1 files changed, 45 insertions, 0 deletions
diff --git a/lib/declarative_policy/rule_dsl.rb b/lib/declarative_policy/rule_dsl.rb
new file mode 100644
index 00000000000..e948b7f2de1
--- /dev/null
+++ b/lib/declarative_policy/rule_dsl.rb
@@ -0,0 +1,45 @@
+module DeclarativePolicy
+  # The DSL evaluation context inside rule { ... } blocks.
+  # Responsible for creating and combining Rule objects.
+  #
+  # See Base.rule
+  class RuleDsl
+    def initialize(context_class)
+      @context_class = context_class
+    end
+
+    def can?(ability)
+      Rule::Ability.new(ability)
+    end
+
+    def all?(*rules)
+      Rule::And.make(rules)
+    end
+
+    def any?(*rules)
+      Rule::Or.make(rules)
+    end
+
+    def none?(*rules)
+      ~Rule::Or.new(rules)
+    end
+
+    def cond(condition)
+      Rule::Condition.new(condition)
+    end
+
+    def delegate(delegate_name, condition)
+      Rule::DelegatedCondition.new(delegate_name, condition)
+    end
+
+    def method_missing(m, *a, &b)
+      return super unless a.empty? && !block_given?
+
+      if @context_class.delegations.key?(m)
+        DelegateDsl.new(self, m)
+      else
+        cond(m.to_sym)
+      end
+    end
+  end
+end