add initial float habit structure

2 files changed, 183 insertions, 0 deletions

diff --git a/src/habit/float.rs b/src/habit/float.rs
new file mode 100644
index 0000000..7e98b18
--- /dev/null
+++ b/src/habit/float.rs
@@ -0,0 +1,180 @@
+use std::cmp::{Eq, Ord, PartialEq};
+use std::collections::HashMap;
+use std::default::Default;
+use std::fmt;
+use std::ops::{Add, Sub};
+
+use chrono::NaiveDate;
+use serde::{Deserialize, Serialize};
+
+use crate::command::GoalKind;
+use crate::habit::prelude::default_auto;
+use crate::habit::traits::Habit;
+use crate::habit::{InnerData, TrackEvent};
+
+#[derive(Copy, Clone, Debug, Ord, Eq, PartialEq, PartialOrd, Serialize, Deserialize)]
+pub struct FloatData {
+    value: u32,
+    precision: u8,
+}
+
+impl FloatData {
+    pub fn add(self, v: u32) -> Self {
+        let f = FloatData {
+            value: v,
+            precision: self.precision,
+        };
+        self + f
+    }
+    pub fn sub(self, v: u32) -> Self {
+        let f = FloatData {
+            value: v,
+            precision: self.precision,
+        };
+        self - f
+    }
+    pub fn zero() -> Self {
+        FloatData {
+            value: 0,
+            precision: 0,
+        }
+    }
+}
+
+impl fmt::Display for FloatData {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        let characteristic = self.value / (10 * self.precision as u32);
+        let mantissa = self.value % (10 * self.precision as u32);
+        let s = format!("{}.{}", characteristic, mantissa);
+        write!(f, "{:^3}", s)
+    }
+}
+
+impl Add for FloatData {
+    type Output = Self;
+    fn add(self, other: Self) -> Self {
+        Self {
+            value: self.value + other.value,
+            precision: self.precision,
+        }
+    }
+}
+
+impl Sub for FloatData {
+    type Output = Self;
+
+    fn sub(self, other: Self) -> Self {
+        Self {
+            value: self.value.saturating_sub(other.value),
+            precision: self.precision,
+        }
+    }
+}
+
+#[derive(Debug, Serialize, Deserialize)]
+pub struct Float {
+    name: String,
+    stats: HashMap<NaiveDate, FloatData>,
+    goal: FloatData,
+    precision: u8,
+    #[serde(default = "default_auto")]
+    auto: bool,
+
+    #[serde(skip)]
+    inner_data: InnerData,
+}
+
+impl Float {
+    pub fn new(name: impl AsRef<str>, goal: u32, precision: u8, auto: bool) -> Self {
+        return Float {
+            name: name.as_ref().to_owned(),
+            stats: HashMap::new(),
+            goal: FloatData {
+                value: goal,
+                precision,
+            },
+            precision,
+            auto,
+            inner_data: Default::default(),
+        };
+    }
+}
+
+impl Habit for Float {
+    type HabitType = FloatData;
+
+    fn name(&self) -> String {
+        return self.name.clone();
+    }
+    fn set_name(&mut self, n: impl AsRef<str>) {
+        self.name = n.as_ref().to_owned();
+    }
+    fn kind(&self) -> GoalKind {
+        GoalKind::Float(self.goal.value, self.goal.precision)
+    }
+    fn set_goal(&mut self, g: Self::HabitType) {
+        self.goal = g;
+    }
+    fn get_by_date(&self, date: NaiveDate) -> Option<&Self::HabitType> {
+        self.stats.get(&date)
+    }
+    fn insert_entry(&mut self, date: NaiveDate, val: Self::HabitType) {
+        *self.stats.entry(date).or_insert(val) = val;
+    }
+    fn reached_goal(&self, date: NaiveDate) -> bool {
+        if let Some(val) = self.stats.get(&date) {
+            if val >= &self.goal {
+                return true;
+            }
+        }
+        return false;
+    }
+    fn remaining(&self, date: NaiveDate) -> u32 {
+        if self.reached_goal(date) {
+            return 0;
+        } else {
+            if let Some(&val) = self.stats.get(&date) {
+                return (self.goal - val).value;
+            } else {
+                return self.goal.value;
+            }
+        }
+    }
+    fn goal(&self) -> u32 {
+        return self.goal.value;
+    }
+    fn modify(&mut self, date: NaiveDate, event: TrackEvent) {
+        if let Some(val) = self.stats.get_mut(&date) {
+            match event {
+                TrackEvent::Increment => *val = val.add(1),
+                TrackEvent::Decrement => {
+                    if *val > FloatData::zero() {
+                        *val = val.sub(1);
+                    } else {
+                        self.stats.remove(&date);
+                    };
+                }
+            }
+        } else {
+            match event {
+                TrackEvent::Increment => self.insert_entry(
+                    date,
+                    FloatData {
+                        value: 1,
+                        precision: self.precision,
+                    },
+                ),
+                _ => {}
+            };
+        }
+    }
+    fn inner_data_ref(&self) -> &InnerData {
+        &self.inner_data
+    }
+    fn inner_data_mut_ref(&mut self) -> &mut InnerData {
+        &mut self.inner_data
+    }
+    fn is_auto(&self) -> bool {
+        self.auto
+    }
+}
diff --git a/src/habit/mod.rs b/src/habit/mod.rs
index d51abe5..5359bca 100644
--- a/src/habit/mod.rs
+++ b/src/habit/mod.rs
@@ -9,6 +9,9 @@ pub use count::Count;
 mod bit;
 pub use bit::Bit;
 
+mod float;
+pub use float::Float;
+
 mod prelude;
 pub use prelude::{TrackEvent, ViewMode};