med/sporz/admin.py

# -*- mode: python; coding: utf-8 -*-
# Copyright (C) 2017-2019 by BDE ENS Paris-Saclay
# SPDX-License-Identifier: GPL-3.0-or-later

from django.contrib import admin
from django.contrib.auth import get_user_model
from django.db.models import Q

from med.admin import admin_site
from .models import GameSave, Player


class PlayerInline(admin.TabularInline):
    model = Player

    # Do not always show extra players
    extra = 0
    min_num = 5


class GameSaveAdmin(admin.ModelAdmin):
    inlines = [PlayerInline, ]
    list_display = ('__str__', 'game_master', 'game_has_ended')
    date_hierarchy = 'created_at'
    autocomplete_fields = ('game_master',)

    def has_change_permission(self, request, obj=None):
        """
        If user is game master then authorize edit
        """
        if obj and obj.game_master == request.user:
            return True
        return super().has_change_permission(request, obj)

    def has_delete_permission(self, request, obj=None):
        """
        If user is game master then authorize deletion
        """
        if obj and obj.game_master == request.user:
            return True
        return super().has_delete_permission(request, obj)

    def add_view(self, request, form_url='', extra_context=None):
        """
        Autoselect game master when creating a new game
        """
        # Make GET data mutable
        data = request.GET.copy()
        data['game_master'] = request.user
        request.GET = data
        return super().add_view(request, form_url, extra_context)

    def formfield_for_foreignkey(self, db_field, request, **kwargs):
        """
        Authorize game master change only if user can see all users
        """
        if db_field.name == 'game_master':
            if not request.user.has_perm('users.view_user'):
                kwargs['queryset'] = get_user_model().objects.filter(
                    username=request.user.username)
        return super().formfield_for_foreignkey(db_field, request, **kwargs)

    def get_queryset(self, request):
        """
        List all game save only if user has view permission
        else, list only own games and ended games
        """
        queryset = super().get_queryset(request)
        if request.user.has_perm('sporz.view_gamesave'):
            return queryset
        return queryset.filter(
            Q(game_master=request.user) | Q(game_has_ended=True)
        )


admin_site.register(GameSave, GameSaveAdmin)