jon48 / webtrees-lib

src/Webtrees/Module/Sosa/SosaStatsController.php

Indentation +180 added lines, -180 removed lines

@@ -25,218 +25,218 @@
  */
 class SosaStatsController extends MvcController
 {
-    /**
-     * Sosa Provider for the controller
-     * @var SosaProvider $sosa_provider
-     */
-    protected $sosa_provider;
+	/**
+	 * Sosa Provider for the controller
+	 * @var SosaProvider $sosa_provider
+	 */
+	protected $sosa_provider;
     
-    /**
-     * Constructor for SosaStatsController
-     * @param AbstractModule $module
-     */
-    public function __construct(AbstractModule $module) {
-        global $WT_TREE;
+	/**
+	 * Constructor for SosaStatsController
+	 * @param AbstractModule $module
+	 */
+	public function __construct(AbstractModule $module) {
+		global $WT_TREE;
         
-        parent::__construct($module);
+		parent::__construct($module);
         
-        $this->sosa_provider = new SosaProvider($WT_TREE, Auth::user());
-    }
+		$this->sosa_provider = new SosaProvider($WT_TREE, Auth::user());
+	}
     
-    /**
-     * Pages
-     */
+	/**
+	 * Pages
+	 */
     
-    /**
-     * SosaStats@index
-     */
-    public function index() {
-        global $WT_TREE;
+	/**
+	 * SosaStats@index
+	 */
+	public function index() {
+		global $WT_TREE;
         
-        $controller = new PageController();
-        $controller
-            ->setPageTitle(I18N::translate('Sosa Statistics'))
-            ->addInlineJavascript('$(".help_tooltip").tooltip();')
-        ;
+		$controller = new PageController();
+		$controller
+			->setPageTitle(I18N::translate('Sosa Statistics'))
+			->addInlineJavascript('$(".help_tooltip").tooltip();')
+		;
 
-        $view_bag = new ViewBag();
-        $view_bag->set('title', $controller->getPageTitle());
-        $view_bag->set('is_setup', false);
+		$view_bag = new ViewBag();
+		$view_bag->set('title', $controller->getPageTitle());
+		$view_bag->set('is_setup', false);
         
-        if($this->sosa_provider->isSetup()) {
-            $view_bag->set('is_setup', true);
+		if($this->sosa_provider->isSetup()) {
+			$view_bag->set('is_setup', true);
             
-            $view_bag->set('root_indi', $this->sosa_provider->getRootIndi());
+			$view_bag->set('root_indi', $this->sosa_provider->getRootIndi());
             
-            $sosaCount = $this->sosa_provider->getSosaCount();
-            $diffSosaCount = $this->sosa_provider->getDifferentSosaCount();
+			$sosaCount = $this->sosa_provider->getSosaCount();
+			$diffSosaCount = $this->sosa_provider->getDifferentSosaCount();
             
-            $general_stats = array(
-                'sosa_count' => $sosaCount,
-                'distinct_count' => $diffSosaCount,
-                'sosa_rate' => Functions::safeDivision($diffSosaCount, $this->sosa_provider->getTotalIndividuals()),
-                'pedi_collapse' => 1 - Functions::safeDivision($diffSosaCount, $sosaCount),
-                'mean_gen_time' => $this->sosa_provider->getMeanGenerationTime()
-            );
-            $view_bag->set('general_stats', $general_stats);
+			$general_stats = array(
+				'sosa_count' => $sosaCount,
+				'distinct_count' => $diffSosaCount,
+				'sosa_rate' => Functions::safeDivision($diffSosaCount, $this->sosa_provider->getTotalIndividuals()),
+				'pedi_collapse' => 1 - Functions::safeDivision($diffSosaCount, $sosaCount),
+				'mean_gen_time' => $this->sosa_provider->getMeanGenerationTime()
+			);
+			$view_bag->set('general_stats', $general_stats);
             
-            $stats_gen = $this->sosa_provider->getStatisticsByGeneration();
-            $view_bag->set('missinganc_url', 'module.php?mod='.$this->module->getName().'&mod_action=SosaList@missing&ged='.$WT_TREE->getNameUrl().'&gen=');
-            $view_bag->set('sosaanc_url', 'module.php?mod='.$this->module->getName().'&mod_action=SosaList&ged='.$WT_TREE->getNameUrl().'&gen=');
+			$stats_gen = $this->sosa_provider->getStatisticsByGeneration();
+			$view_bag->set('missinganc_url', 'module.php?mod='.$this->module->getName().'&mod_action=SosaList@missing&ged='.$WT_TREE->getNameUrl().'&gen=');
+			$view_bag->set('sosaanc_url', 'module.php?mod='.$this->module->getName().'&mod_action=SosaList&ged='.$WT_TREE->getNameUrl().'&gen=');
             
-            $gen_theoretical=1;
-            $total_theoretical=0;
-            $prev_diff=0;
-            $prev_known=0.5;
-            $gen_equiv=0;            
-            $generation_stats = array();
+			$gen_theoretical=1;
+			$total_theoretical=0;
+			$prev_diff=0;
+			$prev_known=0.5;
+			$gen_equiv=0;            
+			$generation_stats = array();
             
-            foreach($stats_gen as $gen => $tab){
-                $genY1= I18N::translate('-');
-                $genY2= I18N::translate('-');
-                if($tab['firstBirth']>0) $genY1=$tab['firstBirth'];
-                if($tab['lastBirth']>0) $genY2=$tab['lastBirth'];
-                $total_theoretical += $gen_theoretical;
-                $perc_sosa_count_theor = Functions::safeDivision($tab['sosaCount'], $gen_theoretical);
-                $gen_equiv += $perc_sosa_count_theor;
-                $missing=2*$prev_known - $tab['sosaCount'];
-                $gen_diff=$tab['diffSosaTotalCount']-$prev_diff;
+			foreach($stats_gen as $gen => $tab){
+				$genY1= I18N::translate('-');
+				$genY2= I18N::translate('-');
+				if($tab['firstBirth']>0) $genY1=$tab['firstBirth'];
+				if($tab['lastBirth']>0) $genY2=$tab['lastBirth'];
+				$total_theoretical += $gen_theoretical;
+				$perc_sosa_count_theor = Functions::safeDivision($tab['sosaCount'], $gen_theoretical);
+				$gen_equiv += $perc_sosa_count_theor;
+				$missing=2*$prev_known - $tab['sosaCount'];
+				$gen_diff=$tab['diffSosaTotalCount']-$prev_diff;
                 
