Michael Manganiello
0c17ac3f8d
For the scenarios where both `Filter` and `Map` are being applied, having this util should be faster, as it avoids the creation of an extra slice during the intermediate step.
84 lines
1.8 KiB
Go
84 lines
1.8 KiB
Go
package util
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import (
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"slices"
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"github.com/dweymouth/supersonic/backend/mediaprovider"
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"github.com/dweymouth/supersonic/sharedutil"
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)
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type TrackListModel struct {
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Track *mediaprovider.Track
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Selected bool
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}
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func ToTrackListModels(trs []*mediaprovider.Track) []*TrackListModel {
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return sharedutil.MapSlice(trs, func(tr *mediaprovider.Track) *TrackListModel {
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return &TrackListModel{Track: tr, Selected: false}
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})
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}
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func SelectedTracks(tracks []*TrackListModel) []*mediaprovider.Track {
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return sharedutil.FilterMapSlice(tracks, func(tm *TrackListModel) (*mediaprovider.Track, bool) {
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return tm.Track, tm.Selected
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})
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}
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func SelectedTrackIDs(tracks []*TrackListModel) []string {
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return sharedutil.FilterMapSlice(tracks, func(tm *TrackListModel) (string, bool) {
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return tm.Track.ID, tm.Selected
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})
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}
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func SelectTrack(tracks []*TrackListModel, idx int) {
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if tracks[idx].Selected {
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return
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}
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UnselectAllTracks(tracks)
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tracks[idx].Selected = true
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}
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func SelectAllTracks(tracks []*TrackListModel) {
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for _, tm := range tracks {
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tm.Selected = true
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}
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}
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func UnselectAllTracks(tracks []*TrackListModel) {
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for _, tm := range tracks {
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tm.Selected = false
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}
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}
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func SelectTrackRange(tracks []*TrackListModel, idx int) {
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if tracks[idx].Selected {
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return
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}
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lastSelected := -1
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for i := len(tracks) - 1; i >= 0; i-- {
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if tracks[i].Selected {
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lastSelected = i
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break
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}
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}
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if lastSelected < 0 {
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tracks[idx].Selected = true
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return
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}
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from := min(idx, lastSelected)
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to := max(idx, lastSelected)
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for i := from; i <= to; i++ {
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tracks[i].Selected = true
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}
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}
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func FindTrackByID(tracks []*TrackListModel, id string) (*mediaprovider.Track, int) {
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idx := slices.IndexFunc(tracks, func(tr *TrackListModel) bool {
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return tr.Track.ID == id
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})
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if idx >= 0 {
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return tracks[idx].Track, idx
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}
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return nil, -1
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}
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