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# SPDX-License-Identifier: AGPL-3.0-or-later
from typing import ClassVar
from django.urls import reverse_lazy
from django.utils.translation import gettext_lazy as _
from plinth import app
class Menu(app.FollowerComponent):
"""Component to manage a single menu item."""
_all_menus: ClassVar[set['Menu']] = set()
def __init__(self, component_id: str, name: str | None = None,
icon: str | None = None, tags: list[str] | None = None,
url_name: str | None = None, url_args: list | None = None,
url_kwargs: dict | None = None,
parent_url_name: str | None = None, order: int = 50,
advanced: bool = False):
"""Initialize a new menu item with basic properties.
name is the label of the menu item.
icon is the icon to be displayed for the menu item. Icon can be the
name of a glyphicon from the Fork Awesome font's icon set:
https://forkawesome.github.io/Fork-Awesome/icons/. In this case, the
icon name starts with the string 'fa-'. Alternatively, the icon can
also be a file under the directory plinth/modules/<app>/static/icons/,
provided without an extension. SVG icons are preferred. Currently, both
PNG and SVG icons with the same name are used. For example, if the
value of icon is 'myicon' and app_id in App class is 'myapp', then two
icons files plinth/modules/myapp/static/icons/myicon.svg and
plinth/modules/myapp/static/icons/myicon.png are used in the interface.
tags is a list of tags that describe the app. Tags help users to find
similar apps or alternatives and discover use cases.
url_name is the name of url location that will be activated when the
menu item is selected. This is not optional. url_args and url_kwargs
are sent to reverse() when resolving url from url_name.
parent_url_name optionally specifies the menu item under which this
menu item should become a child.
order is the numerical rank of this item within the menu. Lower order
items appear closest to the top/left of the menu. By convention, we use
the spectrum between 0 and 100 to rank orders, but feel free to
disregard that. If you need more granularity, don't bother renumbering
things. Feel free to use fractional orders.
advanced decides whether to show the menu item only in advanced mode.
"""
super().__init__(component_id)
if not url_name:
raise ValueError('Valid url_name is expected')
url = reverse_lazy(url_name, args=url_args, kwargs=url_kwargs)
self.name = name
self.icon = icon
self.tags = tags
self.url = url
self.order = order
self.advanced = advanced
self.url_name = url_name
self.url_args = url_args
self.url_kwargs = url_kwargs
self.parent_url_name = parent_url_name
# Add self to global list of menu items.
self._all_menus.add(self)
@property
def items(self):
"""Return the list of children for this menu item."""
return [
item for item in self._all_menus
if item.parent_url_name == self.url_name
]
def sorted_items(self):
"""Return menu items in sorted order according to current locale."""
return sorted(self.items, key=lambda x: (x.order, x.name.lower()))
def active_item(self, request):
"""Return the first active item (e.g. submenu) that is found."""
for item in self.items:
if request.path.startswith(str(item.url)):
return item
return None
@staticmethod
def get_with_url_name(url_name: str) -> 'Menu':
"""Return a menu item with given URL name.
Raise LookupError of the request item is not found.
"""
for item in Menu._all_menus:
if item.url_name == url_name:
return item
raise LookupError
main_menu = None
def init():
"""Create main menu and other essential menus."""
global main_menu
main_menu = Menu('menu-index', name=_('Home'), url_name='index')
Menu('menu-apps', name=_('Apps'), icon='fa-download', url_name='apps',
parent_url_name='index')
Menu('menu-system', name=_('System'), icon='fa-cog', url_name='system',
parent_url_name='index')
Menu('menu-system-visibility', name=_('Visibility'), icon='fa-cog',
url_name='system:visibility', parent_url_name='system', order=10)
Menu('menu-system-data', name=_('Data'), icon='fa-cog',
url_name='system:data', parent_url_name='system', order=20)
Menu('menu-system-system', name=_('System'), icon='fa-cog',
url_name='system:system', parent_url_name='system', order=30)
Menu('menu-system-security', name=_('Security'), icon='fa-cog',
url_name='system:security', parent_url_name='system', order=40)
Menu('menu-system-administration', name=_('Administration'), icon='fa-cog',
url_name='system:administration', parent_url_name='system', order=50)
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