-                $generation_stats[$gen] = array(
-                    'gen_min_birth' => $genY1,
-                    'gen_max_birth' => $genY2,
-                    'theoretical' => $gen_theoretical,
-                    'known' => $tab['sosaCount'],
-                    'perc_known' => $perc_sosa_count_theor,
-                    'missing' => $missing,
-                    'perc_missing' => 1-Functions::safeDivision($tab['sosaCount'], 2*$prev_known),
-                    'total_known' => $tab['sosaTotalCount'],
-                    'perc_total_known' => Functions::safeDivision($tab['sosaTotalCount'], $total_theoretical),
-                    'different' => $gen_diff,
-                    'perc_different' => Functions::safeDivision($gen_diff, $tab['sosaCount']),
-                    'total_different' => $tab['diffSosaTotalCount'],
-                    'pedi_collapse' => 1 - Functions::safeDivision($tab['diffSosaTotalCount'], $tab['sosaTotalCount'])
-                );
+				$generation_stats[$gen] = array(
+					'gen_min_birth' => $genY1,
+					'gen_max_birth' => $genY2,
+					'theoretical' => $gen_theoretical,
+					'known' => $tab['sosaCount'],
+					'perc_known' => $perc_sosa_count_theor,
+					'missing' => $missing,
+					'perc_missing' => 1-Functions::safeDivision($tab['sosaCount'], 2*$prev_known),
+					'total_known' => $tab['sosaTotalCount'],
+					'perc_total_known' => Functions::safeDivision($tab['sosaTotalCount'], $total_theoretical),
+					'different' => $gen_diff,
+					'perc_different' => Functions::safeDivision($gen_diff, $tab['sosaCount']),
+					'total_different' => $tab['diffSosaTotalCount'],
+					'pedi_collapse' => 1 - Functions::safeDivision($tab['diffSosaTotalCount'], $tab['sosaTotalCount'])
+				);
                 
-                $gen_theoretical = $gen_theoretical * 2;
-                $prev_known=$tab['sosaCount'];
-                $prev_diff=$tab['diffSosaTotalCount'];
-            }
+				$gen_theoretical = $gen_theoretical * 2;
+				$prev_known=$tab['sosaCount'];
+				$prev_diff=$tab['diffSosaTotalCount'];
+			}
             
-            $view_bag->set('generation_stats', $generation_stats);
-            $view_bag->set('equivalent_gen', $gen_equiv);
+			$view_bag->set('generation_stats', $generation_stats);
+			$view_bag->set('equivalent_gen', $gen_equiv);
                         
-            $view_bag->set('chart_img_g2', $this->htmlAncestorDispersionG2());
-            $view_bag->set('chart_img_g3', $this->htmlAncestorDispersionG3());
+			$view_bag->set('chart_img_g2', $this->htmlAncestorDispersionG2());
+			$view_bag->set('chart_img_g3', $this->htmlAncestorDispersionG3());
             
-        }
+		}
         
-        ViewFactory::make('SosaStats', $this, $controller, $view_bag)->render();   
-    }
+		ViewFactory::make('SosaStats', $this, $controller, $view_bag)->render();   
+	}
     
-    /**
-     * Returns HTML code for a graph showing the dispersion of ancestors across father & mother
-     * @return string HTML code
-     */
-     private function htmlAncestorDispersionG2()
-    {
-        $ancestorsDispGen2 = $this->sosa_provider->getAncestorDispersionForGen(2);
-        if(count($ancestorsDispGen2) == 0) return;
+	/**
+	 * Returns HTML code for a graph showing the dispersion of ancestors across father & mother
+	 * @return string HTML code
+	 */
+	 private function htmlAncestorDispersionG2()
+	{
+		$ancestorsDispGen2 = $this->sosa_provider->getAncestorDispersionForGen(2);
+		if(count($ancestorsDispGen2) == 0) return;
         
-        $size = '600x300';
+		$size = '600x300';
         
-        $total = array_sum($ancestorsDispGen2);
-        $father_count = array_key_exists(1, $ancestorsDispGen2) ? $ancestorsDispGen2[1] : 0;
-        $father = array (
-            'color' => '84beff', 
-            'count' => $father_count, 
-            'perc' => Functions::safeDivision($father_count, $total), 
-            'name' => \Fisharebest\Webtrees\Functions\Functions::getRelationshipNameFromPath('fat')            
-        );
-        $mother_count = array_key_exists(2, $ancestorsDispGen2) ? $ancestorsDispGen2[2] : 0;
-        $mother = array (
-            'color' => 'ffd1dc', 
-            'count' => $mother_count, 
-            'perc' => Functions::safeDivision($mother_count, $total),
-            'name' => \Fisharebest\Webtrees\Functions\Functions::getRelationshipNameFromPath('mot')
-        );
-        $shared_count = array_key_exists(-1, $ancestorsDispGen2) ? $ancestorsDispGen2[-1] : 0;
-        $shared = array (
-            'color' => '777777', 
-            'count' => $shared_count, 
-            'perc' => Functions::safeDivision($shared_count, $total),
-            'name' => I18N::translate('Shared')
-        );
+		$total = array_sum($ancestorsDispGen2);
+		$father_count = array_key_exists(1, $ancestorsDispGen2) ? $ancestorsDispGen2[1] : 0;
+		$father = array (
+			'color' => '84beff', 
+			'count' => $father_count, 
+			'perc' => Functions::safeDivision($father_count, $total), 
+			'name' => \Fisharebest\Webtrees\Functions\Functions::getRelationshipNameFromPath('fat')            
+		);
+		$mother_count = array_key_exists(2, $ancestorsDispGen2) ? $ancestorsDispGen2[2] : 0;
+		$mother = array (
+			'color' => 'ffd1dc', 
+			'count' => $mother_count, 
+			'perc' => Functions::safeDivision($mother_count, $total),
+			'name' => \Fisharebest\Webtrees\Functions\Functions::getRelationshipNameFromPath('mot')
+		);
+		$shared_count = array_key_exists(-1, $ancestorsDispGen2) ? $ancestorsDispGen2[-1] : 0;
+		$shared = array (
+			'color' => '777777', 
+			'count' => $shared_count, 
+			'perc' => Functions::safeDivision($shared_count, $total),
+			'name' => I18N::translate('Shared')
+		);
         
