From 810771a1c550ba765baef6ee0b7065a67f32e749 Mon Sep 17 00:00:00 2001
From: Syphax Bouazzouni <gs_bouazzouni@esi.dz>
Date: Tue, 28 Feb 2023 06:24:26 +0100
Subject: [PATCH] implement symmetric validator

---
 lib/goo/validators/enforce.rb                 |  2 +
 .../validators/implementations/existence.rb   |  5 ++-
 .../validators/implementations/symmetric.rb   | 44 +++++++++++++++++++
 3 files changed, 50 insertions(+), 1 deletion(-)
 create mode 100644 lib/goo/validators/implementations/symmetric.rb

diff --git a/lib/goo/validators/enforce.rb b/lib/goo/validators/enforce.rb
index 9283c070..70953645 100644
--- a/lib/goo/validators/enforce.rb
+++ b/lib/goo/validators/enforce.rb
@@ -39,6 +39,8 @@ def enforce(inst,attr,value)
               check Goo::Validators::DataType, inst, attr, value, opt, DateTime
             when :float, Float
               check Goo::Validators::DataType, inst, attr, value, opt, Float
+            when :symmetric
+              check Goo::Validators::Symmetric, inst, attr, value, opt
             when Proc
               call_proc(opt, inst, attr)
             when /^max_/, /^min_/
diff --git a/lib/goo/validators/implementations/existence.rb b/lib/goo/validators/implementations/existence.rb
index a551f35d..6e759154 100644
--- a/lib/goo/validators/implementations/existence.rb
+++ b/lib/goo/validators/implementations/existence.rb
@@ -8,9 +8,12 @@ class Existence < ValidatorBase
       error_message ->(obj) { "`#{@value}` value cannot be nil"}
 
       validity_check -> (obj) do
-        not (@value.nil? || self.class.empty?(@value) || self.class.empty_array?(@value))
+        not self.class.empty_value?(@value)
       end
 
+      def self.empty_value?(value)
+        value.nil? || self.empty?(value) || self.empty_array?(value)
+      end
       def self.empty?(value)
         empty_string?(value) || empty_to_s?(value)
       end
diff --git a/lib/goo/validators/implementations/symmetric.rb b/lib/goo/validators/implementations/symmetric.rb
new file mode 100644
index 00000000..c1c9055c
--- /dev/null
+++ b/lib/goo/validators/implementations/symmetric.rb
@@ -0,0 +1,44 @@
+module Goo
+  module Validators
+    class Symmetric < ValidatorBase
+      include Validator
+
+      key :symmetric
+
+      error_message ->(obj) {
+        "symmetric error"
+      }
+
+      validity_check -> (obj) do
+        return true if Existence.empty_value?(@value)
+
+        return Array(@value).select{|x| not self.class.symmetric?(@attr,x, @inst)}.empty?
+      end
+
+      def self.symmetric?(attr, value, source_object)
+        if self.respond_to?(attr, value)
+          target_values = self.attr_value(attr, value)
+          return target_values.any?{ |target_object| self.equivalent?(target_object, source_object)}
+        end
+
+        return false
+      end
+
+      def self.respond_to?(attr, object)
+        object && object.respond_to?(attr)
+      end
+
+      def self.attr_value(attr, object)
+        Array(object.send(attr))
+      end
+
+      def self.equivalent?(object1, object2)
+        if object1.respond_to?(:id) && object2.respond_to?(:id)
+          object1.id.eql?(object2.id)
+        else
+          object2 == object1
+        end
+      end
+    end
+  end
+end
\ No newline at end of file