91 lines
2.6 KiB
PHP
91 lines
2.6 KiB
PHP
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<?php
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namespace neuralnetwork\core;
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use neuralnetwork\core\NeuralNetworkCore;
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/************************************************
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**** Neural Network's Facade ****
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************************************************/
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class NeuralNetwork{
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/* CHECKS AND STORES PATHS TO STORAGE FILES
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*
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* @path<String> Path to storage
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*
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* @return files<Array> Array containing storage files' information
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* @return error<NULL> Returns NULL if error
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*
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*/
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public static function setStorage($path){
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/* (1) Checks the path */
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if( !preg_match("/^(?P<path>\/(?:[a-z0-9_-]+\/)*)(?P<filename>[a-z0-9_-]+)$/i", $path, $matches) )
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return null;
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/* (2) Checks file's existence and returns it */
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return [
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[
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'filename' => $matches['path'].$matches['filename'] .'.nn', // will contain neural network data
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'exists' => is_file($matches['path'].$matches['filename'] .'.nn')
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],
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[
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'filename' => $matches['path'].$matches['filename'] .'.ex', // will contain samples
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'exists' => is_file($matches['path'].$matches['filename'] .'.ex')
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]
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];
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}
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/* CREATES A NEW NEURAL NETWORK
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*
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* @generations<int> Maximum number of generations to process
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* @genomes<int> Number of genomes per generation
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*
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* @return nn<NeuralNetwork> New NeuralNetwork
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*
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*/
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public static function create($generations=null, $genomes=null){
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/* Propagate instance creation */
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return new NeuralNetworkCore($generations, $genomes);
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}
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/* LOADS A NEURAL NETWORK FROM STORAGE
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*
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* @storage<String> Path to storage
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*
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* @return nn<NeuralNetwork> Loaded NeuralNetwork
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*
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*/
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public static function load($storage=null){
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/* (1) Checks argument */
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if( is_null($storage=self::setStorage($gnr_or_storage)) )
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throw new Error('Wrong NeuralNetwork loader\'s argument.');
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/* (2) If files doesn't exist, raise error */
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if( !$storage[0]['exists'] || !$storage[1]['exists'] )
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throw new Error('Loaded storage have file(s) missing.');
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/* (3) Parses files */
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$last_network = json_decode( FileManager::read($storage[0]['filename']), true);
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/* (4) Creates and fill instance */
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$instance = new NeuralNetworkCore($last_network['generations'], $last_network['genomes']);
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$instance->setStorage($gnr_or_storage);
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$instance->setFitnessEnd($last_network['fitness_end']);
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$instance->setKeptGenomes($last_network['kept_genomes']);
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$instance->setMutationThreshold($last_network['mutation_threshold']);
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$instance->setMaxValues($last_network['max_values']);
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/* (5) Returns instance */
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return $instance;
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}
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}
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?>
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