Convert Ghost blog markdown files to Lektor markdown files

convert_ghost_markdown_to_lektor.py

# coding: utf-8
import os

class Converter:
    """Converts Ghost markdown files to Lektor markdown.""" 

    def __init__(self, from_dir, to_dir, author):
        self.from_dir = from_dir
        self.to_dir = to_dir
        self.author = author

    @property
    def to_convert(self):
        """All markdown files in to_dir."""

        return [GhostFile(item, self.to_dir, self.author)
                for item in os.listdir(self.from_dir) 
                if os.path.isfile(item) 
                and os.path.splitext(item)[-1] in ['.md', '.markdown']
                and not item.startswith('.')]
        
    def convert_all(self):
        """Invoke the convert method on each GhostFile object."""

        for file in self.to_convert:
            file.convert()



class GhostFile:
    """Parses Ghost markdown file and converts it."""

    def __init__(self, path, to_dir, author):
        """
        Args:
            path (str): Markdown file path.
            to_dir (str): Output path.
            author (str): The author's full name.
        """

        self.path = path
        self.to_dir = to_dir
        self.author = 'author: ' + author
        with open(self.path) as fin:
            self.contents = fin.read()
        self.body = self.contents.split('---')[-1]
        self.date_line = 'pub_date: ' + self.date
        self.title_line =  "title: " + self.title
        self.new_dir = os.path.join(to_dir, self.new_filename.split('.lr')[0])

    @property
    def date(self):
        skip = len("date: ") + 1
        date_ends = self.contents.find("date: '") + skip
        date_slice = slice(date_ends, date_ends + 10)
        return self.contents[date_slice]

    @property
    def title(self):
        for line in self.contents.split('\n'):
            print(line)
            if "title: " in line:
                title = line.split('title: ')[1]
                if title[0] in ['"', "'"]:
                    title = title[1:]
                if title[-1] in ['"', "'"]:
                    title = title[:-1]
                return title

    @property
    def new_filename(self):
        current_filename = os.path.split(self.path)[1]
        new_filename_with_ext  = current_filename.split(self.date + '-')[1]
        return new_filename_with_ext.split('.')[0] + '.lr'

    def convert(self):
        self.make_new_dir()
        with open(os.path.join(self.new_dir, 'contents.lr'), 'w') as fout:
            fout.write(self.assemble())

    def make_new_dir(self):
        if os.path.split(self.new_dir)[1] not in os.listdir(to_dir):
            os.mkdir(self.new_dir)

    def assemble(self):
        header = '\n---\n'.join([self.title_line,
                                self.date_line,
                                self.author,
                                'body:'])

        return header + self.body