-        $chd = $this->arrayToExtendedEncoding(array(4095 * $father['perc'], 4095 * $shared['perc'], 4095 * $mother['perc']));
-        $chart_title = I18N::translate('Known Sosa ancestors\' dispersion');
-        $chl = 
-             $father['name'] . ' - ' . I18N::percentage($father['perc'], 1) . '|' .
-             $shared['name'] . ' - ' . I18N::percentage($shared['perc'], 1) . '|' .
-             $mother['name'] . ' - ' . I18N::percentage($mother['perc'], 1);
-        return "<img src=\"https://chart.googleapis.com/chart?cht=p&chp=1.5708&amp;chd=e:{$chd}&amp;chs={$size}&amp;chco={$father['color']},{$shared['color']},{$mother['color']}&amp;chf=bg,s,ffffff00&amp;chl={$chl}\" alt=\"" . $chart_title . "\" title=\"" . $chart_title . "\" />";
-    }
+		$chd = $this->arrayToExtendedEncoding(array(4095 * $father['perc'], 4095 * $shared['perc'], 4095 * $mother['perc']));
+		$chart_title = I18N::translate('Known Sosa ancestors\' dispersion');
+		$chl = 
+			 $father['name'] . ' - ' . I18N::percentage($father['perc'], 1) . '|' .
+			 $shared['name'] . ' - ' . I18N::percentage($shared['perc'], 1) . '|' .
+			 $mother['name'] . ' - ' . I18N::percentage($mother['perc'], 1);
+		return "<img src=\"https://chart.googleapis.com/chart?cht=p&chp=1.5708&amp;chd=e:{$chd}&amp;chs={$size}&amp;chco={$father['color']},{$shared['color']},{$mother['color']}&amp;chf=bg,s,ffffff00&amp;chl={$chl}\" alt=\"" . $chart_title . "\" title=\"" . $chart_title . "\" />";
+	}
     
-    /**
-     * Returns HTML code for a graph showing the dispersion of ancestors across grand-parents
-     * @return string HTML code
-     */
-    private function htmlAncestorDispersionG3()
-    {
-        $ancestorsDispGen2 = $this->sosa_provider->getAncestorDispersionForGen(3);
+	/**
+	 * Returns HTML code for a graph showing the dispersion of ancestors across grand-parents
+	 * @return string HTML code
+	 */
+	private function htmlAncestorDispersionG3()
+	{
+		$ancestorsDispGen2 = $this->sosa_provider->getAncestorDispersionForGen(3);
         
-        $size = '700x300';
+		$size = '700x300';
         
-        $color_motmot = 'ffd1dc';
-        $color_motfat = 'b998a0';
-        $color_fatfat = '577292';
-        $color_fatmot = '84beff';
-        $color_shared = '777777';
+		$color_motmot = 'ffd1dc';
+		$color_motfat = 'b998a0';
+		$color_fatfat = '577292';
+		$color_fatmot = '84beff';
+		$color_shared = '777777';
     
-        $total_fatfat = array_key_exists(1, $ancestorsDispGen2) ? $ancestorsDispGen2[1] : 0;
-        $total_fatmot = array_key_exists(2, $ancestorsDispGen2) ? $ancestorsDispGen2[2] : 0;
-        $total_motfat = array_key_exists(4, $ancestorsDispGen2) ? $ancestorsDispGen2[4] : 0;
-        $total_motmot = array_key_exists(8, $ancestorsDispGen2) ? $ancestorsDispGen2[8] : 0;
-        $total_sha = array_key_exists(-1, $ancestorsDispGen2) ? $ancestorsDispGen2[-1] : 0;
-        $total = $total_fatfat + $total_fatmot + $total_motfat+ $total_motmot + $total_sha;
+		$total_fatfat = array_key_exists(1, $ancestorsDispGen2) ? $ancestorsDispGen2[1] : 0;
+		$total_fatmot = array_key_exists(2, $ancestorsDispGen2) ? $ancestorsDispGen2[2] : 0;
+		$total_motfat = array_key_exists(4, $ancestorsDispGen2) ? $ancestorsDispGen2[4] : 0;
+		$total_motmot = array_key_exists(8, $ancestorsDispGen2) ? $ancestorsDispGen2[8] : 0;
+		$total_sha = array_key_exists(-1, $ancestorsDispGen2) ? $ancestorsDispGen2[-1] : 0;
+		$total = $total_fatfat + $total_fatmot + $total_motfat+ $total_motmot + $total_sha;
     
