Add mermaid graph generator using kroki api

cogs/utility.py

@@ -3,6 +3,7 @@
 # https://git.joinemm.dev/miso-bot
 
 import html
+import io
 import json
 import random
 from time import time
@@ -1124,6 +1125,33 @@ async def market(self, ctx: commands.Context, *, search_term: str):
 
  await MarketPaginator(data["results"]).run(ctx)
 
+ @commands.command()
+ async def graph(self, ctx: commands.Context, *, code: str):
+ """Generate a graph from code using Mermaid language
+
+ Syntax reference: https://mermaid.js.org/intro/syntax-reference.html
+ """
+ async with self.bot.session.post(
+ "https://kroki.io/",
+ json={
+ "diagram_source": code.strip("`"),
+ "diagram_type": "mermaid",
+ "output_format": "png",
+ "diagram_options": {"theme": "dark"},
+ },
+ ) as response:
+ if not response.ok:
+ error = await response.text()
+ raise exceptions.CommandError(error.split(" at", 1)[0])
+
+ buffer = io.BytesIO(await response.read())
+ await ctx.send(
+ file=discord.File(
+ fp=buffer,
+ filename="miso_bot_mermaid_graph.png",
+ ),
+ )
+
 
 async def setup(bot):
  await bot.add_cog(Utility(bot))