Fix [#388] guard parameter for permissible states

lib/aasm/instance_base.rb

@@ -33,9 +33,9 @@ def human_state
       AASM::Localizer.new.human_state_name(@instance.class, state_object_for_name(current_state))
     end
 
-    def states(options={})
+    def states(options={}, *args)
       if options.has_key?(:permitted)
-        selected_events = events(:permitted => options[:permitted])
+        selected_events = events({:permitted => options[:permitted]}, *args)
         # An array of arrays. Each inner array represents the transitions that
         # transition from the current state for an event
         event_transitions = selected_events.map {|e| e.transitions_from_state(current_state) }
@@ -45,10 +45,10 @@ def states(options={})
           return nil if transitions.empty?
 
           # Return the :to state of the first transition that is allowed (or not) or nil
-          if options[:permitted] 
-            transition = transitions.find { |t| t.allowed?(@instance) }
+          if options[:permitted]
+            transition = transitions.find { |t| t.allowed?(@instance, *args) }
           else
-            transition = transitions.find { |t| !t.allowed?(@instance) }
+            transition = transitions.find { |t| !t.allowed?(@instance, *args) }
           end
           transition ? transition.to : nil
         end.flatten.compact.uniq
@@ -60,7 +60,7 @@ def states(options={})
       end
     end
 
-    def events(options={})
+    def events(options={}, *args)
       state = options[:state] || current_state
       events = @instance.class.aasm(@name).events.select {|e| e.transitions_from_state?(state) }
 
@@ -71,9 +71,9 @@ def events(options={})
         # filters the results of events_for_current_state so that only those that
         # are really currently possible (given transition guards) are shown.
         if options[:permitted]
-          events.select! { |e| @instance.send("may_#{e.name}?") }
+          events.select! { |e| @instance.send("may_#{e.name}?", *args) }
         else
-          events.select! { |e| !@instance.send("may_#{e.name}?") }
+          events.select! { |e| !@instance.send("may_#{e.name}?", *args) }
         end
       end
 

spec/models/guard_with_params.rb

@@ -0,0 +1,24 @@
+class GuardWithParams
+  include AASM
+  aasm do
+    state :new, :reviewed, :finalized
+
+    event :mark_as_reviewed do
+      transitions :from => :new, :to => :reviewed, :guards => [:user_is_manager?]
+    end
+  end
+
+  def user_is_manager?(user)
+    ok = false
+    if user.has_role? :manager
+      ok = true
+    end
+    return ok
+  end
+end
+
+class GuardParamsClass
+  def has_role?(role)
+    true
+  end
+end

spec/models/guard_with_params_multiple.rb

@@ -0,0 +1,18 @@
+class GuardWithParamsMultiple
+  include AASM
+  aasm(:left) do
+    state :new, :reviewed, :finalized
+
+    event :mark_as_reviewed do
+      transitions :from => :new, :to => :reviewed, :guards => [:user_is_manager?]
+    end
+  end
+
+  def user_is_manager?(user)
+    ok = false
+    if user.has_role? :manager
+      ok = true
+    end
+    return ok
+  end
+end

spec/unit/guard_with_params_multiple_spec.rb

@@ -0,0 +1,10 @@
+require 'spec_helper'
+
+describe "guards with params" do
+  let(:guard) { GuardWithParamsMultiple.new }
+  let(:user) {GuardParamsClass.new}
+
+  it "list permitted states" do
+    expect(guard.aasm(:left).states({:permitted => true}, user).map(&:name)).to eql [:reviewed]
+  end
+end

spec/unit/guard_with_params_spec.rb

@@ -0,0 +1,10 @@
+require 'spec_helper'
+
+describe "guards with params" do
+  let(:guard) { GuardWithParams.new }
+  let(:user) {GuardParamsClass.new}
+
+  it "list permitted states" do
+    expect(guard.aasm.states({:permitted => true}, user).map(&:name)).to eql [:reviewed]
+  end
+end