import yaml
import os
import glob
import re

class Event( object ):
    def __init__( self, path, glob ):
        self.path = path
        self.glob = glob
        self.fields = {}
        self.doc = ""

    def path_short( self ):
        # XXX needs tidy
        return "content/event/" + os.path.basename( self.path )

    def open( self ):
        for path in glob.glob( self.glob ):
            if os.path.exists( path ):
                self.path = path
                self.read()
                return False
        return True

    def write( self ):
        outfile = open( self.path, 'w', encoding = "utf-8" )
        outfile.write( ( '''\
---
%(yaml)s
---
%(md)s
''' % { 'yaml': yaml.dump( self.fields, default_flow_style = False ),
        'md': self.doc,
        } ) )

    def read( self ):
        indata = open( self.path, 'r', encoding = "utf-8" ).read()
        try:
            ( pre, yamldata, docdata ) = re.split( "^---$", indata, flags = re.MULTILINE )
        except ValueError:
            return
        self.yaml = yaml.load( yamldata )
        self.doc = docdata.strip()