Expose storage size limit for namespaces in GraphQL

Exposes the storage size limit of a namespace in GraphQL so we
can use it in the UI to render the storage graph with the correct
distribution depending on the limit.

app/graphql/types/namespace_type.rb

@@ -27,6 +27,9 @@ module Types
           description: 'Indicates if Large File Storage (LFS) is enabled for namespace'
     field :request_access_enabled, GraphQL::BOOLEAN_TYPE, null: true,
           description: 'Indicates if users can request access to namespace'
+    field :storage_size_limit, GraphQL::INT_TYPE, null: true,
+          description: 'Total storage limit of the root namespace in bytes',
+          resolve: -> (obj, _args, _ctx) { Namespace::RootStorageSize.new(obj).limit }
 
     field :root_storage_statistics, Types::RootStorageStatisticsType,
           null: true,

changelogs/unreleased/nicolasdular-expose-storage-limit-in-api.yml

+---
+title: Expose storage size limit for namespaces in GraphQL
+merge_request: 34882
+author:
+type: changed

doc/api/graphql/reference/gitlab_schema.graphql

@@ -5023,6 +5023,11 @@ type Group {
   """
   shareWithGroupLock: Boolean
 
+  """
+  Total storage limit of the root namespace in bytes
+  """
+  storageSizeLimit: Int
+
   """
   The permission level required to create subgroups within the group
   """
@@ -7742,6 +7747,11 @@ type Namespace {
   """
   rootStorageStatistics: RootStorageStatistics
 
+  """
+  Total storage limit of the root namespace in bytes
+  """
+  storageSizeLimit: Int
+
   """
   Visibility of the namespace
   """

doc/api/graphql/reference/gitlab_schema.json

@@ -13756,6 +13756,20 @@
               "isDeprecated": false,
               "deprecationReason": null
             },
+            {
+              "name": "storageSizeLimit",
+              "description": "Total storage limit of the root namespace in bytes",
+              "args": [
+
+              ],
+              "type": {
+                "kind": "SCALAR",
+                "name": "Int",
+                "ofType": null
+              },
+              "isDeprecated": false,
+              "deprecationReason": null
+            },
             {
               "name": "subgroupCreationLevel",
               "description": "The permission level required to create subgroups within the group",
@@ -22977,6 +22991,20 @@
               "isDeprecated": false,
               "deprecationReason": null
             },
+            {
+              "name": "storageSizeLimit",
+              "description": "Total storage limit of the root namespace in bytes",
+              "args": [
+
+              ],
+              "type": {
+                "kind": "SCALAR",
+                "name": "Int",
+                "ofType": null
+              },
+              "isDeprecated": false,
+              "deprecationReason": null
+            },
             {
               "name": "visibility",
               "description": "Visibility of the namespace",

doc/api/graphql/reference/index.md

@@ -745,6 +745,7 @@ Autogenerated return type of EpicTreeReorder
 | `requireTwoFactorAuthentication` | Boolean | Indicates if all users in this group are required to set up two-factor authentication |
 | `rootStorageStatistics` | RootStorageStatistics | Aggregated storage statistics of the namespace. Only available for root namespaces |
 | `shareWithGroupLock` | Boolean | Indicates if sharing a project with another group within this group is prevented |
+| `storageSizeLimit` | Int | Total storage limit of the root namespace in bytes |
 | `subgroupCreationLevel` | String | The permission level required to create subgroups within the group |
 | `twoFactorGracePeriod` | Int | Time before two-factor authentication is enforced |
 | `userPermissions` | GroupPermissions! | Permissions for the current user on the resource |
@@ -1157,6 +1158,7 @@ Represents a milestone.
 | `path` | String! | Path of the namespace |
 | `requestAccessEnabled` | Boolean | Indicates if users can request access to namespace |
 | `rootStorageStatistics` | RootStorageStatistics | Aggregated storage statistics of the namespace. Only available for root namespaces |
+| `storageSizeLimit` | Int | Total storage limit of the root namespace in bytes |
 | `visibility` | String | Visibility of the namespace |
 
 ## Note

spec/graphql/types/namespace_type_spec.rb

@@ -8,7 +8,7 @@ describe GitlabSchema.types['Namespace'] do
   it 'has the expected fields' do
     expected_fields = %w[
       id name path full_name full_path description description_html visibility
-      lfs_enabled request_access_enabled projects root_storage_statistics
+      lfs_enabled request_access_enabled storage_size_limit projects root_storage_statistics
     ]
 
     expect(described_class).to have_graphql_fields(*expected_fields)