Add regular expression filter

meow.py

@@ -18,6 +18,7 @@ import requests
 import json
 import sys
 import os
+import re
 from optparse import OptionParser
 
 DISCORD_API_GUILD = 'https://discordapp.com/api/v6/guilds/%s'
@@ -42,7 +43,7 @@ def discord_cdn_get(url, out, force):
 	r = requests.get(url, allow_redirects=True)
 	open(out, 'wb').write(r.content)
 
-def main(token, guild, force = False, out = None, ua = None):
+def main(token, guild, force = False, out = None, include = None, exclude = None, ua = None):
 	if out is None:
 		out = guild
 	
@@ -71,16 +72,33 @@ def main(token, guild, force = False, out = None, ua = None):
 		}
 	}
 	
+	regex = None
+	if include != None:
+		is_include = True
+		regex = re.compile(include)
+	elif exclude != None:
+		is_include = False
+		regex = re.compile(exclude)
+	
 	for emoji in emojilist:
+		name = emoji['name']
+		
+		if regex != None:
+			if (regex.search(name) != None) != is_include:
+				print('Skipping %s, %s match regex' % (name, 'doesn\'t' if is_include else 'does'))
+				continue
+		
 		animated = emoji['animated']
 		id = emoji['id']
-		name = emoji['name']
 		
 		ext = 'gif' if animated else 'png'
 		
 		discord_cdn_get(DISCORD_CDN_EMOJI % (id, ext), os.path.join(out, name + '.' + ext), force)
 		packjson['files'][name] = name + '.' + ext
 	
+	if len(packjson['files']) == 0:
+		die('Server doesn\'t have emojis or they were excluded by regular expression')
+	
 	# always write pack.json for consistency
 	print('Writing pack.json...')
 	open(os.path.join(out, 'pack.json'), 'w').write(json.dumps(packjson))
@@ -99,6 +117,10 @@ if __name__ == '__main__':
 		help='result emojipack name')
 	parser.add_option('-f', '--force', action='store_true', dest='force',
 		help='ignore existing files')
+	parser.add_option('-i', '--include', action='store', dest='inc',
+		help='download emojis matching regular expression(incompatible with -x)')
+	parser.add_option('-x', '--exclude', action='store', dest='exc',
+		help='exclude emojis matching regular expression(incompatible with -i)')
 	
 	(options, args) = parser.parse_args()
 	
@@ -112,4 +134,7 @@ if __name__ == '__main__':
 		config.AUTHORIZATION_TOKEN,
 		options.guild,
 		options.force,
-		options.out, config.USER_AGENT))
+		options.out,
+		options.inc,
+		options.exc,
+		config.USER_AGENT))