[RSS] Better hex code matching

rss/color.py

@@ -1,4 +1,5 @@
 import discord
+import re
 from scipy.spatial import KDTree
 import webcolors
 
@@ -6,25 +7,17 @@ import webcolors
 class Color:
     """Helper for color handling."""
 
-    @staticmethod
-    async def _color_converter(hex_code_or_color_word: str):
+    async def _color_converter(self, hex_code_or_color_word: str):
         """
         Used for user input on rss embed color
         Input:    discord.Color name, CSS3 color name, 0xFFFFFF, #FFFFFF, FFFFFF
         Output:   0xFFFFFF
         """
-        # #FFFFFF to 0xFFFFFF
-        hex_code = hex_code_or_color_word.replace("#", "0x")
-
-        # FFFFFF to 0xFFFFFF
-        # 0xFFFFFF checking
-        try:
-            int(hex_code, 16)
-            if hex_code[:2] != "0x":
-                if len(hex_code) == 6:
-                    hex_code = f"0x{hex_code}"
-        except ValueError:
-            pass
+        # #FFFFFF and FFFFFF to 0xFFFFFF
+        hex_match = re.match(r"#?[a-f0-9]{6}", hex_code_or_color_word.lower())
+        if hex_match:
+            hex_code = f"0x{hex_code_or_color_word.lstrip('#')}"
+            return hex_code
 
         # discord.Color checking
         if hasattr(discord.Color, hex_code_or_color_word):
@@ -40,7 +33,7 @@ class Color:
         except ValueError:
             pass
 
-        return hex_code
+        return None
 
     async def _hex_to_css3_name(self, hex_code: str):
         """

rss/rss.py

@@ -25,7 +25,7 @@ from .tag_type import INTERNAL_TAGS, VALID_IMAGES, TagType
 log = logging.getLogger("red.aikaterna.rss")
 
 
-__version__ = "1.1.2"
+__version__ = "1.1.3"
 
 
 class RSS(commands.Cog):
@@ -376,6 +376,14 @@ class RSS(commands.Cog):
 
         color = color.replace(" ", "_")
         hex_code = await Color()._color_converter(color)
+        if not hex_code:
+            await ctx.send(
+                "Not a valid color code. Use a hex code like #990000, a "
+                "Discord color name or a CSS3 color name.\n"
+                "<https://discordpy.readthedocs.io/en/latest/api.html#colour>\n"
+                "<https://www.w3.org/TR/2018/REC-css-color-3-20180619/#svg-color>"
+            )
+            return
         user_facing_hex = hex_code.replace("0x", "#")
         color_name = await Color()._hex_to_css3_name(hex_code)