6 files changed, 22 insertions, 2 deletions
diff --git a/include/brain/bias_node.h b/include/brain/bias_node.h
index 0b57e15..77c5884 100644
--- a/include/brain/bias_node.h
+++ b/include/brain/bias_node.h
@@ -5,8 +5,8 @@
 class BiasNode: public NeuralNode
 {
 public:
-    BiasNode()
+BiasNode() : NeuralNode("b0")
     {
-	_activation = 1;
+        _activation = 1;
     }
 };
diff --git a/include/brain/neural_link.h b/include/brain/neural_link.h
index b9cf4d1..14f58b9 100644
--- a/include/brain/neural_link.h
+++ b/include/brain/neural_link.h
@@ -7,6 +7,9 @@ class NeuralLink
 public:
     NeuralLink(NeuralNode* input, double weight);
     double weightedActivation() const;
+
+    double weight() const { return _weight; }
+    std::string inputIdentifier() const { return _input->identifier(); }
     
 private:
     NeuralNode* _input;
diff --git a/include/brain/neural_network.h b/include/brain/neural_network.h
index a1af7cc..7fcf5f4 100644
--- a/include/brain/neural_network.h
+++ b/include/brain/neural_network.h
@@ -22,6 +22,9 @@ public:
 
     unsigned int numberOfSensors() const { return _sensors.size(); }
     unsigned int numberOfOutputs() const { return _outputs.size(); }
+    unsigned int numberOfNeurons() const { return _neurons.size(); }
+
+    bool linkExists(std::string srcIdentifier, std::string destIdentifier, double weight) const;
 	
 private:
     std::vector<std::shared_ptr<Sensor>> _sensors;
diff --git a/include/brain/neural_node.h b/include/brain/neural_node.h
index 62b7b15..2684146 100644
--- a/include/brain/neural_node.h
+++ b/include/brain/neural_node.h
@@ -1,9 +1,18 @@
 #pragma once
 
+#include <string>
+
 class NeuralNode
 {
 public:
     double activation() const { return _activation; }
+    std::string identifier() const { return _identifier; }
+
+NeuralNode(std::string identifier): _identifier(identifier) {}
+    
 protected:
     double _activation;
+
+private:
+    std::string _identifier;
 };
diff --git a/include/brain/neuron.h b/include/brain/neuron.h
index 204b303..ca26c73 100644
--- a/include/brain/neuron.h
+++ b/include/brain/neuron.h
@@ -12,6 +12,10 @@ public:
     void addInput(NeuralLink&& link);
     bool calculateActivation();
 
+Neuron(int index) : NeuralNode('n'+std::to_string(index)){};
+
+    bool hasInputWithWeight(std::string srcIdentifier, double weight) const;
+
 private:
     std::vector<NeuralLink> _inputLinks;
     double sigmoid(double input) const;
diff --git a/include/brain/sensor.h b/include/brain/sensor.h
index a780c49..10f62a7 100644
--- a/include/brain/sensor.h
+++ b/include/brain/sensor.h
@@ -5,5 +5,6 @@
 class Sensor: public NeuralNode
 {
 public:
+Sensor(int index) :NeuralNode('s'+std::to_string(index)){}
     void setActivation(double activation) { _activation = activation; }
 };