# -*- coding: iso-8859-1 -*-
# Copyright (C) 2004-2005 Tristan Seligmann and Jonathan Jacobs
import os
import time
import urllib
from . import rss, util, configuration
class EventHandler(object):
"""Base class for writing events to files. The currently defined events are
start(), comicDownloaded() and end()."""
def __init__(self, basepath, baseurl):
"""Initialize base path and url."""
self.basepath = basepath
self.baseurl = baseurl or self.getBaseUrl()
def getBaseUrl(self):
'''Return a file: URL that probably points to the basedir.
This is used as a halfway sane default when the base URL is not
provided; not perfect, but should work in most cases.'''
components = util.splitpath(os.path.abspath(self.basepath))
url = '/'.join([urllib.quote(component, '') for component in components])
return 'file:///' + url + '/'
def getUrlFromFilename(self, filename):
"""Construct URL from filename."""
components = util.splitpath(util.getRelativePath(self.basepath, filename))
url = '/'.join([urllib.quote(component, '') for component in components])
return self.baseurl + url
def start(self):
"""Emit a start event. Should be overridden in subclass."""
pass
def comicDownloaded(self, comic, filename):
"""Emit a comic downloaded event. Should be overridden in subclass."""
pass
def end(self):
"""Emit an end event. Should be overridden in subclass."""
pass
class RSSEventHandler(EventHandler):
"""Output in RSS format."""
def getFilename(self):
"""Return RSS filename."""
return os.path.abspath(os.path.join(self.basepath, 'dailydose.rss'))
def start(self):
"""Log start event."""
today = time.time()
yesterday = today - 86400
today = time.localtime(today)
yesterday = time.localtime(yesterday)
link = configuration.Url
self.rssfn = self.getFilename()
if os.path.exists(self.rssfn):
self.newfile = False
self.rss = rss.parseFeed(self.rssfn, yesterday)
else:
self.newfile = True
self.rss = rss.Feed('Daily Dosage', link, 'Comics for %s' % time.strftime('%Y/%m/%d', today))
def comicDownloaded(self, comic, filename):
"""Write RSS entry for downloaded comic."""
url = self.getUrlFromFilename(filename)
title = '%s - %s' % (comic, os.path.basename(filename))
description = '
View Comic' % (url, url)
args = (
title,
url,
description,
util.rfc822date(time.time())
)
if self.newfile:
self.newfile = False
self.rss.addItem(*args)
else:
self.rss.addItem(*args, append=False)
def end(self):
"""Write RSS data to file."""
self.rss.write(self.rssfn)
class HtmlEventHandler(EventHandler):
"""Output in HTML format."""
def fnFromDate(self, date):
"""Get filename from date."""
fn = time.strftime('comics-%Y%m%d.html', date)
fn = os.path.join(self.basepath, 'html', fn)
fn = os.path.abspath(fn)
return fn
def start(self):
"""Start HTML output."""
today = time.time()
yesterday = today - 86400
tomorrow = today + 86400
today = time.localtime(today)
yesterday = time.localtime(yesterday)
tomorrow = time.localtime(tomorrow)
fn = self.fnFromDate(today)
if os.path.exists(fn):
raise ValueError('output file %r already exists' % fn)
d = os.path.dirname(fn)
if not os.path.isdir(d):
os.makedirs(d)
yesterdayUrl = self.getUrlFromFilename(self.fnFromDate(yesterday))
tomorrowUrl = self.getUrlFromFilename(self.fnFromDate(tomorrow))
self.html = file(fn, 'w')
self.html.write('''
Comics for %s
Previous Day | Next Day
''' % (time.strftime('%Y/%m/%d', today), yesterdayUrl, tomorrowUrl))
self.lastComic = None
def comicDownloaded(self, comic, filename):
"""Write HTML entry for downloaded comic."""
if self.lastComic != comic:
self.newComic(comic)
url = self.getUrlFromFilename(filename)
self.html.write(' - %s
\n' % (url, os.path.basename(filename)))
def newComic(self, comic):
"""Start new comic list in HTML."""
if self.lastComic is not None:
self.html.write('
\n')
self.lastComic = comic
self.html.write(''' %s
''' % (comic,))
def end(self):
"""End HTML output."""
if self.lastComic is not None:
self.html.write('
\n')
self.html.write('''
''')
self.html.close()
handlers = {
'html': HtmlEventHandler,
'rss': RSSEventHandler,
}
def getHandlers():
"""Get sorted handler names."""
return sorted(handlers.keys())
_handler = EventHandler(".", None)
def installHandler(name, basepath=None, baseurl=None):
"""Install a global handler with given name."""
global _handler
if basepath is None:
basepath = '.'
_handler = handlers[name](basepath, baseurl)
def getHandler():
"""Get installed event handler."""
return _handler