-        $chd = $this->arrayToExtendedEncoding(array(
-            4095 * $total_fatfat / $total, 
-            4095 * $total_fatmot / $total,
-            4095 * $total_sha / $total, 
-            4095 * $total_motfat / $total,
-            4095 * $total_motmot / $total            
-        ));
-        $chart_title = I18N::translate('Known Sosa ancestors\' dispersion - G3');
-        $chl =
-            \Fisharebest\Webtrees\Functions\Functions::getRelationshipNameFromPath('fatfat') . ' - ' . I18N::percentage(Functions::safeDivision($total_fatfat, $total), 1) . '|' .
-            \Fisharebest\Webtrees\Functions\Functions::getRelationshipNameFromPath('fatmot') . ' - ' . I18N::percentage(Functions::safeDivision($total_fatmot, $total), 1) . '|' .
-            I18N::translate('Shared') . ' - ' . I18N::percentage(Functions::safeDivision($total_sha, $total), 1) . '|' .
-            \Fisharebest\Webtrees\Functions\Functions::getRelationshipNameFromPath('motfat') . ' - ' . I18N::percentage(Functions::safeDivision($total_motfat, $total), 1) . '|' .
-            \Fisharebest\Webtrees\Functions\Functions::getRelationshipNameFromPath('motmot') . ' - ' . I18N::percentage(Functions::safeDivision($total_motmot, $total), 1);
-         return "<img src=\"https://chart.googleapis.com/chart?cht=p&chp=1.5708&amp;chd=e:{$chd}&amp;chs={$size}&amp;chco={$color_fatfat},{$color_fatmot},{$color_shared},{$color_motfat},{$color_motmot}&amp;chf=bg,s,ffffff00&amp;chl={$chl}\" alt=\"" . $chart_title . "\" title=\"" . $chart_title . "\" />";
-    }
+		$chd = $this->arrayToExtendedEncoding(array(
+			4095 * $total_fatfat / $total, 
+			4095 * $total_fatmot / $total,
+			4095 * $total_sha / $total, 
+			4095 * $total_motfat / $total,
+			4095 * $total_motmot / $total            
+		));
+		$chart_title = I18N::translate('Known Sosa ancestors\' dispersion - G3');
+		$chl =
+			\Fisharebest\Webtrees\Functions\Functions::getRelationshipNameFromPath('fatfat') . ' - ' . I18N::percentage(Functions::safeDivision($total_fatfat, $total), 1) . '|' .
+			\Fisharebest\Webtrees\Functions\Functions::getRelationshipNameFromPath('fatmot') . ' - ' . I18N::percentage(Functions::safeDivision($total_fatmot, $total), 1) . '|' .
+			I18N::translate('Shared') . ' - ' . I18N::percentage(Functions::safeDivision($total_sha, $total), 1) . '|' .
+			\Fisharebest\Webtrees\Functions\Functions::getRelationshipNameFromPath('motfat') . ' - ' . I18N::percentage(Functions::safeDivision($total_motfat, $total), 1) . '|' .
+			\Fisharebest\Webtrees\Functions\Functions::getRelationshipNameFromPath('motmot') . ' - ' . I18N::percentage(Functions::safeDivision($total_motmot, $total), 1);
+		 return "<img src=\"https://chart.googleapis.com/chart?cht=p&chp=1.5708&amp;chd=e:{$chd}&amp;chs={$size}&amp;chco={$color_fatfat},{$color_fatmot},{$color_shared},{$color_motfat},{$color_motmot}&amp;chf=bg,s,ffffff00&amp;chl={$chl}\" alt=\"" . $chart_title . "\" title=\"" . $chart_title . "\" />";
+	}
 
-    /**
-     * Convert an array to Google Chart encoding
-     * @param arrat $a Array to encode
-     * @return string
-     */
-    private function arrayToExtendedEncoding($a) {
-        $xencoding = WT_GOOGLE_CHART_ENCODING;
+	/**
+	 * Convert an array to Google Chart encoding
+	 * @param arrat $a Array to encode
+	 * @return string
+	 */
+	private function arrayToExtendedEncoding($a) {
+		$xencoding = WT_GOOGLE_CHART_ENCODING;
     
-        $encoding = '';
-        foreach ($a as $value) {
-            if ($value < 0) {
-                $value = 0;
-            }
-            $first  = (int) ($value / 64);
-            $second = $value % 64;
-            $encoding .= $xencoding[(int) $first] . $xencoding[(int) $second];
-        }
+		$encoding = '';
+		foreach ($a as $value) {
+			if ($value < 0) {
+				$value = 0;
+			}
+			$first  = (int) ($value / 64);
+			$second = $value % 64;
+			$encoding .= $xencoding[(int) $first] . $xencoding[(int) $second];
+		}
     
