DEV: Validate objects when updating typed objects theme settings (#25902)

Why this change?

This change ensures that we validate the value of the new objects
when updating typed objects theme settings.

lib/theme_settings_manager/objects.rb

@@ -6,7 +6,7 @@ class ThemeSettingsManager::Objects < ThemeSettingsManager
   end
 
   def value=(objects)
-    # TODO: Validate the objects against the schema
+    ensure_is_valid_value!(objects)
 
     record = has_record? ? db_record : create_record!
     record.json_value = objects

lib/theme_settings_object_validator.rb

@@ -61,7 +61,7 @@ class ThemeSettingsObjectValidator
   end
 
   def initialize(schema:, object:, json_pointer_prefix: "", errors: {}, valid_ids_lookup: {})
-    @object = object
+    @object = object.with_indifferent_access
     @schema_name = schema[:name]
     @properties = schema[:properties]
     @errors = errors

spec/fixtures/theme_settings/objects_settings.yaml

@@ -0,0 +1,33 @@
+objects_setting:
+  type: objects
+  default:
+    - name: "section 1"
+      links:
+        - name: "link 1"
+          url: "http://example.com"
+        - name: "link 2"
+          url: "http://example.com"
+    - name: "section 2"
+      links:
+        - name: "link 3"
+          url: "http://example.com"
+        - name: "link 4"
+          url: "http://example.com"
+  schema:
+    name: sections
+    properties:
+      name:
+        type: string
+        required: true
+      links:
+        type: objects
+        schema:
+          name: link
+          properties:
+            name:
+              type: string
+              required: true
+              validations:
+                max_length: 20
+            url:
+              type: string

spec/lib/theme_settings_manager/objects_spec.rb

@@ -3,35 +3,51 @@
 RSpec.describe ThemeSettingsManager::Objects do
   fab!(:theme)
 
+  let(:objects_setting) do
+    yaml = File.read("#{Rails.root}/spec/fixtures/theme_settings/objects_settings.yaml")
+    field = theme.set_field(target: :settings, name: "yaml", value: yaml)
+    theme.save!
+    theme.settings[:objects_setting]
+  end
+
   before { SiteSetting.experimental_objects_type_for_theme_settings = true }
 
   it "can store a list of objects" do
-    objects_setting =
-      described_class.new(
-        "some_objects_setting",
-        [{ "title" => "Some title", "description" => "Some description" }],
-        theme,
-        schema: {
-          name: "Some Object",
-          fields: {
-            title: {
-              type: "string",
-            },
-            description: {
-              type: "string",
-            },
+    new_value = [
+      {
+        "name" => "section 3",
+        "links" => [
+          { "name" => "section 3 link 1", "url" => "https://section3link1.com" },
+          { "name" => "section 3 link 2" },
+        ],
+      },
+      {
+        "name" => "section 4",
+        "links" => [{ "name" => "section 4 link 1", "url" => "https://section4link1.com" }],
+      },
+    ]
+
+    objects_setting.value = new_value
+
+    expect(theme.reload.settings[:objects_setting].value).to eq(new_value)
+  end
+
+  it "raises the right error when there are objects which are not valid" do
+    new_value = [
+      { "name" => "section 3", "links" => [{ "url" => "https://some.url.no.name" }] },
+      {
+        "links" => [
+          {
+            "name" => "some name that exceeds the max length of 20 characters",
+            "url" => "https://some.url",
           },
-        },
-      )
+        ],
+      },
+    ]
 
-    expect(objects_setting.value).to eq(
-      [{ "title" => "Some title", "description" => "Some description" }],
-    )
-
-    objects_setting.value = [{ title: "title 1", description: "description 1" }]
-
-    expect(objects_setting.value).to eq(
-      [{ "title" => "title 1", "description" => "description 1" }],
+    expect { objects_setting.value = new_value }.to raise_error(
+      Discourse::InvalidParameters,
+      "The property at JSON Pointer '/0/links/0/name' must be present. The property at JSON Pointer '/1/name' must be present. The property at JSON Pointer '/1/links/0/name' must be at most 20 characters long.",
     )
   end
 end