1 files changed, 49 insertions, 0 deletions
diff --git a/app/services/ide/schemas_config_service.rb b/app/services/ide/schemas_config_service.rb
new file mode 100644
index 00000000000..8d2ce97103d
--- /dev/null
+++ b/app/services/ide/schemas_config_service.rb
@@ -0,0 +1,49 @@
+# frozen_string_literal: true
+
+module Ide
+  class SchemasConfigService < ::Ide::BaseConfigService
+    PREDEFINED_SCHEMAS = [{
+      uri: 'https://json.schemastore.org/gitlab-ci',
+      match: ['*.gitlab-ci.yml']
+    }].freeze
+
+    def execute
+      schema = predefined_schema_for(params[:filename]) || {}
+      success(schema: schema)
+    rescue => e
+      error(e.message)
+    end
+
+    private
+
+    def find_schema(filename, schemas)
+      match_flags = ::File::FNM_DOTMATCH | ::File::FNM_PATHNAME
+
+      schemas.each do |schema|
+        match = schema[:match].any? { |pattern| ::File.fnmatch?(pattern, filename, match_flags) }
+
+        return Gitlab::Json.parse(get_cached(schema[:uri])) if match
+      end
+
+      nil
+    end
+
+    def predefined_schema_for(filename)
+      find_schema(filename, predefined_schemas)
+    end
+
+    def predefined_schemas
+      return PREDEFINED_SCHEMAS if Feature.enabled?(:schema_linting)
+
+      []
+    end
+
+    def get_cached(url)
+      Rails.cache.fetch("services:ide:schema:#{url}", expires_in: 1.day) do
+        Gitlab::HTTP.get(url).body
+      end
+    end
+  end
+end
+
+Ide::SchemasConfigService.prepend_if_ee('::EE::Ide::SchemasConfigService')