support: Show file upload usage compared to realm upload quota.

Implemented on Zulip Cloud support view only since this information
isn't relevant for self-hosted support actions.

Looking up the realm's currently used upload space adds 3 database
queries to the support view test as there is no RealmCount data for
the upload quota used in the test. And therefore installation_epoch
is called for the realm.

With RealmCount upload quota used data, only 2 additional database
queries would be made for the realm's support view data.

corporate/lib/support.py

@@ -126,12 +126,32 @@ class CloudSupportData:
     plan_data: PlanData
     sponsorship_data: SponsorshipData
     user_data: UserData
+    file_upload_usage: str
 
 
 def get_stripe_customer_url(stripe_id: str) -> str:
     return f"https://dashboard.stripe.com/customers/{stripe_id}"  # nocoverage
 
 
+def get_formatted_realm_upload_space_used(realm: Realm) -> str:  # nocoverage
+    realm_bytes_used = realm.currently_used_upload_space_bytes()
+    files_uploaded = realm_bytes_used > 0
+
+    realm_uploads = "No uploads"
+    if files_uploaded:
+        realm_uploads = str(round(realm_bytes_used / 1024 / 1024, 2))
+
+    quota = realm.upload_quota_bytes()
+    if quota is None:
+        if files_uploaded:
+            return f"{realm_uploads} MB / No quota"
+        return f"{realm_uploads} / No quota"
+    if quota == 0:
+        return f"{realm_uploads} / 0.0 MB"
+    quota_mb = round(quota / 1024 / 1024, 2)
+    return f"{realm_uploads} / {quota_mb} MB"
+
+
 def get_realm_user_data(realm: Realm) -> UserData:
     non_guests = get_non_guest_user_count(realm)
     guests = get_guest_user_count(realm)
@@ -477,4 +497,5 @@ def get_data_for_cloud_support_view(billing_session: BillingSession) -> CloudSup
         plan_data=plan_data,
         sponsorship_data=sponsorship_data,
         user_data=user_data,
+        file_upload_usage=get_formatted_realm_upload_space_used(billing_session.realm),
     )

corporate/tests/test_support_views.py

@@ -751,7 +751,7 @@ class TestSupportEndpoint(ZulipTestCase):
     def test_realm_support_view_queries(self) -> None:
         iago = self.example_user("iago")
         self.login_user(iago)
-        with self.assert_database_query_count(19):
+        with self.assert_database_query_count(22):
             result = self.client_get("/activity/support", {"q": "zulip"}, subdomain="zulip")
             self.assertEqual(result.status_code, 200)
 

templates/corporate/support/realm_details.html

@@ -55,6 +55,8 @@
         {% set user_data = realm_support_data[realm.id].user_data %}
         {% include 'corporate/support/basic_realm_data.html' %}
     {% endwith %}
+    <br />
+    <b>File upload usage</b>: {{ realm_support_data[realm.id].file_upload_usage }}<br />
 </div>
 <div>
     <div class="realm-management-actions">