From 4c5da3712ee777fdfe6c38dcd628e07bd03a1098 Mon Sep 17 00:00:00 2001
From: Filip <filip.strajnar@gmail.com>
Date: Sat, 22 Feb 2025 10:21:59 +0100
Subject: [PATCH] More work done on unit classes.

---
 cyclinglib/energy.py | 35 +++++++++++++++++++++++++++++++++++
 cyclinglib/force.py  | 19 +++++++++++++++++++
 cyclinglib/length.py |  3 +++
 cyclinglib/power.py  | 23 +++++++++++++++++++++++
 cyclinglib/time.py   | 19 +++++++++++++++++++
 5 files changed, 99 insertions(+)
 create mode 100644 cyclinglib/energy.py
 create mode 100644 cyclinglib/force.py
 create mode 100644 cyclinglib/power.py
 create mode 100644 cyclinglib/time.py

diff --git a/cyclinglib/energy.py b/cyclinglib/energy.py
new file mode 100644
index 0000000..db48a21
--- /dev/null
+++ b/cyclinglib/energy.py
@@ -0,0 +1,35 @@
+from cyclinglib.force import Force
+from cyclinglib.length import Length
+from cyclinglib.power import Power
+from cyclinglib.time import Time
+
+
+class Energy:
+
+    def __init__(self, joules: float):
+        self._joules = joules
+
+    def joules(self) -> float:
+        return self._joules
+
+    def kilojoules(self) -> float:
+        return self._joules / 1_000
+
+    def kilocalories(self) -> float:
+        return self.kilojoules() / 4.184
+
+    def kcal(self) -> float:
+        """
+        This is alias for kilocalories.
+        """
+        return self.kilocalories()
+
+
+def calculate_energy(force: Force, distance: Length) -> Energy:
+    joules = force.newtons() * distance.metre()
+    return Energy(joules)
+
+
+def calculate_energy_cycling(power: Power, duration: Time) -> Energy:
+    joules = power.watts() * duration.seconds()
+    return Energy(joules)
diff --git a/cyclinglib/force.py b/cyclinglib/force.py
new file mode 100644
index 0000000..d732fa2
--- /dev/null
+++ b/cyclinglib/force.py
@@ -0,0 +1,19 @@
+from cyclinglib.power import Power
+from cyclinglib.speed import Speed
+
+
+class Force:
+
+    def __init__(self, newtons: float):
+        self._newtons = newtons
+
+    def newtons(self) -> float:
+        return self._newtons
+
+    def kilonewtons(self) -> float:
+        return self._newtons / 1_000
+
+
+def calculate_force(power: Power, speed: Speed):
+    newtons: float = power.watts() * speed.meters_per_second()
+    return Force(newtons)
diff --git a/cyclinglib/length.py b/cyclinglib/length.py
index 4dacf89..45173af 100644
--- a/cyclinglib/length.py
+++ b/cyclinglib/length.py
@@ -3,6 +3,9 @@ class Length:
     def __init__(self, metre: float) -> None:
         self._metre = metre
 
+    def metre(self) -> float:
+        return self._metre
+
     def kilometre(self) -> float:
         return self._metre / 1_000
 
diff --git a/cyclinglib/power.py b/cyclinglib/power.py
new file mode 100644
index 0000000..b8e413f
--- /dev/null
+++ b/cyclinglib/power.py
@@ -0,0 +1,23 @@
+from cyclinglib.force import Force
+from cyclinglib.speed import Speed
+
+
+class Power:
+
+    def __init__(self, watts: float):
+        self._watts = watts
+
+    def watts(self) -> float:
+        return self._watts
+
+    def kilowatts(self) -> float:
+        return self._watts / 1_000
+
+
+def calculate_power(force: Force, speed: Speed) -> Power:
+    watts = force.newtons() * speed.meters_per_second()
+    return Power(watts)
+
+
+def calculate_power_si(newtons: float, meters_per_second: float) -> Power:
+    return calculate_power(Force(newtons), Speed(meters_per_second))
diff --git a/cyclinglib/time.py b/cyclinglib/time.py
new file mode 100644
index 0000000..a062668
--- /dev/null
+++ b/cyclinglib/time.py
@@ -0,0 +1,19 @@
+class Time:
+
+    def __init__(self, seconds: float):
+        self._seconds = seconds
+
+    def seconds(self) -> float:
+        return self._seconds
+
+    def milliseconds(self) -> float:
+        return self._seconds * 1_000
+
+    def hours(self) -> float:
+        return self._seconds / 3_600
+
+    def minutes(self) -> float:
+        return self._seconds / 60
+
+    def __str__(self) -> str:
+        return f"s: {self.seconds()} min: {self.minutes()} h: {self.hours()}"