towards batch download

apps/weather/src/utils.py

@@ -1,23 +1,33 @@
 import re
 
 
-def format_coord(latitude: float, longitude: float) -> str:
+def component_to_str(value: float, pos_letter: str, neg_letter: str) -> str:
+    """Convert a coordinate value to a string with a hemisphere indicator."""
+    hemi = pos_letter if value >= 0 else neg_letter
+    abs_val = abs(value)
+    degrees = int(abs_val)
+    fraction = int(round((abs_val - degrees) * 100))  # .25 becomes 25
+    return f"{hemi}{degrees:02d}{fraction:02d}"
+
+
+def latitude_to_str(latitude: float) -> str:
+    """Convert a latitude value to a string with a hemisphere indicator."""
+    return component_to_str(latitude, "N", "S")
+
+
+def longitude_to_str(latitude: float) -> str:
+    """Convert a longitude value to a string with a hemisphere indicator."""
+    return component_to_str(latitude, "E", "W")
+
+
+def coordinate_to_str(latitude: float, longitude: float) -> str:
     """Format latitude and longitude into a string with hemisphere indicators."""
-
-    def to_str(value: float, pos_letter: str, neg_letter: str) -> str:
-        """Convert a coordinate value to a string with hemisphere indicator."""
-        hemi = pos_letter if value >= 0 else neg_letter
-        abs_val = abs(value)
-        degrees = int(abs_val)
-        fraction = int(round((abs_val - degrees) * 100))  # .25 becomes 25
-        return f"{hemi}{degrees:02d}{fraction:02d}"
-
-    lat_str = to_str(latitude, "N", "S")
-    lon_str = to_str(longitude, "E", "W")
+    lat_str = latitude_to_str(latitude)
+    lon_str = longitude_to_str(longitude)
     return f"{lat_str}{lon_str}"
 
 
-def parse_coord(coord: str) -> tuple[float, float]:
+def parse_coordinate_str(coord: str) -> tuple[float, float]:
     """
     Parse a formatted coordinate string (e.g. 'N5225E0040' or 'S1350W12200')
     back into (latitude, longitude) float values.