implemented parsing of primitive values

src/phenopacket_mapper/utils/parsing/parse_primitive_data_value.py

@@ -2,7 +2,34 @@
 
 
 def parse_primitive_data_value(
-        value_str: str,
-        compliance: Literal['soft', 'hard'] = 'soft'
+        value_str: str
 ) -> Union[str, bool, int, float]:
-    raise NotImplementedError
+    """Parses an int, float, bool, or string from a string value.
+
+    Relies on the inbuilt Python type conversion functions to parse the value_str.
+
+    :param value_str: The string value to be parsed.
+    :return: The parsed value as an int, float, bool, or string.
+    """
+    # 1. Check if the value_str is a string
+    if not isinstance(value_str, str):
+        raise ValueError(f"Value must be a string, not {type(value_str)}")
+    # 2. Remove spaces
+    value_str = value_str.replace(" ", "")
+    # 3. Check if the value_str is an int
+    try:
+        return int(value_str)
+    except ValueError:
+        pass
+    # 4. Check if the value_str is a float
+    try:
+        return float(value_str)
+    except ValueError:
+        pass
+    # 5. Check if the value_str is a bool
+    if value_str.lower() == "true" or value_str.lower() == "t":
+        return True
+    if value_str.lower() == "false" or value_str.lower() == "f":
+        return False
+    # 6. Return the value_str as a string (definitely not an int, float, or bool, but is a string)
+    return value_str