# -*- coding: utf-8 -*-
"""
    simplewiki.specialpages
    ~~~~~~~~~~~~~~~~~~~~~~~

    This module contains special pages such as the recent changes page.


    :copyright: Copyright 2007 by Armin Ronacher.
    :license: BSD.
"""
from simplewiki.utils import Response, Pagination, generate_template, href
from simplewiki.database import RevisionedPage, Page
from simplewiki.actions import page_missing



def page_index(request):
    """Index of all pages."""
    letters = {}
    for page in Page.query.order_by(Page.name):
        letters.setdefault(page.name.capitalize()[0], []).append(page)
    return Response(generate_template('page_index.html',
        letters=sorted(letters.items())
    ))


def recent_changes(request):
    """Display the recent changes."""
    page = max(1, request.args.get('page', type=int))
    query = RevisionedPage.query \
        .order_by(RevisionedPage.revision_id.desc())
    return Response(generate_template('recent_changes.html',
        pagination=Pagination(query, 20, page, 'Special:Recent_Changes')
    ))


def page_not_found(request, page_name):
    """
    Displays an error message if a user tried to access
    a not existing special page.
    """
    return page_missing(request, page_name, True)


pages = {
    'Index':            page_index,
    'Recent_Changes':   recent_changes
}
