OutFleet/vpn/admin.py

import json
from polymorphic.admin import (
    PolymorphicParentModelAdmin,
)
from django.contrib import admin
from django.utils.safestring import mark_safe
from django.db.models import Count

from django.contrib.auth.admin import UserAdmin
from .models import User, AccessLog
from django.utils.timezone import localtime
from vpn.models import User, ACL, ACLLink
from vpn.forms import UserForm
from mysite.settings import EXTERNAL_ADDRESS
from .server_plugins import (
    Server,
    WireguardServer,
    WireguardServerAdmin,
    OutlineServer,
    OutlineServerAdmin)


admin.site.site_title = "VPN Manager"
admin.site.site_header = "VPN Manager"
admin.site.index_title = "OutFleet"

def format_object(data):
    try:  
        if isinstance(data, dict):
            formatted_data = json.dumps(data, indent=2)
            return mark_safe(f"<pre>{formatted_data}</pre>")
        elif isinstance(data, str):
            return mark_safe(f"<pre>{data}</pre>")
        else:
            return mark_safe(f"<pre>{str(data)}</pre>")
    except Exception as e:
        return mark_safe(f"<span style='color: red;'>Error: {e}</span>")

class UserNameFilter(admin.SimpleListFilter):
    title = 'User'
    parameter_name = 'user'

    def lookups(self, request, model_admin):
        users = set(User.objects.values_list('username', flat=True))
        return [(user, user) for user in users]

    def queryset(self, request, queryset):
        if self.value():
            return queryset.filter(user__username=self.value())
        return queryset

class ServerNameFilter(admin.SimpleListFilter):
    title = 'Server Name'
    parameter_name = 'acl__server__name'

    def lookups(self, request, model_admin):
        servers = set(ACL.objects.values_list('server__name', flat=True))
        return [(server, server) for server in servers]

    def queryset(self, request, queryset):
        if self.value():
            return queryset.filter(acl__server__name=self.value())
        return queryset

@admin.register(Server)
class ServerAdmin(PolymorphicParentModelAdmin):
    base_model = Server
    child_models = (OutlineServer, WireguardServer)
    list_display = ('name', 'server_type', 'comment', 'registration_date', 'user_count', 'server_status_inline')
    search_fields = ('name', 'comment')
    list_filter = ('server_type', )

    @admin.display(description='User Count', ordering='user_count')
    def user_count(self, obj):
        return obj.user_count

    @admin.display(description='Status')
    def server_status_inline(self, obj):
        status = obj.get_server_status()
        if 'error' in status:
            return mark_safe(f"<span style='color: red;'>Error: {status['error']}</span>")
        import json
        pretty_status =  ", ".join(f"{key}: {value}" for key, value in status.items())
        return mark_safe(f"<pre>{pretty_status}</pre>")
    server_status_inline.short_description = "Status"

    def get_queryset(self, request):
        qs = super().get_queryset(request)
        qs = qs.annotate(user_count=Count('acl'))
        return qs

#admin.site.register(User, UserAdmin)
@admin.register(User)
class UserAdmin(admin.ModelAdmin):
    form = UserForm
    list_display = ('username', 'comment', 'registration_date', 'hash', 'server_count')
    search_fields = ('username', 'hash')
    readonly_fields = ('hash',)


    @admin.display(description='Allowed servers', ordering='server_count')
    def server_count(self, obj):
        return obj.server_count

    def get_queryset(self, request):
        qs = super().get_queryset(request)
        qs = qs.annotate(server_count=Count('acl'))
        return qs

    def save_model(self, request, obj, form, change):
        super().save_model(request, obj, form, change)
        selected_servers = form.cleaned_data.get('servers', [])

        ACL.objects.filter(user=obj).exclude(server__in=selected_servers).delete()

        for server in selected_servers:
            ACL.objects.get_or_create(user=obj, server=server)

@admin.register(AccessLog)
class AccessLogAdmin(admin.ModelAdmin):
    list_display = ('user', 'server', 'action', 'formatted_timestamp')
    list_filter = ('user', 'server', 'action', 'timestamp')
    search_fields = ('user', 'server', 'action', 'timestamp')
    readonly_fields = ('server', 'user', 'formatted_timestamp', 'action', 'formated_data')

    @admin.display(description='Timestamp')
    def formatted_timestamp(self, obj):
        local_time = localtime(obj.timestamp)
        return local_time.strftime('%Y-%m-%d %H:%M:%S %Z')
    
    @admin.display(description='Details')
    def formated_data(self, obj):
        return format_object(obj.data)


class ACLLinkInline(admin.TabularInline):
    model = ACLLink
    extra = 1
    help_text = 'Add or change ACL links'
    verbose_name = 'Dynamic link'
    verbose_name_plural = 'Dynamic links'
    fields = ('link', 'comment')

@admin.register(ACL)
class ACLAdmin(admin.ModelAdmin):

    list_display = ('user', 'server', 'server_type', 'display_links', 'created_at')
    #list_editable = ('server', )
    list_filter = (UserNameFilter, 'server__server_type', ServerNameFilter)
    search_fields = ('user__name', 'server__name', 'server__comment', 'user__comment', 'links__link')
    readonly_fields = ('user_info',)
    inlines = [ACLLinkInline]

    @admin.display(description='Server Type', ordering='server__server_type')
    def server_type(self, obj):
        return obj.server.get_server_type_display()

    @admin.display(description='Client info')
    def user_info(self, obj):
        server = obj.server
        user = obj.user
        try:
            data = server.get_user(user)
            return format_object(data)
        except Exception as e:
            return mark_safe(f"<span style='color: red;'>Error: {e}</span>")

    @admin.display(description='Dynamic Config Links')
    def display_links(self, obj):
        links = obj.links.all()
        formatted_links = [f"{EXTERNAL_ADDRESS}/ss/{link.link}#{link.acl.server.name}" for link in links]
        return mark_safe('<br>'.join(formatted_links))