initial app helpers completed - moving to make the default apps next.

macropad_os/configuration/config_item.py

@@ -0,0 +1,50 @@
+class ValueRange(object):
+    def __init__(self, start, end):
+        self.start = start
+        self.end = end
+
+    @staticmethod
+    def from_json(json_dict: dict):
+        if not ("start" in json_dict and "end" in json_dict):
+            raise ValueError("Value Range must be provided a start and end value in the provided json dictionary")
+        return ValueRange(json_dict["start"], json_dict["end"])
+
+    def to_json(self):
+        return {
+            "start": self.start,
+            "end": self.end
+        }
+
+    def __str__(self):
+        return f"{self.to_json()}"
+
+
+class ConfigItem(object):
+    def __init__(self, name: str, value, available_values: list = None, value_range: ValueRange = None,
+                 dependency: dict = None):
+        self.name = name
+        self.value = value
+        self.available_values = available_values
+        self.value_range = value_range
+        self.dependency = dependency
+
+    @staticmethod
+    def from_json(key: str, json_dict: dict):
+        return ConfigItem(
+            key,
+            json_dict["current_value"],
+            available_values=json_dict["available_values"] if "available_values" in json_dict else None,
+            value_range=ValueRange.from_json(json_dict["value_range"]) if "value_range" in json_dict else None,
+            dependency=json_dict["dependency"] if "dependency" in json_dict else None,
+        )
+
+    def to_json(self):
+        json_dict = {"current_value": self.value}
+        if self.value_range:
+            json_dict["value_range"] = self.value_range.to_json()
+        if self.available_values:
+            json_dict["available_values"] = self.available_values
+        if self.dependency:
+            json_dict["dependency"] = self.dependency
+
+        return json_dict