+class SponsorProvider(object):
+ class NoLogo(UnicodeException): pass
+
+ def by_name(self, name):
+ raise NotImplementedError
+
+class DirSponsorProvider(SponsorProvider):
+ exts = ["png", "jpg", "jpeg", "gif"]
+
+ def __init__(self, dir_):
+ self.dir = dir_
+
+ def by_name(self, name):
+ base = name.replace("/", "_")
+ fnames = ["%s.%s" % (base, ext) for ext in self.exts]
+ for fname in fnames:
+ fpath = os.path.join(self.dir, fname)
+ if os.path.exists(fpath):
+ return OutputFile.from_filename(fpath)
+ raise self.NoLogo('Missing sponsor logo: "%s.[%s]"' % (base, ",".join(self.exts)))