[GREEN] Add download_acara_donor action to JadwalDonorAdmin

backend/donor/admin.py

 from django.contrib import admin
+from django.http import HttpResponse
 
 from donor.models import JadwalDonor, DaftarDonor
 
 
+def download_jadwaldonor(modeladmin, request, queryset):
+    import pandas as pd
+    from django_pandas.io import read_frame
+
+    response = HttpResponse(content_type='application/vnd.openxmlformats-officedocument.spreadsheetml.sheet')
+    response['Content-Disposition'] = f'attachment; filename={modeladmin.model._meta}.xlsx'
+
+    df = read_frame(queryset)
+    df['time_start'] = df['time_start'].dt.tz_localize(None)
+    df['time_end'] = df['time_end'].dt.tz_localize(None)
+
+    writer = pd.ExcelWriter(response, engine='xlsxwriter')
+    df.to_excel(writer, sheet_name='Sheet1')
+
+    workbook = writer.book
+    workbook.close()
+
+    return response
+
+
+download_jadwaldonor.short_description = 'Download Jadwal Donor as Excel Workbook'
+
+
 @admin.register(JadwalDonor)
 class JadwalDonorAdmin(admin.ModelAdmin):
     list_filter = ('kecamatan', 'time_start', 'category')
+    actions = [download_jadwaldonor]
 
 
 @admin.register(DaftarDonor)