Create placeholders in the historical view for days that are unpopulated.

fitnesstrax/app/src/components/day.rs

@@ -90,12 +90,14 @@ impl DaySummary {
             *self.imp().weight.borrow_mut() = Some(label);
         }
 
+        /*
         self.append(
             &gtk::Label::builder()
                 .halign(gtk::Align::Start)
                 .label("15km of biking in 60 minutes")
                 .build(),
         );
+        */
     }
 }
 

fitnesstrax/app/src/views/historical_view.rs

@@ -15,7 +15,8 @@ You should have received a copy of the GNU General Public License along with Fit
 */
 
 use crate::components::DaySummary;
-use emseries::{Record, Recordable, Timestamp};
+use chrono::{Duration, Local, NaiveDate};
+use emseries::Record;
 use ft_core::TraxRecord;
 use glib::Object;
 use gtk::{prelude::*, subclass::prelude::*};
@@ -24,7 +25,9 @@ use std::{cell::RefCell, collections::HashMap, rc::Rc};
 /// The historical view will show a window into the main database. It will show some version of
 /// daily summaries, daily details, and will provide all functions the user may need for editing
 /// records.
-pub struct HistoricalViewPrivate {}
+pub struct HistoricalViewPrivate {
+    time_window: RefCell<DayInterval>,
+}
 
 #[glib::object_subclass]
 impl ObjectSubclass for HistoricalViewPrivate {
@@ -33,7 +36,9 @@ impl ObjectSubclass for HistoricalViewPrivate {
     type ParentType = gtk::Box;
 
     fn new() -> Self {
-        Self {}
+        Self {
+            time_window: RefCell::new(DayInterval::default()),
+        }
     }
 }
 
@@ -54,10 +59,11 @@ impl HistoricalView {
         s.set_orientation(gtk::Orientation::Vertical);
         s.set_css_classes(&["historical"]);
 
-        let day_records: GroupedRecords = GroupedRecords::from(records);
+        let grouped_records =
+            GroupedRecords::new((*s.imp().time_window.borrow()).clone()).with_data(records);
 
-        let model = gio::ListStore::new::<DayRecords>();
-        model.extend_from_slice(&day_records.0);
+        let mut model = gio::ListStore::new::<DayRecords>();
+        model.extend(grouped_records.items());
 
         let factory = gtk::SignalListItemFactory::new();
         factory.connect_setup(move |_, list_item| {
@@ -149,23 +155,105 @@ impl DayRecords {
     }
 }
 
-struct GroupedRecords(Vec<DayRecords>);
+struct GroupedRecords {
+    interval: DayInterval,
+    data: HashMap<NaiveDate, DayRecords>,
+}
 
-impl From<Vec<Record<TraxRecord>>> for GroupedRecords {
-    fn from(records: Vec<Record<TraxRecord>>) -> GroupedRecords {
-        GroupedRecords(
-            records
-                .into_iter()
-                .fold(HashMap::new(), |mut acc, rec| {
-                    acc.entry(rec.date())
-                        .and_modify(|entry: &mut DayRecords| (*entry).add_record(rec.clone()))
-                        .or_insert(DayRecords::new(rec.date(), vec![rec]));
-                    acc
-                })
-                .values()
-                .cloned()
-                .collect::<Vec<DayRecords>>(),
-        )
+impl GroupedRecords {
+    fn new(interval: DayInterval) -> Self {
+        let mut s = Self {
+            interval: interval.clone(),
+            data: HashMap::new(),
+        };
+        interval.days().for_each(|date| {
+            let _ = s.data.insert(date, DayRecords::new(date, vec![]));
+        });
+        s
+    }
+
+    fn with_data(mut self, records: Vec<Record<TraxRecord>>) -> Self {
+        records.into_iter().for_each(|record| {
+            self.data
+                .entry(record.date())
+                .and_modify(|entry: &mut DayRecords| (*entry).add_record(record.clone()))
+                .or_insert(DayRecords::new(record.date(), vec![record]));
+        });
+
+        self
+    }
+
+    fn items<'a>(&'a self) -> impl Iterator<Item = DayRecords> + 'a {
+        /*
+        GroupedRecordIterator {
+            interval: self.interval.clone(),
+            data: &self.data,
+        }
+        */
+        self.interval.days().map(|date| {
+            self.data
+                .get(&date)
+                .map(|rec| rec.clone())
+                .unwrap_or(DayRecords::new(date, vec![]))
+        })
+    }
+}
+
+/*
+struct GroupedRecordIterator<'a> {
+    interval: DayInterval,
+    data: &'a HashMap<NaiveDate, DayRecords>,
+}
+
+impl <'a> Iterator for GroupedRecordIterator<'a> {
+    type Item = &'a DayRecords;
+
+    fn next(&mut self) -> Option<&'a DayRecords> {
+
+    }
+}
+*/
+
+#[derive(Clone, Debug, PartialEq, Eq)]
+struct DayInterval {
+    start: NaiveDate,
+    end: NaiveDate,
+}
+
+impl Default for DayInterval {
+    fn default() -> Self {
+        Self {
+            start: (Local::now() - Duration::days(7)).date_naive(),
+            end: Local::now().date_naive(),
+        }
+    }
+}
+
+impl DayInterval {
+    fn days(&self) -> impl Iterator<Item = NaiveDate> {
+        DayIterator {
+            current: self.start.clone(),
+            end: self.end.clone(),
+        }
+    }
+}
+
+struct DayIterator {
+    current: NaiveDate,
+    end: NaiveDate,
+}
+
+impl Iterator for DayIterator {
+    type Item = NaiveDate;
+
+    fn next(&mut self) -> Option<Self::Item> {
+        if self.current <= self.end {
+            let val = self.current.clone();
+            self.current += Duration::days(1);
+            Some(val)
+        } else {
+            None
+        }
     }
 }