-        return $encoding;
-    }
+		return $encoding;
+	}
     
     
 }
\ No newline at end of file

src/Webtrees/Module/Sosa/Model/SosaProvider.php

Indentation +561 added lines, -561 removed lines

@@ -22,390 +22,390 @@ 
  */
 class SosaProvider {
     
-    /**
-     * Maximum number of generation the database is able to hold.
-     * @var int MAX_DB_GENERATIONS
-     */
-    const MAX_DB_GENERATIONS = 64;
-    
-    /**
-     * System's default user (ID -1 in the database
-     * @var User $default_user
-     */
-    protected static $default_user;
-    
-    /**
-     * Reference user
-     * @var User $user
-     */
-    protected $user;
-    
-    /**
-     * Reference tree
-     * @var Tree $tree
-     */
-    protected $tree;
-    
-    /**
-     * Cached list of Sosa Individuals by generation
-     * Format: key = generation, value = array ( sosa => Individual ID)
-     * @var array $sosa_list_by_gen
-     */
-    protected $sosa_list_by_gen;
-    
-    /**
-     * Cached list of Sosa Families by generation
-     * Format: key = generation, value = array ( sosa => Family ID)
-     * @var unknown $sosa_fam_list_by_gen
-     */
-    protected $sosa_fam_list_by_gen;
-    
-    /**
-     * Cached array of statistics by generation
-     * Format:  key = generation, 
-     *          value = array(
-     *              sosaCount, sosaTotalCount, diffSosaTotalCount, firstBirth, lastBirth, avgBirth
-     *           )
-     * @var array $statistics_tab
-     */
-    protected $statistics_tab;
-    
-    /**
-     * Has the provider's initialisation completed
-     * @var bool $is_setup
-     */
-    protected $is_setup;
-    
-    /**
-     * Constructor for Sosa Provider.
-     * A provider is defined in relation to a specific tree and reference user.
-     * 
-     * @param Tree $tree
-     * @param User $user
-     */
-    public function __construct(Tree $tree, User $user = null) {
-        if(self::$default_user === null) 
-            self::$default_user = User::find(-1);
+	/**
+	 * Maximum number of generation the database is able to hold.
+	 * @var int MAX_DB_GENERATIONS
+	 */
+	const MAX_DB_GENERATIONS = 64;
+    
+	/**
+	 * System's default user (ID -1 in the database
+	 * @var User $default_user
+	 */
+	protected static $default_user;
+    
+	/**
+	 * Reference user
+	 * @var User $user
+	 */
+	protected $user;
+    
+	/**
+	 * Reference tree
+	 * @var Tree $tree
+	 */
+	protected $tree;
+    
+	/**
+	 * Cached list of Sosa Individuals by generation
+	 * Format: key = generation, value = array ( sosa => Individual ID)
+	 * @var array $sosa_list_by_gen
+	 */
+	protected $sosa_list_by_gen;
+    
+	/**
+	 * Cached list of Sosa Families by generation
+	 * Format: key = generation, value = array ( sosa => Family ID)
+	 * @var unknown $sosa_fam_list_by_gen
+	 */
+	protected $sosa_fam_list_by_gen;
+    
+	/**
+	 * Cached array of statistics by generation
+	 * Format:  key = generation, 
+	 *          value = array(
+	 *              sosaCount, sosaTotalCount, diffSosaTotalCount, firstBirth, lastBirth, avgBirth
+	 *           )
+	 * @var array $statistics_tab
+	 */
+	protected $statistics_tab;
+    
+	/**
+	 * Has the provider's initialisation completed
+	 * @var bool $is_setup
+	 */
+	protected $is_setup;
+    
+	/**
+	 * Constructor for Sosa Provider.
+	 * A provider is defined in relation to a specific tree and reference user.
+	 * 
+	 * @param Tree $tree
+	 * @param User $user
+	 */
+	public function __construct(Tree $tree, User $user = null) {
+		if(self::$default_user === null) 
+			self::$default_user = User::find(-1);
         
-        $this->tree = $tree;
-        $this->user = $user;
-        $this->is_setup = true;
-        if($this->user === null) $this->user = Auth::user();
-        if(strlen($this->user->getUserId()) == 0) $this->user = self::$default_user;
+		$this->tree = $tree;
+		$this->user = $user;
+		$this->is_setup = true;
+		if($this->user === null) $this->user = Auth::user();
+		if(strlen($this->user->getUserId()) == 0) $this->user = self::$default_user;
         
-        // Check if the user, or the default user, has a root already setup;
-        if(empty($this->getRootIndiId())) {
-            if($this->user == self::$default_user) {  // If the default user is not setup
-                $this->is_setup = false;
-            }
-            else {
-                $this->user = self::$default_user;
-                $this->is_setup = $this->getRootIndiId() === null;
-            }            
-        }
-    }
-    
-    /**
-     * Returns is the Provider has been successfully set up
-     * @return bool
-     */
-    public function isSetup() {
-        return $this->is_setup;
-    }
-    
-    /**
-     * Return the root individual ID for the reference tree and user.
-     * @return string Individual ID
-     */
-    public function getRootIndiId() {
-        return $this->tree->getUserPreference($this->user, 'MAJ_SOSA_ROOT_ID');
-    }
-    
-    /**
-     * Return the root individual for the reference tree and user.
-     * @return Individual Individual
-     */
-    public function getRootIndi() {
-        $root_indi_id = $this->getRootIndiId();
-        if(!empty($root_indi_id)) {
-            return Individual::getInstance($root_indi_id, $this->tree);
-        }
-        return null;
-    }
+		// Check if the user, or the default user, has a root already setup;
+		if(empty($this->getRootIndiId())) {
+			if($this->user == self::$default_user) {  // If the default user is not setup
+				$this->is_setup = false;
+			}
+			else {
+				$this->user = self::$default_user;
+				$this->is_setup = $this->getRootIndiId() === null;
+			}            
+		}
+	}
+    
+	/**
+	 * Returns is the Provider has been successfully set up
+	 * @return bool
+	 */
+	public function isSetup() {
+		return $this->is_setup;
+	}
+    
+	/**
+	 * Return the root individual ID for the reference tree and user.
+	 * @return string Individual ID
+	 */
+	public function getRootIndiId() {
+		return $this->tree->getUserPreference($this->user, 'MAJ_SOSA_ROOT_ID');
+	}
+    
+	/**
+	 * Return the root individual for the reference tree and user.
+	 * @return Individual Individual
+	 */
+	public function getRootIndi() {
+		$root_indi_id = $this->getRootIndiId();
+		if(!empty($root_indi_id)) {
+			return Individual::getInstance($root_indi_id, $this->tree);
+		}
+		return null;
+	}
        
