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routes.py
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routes.py
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import importlib
from typing import List
import dash
from dash.dependencies import Input, Output
from components import notfound
from environment import settings
from utils.routing import find_module_names_in_path, walk_package, PathUtil
from components.navigation import sidebar
def _find_layouts_and_init_callbacks(app: dash.Dash):
page_names: List[PathUtil] = []
package_structure = walk_package('pages')
for package in package_structure:
top_files = find_module_names_in_path(package)
# pages/<top_files>/layout.py ??
if 'callbacks' in top_files:
# noinspection PyUnresolvedReferences
importlib.import_module(PathUtil([*package.pieces, 'callbacks'], []).mod_path()).callbacks(app)
if 'layout' in top_files:
# layout exists, so no sublayouts should exist
layout_path = [*package.pieces, 'layout']
current_top_page = PathUtil(layout_path, [])
page_names.append(current_top_page)
else:
layout_path = [*package.pieces]
current_top_page = PathUtil(layout_path, [])
sub_packages = walk_package(package.fs_path())
for sub in sub_packages:
sub.prepend_piece('pages')
sub_files = find_module_names_in_path(sub)
# pages/<top_files>/<sub_files>/layout.py ??
if 'callbacks' in sub_files:
# noinspection PyUnresolvedReferences
importlib.import_module(PathUtil([*sub.pieces, 'callbacks'], []).mod_path()).callbacks(app)
if 'layout' in sub_files:
# sub module is a layout module
layout_path = [*sub.pieces, 'layout']
# page_names.append(PathUtil(layout_path))
current_top_page.children.append(PathUtil(layout_path, []))
page_names.append(current_top_page)
return page_names
def setup_routing(app: dash.Dash) -> List[PathUtil]:
pages = _find_layouts_and_init_callbacks(app)
# modules = {x.url(): {'module': importlib.import_module(x.mod_path()),
# 'path': x} for x in pages}
modules = {}
for p in pages:
if p.is_page():
modules[p.url()] = {
'module': importlib.import_module(p.mod_path()), 'path': p, 'is-child': False
}
for ch in p.children:
modules[ch.url()] = {
'module': importlib.import_module(ch.mod_path()), 'path': ch, 'is-child': True, 'parent': p
}
@app.callback(Output("page-content", "children"), [Input("url", "pathname")])
def render_page_content(pathname):
curr_path = None
if pathname in modules:
curr_path = modules[pathname]
elif settings.DEFAULT_URL in modules:
curr_path = modules[settings.DEFAULT_URL]
sections = []
if curr_path['is-child']:
sections.append(sidebar(curr_path['parent'].children))
if curr_path is not None:
sections.append(curr_path['module'].layout)
else:
sections.append(notfound)
return dash.html.Div(className='d-flex flex-row', children=sections)
return pages