Add fpi command to search in pi with regex

modules/pi.py

@@ -1,4 +1,6 @@
 import os
+import re
+
 import traductions as tr
 
 
@@ -15,7 +17,7 @@ class MainClass:
             try:
                 start = int(args[0])
             except ValueError:
-                await msg.channel.send(tr.tr[self.guild.config["lang"]]["Errors"]["TooBigNumberPiError"])
+                await msg.channel.send(tr.tr[self.guild.config["lang"]]["errors"]["TooBigNumberPiError"])
         with open(self.pi_file) as pi_file:
             pi_file.read(start)
             txt = pi_file.read(2000)
@@ -23,11 +25,42 @@ class MainClass:
             await msg.channel.send(txt)
 
     async def pi_search(self, msg, command, args):
-        pass
+        if len(args) == 0:
+            await msg.channel.send(tr.tr[self.guild.config["lang"]]["errors"]["NotEnoughParamError"])
+            return
+        try:
+            to_search = re.compile(args[0])
+            if "*" in args[0] or "+" in args[0]:
+                await msg.channel.send(tr.tr[self.guild.config["lang"]]["errors"]["ForbiddenRegexError"])
+                return
+            elif len(args[0]) > 50:
+                await msg.channel.send(tr.tr[self.guild.config["lang"]]["errors"]["RegexTooLongError"])
+        except re.error:
+            await msg.channel.send(tr.tr[self.guild.config["lang"]]["errors"]["RegexError"])
+            return
+        with open(self.pi_file) as pi_file:
+            pi = pi_file.readline()
+            results = to_search.finditer(pi)
+            texts = []
+            for result in results:
+                texts.append(
+                    "Une occurence de votre recherche a été trouvée à la {debut}ème place: `{before}`{find}`{after}`".format(
+                        debut=result.start(0),
+                        before=pi[result.start(0) - 10:result.start(0)],
+                        find=pi[result.start(0):result.end(0)],
+                        after=pi[result.end(0):result.end(0) + 10]
+                    ))
+        if texts:
+            for text in texts[:10]:
+                await msg.channel.send(text)
+        else:
+            await msg.channel.send("Pas de résultats")
 
     async def on_message(self, msg):
         if msg.content.startswith(self.guild.config["prefix"]):
             command, *args = msg.content.lstrip(self.guild.config["prefix"]).split(" ")
             if command == "pi":
                 await self.pi(msg, command, args)
+            elif command == "fpi":
+                await self.pi_search(msg, command, args)
         return

traductions.py

@@ -147,6 +147,9 @@ tr = {
                                "du bot.",
             "CommandNotFoundError": "La commande {command} n'existe pas.",
             "TooBigNumberPiError": "Vous devez spécifier un nombre inferieur a 10000.",
+            "RegexError": "La regex que vous avez utilisé n'est pas valide.",
+            "ForbiddenRegexError": "Vous n'avez pas le droit d'utiliser les caractères `*` et `+` dans une regex.",
+            "RegexTooLongError": "La regex ne doit pas faire plus e 50 caractères",
         },
     },
 }