-    /*****************
+	/*****************
      * DATA CRUD LAYER
      *****************/
     
-    /**
-     * Remove all Sosa entries related to the gedcom file and user
-     */
-    public function deleteAll() {
-        if(!$this->is_setup) return;
-        Database::prepare(
-            'DELETE FROM `##maj_sosa`'.
-            ' WHERE majs_gedcom_id= :tree_id and majs_user_id = :user_id ')
-            ->execute(array(
-                'tree_id' => $this->tree->getTreeId(), 
-                'user_id' => $this->user->getUserId()                
-            ));
-    }
-    
-    /**
-     * Remove all ancestors of a sosa number
-     * 
-     * @param int $sosa
-     */
-    public function deleteAncestors($sosa) {
-        if(!$this->is_setup) return;
-        $gen = Functions::getGeneration($sosa);
-        Database::prepare(
-            'DELETE FROM `##maj_sosa`'.
-            ' WHERE majs_gedcom_id=:tree_id and majs_user_id = :user_id' .
-            ' AND majs_gen >= :gen' .
-            ' AND FLOOR(majs_sosa / (POW(2, (majs_gen - :gen)))) = :sosa'
-        )->execute(array(
-            'tree_id' => $this->tree->getTreeId(), 
-            'user_id' => $this->user->getUserId(),
-            'gen' => $gen,
-            'sosa' => $sosa
-        ));
-    }    
-    
-    /**
-     * Insert (or update if already existing) a list of Sosa individuals
-     * @param array $sosa_records
-     */
-    public function insertOrUpdate($sosa_records) {
-        if(!$this->is_setup) return;
+	/**
+	 * Remove all Sosa entries related to the gedcom file and user
+	 */
+	public function deleteAll() {
+		if(!$this->is_setup) return;
+		Database::prepare(
+			'DELETE FROM `##maj_sosa`'.
+			' WHERE majs_gedcom_id= :tree_id and majs_user_id = :user_id ')
+			->execute(array(
+				'tree_id' => $this->tree->getTreeId(), 
+				'user_id' => $this->user->getUserId()                
+			));
+	}
+    
+	/**
+	 * Remove all ancestors of a sosa number
+	 * 
+	 * @param int $sosa
+	 */
+	public function deleteAncestors($sosa) {
+		if(!$this->is_setup) return;
+		$gen = Functions::getGeneration($sosa);
+		Database::prepare(
+			'DELETE FROM `##maj_sosa`'.
+			' WHERE majs_gedcom_id=:tree_id and majs_user_id = :user_id' .
+			' AND majs_gen >= :gen' .
+			' AND FLOOR(majs_sosa / (POW(2, (majs_gen - :gen)))) = :sosa'
+		)->execute(array(
+			'tree_id' => $this->tree->getTreeId(), 
+			'user_id' => $this->user->getUserId(),
+			'gen' => $gen,
+			'sosa' => $sosa
+		));
+	}    
+    
+	/**
+	 * Insert (or update if already existing) a list of Sosa individuals
+	 * @param array $sosa_records
+	 */
+	public function insertOrUpdate($sosa_records) {
+		if(!$this->is_setup) return;
         
-        $treeid = $this->tree->getTreeId();
-        $userid = $this->user->getUserId();
-        $questionmarks_table = array();
-        $values_table = array();
+		$treeid = $this->tree->getTreeId();
+		$userid = $this->user->getUserId();
+		$questionmarks_table = array();
+		$values_table = array();
         
-        $i = 0;
-        foreach  ($sosa_records as $row) {
-            $gen = Functions::getGeneration($row['sosa']);
-            if($gen <= self::MAX_DB_GENERATIONS) {
-                $questionmarks_table[] = 
-                    '(:tree_id'.$i.', :user_id'.$i.', :sosa'.$i.', :indi_id'.$i.', :gen'.$i.', :byear'.$i.', :dyear'.$i.')';
-                $values_table = array_merge(
-                    $values_table, 
-                    array(
-                        'tree_id'.$i => $treeid, 
-                        'user_id'.$i => $userid, 
-                        'sosa'.$i => $row['sosa'], 
-                        'indi_id'.$i => $row['indi'], 
-                        'gen'.$i => Functions::getGeneration($row['sosa']),
-                        'byear'.$i => $row['birth_year'],
-                        'dyear'.$i => $row['death_year']
-                    )
-                );
-            }
-            $i++;
-        }
+		$i = 0;
+		foreach  ($sosa_records as $row) {
+			$gen = Functions::getGeneration($row['sosa']);
+			if($gen <= self::MAX_DB_GENERATIONS) {
+				$questionmarks_table[] = 
+					'(:tree_id'.$i.', :user_id'.$i.', :sosa'.$i.', :indi_id'.$i.', :gen'.$i.', :byear'.$i.', :dyear'.$i.')';
+				$values_table = array_merge(
+					$values_table, 
+					array(
+						'tree_id'.$i => $treeid, 
+						'user_id'.$i => $userid, 
+						'sosa'.$i => $row['sosa'], 
+						'indi_id'.$i => $row['indi'], 
+						'gen'.$i => Functions::getGeneration($row['sosa']),
+						'byear'.$i => $row['birth_year'],
+						'dyear'.$i => $row['death_year']
+					)
+				);
+			}
+			$i++;
+		}
         
-        $sql = 'REPLACE INTO `##maj_sosa`' .
-            ' (majs_gedcom_id, majs_user_id, majs_sosa, majs_i_id, majs_gen, majs_birth_year, majs_death_year)' .
-            ' VALUES '. implode(',', $questionmarks_table);
-        Database::prepare($sql)->execute($values_table);
-    }
+		$sql = 'REPLACE INTO `##maj_sosa`' .
+			' (majs_gedcom_id, majs_user_id, majs_sosa, majs_i_id, majs_gen, majs_birth_year, majs_death_year)' .
+			' VALUES '. implode(',', $questionmarks_table);
+		Database::prepare($sql)->execute($values_table);
+	}
     
