Add Music Player (#49)

* Adding MusicConductor

* Added selectable songs and player visibility toggle

* Refinements to the music system

* SongInfo compatability with various audio formats

* Moved UI reqs to editor description; flipped conditions to exclude music .import files

* Made selection of the first music track extension-agnostic

* Fixed visual bug with play/pause button when interacting with progress slider

1 files changed, 66 insertions, 0 deletions

diff --git a/game/src/MusicConductor/MusicUIController.gd b/game/src/MusicConductor/MusicUIController.gd
new file mode 100644
index 0000000..f2c9225
--- /dev/null
+++ b/game/src/MusicConductor/MusicUIController.gd
@@ -0,0 +1,66 @@
+extends Control
+
+@export var songSelectorButton : OptionButton
+@export var progressSlider : HSlider
+@export var prevSongButton : Button
+@export var playPauseButton : Button
+@export var nextSongButton : Button
+@export var widgetVisibilityButton : Button
+
+var isMusicPlayerVisible : bool = true
+var isUserDraggingProgressSlider : bool = false
+
+# Called when the node enters the scene tree for the first time.
+func _ready():
+	for songName in MusicConductor.getAllSongNames():
+		songSelectorButton.add_item(songName, songSelectorButton.item_count)
+	updateSongNameVisual()
+
+
+# Called every frame. 'delta' is the elapsed time since the previous frame.
+func _process(_delta):
+	if !isUserDraggingProgressSlider:
+		progressSlider.value = MusicConductor.getCurrentSongProgressPercentage()
+
+func updateSongNameVisual():
+	songSelectorButton.selected = MusicConductor.getCurrentSongIndex()
+
+func updatePlayPauseButtonVisual():
+	playPauseButton.text = "||" if MusicConductor.isPaused() else ">"
+
+func _on_play_pause_button_pressed():
+	MusicConductor.togglePlayPause()
+	updatePlayPauseButtonVisual()
+
+func _on_next_song_button_pressed():
+	MusicConductor.nextSong()
+	updateSongNameVisual()
+	updatePlayPauseButtonVisual()
+
+func _on_previous_song_button_pressed():
+	MusicConductor.prevSong()
+	updateSongNameVisual()
+	updatePlayPauseButtonVisual()
+
+func _on_option_button_item_selected(index):
+	# UIFUN-92
+	MusicConductor.startSongByIndex(index)
+
+
+func _on_progress_slider_drag_started():
+	isUserDraggingProgressSlider = true
+
+
+func _on_progress_slider_drag_ended(_value_changed):
+	MusicConductor.scrubSongByPercentage(progressSlider.value)
+	isUserDraggingProgressSlider = false
+	updatePlayPauseButtonVisual()
+
+func _on_music_ui_visibility_button_pressed():
+	isMusicPlayerVisible = !isMusicPlayerVisible
+	widgetVisibilityButton.text = "Hide Player" if isMusicPlayerVisible else "Show Player"
+	songSelectorButton.visible = isMusicPlayerVisible
+	progressSlider.visible = isMusicPlayerVisible
+	prevSongButton.visible = isMusicPlayerVisible
+	playPauseButton.visible = isMusicPlayerVisible
+	nextSongButton.visible = isMusicPlayerVisible