#!/usr/bin/env python
# -*- coding: utf-8 -*-

'''
Common functions to other scripts.

v2.0
https://github.com/cotes2020/jekyll-theme-chirpy
© 2018-2019 Cotes Chung
MIT License
'''

import sys
import os
import glob


def get_yaml(path):
    """
    Return the Yaml block of a post and the linenumbers of it.
    """
    end = False
    yaml = ""
    num = 0

    with open(path, 'r', encoding='utf-8') as f:
        for line in f.readlines():
            if line.strip() == '---':
                if end:
                    break
                else:
                    end = True
                    continue
            else:
                num += 1

            yaml += line

    return yaml, num


def get_makrdown_files(path):
    MD_EXTENSIONS = ["md", "markdown", "markdn", "mdown"]
    ret_files = []

    for extension in MD_EXTENSIONS:
        ret_files.extend(glob.glob(os.path.join(path, "*." + extension)))

    return ret_files


def check_py_version():
    if not sys.version_info.major == 3 and sys.version_info.minor >= 5:
        print("WARNING: This script requires Python 3.5 or higher, "
              "however you are using Python {}.{}."
              .format(sys.version_info.major, sys.version_info.minor))
        sys.exit(1)