some analytics on how long people spend parking. need a histogram still

game/src/common/trip_explorer.rs

@@ -24,17 +24,8 @@ impl TripExplorer {
         // TODO Hack because ColorLegend only takes &str
         let mut rows = Vec::new();
         for (idx, p) in phases.iter().enumerate() {
-            let label = if let Some(t2) = p.end_time {
-                format!("{} .. {} ({})", p.start_time, t2, t2 - p.start_time)
-            } else {
-                format!(
-                    "{} .. ongoing ({} so far)",
-                    p.start_time,
-                    ui.primary.sim.time() - p.start_time
-                )
-            };
             rows.push((
-                format!("{}: {}", label, p.description),
+                p.describe(ui.primary.sim.time()),
                 rotating_color_map(idx + 1),
             ));
         }

game/src/debug/objects.rs

@@ -93,8 +93,8 @@ fn dump_debug(id: ID, map: &Map, sim: &Sim, draw_map: &DrawMap) {
             sim.debug_car(id);
             if let Some(t) = sim.agent_to_trip(AgentID::Car(id)) {
                 println!("Trip log for {}", t);
-                for ev in sim.get_analytics().get_trip_log(t) {
-                    println!("- {}", ev);
+                for p in sim.get_analytics().get_trip_phases(t, map) {
+                    println!("- {}", p.describe(sim.time()));
                 }
             }
         }
@@ -102,8 +102,8 @@ fn dump_debug(id: ID, map: &Map, sim: &Sim, draw_map: &DrawMap) {
             sim.debug_ped(id);
             if let Some(t) = sim.agent_to_trip(AgentID::Pedestrian(id)) {
                 println!("Trip log for {}", t);
-                for ev in sim.get_analytics().get_trip_log(t) {
-                    println!("- {}", ev);
+                for p in sim.get_analytics().get_trip_phases(t, map) {
+                    println!("- {}", p.describe(sim.time()));
                 }
             }
         }

game/src/sandbox/score.rs

@@ -1,5 +1,5 @@
 use crate::common::TripExplorer;
-use crate::game::{State, Transition, WizardState};
+use crate::game::{msg, State, Transition, WizardState};
 use crate::sandbox::gameplay::{cmp_count_fewer, cmp_count_more, cmp_duration_shorter};
 use crate::ui::UI;
 use abstutil::prettyprint_usize;
@@ -23,6 +23,7 @@ impl Scoreboard {
             vec![
                 (hotkey(Key::Escape), "quit"),
                 (hotkey(Key::B), "browse trips"),
+                (hotkey(Key::P), "examine parking overhead"),
             ],
             ctx,
         );
@@ -89,7 +90,7 @@ impl Scoreboard {
 }
 
 impl State for Scoreboard {
-    fn event(&mut self, ctx: &mut EventCtx, _: &mut UI) -> Transition {
+    fn event(&mut self, ctx: &mut EventCtx, ui: &mut UI) -> Transition {
         self.menu.event(ctx);
         if self.menu.action("quit") {
             return Transition::Pop;
@@ -97,6 +98,12 @@ impl State for Scoreboard {
         if self.menu.action("browse trips") {
             return Transition::Push(WizardState::new(Box::new(browse_trips)));
         }
+        if self.menu.action("examine parking overhead") {
+            return Transition::Push(msg(
+                "Parking overhead",
+                ui.primary.sim.get_analytics().analyze_parking_phases(),
+            ));
+        }
         Transition::Keep
     }
 

sim/src/analytics.rs

@@ -283,23 +283,6 @@ impl Analytics {
         per_mode
     }
 
-    pub fn get_trip_log(&self, trip: TripID) -> Vec<String> {
-        self.trip_log
-            .iter()
-            .filter_map(|(t, id, maybe_req, md)| {
-                if *id == trip {
-                    if let Some(req) = maybe_req {
-                        Some(format!("At {}: {} via {}", t, md, req))
-                    } else {
-                        Some(format!("At {}: {}", t, md))
-                    }
-                } else {
-                    None
-                }
-            })
-            .collect()
-    }
-
     pub fn get_trip_phases(&self, trip: TripID, map: &Map) -> Vec<TripPhase> {
         let mut phases: Vec<TripPhase> = Vec::new();
         for (t, id, maybe_req, md) in &self.trip_log {
@@ -324,6 +307,61 @@ impl Analytics {
         }
         phases
     }
+
+    fn get_all_trip_phases(&self) -> BTreeMap<TripID, Vec<TripPhase>> {
+        let mut trips = BTreeMap::new();
+        for (t, id, _, md) in &self.trip_log {
+            let phases: &mut Vec<TripPhase> = trips.entry(*id).or_insert_with(Vec::new);
+            if let Some(ref mut last) = phases.last_mut() {
+                last.end_time = Some(*t);
+            }
+            if md == "trip finished" || md == "trip aborted for some reason" {
+                // TODO Remove aborted trips?
+                continue;
+            }
+            phases.push(TripPhase {
+                start_time: *t,
+                end_time: None,
+                // Don't compute any paths
+                path: None,
+                description: md.clone(),
+            })
+        }
+        trips
+    }
+
+    pub fn analyze_parking_phases(&self) -> Vec<String> {
+        // Of all completed trips involving parking, what percentage of total time was spent as
+        // "overhead" -- not the main driving part of the trip?
+        // TODO This is misleading for border trips -- the driving lasts longer.
+        for (_, phases) in self.get_all_trip_phases() {
+            if phases.last().as_ref().unwrap().end_time.is_none() {
+                continue;
+            }
+            let mut driving_time = Duration::ZERO;
+            let mut overhead = Duration::ZERO;
+            for p in phases {
+                let dt = p.end_time.unwrap() - p.start_time;
+                // TODO New enum instead of strings, if there'll be more analyses like this
+                if p.description.starts_with("CarID(") {
+                    driving_time += dt;
+                } else if p.description == "parking somewhere else"
+                    || p.description == "parking on the current lane"
+                {
+                    overhead += dt;
+                } else if p.description.starts_with("PedestrianID(") {
+                    overhead += dt;
+                } else {
+                    // Waiting for a bus. Irrelevant.
+                }
+            }
+            // Only interested in trips with both
+            if driving_time == Duration::ZERO || overhead == Duration::ZERO {
+                continue;
+            }
+        }
+        vec![format!("TODO: need a generic histogram")]
+    }
 }
 
 pub struct TripPhase {
@@ -333,3 +371,24 @@ pub struct TripPhase {
     pub path: Option<(Distance, Path)>,
     pub description: String,
 }
+
+impl TripPhase {
+    pub fn describe(&self, now: Time) -> String {
+        if let Some(t2) = self.end_time {
+            format!(
+                "{} .. {} ({}): {}",
+                self.start_time,
+                t2,
+                t2 - self.start_time,
+                self.description
+            )
+        } else {
+            format!(
+                "{} .. ongoing ({} so far): {}",
+                self.start_time,
+                now - self.start_time,
+                self.description
+            )
+        }
+    }
+}