[Core] CLI flags, env vars login, revamped setup, in. selfbot support, etc (#513)

Startup flags: can be started and configured without ever doing the interactive setup
Changed default settings format so that all unset values are None
Removed new cogs prompt
Removed `LOGIN_TYPE` from settings.json. It now defaults to token and fallbacks to email/password
Smarter initial setup: only asks for the settings that are actually missing
For the first installation all default cogs are loaded
Startup flag that allows settings to be memory-only
Initial selfbot support
Only reset login credentials (on confirmation) instead of deleting the whole file in case of login failure
Revamped main screen
Made sure that nothing blows up when you run Red on Windows without `chcp 65001`
Possibility of setting credentials in the environment variables `RED_TOKEN` / `RED_EMAIL` `RED_PASSWORD`. They will take priority over the configuration stored on disk.

cogs/owner.py

@@ -225,13 +225,16 @@ class Owner:
         result = str(result)
 
         if not ctx.message.channel.is_private:
-            censor = (self.bot.settings.email, self.bot.settings.password)
+            censor = (self.bot.settings.email,
+                      self.bot.settings.password,
+                      self.bot.settings.token)
             r = "[EXPUNGED]"
             for w in censor:
-                if w != "":
-                    result = result.replace(w, r)
-                    result = result.replace(w.lower(), r)
-                    result = result.replace(w.upper(), r)
+                if w is None or w == "":
+                    continue
+                result = result.replace(w, r)
+                result = result.replace(w.lower(), r)
+                result = result.replace(w.upper(), r)
 
         result = list(pagify(result, shorten_by=16))
 
@@ -263,11 +266,16 @@ class Owner:
     @_set.command(pass_context=True)
     async def owner(self, ctx):
         """Sets owner"""
+        if self.bot.settings.no_prompt is True:
+            await self.bot.say("Console interaction is disabled. Start Red "
+                               "without the `--no-prompt` flag to use this "
+                               "command.")
+            return
         if self.setowner_lock:
             await self.bot.say("A set owner command is already pending.")
             return
 
-        if self.bot.settings.owner != "id_here":
+        if self.bot.settings.owner is not None:
             await self.bot.say(
             "The owner is already set. Remember that setting the owner "
             "to someone else other than who hosts the bot has security "
@@ -294,6 +302,7 @@ class Owner:
             return
 
         self.bot.settings.prefixes = sorted(prefixes, reverse=True)
+        self.bot.settings.save_settings()
         log.debug("Setting global prefixes to:\n\t{}"
                   "".format(self.bot.settings.prefixes))
 
@@ -315,6 +324,7 @@ class Owner:
 
         if prefixes == ():
             self.bot.settings.set_server_prefixes(server, [])
+            self.bot.settings.save_settings()
             current_p = ", ".join(self.bot.settings.prefixes)
             await self.bot.say("Server prefixes reset. Current prefixes: "
                                "`{}`".format(current_p))
@@ -322,6 +332,7 @@ class Owner:
 
         prefixes = sorted(prefixes, reverse=True)
         self.bot.settings.set_server_prefixes(server, prefixes)
+        self.bot.settings.save_settings()
         log.debug("Setting server's {} prefixes to:\n\t{}"
                   "".format(server.id, self.bot.settings.prefixes))
 
@@ -472,9 +483,8 @@ class Owner:
         if len(token) < 50:
             await self.bot.say("Invalid token.")
         else:
-            self.bot.settings.login_type = "token"
-            self.bot.settings.email = token
-            self.bot.settings.password = ""
+            self.bot.settings.token = token
+            self.bot.settings.save_settings()
             await self.bot.say("Token set. Restart me.")
             log.debug("Token changed.")
 
@@ -645,7 +655,7 @@ class Owner:
     @commands.command(pass_context=True)
     async def contact(self, ctx, *, message : str):
         """Sends message to the owner"""
-        if self.bot.settings.owner == "id_here":
+        if self.bot.settings.owner is None:
             await self.bot.say("I have no owner set.")
             return
         owner = discord.utils.get(self.bot.get_all_members(),
@@ -684,7 +694,7 @@ class Owner:
         py_version = "[{}.{}.{}]({})".format(*os.sys.version_info[:3],
                                              python_url)
 
-        owner_set = self.bot.settings.owner != "id_here"
+        owner_set = self.bot.settings.owner is not None
         owner = self.bot.settings.owner if owner_set else None
         if owner:
             owner = discord.utils.get(self.bot.get_all_members(), id=owner)
@@ -782,6 +792,7 @@ class Owner:
 
         if choice == "yes":
             self.bot.settings.owner = author.id
+            self.bot.settings.save_settings()
             print(author.name + " has been set as owner.")
             self.setowner_lock = False
             self.owner.hidden = True