2 files changed, 143 insertions, 0 deletions

diff --git a/src/habit.rs b/src/habit.rs
new file mode 100644
index 0000000..4f05217
--- /dev/null
+++ b/src/habit.rs
@@ -0,0 +1,63 @@
+use std::collections::HashMap;
+
+use chrono::NaiveDate;
+
+#[derive(Debug)]
+pub struct Habit<T> {
+    name: String,
+    stats: HashMap<NaiveDate, T>,
+}
+
+impl<T> Habit<T>
+where
+    T: Copy,
+{
+    pub fn new(name: &str) -> Habit<T> {
+        return Habit {
+            name: name.to_owned(),
+            stats: HashMap::new(),
+        };
+    }
+
+    pub fn get_name(&self) -> String {
+        return self.name.to_owned();
+    }
+
+    pub fn get_by_date(&self, date: NaiveDate) -> Option<&T> {
+        self.stats.get(&date)
+    }
+
+    pub fn insert_entry(&mut self, date: NaiveDate, val: T) {
+        *self.stats.entry(date).or_insert(val) = val;
+    }
+}
+
+impl Habit<bool> {
+    pub fn toggle(&mut self, date: NaiveDate) {
+        if let Some(v) = self.stats.get_mut(&date) {
+            *v ^= true
+        } else {
+            self.insert_entry(date, true);
+        }
+    }
+}
+
+impl Habit<u32> {
+    pub fn increment(&mut self, date: NaiveDate) {
+        if let Some(v) = self.stats.get_mut(&date) {
+            *v += 1
+        }
+    }
+    pub fn decrement(&mut self, date: NaiveDate) {
+        if let Some(v) = self.stats.get_mut(&date) {
+            if *v >= 1 {
+                *v -= 1;
+            } else {
+                *v = 0;
+            };
+        }
+    }
+    pub fn set(&mut self, date: NaiveDate, val: u32) {
+        *self.stats.entry(date).or_insert(val) = val;
+    }
+}
diff --git a/src/views.rs b/src/views.rs
new file mode 100644
index 0000000..5b9ec20
--- /dev/null
+++ b/src/views.rs
@@ -0,0 +1,80 @@
+use cursive::direction::Direction;
+use cursive::event::{Event, EventResult, Key};
+use cursive::view::View;
+use cursive::{Printer, Vec2};
+
+use chrono::prelude::*;
+use chrono::{Local, NaiveDate};
+
+use crate::habit::Habit;
+
+pub struct BitView {
+    habit: Habit<bool>,
+    true_chr: char,
+    false_chr: char,
+    future_chr: char,
+
+    view_width: u32,
+    view_height: u32,
+    // color config
+}
+
+impl BitView {
+    pub fn new(habit: Habit<bool>) -> Self {
+        return BitView {
+            habit,
+            true_chr: 'x',
+            false_chr: 'o',
+            future_chr: '.',
+            view_width: 21,
+            view_height: 9,
+        };
+    }
+    pub fn get_title(&self) -> String {
+        return self.habit.get_name().to_owned();
+    }
+}
+
+impl View for BitView {
+    fn draw(&self, printer: &Printer) {
+        let now = Local::now();
+        let year = now.year();
+        let month = now.month();
+
+        for i in 1..=31 {
+            let day = NaiveDate::from_ymd_opt(year, month, i);
+            if let Some(d) = day {
+                let day_status = self.habit.get_by_date(d).unwrap_or(&false);
+                let coords = ((i % 7) * 3, i / 7 + 2);
+
+                if d <= now.naive_utc().date() {
+                    if *day_status {
+                        printer.print(coords, &format!("{:^3}", self.true_chr))
+                    } else {
+                        printer.print(coords, &format!("{:^3}", self.false_chr))
+                    }
+                } else {
+                    printer.print(coords, &format!("{:^3}", self.future_chr))
+                }
+            }
+        }
+    }
+
+    fn required_size(&mut self, _: Vec2) -> Vec2 {
+        (20, 9).into()
+    }
+
+    fn take_focus(&mut self, _: Direction) -> bool {
+        true
+    }
+
+    fn on_event(&mut self, e: Event) -> EventResult {
+        match e {
+            Event::Key(Key::Enter) => {
+                self.habit.toggle(Local::now().naive_utc().date());
+                return EventResult::Consumed(None);
+            }
+            _ => return EventResult::Ignored,
+        }
+    }
+}