add recipe class

frontend/views/recipes/recipe.py

@@ -0,0 +1,61 @@
+from __future__ import annotations
+from typing import Union
+
+from enum import Enum
+
+class Recipe:
+    def __init__(self, name: str, steps: list[Step]):
+        self.name = name
+        self.steps = steps + [Step(StepType.SECTION, "Enjoy")]
+    
+    def __str__(self):
+        return self.name
+
+
+class StepType(Enum):
+    SECTION = 0
+    WEIGH = 1
+    START_TIME = 2
+    WAIT_TIME_FINISHED = 3
+    TARE = 4
+
+class Step:
+
+    def __init__(self,
+                 step_type: StepType,
+                 value: float | str = None):
+        self.step_type = step_type
+        self.value = value
+
+
+###### example recipes #########
+V60 = Recipe(
+    "V60",
+    [
+        Step(StepType.SECTION, "Grind"),
+        Step(StepType.TARE),
+        Step(StepType.WEIGH, 15),
+
+        Step(StepType.SECTION, "Brew"),
+        Step(StepType.TARE),
+        Step(StepType.START_TIME, 45),
+        Step(StepType.WEIGH, 50),
+        Step(StepType.WAIT_TIME_FINISHED),
+        Step(StepType.START_TIME, -1),
+        Step(StepType.WEIGH, 250),
+    ]
+)
+
+ESPRESSO = Recipe(
+    "Espresso",
+    [
+        Step(StepType.SECTION, "Grind"),
+        Step(StepType.TARE),
+        Step(StepType.WEIGH, 18),
+
+        Step(StepType.SECTION, "Brew"),
+        Step(StepType.TARE),
+        Step(StepType.START_TIME, -1),
+        Step(StepType.WEIGH, 40),
+    ]
+)