Creating a MenuList : Django Admin App

django_nav_menu_maker.py

from collections import OrderedDict
from django.urls import resolve
from django.urls import reverse


def get_menu(context):
    # [ 'display name', 'level 1 parent (optional)', 'django url', 'css icon', 'level 2 parent (optional)']
    menus = [
        ['solo', '', 'solo_url', 'fa fa-desktop'],
        ['test', '', '', 'fa fa-desktop'],
        ['test1', 'test', '', ''],
        ['test2', 'test', 'all_items', '', 'test1'],
        ['test3', 'test', 'all_items2', '', 'test1'],
        ['test4', 'test', 'all_items3', '', 'test1'],
        ['test5', 'test', '', ''],
        ['test6', 'test', 'all_items', '', 'test5'],
        ['test7', 'test', 'all_items2', '', 'test5'],
        ['test8', 'test', 'all_items3', '', 'test5'],
    ]
    
    menuList = OrderedDict()
    for s in menus:
        if s[1] != '' and len(s) == 4:
            if 'level2_childs' not in menuList[s[1]]:
                menuList[s[1]]['level2_childs'] = {s[0]: []}
            else:
                menuList[s[1]]['level2_childs'][s[0]] = []

        if s[1] != '':
            if len(s) > 4:
                var = menuList[s[1]]['level2_childs'][s[4]]
                var.append(s)
            else:
                menuList[s[1]]['childs'].append(s)
            if s[2] != '':
                s[2] = reverse(s[2])
                s.append(resolve(s[2]).url_name)
        else:
            menuList[s[0]] = {}
            menuList[s[0]]['childs'] = []
            menuList[s[0]]['icon'] = s[3]
            menuList[s[0]]['link_name'] = s[2]
            if s[2] != '':
                menuList[s[0]]['link'] = reverse(s[2])

    try:
        current_url = resolve(context.path_info).url_name
    except Exception as e:
        print('current url unable to detect in pages context', e)
    else:
        for key, value in menuList.items():
            if menuList[key]['link_name'] == current_url:
                menuList[key]['active'] = 'active'
                break
            elif len(menuList[key]['childs']) > 0:
                for i in range(0, len(menuList[key]['childs'])):
                    if menuList[key]['childs'][i][3] == current_url:
                        # menuList[key]['childs'][i].append('active')
                        menuList[key]['active'] = 'active'
                        break

            if 'level2_childs' in menuList[key]:
                for level1_key in menuList[key]['level2_childs']:
                    arr = menuList[key]['level2_childs'][level1_key]
                    for i in range(0, len(arr)):
                        if arr[i][-1] == current_url:
                            arr[i].append('active')
                            menuList[key]['active'] = 'active'
                            break

    return {'menu_list': menuList}
 

# Custom Filter
'''
@register.filter(name='get_length_by_key')
def get_length_by_key(val, key):
    return len(val[key])


@register.filter(name='get_array_inside_dict_by_key')
def get_array_inside_dict_by_key(val, key):
    return val[key]
'''
    
# Sample HTML
'''
<!-- using CSS from Inspinia Admin Template http://webapplayers.com/inspinia_admin-v2.9.1/ --->

{% for key, values in menu_list.items %}
    <li class="{{ values.active }}">
        <a href="{{ values.link }}">
            <i class="{{ values.icon }}"></i>
            <span class="nav-label">{{ key }}</span>
            {% if values.childs|length > 0 %}
                <span class="fa arrow"></span>
            {% endif %}
        </a>
        {% if values.childs|length > 0 %}
            <ul class="nav nav-second-level collapse">
                {% for secondLevelMenu in values.childs %}
                    <li class="{{ secondLevelMenu.4 }}">
                        <a href="{{ secondLevelMenu.2 }}">
                            {{ secondLevelMenu.0 }}

                          {% if values.level2_childs|get_length_by_key:secondLevelMenu.0 > 0 %}
                            <span class="fa arrow"></span>
                          {% endif %}
                        </a>

                        {% if values.level2_childs|get_length_by_key:secondLevelMenu.0 > 0 %}
                            <ul class="nav nav-third-level collapse" aria-expanded="false">
                              {% for thirdLevelMenu in values.level2_childs|get_array_inside_dict_by_key:secondLevelMenu.0 %}
                                <li class="{{ thirdLevelMenu.6 }}">
                                    <a href="{{ thirdLevelMenu.2 }}">
                                        {{ thirdLevelMenu.0 }}
                                    </a>
                                </li>
                              {% endfor %}
                            </ul>
                        {% endif %}

                    </li>
                {% endfor %}
            </ul>
        {% endif %}
    </li>
{% endfor %}
'''