-    /****************
+	/****************
      * SIMPLE QUERIES
      ****************/
     
-    /**
-     * Returns the list of Sosa numbers to which an individual is related.
-     * Format: key = sosa number, value = generation for the Sosa number
-     * 
-     * @param Individual $indi
-     * @return array Array of sosa numbers
-     */
-    public function getSosaNumbers(Individual $indi) {
-        if(!$this->is_setup) return array();
-        return Database::prepare(
-                'SELECT majs_sosa, majs_gen FROM `##maj_sosa`'.
-                ' WHERE majs_i_id=:indi_id AND majs_gedcom_id=:tree_id AND majs_user_id=:user_id'
-            )->execute(array(
-                'indi_id' => $indi->getXref(), 
-                'tree_id' => $this->tree->getTreeId(), 
-                'user_id' => $this->user->getUserId()
-            ))->fetchAssoc();
-    }
-    
-    /**
-     * Get the last generation of Sosa ancestors
-     *
-     * @return number Last generation if found, 1 otherwise
-     */
-    public function getLastGeneration() {
-        if(!$this->is_setup) return;
-        return Database::prepare(
-                'SELECT MAX(majs_gen) FROM `##maj_sosa`'.
-                ' WHERE majs_gedcom_id=:tree_id AND majs_user_id=:user_id'
-            )->execute(array(
-                'tree_id' => $this->tree->getTreeId(), 
-                'user_id' => $this->user->getUserId()                
-            ))->fetchOne() ?: 1;
-    }
-    
-    /*************
+	/**
+	 * Returns the list of Sosa numbers to which an individual is related.
+	 * Format: key = sosa number, value = generation for the Sosa number
+	 * 
+	 * @param Individual $indi
+	 * @return array Array of sosa numbers
+	 */
+	public function getSosaNumbers(Individual $indi) {
+		if(!$this->is_setup) return array();
+		return Database::prepare(
+				'SELECT majs_sosa, majs_gen FROM `##maj_sosa`'.
+				' WHERE majs_i_id=:indi_id AND majs_gedcom_id=:tree_id AND majs_user_id=:user_id'
+			)->execute(array(
+				'indi_id' => $indi->getXref(), 
+				'tree_id' => $this->tree->getTreeId(), 
+				'user_id' => $this->user->getUserId()
+			))->fetchAssoc();
+	}
+    
+	/**
+	 * Get the last generation of Sosa ancestors
+	 *
+	 * @return number Last generation if found, 1 otherwise
+	 */
+	public function getLastGeneration() {
+		if(!$this->is_setup) return;
+		return Database::prepare(
+				'SELECT MAX(majs_gen) FROM `##maj_sosa`'.
+				' WHERE majs_gedcom_id=:tree_id AND majs_user_id=:user_id'
+			)->execute(array(
+				'tree_id' => $this->tree->getTreeId(), 
+				'user_id' => $this->user->getUserId()                
+			))->fetchOne() ?: 1;
+	}
+    
+	/*************
      * SOSA LISTS
      *************/
     
-    /**
-     * Return the list of all sosas, with the generations it belongs to
-     *
-     * @param int $ged_id ID of the gedcom file
-     * @return array Associative array of Sosa ancestors, with their generation, comma separated
-     */
-    public function getAllSosaWithGenerations(){
-        if(!$this->is_setup) return array();
-        return Database::prepare(
-            'SELECT majs_i_id AS indi,' .
-            ' GROUP_CONCAT(DISTINCT majs_gen ORDER BY majs_gen ASC SEPARATOR ",") AS generations' .
-            ' FROM `##maj_sosa`' .
-            ' WHERE majs_gedcom_id=:tree_id AND majs_user_id=:user_id' .
-            ' GROUP BY majs_i_id'
-        )->execute(array(
-            'tree_id' => $this->tree->getTreeId(),
-            'user_id' => $this->user->getUserId()
-        ))->fetchAssoc();
-    }
-    
-    /**
-     * Get an associative array of Sosa individuals in generation G. Keys are Sosa numbers, values individuals.
-     *
-     * @param number $gen Generation
-     * @return array Array of Sosa individuals
-     */
-    public function getSosaListAtGeneration($gen){
-        if(!$this->is_setup) return array();
-        if(!$this->sosa_list_by_gen)
-            $this->sosa_list_by_gen = array();
+	/**
+	 * Return the list of all sosas, with the generations it belongs to
+	 *
+	 * @param int $ged_id ID of the gedcom file
+	 * @return array Associative array of Sosa ancestors, with their generation, comma separated
+	 */
+	public function getAllSosaWithGenerations(){
+		if(!$this->is_setup) return array();
+		return Database::prepare(
+			'SELECT majs_i_id AS indi,' .
+			' GROUP_CONCAT(DISTINCT majs_gen ORDER BY majs_gen ASC SEPARATOR ",") AS generations' .
+			' FROM `##maj_sosa`' .
+			' WHERE majs_gedcom_id=:tree_id AND majs_user_id=:user_id' .
+			' GROUP BY majs_i_id'
+		)->execute(array(
+			'tree_id' => $this->tree->getTreeId(),
+			'user_id' => $this->user->getUserId()
+		))->fetchAssoc();
+	}
+    
+	/**
+	 * Get an associative array of Sosa individuals in generation G. Keys are Sosa numbers, values individuals.
+	 *
+	 * @param number $gen Generation
+	 * @return array Array of Sosa individuals
+	 */
+	public function getSosaListAtGeneration($gen){
+		if(!$this->is_setup) return array();
+		if(!$this->sosa_list_by_gen)
+			$this->sosa_list_by_gen = array();
         
-        if($gen){
-            if(!isset($this->sosa_list_by_gen[$gen])){
-                $this->sosa_list_by_gen[$gen] = Database::prepare(
-                    'SELECT majs_sosa AS sosa, majs_i_id AS indi'.
-                    ' FROM `##maj_sosa`'.
-                    ' WHERE majs_gedcom_id=:tree_id AND majs_user_id=:user_id'.
-                    ' AND majs_gen = :gen'.
-                    ' ORDER BY majs_sosa ASC')
-                ->execute(array(
-                    'tree_id' => $this->tree->getTreeId(),
-                    'user_id' => $this->user->getUserId(),
-                    'gen' => $gen
-                ))
-                ->fetchAssoc();
-            }
-            return $this->sosa_list_by_gen[$gen];
-        }
-        return array();
-    }
-    
-    /**
-     * Get an associative array of Sosa families in generation G. Keys are Sosa numbers for the husband, values families.
-     *
-     * @param number $gen Generation
-     * @return array Array of Sosa families
-     */
-    public function getFamilySosaListAtGeneration($gen){
-        if(!$this->is_setup) return array();
-        if(!$this->sosa_fam_list_by_gen)
-            $this->sosa_fam_list_by_gen = array();
+		if($gen){
+			if(!isset($this->sosa_list_by_gen[$gen])){
+				$this->sosa_list_by_gen[$gen] = Database::prepare(
+					'SELECT majs_sosa AS sosa, majs_i_id AS indi'.
+					' FROM `##maj_sosa`'.
+					' WHERE majs_gedcom_id=:tree_id AND majs_user_id=:user_id'.
+					' AND majs_gen = :gen'.
+					' ORDER BY majs_sosa ASC')
+				->execute(array(
+					'tree_id' => $this->tree->getTreeId(),
+					'user_id' => $this->user->getUserId(),
+					'gen' => $gen
+				))
+				->fetchAssoc();
+			}
+			return $this->sosa_list_by_gen[$gen];
+		}
+		return array();
+	}
+    
+	/**
+	 * Get an associative array of Sosa families in generation G. Keys are Sosa numbers for the husband, values families.
+	 *
+	 * @param number $gen Generation
+	 * @return array Array of Sosa families
+	 */
+	public function getFamilySosaListAtGeneration($gen){
+		if(!$this->is_setup) return array();
+		if(!$this->sosa_fam_list_by_gen)
+			$this->sosa_fam_list_by_gen = array();
         
