Moved UnitTests to tests/ and Skills to src/

src/TrueSkill/Layers/PlayerPriorValuesToSkillsLayer.php

@@ -0,0 +1,87 @@
+<?php
+namespace Moserware\Skills\TrueSkill\Layers;
+
+require_once(dirname(__FILE__) . "/../../Rating.php");
+require_once(dirname(__FILE__) . "/../../FactorGraphs/Schedule.php");
+require_once(dirname(__FILE__) . "/../../FactorGraphs/Variable.php");
+require_once(dirname(__FILE__) . "/../../Numerics/BasicMath.php");
+require_once(dirname(__FILE__) . "/../TrueSkillFactorGraph.php");
+require_once(dirname(__FILE__) . "/../Factors/GaussianPriorFactor.php");
+require_once(dirname(__FILE__) . "/TrueSkillFactorGraphLayer.php");
+
+use Moserware\Skills\Rating;
+use Moserware\Skills\FactorGraphs\ScheduleLoop;
+use Moserware\Skills\FactorGraphs\ScheduleSequence;
+use Moserware\Skills\FactorGraphs\ScheduleStep;
+use Moserware\Skills\FactorGraphs\Variable;
+use Moserware\Numerics\GaussianDistribution;
+use Moserware\Skills\TrueSkill\TrueSkillFactorGraph;
+use Moserware\Skills\TrueSkill\Factors\GaussianPriorFactor;
+
+// We intentionally have no Posterior schedule since the only purpose here is to
+// start the process.
+class PlayerPriorValuesToSkillsLayer extends TrueSkillFactorGraphLayer
+{
+    private $_teams;
+
+    public function __construct(TrueSkillFactorGraph &$parentGraph, array &$teams)
+    {
+        parent::__construct($parentGraph);
+        $this->_teams = $teams;
+    }
+
+    public function buildLayer()
+    {
+        $teams = &$this->_teams;
+        foreach ($teams as &$currentTeam)
+        {
+            $localCurrentTeam = &$currentTeam;
+            $currentTeamSkills = array();
+
+            $currentTeamAllPlayers = $localCurrentTeam->getAllPlayers();
+            foreach ($currentTeamAllPlayers as &$currentTeamPlayer)
+            {
+                $localCurrentTeamPlayer = &$currentTeamPlayer;
+                $currentTeamPlayerRating = $currentTeam->getRating($localCurrentTeamPlayer);
+                $playerSkill = &$this->createSkillOutputVariable($localCurrentTeamPlayer);
+                $priorFactor = &$this->createPriorFactor($localCurrentTeamPlayer, $currentTeamPlayerRating, $playerSkill);
+                $this->addLayerFactor($priorFactor);
+                $currentTeamSkills[] = $playerSkill;
+            }
+
+            $outputVariablesGroups = &$this->getOutputVariablesGroups();
+            $outputVariablesGroups[] = $currentTeamSkills;
+        }
+    }
+
+    public function createPriorSchedule()
+    {
+        $localFactors = &$this->getLocalFactors();
+        return $this->scheduleSequence(
+                array_map(
+                        function(&$prior)
+                        {
+                            return new ScheduleStep("Prior to Skill Step", $prior, 0);
+                        },
+                        $localFactors),
+                 "All priors");
+    }
+
+    private function createPriorFactor(&$player, Rating &$priorRating, Variable &$skillsVariable)
+    {
+        return new GaussianPriorFactor($priorRating->getMean(),
+                                       square($priorRating->getStandardDeviation()) +
+                                       square($this->getParentFactorGraph()->getGameInfo()->getDynamicsFactor()),
+                                       $skillsVariable);
+    }
+
+    private function &createSkillOutputVariable(&$key)
+    {
+        $parentFactorGraph = &$this->getParentFactorGraph();
+        $variableFactory = &$parentFactorGraph->getVariableFactory();
+        $skillOutputVariable = &$variableFactory->createKeyedVariable($key, $key . "'s skill");
+        return $skillOutputVariable;
+    }
+}
+
+?>