Refactor parsers

dadi_cli/parsers/argument_validation.py

@@ -0,0 +1,87 @@
+import argparse, os
+
+
+def positive_int(value: str) -> int:
+    """
+    Validates if the provided string represents a positive integer.
+
+    Parameters
+    ----------
+    value : str
+        The value to validate.
+
+    Returns
+    -------
+    int
+        The validated positive integer.
+
+    Raises
+    ------
+    argparse.ArgumentTypeError
+        If the value is not a valid integer or positive integer.
+
+    """
+    if value is not None:
+        try:
+            ivalue = int(value)
+        except ValueError:
+            raise argparse.ArgumentTypeError(f"{value} is not a valid integer")
+        if ivalue <= 0:
+            raise argparse.ArgumentTypeError(f"{value} is not a positive integer")
+    return ivalue
+
+
+def positive_number(value: str) -> float:
+    """
+    Validates if the provided string represents a positive number.
+
+    Parameters
+    ----------
+    value : str
+        The value to validate.
+
+    Returns
+    -------
+    float
+        The validated positive number.
+
+    Raises
+    ------
+    argparse.ArgumentTypeError
+        If the value is not a valid number or positive number.
+
+    """
+    if value is not None:
+        try:
+            fvalue = float(value)
+        except ValueError:
+            raise argparse.ArgumentTypeError(f"{value} is not a valid number")
+        if fvalue <= 0:
+            raise argparse.ArgumentTypeError(f"{value} is not a positive number")
+    return fvalue
+
+
+def existed_file(value: str) -> str:
+    """
+    Validates if the provided string is a path to an existing file.
+
+    Parameters
+    ----------
+    value : str
+        The path to validate.
+
+    Returns
+    -------
+    str
+        The validated file path.
+
+    Raises
+    ------
+    argparse.ArgumentTypeError
+        If the file does not exist.
+
+    """
+    if value is not None:
+        if not os.path.isfile(value):
+            raise argparse.ArgumentTypeError(f"{value} is not found")
+    return value