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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 {
name: String,
stats: HashMap<NaiveDate, HabitType>,
goal: HabitType,
}
pub enum TrackEvent {
Increment,
Decrement,
}
impl Habit {
pub fn new(name: impl AsRef<str>, goal: HabitType) -> Self {
return Habit {
name: name.as_ref().to_owned(),
stats: HashMap::new(),
goal,
};
}
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 {
match self.goal {
HabitType::Bit(_) => self.insert_entry(date, HabitType::Bit(false)),
HabitType::Count(_) => self.insert_entry(date, HabitType::Count(0)),
}
}
}
}
impl HabitTrait for Habit {
fn get_name(&self) -> String {
return self.name.to_owned();
}
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;
}
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;
}
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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