Implement post-match screen and match finishing. (#76)

Reviewed-on: #76
Co-authored-by: Álex Román Núñez <eirexe@eirteam.moe>

src/match_runtime.rs

@@ -49,6 +49,45 @@ impl MatchState {
                 .collect(),
         }
     }
+
+    pub fn is_match_finished(&self, config: &MatchConfig) -> bool {
+        let time_limit = match config.rules {
+            MatchRules::Stock {
+                starting_stocks: _,
+                time_limit_frames,
+            } => time_limit_frames,
+            MatchRules::Timed { time_limit_frames } => Some(time_limit_frames),
+        };
+
+        if let Some(time_limit) = time_limit {
+            if self.elapsed_frames >= time_limit {
+                return true;
+            }
+        }
+
+        if let MatchRules::Stock {
+            starting_stocks: _,
+            time_limit_frames: _,
+        } = config.rules
+        {
+            let alive_fighter_count = self
+                .players
+                .iter()
+                .filter(|fighter| {
+                    fighter
+                        .stocks_remaining
+                        .map(|stocks| stocks)
+                        .unwrap_or_default()
+                        > 0
+                })
+                .count();
+            if alive_fighter_count <= 1 {
+                return true;
+            }
+        }
+
+        false
+    }
 }
 
 pub struct MatchRuntimePlugin;
@@ -63,7 +102,8 @@ impl Plugin for MatchRuntimePlugin {
             .add_systems(OnExit(AppState::InMatch), reset_pause)
             .add_systems(
                 PreUpdate,
-                toggle_pause
+                (toggle_pause, check_match_finished)
+                    .chain()
                     .after(InputSystems)
                     .before(RunGgrsSystems)
                     .run_if(in_state(AppState::InMatch)),
@@ -98,14 +138,21 @@ fn toggle_pause(
     virtual_time.toggle();
 }
 
-fn reset_pause(
-    mut pause: ResMut<PauseState>,
-    mut virtual_time: ResMut<Time<Virtual>>,
-) {
+fn reset_pause(mut pause: ResMut<PauseState>, mut virtual_time: ResMut<Time<Virtual>>) {
     pause.paused = false;
     virtual_time.unpause();
 }
 
+pub fn check_match_finished(
+    match_state: Res<MatchState>,
+    match_config: Res<MatchConfig>,
+    mut next_state: ResMut<NextState<AppState>>,
+) {
+    if match_state.is_match_finished(&match_config) {
+        next_state.set(AppState::MatchResults);
+    }
+}
+
 #[cfg(test)]
 mod tests {
     use super::*;