1 files changed, 80 insertions, 0 deletions
diff --git a/lib/gitlab_settings/options.rb b/lib/gitlab_settings/options.rb
new file mode 100644
index 00000000000..b5f86a814e2
--- /dev/null
+++ b/lib/gitlab_settings/options.rb
@@ -0,0 +1,80 @@
+# frozen_string_literal: true
+
+module GitlabSettings
+  class Options
+    # Recursively build GitlabSettings::Options
+    def self.build(obj)
+      case obj
+      when Hash
+        new(obj.transform_values { |value| build(value) })
+      when Array
+        obj.map { |value| build(value) }
+      else
+        obj
+      end
+    end
+
+    def initialize(value)
+      @options = value.deep_stringify_keys
+    end
+
+    def [](key)
+      @options[key.to_s]
+    end
+
+    def []=(key, value)
+      @options[key.to_s] = Options.build(value)
+    end
+
+    def key?(name)
+      @options.key?(name.to_s) || @options.key?(name.to_sym)
+    end
+    alias_method :has_key?, :key?
+
+    def to_hash
+      @options.deep_transform_values do |option|
+        case option
+        when GitlabSettings::Options
+          option.to_hash
+        else
+          option
+        end
+      end
+    end
+    alias_method :to_h, :to_hash
+
+    def merge(other)
+      Options.build(to_hash.merge(other.deep_stringify_keys))
+    end
+
+    def deep_merge(other)
+      Options.build(to_hash.deep_merge(other.deep_stringify_keys))
+    end
+
+    def is_a?(klass)
+      return true if klass == Hash
+
+      super(klass)
+    end
+
+    def method_missing(name, *args, &block)
+      name_string = +name.to_s
+
+      if name_string.chomp!("=")
+        return self[name_string] = args.first if key?(name_string)
+      elsif key?(name_string)
+        return self[name_string]
+      end
+
+      return @options.public_send(name, *args, &block) if @options.respond_to?(name) # rubocop: disable GitlabSecurity/PublicSend
+
+      raise ::GitlabSettings::MissingSetting, "option '#{name}' not defined"
+    end
+
+    def respond_to_missing?(name, include_all = false)
+      return true if key?(name)
+
+      @options.respond_to?(name, include_all)
+    end
+  end
+end