Source code for config.admin

"""The admin models of the config app."""

from typing import Optional

from django.conf import settings
from django.contrib import admin, redirects, sites
from django.contrib.flatpages.admin import FlatPageAdmin
from django.contrib.flatpages.forms import FlatpageForm
from django.contrib.flatpages.models import FlatPage
from django.forms import ModelForm
# XXX: Forward reference warning when under TYPE_CHECKING
from django.http import HttpRequest

from MangAdventure.widgets import TinyMCE

admin.site.site_header = f'{settings.CONFIG["NAME"]} Administration'
admin.site.site_title = admin.site.site_header


class InfoPageForm(FlatpageForm):
    """Admin form for :class:`InfoPage`."""
    def __init__(self, *args, **kwargs):
        # bypass FlatpageForm.__init__
        super(FlatpageForm, self).__init__(*args, **kwargs)

    class Meta:
        fields = '__all__'
        model = FlatPage
        widgets = {
            'content': TinyMCE(attrs={
                'mce_plugins': 'textcolor colorpicker lists advlist link'
                               ' charmap visualchars code table image',
                'mce_menubar': 'edit view format table',
                'mce_toolbar': ' | '.join((
                    'undo redo', 'cut copy paste',
                    'formatselect forecolor backcolor',
                    'alignleft aligncenter alignright alignjustify',
                    'bold italic underline strikethrough',
                    'bullist numlist', 'link unlink image charmap'
                )),
                'mce_valid_children': '+body[style]',
                'mce_extended_valid_elements': 'style[type]',
            })
        }


class InfoPage(FlatPage):
    """:class:`django.contrib.flatpages.admin.FlatPage` proxy model."""
    class Meta:
        proxy = True
        auto_created = True
        app_label = 'config'
        verbose_name = 'info page'


class InfoPageAdmin(FlatPageAdmin):
    """Admin model for :class:`InfoPage`."""
    change_list_template = 'admin/change_list.html'
    change_list_form = ModelForm
    form = InfoPageForm
    fieldsets = (
        (None, {'fields': ('url', 'title', 'content')}),
    )
    readonly_fields = ('url',)
    list_filter = ()

    def has_add_permission(self, request: 'HttpRequest') -> bool:
        """
        Return whether adding an ``InfoPage`` object is permitted.

        :param request: The original request.

        :return: Always returns ``False``.
        """
        return False

    def has_delete_permission(self, request: 'HttpRequest',
                              obj: Optional[InfoPage] = None) -> bool:
        """
        Return whether deleting an ``InfoPage`` object is permitted.

        :param request: The original request.
        :param obj: The object to be deleted.

        :return: Always returns ``False``.
        """
        return False


class Site(sites.models.Site):
    """:class:`django.contrib.sites.models.Site` proxy model."""
    class Meta:
        proxy = True
        auto_created = True
        app_label = 'config'


class SiteAdmin(sites.admin.SiteAdmin):
    """Admin model for :class:`Site`."""
    change_list_template = 'admin/change_list.html'
    change_list_form = ModelForm

    def has_delete_permission(self, request: 'HttpRequest',
                              obj: Optional[Site] = None) -> bool:
        """
        Return whether deleting an ``Site`` object is permitted.

        :param request: The original request.
        :param obj: The object to be deleted.

        :return: Returns ``False`` for the first site, otherwise calls
                 :meth:`django.contrib.admin.ModelAdmin.has_delete_permission`.
        """
        if getattr(obj, 'pk', 0) == 1:
            return False
        return super(SiteAdmin, self).has_delete_permission(request, obj)


class Redirect(redirects.models.Redirect):
    """:class:`django.contrib.redirects.models.Redirect` proxy model."""
    class Meta:
        proxy = True
        auto_created = True
        app_label = 'config'


class RedirectAdmin(redirects.admin.RedirectAdmin):
    """Admin model for :class:`Redirect`."""
    change_list_template = 'admin/change_list.html'
    change_list_form = ModelForm


admin.site.unregister((
    FlatPage, sites.models.Site, redirects.models.Redirect
))
admin.site.register(Site, SiteAdmin)
admin.site.register(Redirect, RedirectAdmin)
admin.site.register(InfoPage, InfoPageAdmin)

__all__ = [
    'InfoPageForm', 'InfoPageAdmin', 'InfoPage',
    'Site', 'SiteAdmin', 'Redirect', 'RedirectAdmin'
]