kamitkami/kamitkami.py

'''
KamitKami gives a smaller css to be included with html file for faster website loading times.
Copyright (C) 2021 Sagar Acharya

This program is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License as
published by the Free Software Foundation, either version 3 of the
License.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU Affero General Public License for more details.

You should have received a copy of the GNU Affero General Public License
along with this program.  If not, see <https://www.gnu.org/licenses/>.
'''

import sys, os, re
#import soupsieve
from bs4 import BeautifulSoup

# changes working directory to script directory
os.chdir(os.getcwd())

# get arguments from terminal to list
names = sys.argv[1:]

# list which keeps some attributes as they are within css file
nofilter = ["*", "html", "body", ":root", "head"]

# checks whether number of arguments are correct
if len(names)!=2:
	print("Please input only 2 arguments, css filename and html filename")
	sys.exit()

# checks if files exist in current directory
if not (os.path.isfile(names[0]+'.css') and os.path.isfile(names[1]+'.html')):
	print("Please input correct names of css and html files. Files do not exist.")
	sys.exit()

with open(names[0]+'.css') as temp:
	css = temp.read()
with open(names[1]+'.html') as temp:
	html = temp.read()

soup = BeautifulSoup(html, 'html.parser')

def divide_elem_blocks(css_string):
	_import = ["@import" + x + ";" for x in re.findall(r'@import(.*?);', css_string)]
	for i in _import:
		css_string = css_string.replace(i, "")

	selectors = []
	blocks = []
	num_curly = 0
	start = False
	
	record = ["", ""]
	for i in css_string:
		if start:
			if (i == '{'):
				num_curly +=1
				record[1] +=i
			elif (i == '}' and num_curly == 0):
				selectors.append(record[0])
				blocks.append(record[1])
				record = ["", ""]
				start = False
			elif (i == '}' and num_curly > 0):
				num_curly -=1				
			else:
				record[1]+=i
		else:
			if (i == '{'):
				start = True
			else:
				record[0]+=i

		if (i == '{' and num_curly == 0):
			start = True

	return _import, selectors, blocks

# filters C type comments
css = re.sub('\/\*(\*(?!\/)|[^*])*\*\/', '', css)
css = css.replace("\n", "")

# selectors and blocks have same length and correspond to each other
_import, selectors, blocks = divide_elem_blocks(css)

notImplemented = 0
syntaxError = 0
other = 0
noFind = 0

with open(names[1]+"_"+names[0]+".css", 'w') as f:
	for i in _import:
		f.write(i)

	for i in range(len(selectors)):
		if i in nofilter:
			f.write(selectors[i]+'{'+blocks[i]+'}\n')
			continue

		try:
			temp = soup.select(selectors[i])
			if len(temp)>0:
				f.write(selectors[i]+'{'+blocks[i]+'}\n')
			else:
				noFind +=1
				#print("Didn't find "+selectors[i])
				pass
		except:
			f.write(selectors[i]+'{'+blocks[i]+'}\n')
			other +=1

'''
			print(selectors[i])
			print(soup.select(selectors[i]))

		except NotImplementedError:
			notImplemented +=1
			f.write(selectors[i]+'{'+blocks[i]+'}\n')
		except soupsieve.util.SelectorSyntaxError:
			syntaxError +=1
			f.write(selectors[i]+'{'+blocks[i]+'}\n')
'''

#Lines which Beautiful soup cannot detect as css
print("Error : "+str((notImplemented + syntaxError + other)*100/len(selectors))+ "%")

#Number of lines of css selectors removed as a % of all css selector lines
print("Removed : "+str(noFind*100/len(selectors))+ "% lines from css file.")

#minify