fixed issue with e621 limiting searches to 6 tags and loading all of the default banned tags and added some warnings

fixed issue with e621 limiting searches to 6 tags and loading all of the default banned tags and added some warnings

docs/commands.md

@@ -1161,6 +1161,9 @@ Posts a random image from [e621](https://e621.net) using the tags you provide. T
 
 !!! warning
     This command will only work in channels marked NSFW or DMs.
+    
+!!! warning
+    [e621](https://e621.net) limits searches to 6 tags via the API. Blacklisting a lot of tags may break this command. 
 
 
 Command Structure:

roxbot/cogs/nsfw.py

@@ -55,7 +55,6 @@ class NFSW:
 			banned_tags = tag_blacklist(ctx.guild)
 		else:
 			banned_tags = ""
-		banned_tags += " -loli -shota -shotacon -lolicon -cub"  # Removes TOS breaking content from the search
 
 		post = await roxbot.utils.danbooru_clone_api_req(
 			ctx.channel,
@@ -76,6 +75,7 @@ class NFSW:
 	@commands.command()
 	async def e621(self, ctx, *, tags=""):
 		"""Posts a random image from https://e621.net using the tags you provide. Tags can be anything you would use to search the site normally like author and ratings.
+		https://e621.net limits searches to 6 tags via the API. Blacklisting a lot of tags may break this command.
 		Examples:
 			# Post a random image
 			;e621

roxbot/utils.py

@@ -30,8 +30,7 @@ import argparse
 import discord
 from discord.ext import commands
 
-from roxbot import http, config
-from roxbot import guild_settings
+from roxbot import http, config, exceptions, guild_settings
 from roxbot.enums import EmbedColours
 
 
@@ -194,9 +193,20 @@ async def danbooru_clone_api_req(channel, base_url, endpoint_url, cache=None, ta
 		banned tags to append to the search. Separated by spaces with a - in front to remove them from search results.
 	"""
 	limit = "150"
-	tags = tags + banned_tags
+	is_e621_site = bool("e621" in base_url or "e926" in base_url)
+
+	if is_e621_site:
+		banned_tags += " -cub"  # Removes TOS breaking content from the search
+		tags = tags + banned_tags
+		if len(tags.split()) > 6:
+			raise exceptions.UserError("Too many tags given for this site.")
+	else:
+		banned_tags += " -loli -shota -shotacon -lolicon -cub"  # Removes TOS breaking content from the search
+		tags = tags + banned_tags
+
 	page_number = str(random.randrange(20))
-	if "konachan" in base_url or "e621" in base_url or "e926" in base_url:
+
+	if "konachan" in base_url or is_e621_site:
 		page = "&page="
 	else:
 		page = "&pid="