From d62beabb62c87f5967e48844288ed86bbad55e29 Mon Sep 17 00:00:00 2001
From: Aravinth Manivannan <realaravinth@batsense.net>
Date: Mon, 16 Sep 2024 15:43:29 +0530
Subject: [PATCH] feat: convert price from major to minor and minor to major

---
 src/types/currency.rs | 41 ++++++++++++++++++++++++
 src/types/quantity.rs |  8 ++---
 src/utils/currency.rs | 72 -------------------------------------------
 src/utils/mod.rs      |  1 -
 4 files changed, 44 insertions(+), 78 deletions(-)
 delete mode 100644 src/utils/currency.rs

diff --git a/src/types/currency.rs b/src/types/currency.rs
index 12bed8b..c476512 100644
--- a/src/types/currency.rs
+++ b/src/types/currency.rs
@@ -46,6 +46,22 @@ pub struct Price {
     currency: Currency,
 }
 
+impl Price {
+    pub fn major_as_minor(&self) -> usize {
+        self.major * 100
+    }
+
+    pub fn from_minor(minor_only: usize, currency: Currency) -> Price {
+        let minor = minor_only % 100;
+        let major = (minor_only - minor) / 100;
+        Price {
+            minor,
+            major,
+            currency,
+        }
+    }
+}
+
 #[cfg(test)]
 mod tests {
     use super::*;
@@ -69,4 +85,29 @@ mod tests {
     fn currency_to_string_from_str() {
         assert!(test_helper(Currency::INR, INR));
     }
+
+    #[test]
+    fn from_major_to_minor() {
+        assert_eq!(
+            Price {
+                major: 100,
+                minor: 0,
+                currency: Currency::INR,
+            }
+            .major_as_minor(),
+            100 * 100
+        );
+    }
+
+    #[test]
+    fn from_minor() {
+        assert_eq!(
+            Price::from_minor((100 * 100) + 1, Currency::INR),
+            Price {
+                major: 100,
+                minor: 1,
+                currency: Currency::INR,
+            }
+        );
+    }
 }
diff --git a/src/types/quantity.rs b/src/types/quantity.rs
index 1d373d9..14dea3b 100644
--- a/src/types/quantity.rs
+++ b/src/types/quantity.rs
@@ -260,7 +260,7 @@ mod tests {
         );
 
         // error cases
-       assert_eq!(
+        assert_eq!(
             QuantityPart {
                 unit: QuantityUnit::Milligram,
                 number: 1
@@ -268,7 +268,7 @@ mod tests {
             .as_minor(),
             Err(QuantityError::QuantityCantBeDivided)
         );
-       assert_eq!(
+        assert_eq!(
             QuantityPart {
                 unit: QuantityUnit::DiscreteNumber,
                 number: 1
@@ -276,7 +276,7 @@ mod tests {
             .as_minor(),
             Err(QuantityError::QuantityCantBeDivided)
         );
-       assert_eq!(
+        assert_eq!(
             QuantityPart {
                 unit: QuantityUnit::Milligram,
                 number: 1
@@ -284,7 +284,5 @@ mod tests {
             .as_minor(),
             Err(QuantityError::QuantityCantBeDivided)
         );
-
-
     }
 }
diff --git a/src/utils/currency.rs b/src/utils/currency.rs
deleted file mode 100644
index 12bed8b..0000000
--- a/src/utils/currency.rs
+++ /dev/null
@@ -1,72 +0,0 @@
-// SPDX-FileCopyrightText: 2024 Aravinth Manivannan <realaravinth@batsense.net>
-//
-// SPDX-License-Identifier: AGPL-3.0-or-later
-
-use std::str::FromStr;
-
-use async_trait::async_trait;
-use cqrs_es::Aggregate;
-use derive_builder::Builder;
-use derive_getters::Getters;
-use derive_more::Display;
-use serde::{Deserialize, Serialize};
-use uuid::Uuid;
-
-#[derive(Clone, Display, Debug, Serialize, Deserialize, Eq, PartialEq, Ord, PartialOrd)]
-pub enum Currency {
-    #[display(fmt = "{}", INR)]
-    INR,
-}
-
-const INR: &str = "INR";
-
-impl FromStr for Currency {
-    type Err = String;
-    fn from_str(s: &str) -> Result<Self, Self::Err> {
-        let s = s.trim();
-        match s {
-            INR => Ok(Self::INR),
-            _ => Err("Currency unsupported".into()),
-        }
-    }
-}
-
-impl Default for Currency {
-    fn default() -> Self {
-        Self::INR
-    }
-}
-
-#[derive(
-    Clone, Default, Debug, Serialize, Deserialize, Eq, PartialEq, Ord, PartialOrd, Getters, Builder,
-)]
-pub struct Price {
-    major: usize,
-    minor: usize,
-    currency: Currency,
-}
-
-#[cfg(test)]
-mod tests {
-    use super::*;
-
-    fn test_helper<T>(t: T, str_value: &str) -> bool
-    where
-        T: ToString + FromStr + std::fmt::Debug + PartialEq,
-        <T as FromStr>::Err: std::fmt::Debug,
-    {
-        println!("Testing type: {:?} against value {str_value}", t);
-        assert_eq!(t.to_string(), str_value.to_string());
-
-        assert_eq!(T::from_str(str_value).unwrap(), t);
-
-        assert_eq!(T::from_str(t.to_string().as_str()).unwrap(), t,);
-
-        true
-    }
-
-    #[test]
-    fn currency_to_string_from_str() {
-        assert!(test_helper(Currency::INR, INR));
-    }
-}
diff --git a/src/utils/mod.rs b/src/utils/mod.rs
index 499bf66..9bcf0b0 100644
--- a/src/utils/mod.rs
+++ b/src/utils/mod.rs
@@ -2,7 +2,6 @@
 //
 // SPDX-License-Identifier: AGPL-3.0-or-later
 
-pub mod currency;
 pub mod parse_aggregate_id;
 pub mod random_string;
 pub mod string;