import locale

import RSS
ns = RSS.ns

def generate_rss(baseurl, files):
    galleries = RSS.CollectionChannel()
    galleries.setMD((ns.rss10, "channel"), {
        (ns.rss10, "title"): "Photos", # read from meta.rdf too?
        (ns.rss10, "link"): baseurl
        })
     
    for f in files:
        try:
            channel = RSS.CollectionChannel()
            channel.parse(f)
            meta = channel.getMD((RSS.ns.rss10, "channel"))
            item = {}
            item[(ns.rss10, 'link')] = meta[(ns.rss10, "link")] #+ "index.rss"
            item[(ns.rss10, 'title')] = meta[(ns.rss10, "title")]
            if meta.has_key((ns.rss10, "description")):
                item[(ns.rss10, 'description')] = meta[(ns.rss10, "description")]
            item[(ns.dc, 'type')] = "Collection"
            if meta.has_key((ns.dc, "date")):
                item[(ns.dc, 'date')] = meta[(ns.dc, "date")]
            if meta.has_key((ns.rawk, "title-image")):
                item[(ns.rawk, 'title-image')] = meta[(ns.rawk, "title-image")] # TODO: what does Picdiary do here?
            galleries.addItem(item, -1)
        except Exception, e:
            import sys; sys.stderr.write("Exception %s when handling %s\n" % (e, f))

    def sorter(a, b):
        key = (ns.dc, "date")
        # TODO: sort items without a date first or something
        return locale.strcoll(galleries.getItem(b)[key], galleries.getItem(a)[key])
    galleries.listItems().sort(sorter)
    return galleries