From 13af935178655b3ea3a8b631931a4bd68934d4af Mon Sep 17 00:00:00 2001
From: Akshay <nerdypepper@tuta.io>
Date: Sat, 15 Feb 2020 18:20:36 +0530
Subject: rework habit structures

---
 src/habit.rs | 132 +++++++++++++++++++++++++++++++++++++----------------------
 1 file changed, 84 insertions(+), 48 deletions(-)

diff --git a/src/habit.rs b/src/habit.rs
index 6445545..cd1703e 100644
--- a/src/habit.rs
+++ b/src/habit.rs
@@ -3,73 +3,109 @@ use std::collections::HashMap;
 use chrono::NaiveDate;
 use serde::Serialize;
 
+#[derive(Serialize, Debug, Clone, Copy)]
+pub enum HabitType {
+    Bit(bool),
+    Count(u32),
+}
+
+impl HabitType {
+    fn inner_bit(&self) -> bool {
+        if let HabitType::Bit(v) = self {
+            *v
+        } else {
+            panic!("why");
+        }
+    }
+    fn inner_count(&self) -> u32 {
+        if let HabitType::Count(v) = self {
+            *v
+        } else {
+            panic!("why");
+        }
+    }
+}
+
+pub trait HabitTrait {
+    fn set_name(&mut self, name: impl AsRef<str>);
+    fn set_goal(&mut self, goal: HabitType);
+    fn get_name(&self) -> String;
+    fn get_by_date(&self, date: NaiveDate) -> Option<&HabitType>;
+    fn insert_entry(&mut self, date: NaiveDate, val: HabitType);
+    fn reached_goal(&self, date: NaiveDate) -> bool;
+}
+
 #[derive(Serialize, Debug)]
-pub struct Habit<T> {
+pub struct Habit {
     name: String,
-    stats: HashMap<NaiveDate, T>,
-    goal: T,
+    stats: HashMap<NaiveDate, HabitType>,
+    goal: HabitType,
+}
+
+pub enum TrackEvent {
+    Increment,
+    Decrement,
 }
 
-impl<T> Habit<T>
-where
-    T: Copy,
-{
-    pub fn new(name: &str, goal: T) -> Habit<T> {
+impl Habit {
+    pub fn new(name: impl AsRef<str>, goal: HabitType) -> Self {
         return Habit {
-            name: name.to_owned(),
+            name: name.as_ref().to_owned(),
             stats: HashMap::new(),
             goal,
         };
     }
-    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
+    pub fn modify(&mut self, date: NaiveDate, event: TrackEvent) {
+        if let Some(val) = self.stats.get_mut(&date) {
+            match val {
+                HabitType::Bit(b) => *b ^= true,
+                HabitType::Count(c) => match event {
+                    TrackEvent::Increment => *c += 1,
+                    TrackEvent::Decrement => {
+                        if *c > 0 {
+                            *c -= 1;
+                        } else {
+                            *c = 0;
+                        }
+                    }
+                },
+            }
         } else {
-            self.insert_entry(date, true);
+            match self.goal {
+                HabitType::Bit(_) => self.insert_entry(date, HabitType::Bit(false)),
+                HabitType::Count(_) => self.insert_entry(date, HabitType::Count(0)),
+            }
         }
     }
-    pub fn reached_goal(&self, date: NaiveDate) -> bool {
-        *self.get_by_date(date).unwrap_or(&false)
-    }
 }
 
-impl Habit<u32> {
-    pub fn increment(&mut self, date: NaiveDate) {
-        if let Some(v) = self.stats.get_mut(&date) {
-            *v += 1;
-        } else {
-            self.insert_entry(date, 1);
-        }
+impl HabitTrait for Habit {
+    fn get_name(&self) -> String {
+        return self.name.to_owned();
     }
-    pub fn decrement(&mut self, date: NaiveDate) {
-        if let Some(v) = self.stats.get_mut(&date) {
-            if *v > 0 {
-                *v -= 1;
-            } else {
-                *v = 0;
-            };
-        }
+    fn set_name(&mut self, n: impl AsRef<str>) {
+        self.name = n.as_ref().to_owned();
+    }
+    fn set_goal(&mut self, g: HabitType) {
+        self.goal = g;
     }
-    pub fn set(&mut self, date: NaiveDate, val: u32) {
+    fn get_by_date(&self, date: NaiveDate) -> Option<&HabitType> {
+        self.stats.get(&date)
+    }
+    fn insert_entry(&mut self, date: NaiveDate, val: HabitType) {
         *self.stats.entry(date).or_insert(val) = val;
     }
-    pub fn reached_goal(&self, date: NaiveDate) -> bool {
-        if let Some(v) = self.get_by_date(date) {
-            if *v >= self.goal {
-                return true;
-            }
+    fn reached_goal(&self, date: NaiveDate) -> bool {
+        if let Some(val) = self.stats.get(&date) {
+            match val {
+                HabitType::Bit(b) => return *b,
+                HabitType::Count(c) => {
+                    if *c >= self.goal.inner_count() {
+                        return true;
+                    }
+                }
+            };
         }
         return false;
     }
-- 
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