import os

def rewrite_file(filepath):
    with open(filepath, 'r') as f:
        base = filepath[:-4]
        newfilepath = base + ".md"
        with open(newfilepath, 'w') as w:
            for i, line in enumerate(f):
                if ( (i == 0 and line == "Content-Type: text/x-zim-wiki\n")
                  or (i == 1 and line == "Wiki-Format: zim 0.26\n")
                  or (i == 2 and line == "Creation-Date: Not found\n")
                  or (i == 3 and line == "Modification-Date: Not found\n")
                  or (i == 4 and line == "\n")
                ):
                    continue
                if (i == 5):
                    title_pieces = line.split("======")
                    if len(title_pieces) == 3:
                        title = title_pieces[1].strip()
                        w.write("---\n")
                        w.write("title: " + title + "\n")
                        w.write("---\n")
                        continue

                w.write(line)



# for filepath in os.listdir():
#    if file.endswith(".txt"):
#        rewrite_file(filepath)