feat: very minimal CSV export of users and maps in admin

fix #2020

umap/admin.py

@@ -1,8 +1,31 @@
+import csv
+
+from django.contrib.auth.admin import UserAdmin as UserAdminBase
+from django.contrib.auth.models import User
 from django.contrib.gis import admin
+from django.http import HttpResponse
+from django.utils.translation import gettext_lazy as _
 
 from .models import DataLayer, Licence, Map, Pictogram, Team, TileLayer
 
 
+class CSVExportMixin:
+    actions = ["as_csv"]
+
+    @admin.action(description=_("CSV Export"))
+    def as_csv(self, request, queryset):
+        response = HttpResponse(
+            content_type="text/csv",
+            headers={"Content-Disposition": 'attachment; filename="export.csv"'},
+        )
+
+        writer = csv.writer(response)
+        writer.writerow(self.csv_fields)
+        for user in queryset:
+            writer.writerow(getattr(user, field) for field in self.csv_fields)
+        return response
+
+
 class TileLayerAdmin(admin.ModelAdmin):
     list_display = (
         "name",
@@ -11,10 +34,22 @@ class TileLayerAdmin(admin.ModelAdmin):
     list_editable = ("rank",)
 
 
-class MapAdmin(admin.GISModelAdmin):
+class MapAdmin(CSVExportMixin, admin.GISModelAdmin):
     search_fields = ("name",)
     autocomplete_fields = ("owner", "editors")
     list_filter = ("share_status",)
+    csv_fields = (
+        "pk",
+        "name",
+        "center",
+        "zoom",
+        "created_at",
+        "modified_at",
+        "edit_status",
+        "share_status",
+        "owner_id",
+        "team_id",
+    )
 
 
 class PictogramAdmin(admin.ModelAdmin):
@@ -30,9 +65,23 @@ class TeamAdmin(admin.ModelAdmin):
     filter_horizontal = ("users",)
 
 
+class UserAdmin(CSVExportMixin, UserAdminBase):
+    csv_fields = [
+        "pk",
+        "username",
+        "email",
+        "first_name",
+        "last_name",
+        "last_login",
+        "date_joined",
+    ]
+
+
 admin.site.register(Map, MapAdmin)
 admin.site.register(DataLayer)
 admin.site.register(Pictogram, PictogramAdmin)
 admin.site.register(TileLayer, TileLayerAdmin)
 admin.site.register(Licence)
 admin.site.register(Team, TeamAdmin)
+admin.site.unregister(User)
+admin.site.register(User, UserAdmin)