add phonetic weight command (#215)

Fixes #170

Co-authored-by: 0x5c <dev@0x5c.io>

CHANGELOG.md

@@ -6,6 +6,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 
 ## [Unreleased]
 ### Added
+- `?phoneticweight` command, which calculates a message's length in syllables.
 - `?standards` command to display [xkcd 927](https://xkcd.com/927/).
 ### Changed
 - Python>=3.7 now required.

exts/ham.py

@@ -92,6 +92,26 @@ class HamCog(commands.Cog):
         embed.colour = cmn.colours.good
         await ctx.send(embed=embed)
 
+    @commands.command(name="phoneticweight", aliases=["pw"], category=cmn.cat.ref)
+    async def _weight(self, ctx: commands.Context, *, msg: str):
+        """Calculates the phonetic weight of a callsign or message."""
+        embed = cmn.embed_factory(ctx)
+        msg = msg.upper()
+        weight = 0
+        for char in msg:
+            try:
+                weight += phonetics.pweights[char]
+            except KeyError:
+                embed.title = "Error in calculation of phonetic weight"
+                embed.description = f"Unknown character `{char}` in message"
+                embed.colour = cmn.colours.bad
+                await ctx.send(embed=embed)
+                return
+        embed.title = f"Phonetic Weight of {msg}"
+        embed.description = f"The phonetic weight is **{weight}**"
+        embed.colour = cmn.colours.good
+        await ctx.send(embed=embed)
+
 
 def setup(bot: commands.Bot):
     bot.add_cog(HamCog(bot))

resources/phonetics.py

@@ -36,3 +36,43 @@ phonetics = {
     "y": "yankee",
     "z": "zulu"
 }
+
+pweights = {
+    "A": 2,
+    "B": 2,
+    "C": 2,
+    "D": 2,
+    "E": 2,
+    "F": 2,
+    "G": 1,
+    "H": 2,
+    "I": 3,
+    "J": 3,
+    "K": 2,
+    "L": 2,
+    "M": 1,
+    "N": 3,
+    "O": 2,
+    "P": 2,
+    "Q": 2,
+    "R": 3,
+    "S": 3,
+    "T": 2,
+    "U": 3,
+    "V": 2,
+    "W": 2,
+    "X": 2,
+    "Y": 2,
+    "Z": 2,
+    "0": 2,
+    "1": 1,
+    "2": 1,
+    "3": 1,
+    "4": 1,
+    "5": 1,
+    "6": 1,
+    "7": 2,
+    "8": 1,
+    "9": 2,
+    "/": 1,
+}