gui: calculate queue time after receiving new Collection

CHANGELOG.md

@@ -17,7 +17,10 @@ Types of changes:
 
 # Festival GUI Unreleased
 ## Added
-- `QueueRepeat` mode to repeat queue but start paused ([#90](https://github.com/hinto-janai/festival/pull/90))
+- `QueueRepeat` mode that repeats the queue but starts paused ([#90](https://github.com/hinto-janai/festival/pull/90))
+
+## Fixed
+* Queue tab: total runtime being `0 seconds` on restart ([#96](https://github.com/hinto-janai/festival/pull/96))
 
 
 ---

gui/src/func/gui.rs

@@ -71,6 +71,9 @@ impl Gui {
         // state keys are not referencing invalid keys.
         self.state_restore
             .update_state(&mut self.state, &self.collection);
+
+        // Update queue time.
+        self.calculate_and_set_queue_time();
     }
 
     // Sets the [`egui::Ui`]'s `Visual` from our current `Settings`
@@ -394,4 +397,16 @@ impl Gui {
             None
         }
     }
+
+    /// Given the current [`AudioState`] queue, calculate the
+    /// total runtime and set the ephemeral state to reflect it.
+    pub fn calculate_and_set_queue_time(&mut self) {
+        self.queue_time = self
+            .audio_state
+            .queue
+            .iter()
+            .map(|k| self.collection.songs[k].runtime.inner() as u64)
+            .sum::<u64>()
+            .into();
+    }
 }

gui/src/ui/update.rs

@@ -94,13 +94,7 @@ impl eframe::App for Gui {
         if self.kernel_returned && queue_diff &&
 		/* needed to prevent panic */ !self.resetting_collection
         {
-            self.queue_time = self
-                .audio_state
-                .queue
-                .iter()
-                .map(|k| self.collection.songs[k].runtime.inner() as u64)
-                .sum::<u64>()
-                .into();
+            self.calculate_and_set_queue_time();
         }
         // Auto-save state.
         if (self.kernel_returned && !self.resetting_collection)