// URL to the queue.
type AddCommand struct{}
// Aliases returns the current aliases for the command.
func (c *AddCommand) Aliases() []string {
return viper.GetStringSlice("commands.add.aliases")
}
// Description returns the description for the command.
func (c *AddCommand) Description() string {
return viper.GetString("commands.add.description")
}
// IsAdminCommand returns true if the command is only for admin use, and
// returns false otherwise.
func (c *AddCommand) IsAdminCommand() bool {
return viper.GetBool("commands.add.is_admin")
}
// Execute executes the command with the given user and arguments.
// Return value descriptions:
// string: A message to be returned to the user upon successful execution.
// bool: Whether the message should be private or not. true = private,
// false = public (sent to whole channel).
// error: An error message to be returned upon unsuccessful execution.
// If no error has occurred, pass nil instead.
// Example return statement:
// return "This is a private message!", true, nil
func (c *AddCommand) Execute(user *gumble.User, args ...string) (string, bool, error) {
var (
allTracks []interfaces.Track
tracks []interfaces.Track
service interfaces.Service
err error
lastTrackAdded interfaces.Track
)
if len(args) == 0 {
return "", true, errors.New(viper.GetString("commands.add.messages.no_url_error"))
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}
for _, arg := range args {
if service, err = DJ.GetService(arg); err == nil {
tracks, err = service.GetTracks(arg, user)
if err == nil {
allTracks = append(allTracks, tracks...)
}
}
}
if len(allTracks) == 0 {
return "", true, errors.New(viper.GetString("commands.add.messages.no_valid_tracks_error"))
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}
numTooLong := 0
numAdded := 0
for _, track := range allTracks {
if err = DJ.Queue.AppendTrack(track); err != nil {
numTooLong++
} else {
numAdded++
lastTrackAdded = track
}
}
if numAdded == 0 {
return "", true, errors.New(viper.GetString("commands.add.messages.tracks_too_long_error"))
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} else if numAdded == 1 {
return fmt.Sprintf(viper.GetString("commands.add.messages.one_track_added"),
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user.Name, lastTrackAdded.GetTitle(), lastTrackAdded.GetService()), false, nil
}
retString := fmt.Sprintf(viper.GetString("commands.add.messages.many_tracks_added"), user.Name, numAdded)
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if numTooLong != 0 {
retString += fmt.Sprintf(viper.GetString("commands.add.messages.num_tracks_too_long"), numTooLong)
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}
return retString, false, nil
}