-        if($gen){
-            if(!isset($this->sosa_fam_list_by_gen[$gen])){
-                $this->sosa_fam_list_by_gen[$gen] = Database::prepare(
-                    'SELECT s1.majs_sosa AS sosa, f_id AS fam'.
-                    ' FROM `##families`'.
-                    ' INNER JOIN `##maj_sosa` AS s1 ON (`##families`.f_husb = s1.majs_i_id AND `##families`.f_file = s1.majs_gedcom_id)'.
-                    ' INNER JOIN `##maj_sosa` AS s2 ON (`##families`.f_wife = s2.majs_i_id AND `##families`.f_file = s2.majs_gedcom_id)'.
-                    ' WHERE s1.majs_sosa + 1 = s2.majs_sosa'.
-                    ' AND s1.majs_gedcom_id= :tree_id AND s1.majs_user_id=:user_id'.
-                    ' AND s2.majs_gedcom_id= :tree_id AND s2.majs_user_id=:user_id'.
-                    ' AND s1.majs_gen = :gen'.
-                    ' ORDER BY s1.majs_sosa ASC'
-                    )
-                    ->execute(array(
-                        'tree_id' => $this->tree->getTreeId(),
-                        'user_id' => $this->user->getUserId(),
-                        'gen' => $gen
-                    ))
-                    ->fetchAssoc();
-            }
-            return $this->sosa_fam_list_by_gen[$gen];
-        }
-        return array();
-    }
-    
-    /**
-     * Get an associative array of Sosa individuals in generation G who are missing parents. Keys are Sosa numbers, values individuals.
-     *
-     * @param number $gen Generation
-     * @return array Array of Sosa individuals
-     */
-    public function getMissingSosaListAtGeneration($gen){
-        if(!$this->is_setup) return array();    
-        if($gen){
-            return $this->sosa_list_by_gen[$gen] = Database::prepare(
-                'SELECT schild.majs_sosa sosa, schild.majs_i_id indi, sfat.majs_sosa IS NOT NULL has_father, smot.majs_sosa IS NOT NULL has_mother'.
-                ' FROM `##maj_sosa` schild'.
-                ' LEFT JOIN `##maj_sosa` sfat ON ((schild.majs_sosa * 2) = sfat.majs_sosa AND schild.majs_gedcom_id = sfat.majs_gedcom_id AND schild.majs_user_id = sfat.majs_user_id)'.
-                ' LEFT JOIN `##maj_sosa` smot ON ((schild.majs_sosa * 2 + 1) = smot.majs_sosa AND schild.majs_gedcom_id = smot.majs_gedcom_id AND schild.majs_user_id = smot.majs_user_id)'.
-                ' WHERE schild.majs_gedcom_id = :tree_id AND schild.majs_user_id = :user_id'.
-                ' AND schild.majs_gen = :gen'.
-                ' AND (sfat.majs_sosa IS NULL OR smot.majs_sosa IS NULL)'.
-                ' ORDER BY schild.majs_sosa ASC')
-                ->execute(array(
-                    'tree_id' => $this->tree->getTreeId(),
-                    'user_id' => $this->user->getUserId(),
-                    'gen' => $gen - 1
-                ))->fetchAll(\PDO::FETCH_ASSOC);
-        }
-        return array();
-    }
-    
-    
-    
-    /*************
+		if($gen){
+			if(!isset($this->sosa_fam_list_by_gen[$gen])){
+				$this->sosa_fam_list_by_gen[$gen] = Database::prepare(
+					'SELECT s1.majs_sosa AS sosa, f_id AS fam'.
+					' FROM `##families`'.
+					' INNER JOIN `##maj_sosa` AS s1 ON (`##families`.f_husb = s1.majs_i_id AND `##families`.f_file = s1.majs_gedcom_id)'.
+					' INNER JOIN `##maj_sosa` AS s2 ON (`##families`.f_wife = s2.majs_i_id AND `##families`.f_file = s2.majs_gedcom_id)'.
+					' WHERE s1.majs_sosa + 1 = s2.majs_sosa'.
+					' AND s1.majs_gedcom_id= :tree_id AND s1.majs_user_id=:user_id'.
+					' AND s2.majs_gedcom_id= :tree_id AND s2.majs_user_id=:user_id'.
+					' AND s1.majs_gen = :gen'.
+					' ORDER BY s1.majs_sosa ASC'
+					)
+					->execute(array(
+						'tree_id' => $this->tree->getTreeId(),
+						'user_id' => $this->user->getUserId(),
+						'gen' => $gen
+					))
+					->fetchAssoc();
+			}
+			return $this->sosa_fam_list_by_gen[$gen];
+		}
+		return array();
+	}
+    
+	/**
+	 * Get an associative array of Sosa individuals in generation G who are missing parents. Keys are Sosa numbers, values individuals.
+	 *
+	 * @param number $gen Generation
+	 * @return array Array of Sosa individuals
+	 */
+	public function getMissingSosaListAtGeneration($gen){
+		if(!$this->is_setup) return array();    
+		if($gen){
+			return $this->sosa_list_by_gen[$gen] = Database::prepare(
+				'SELECT schild.majs_sosa sosa, schild.majs_i_id indi, sfat.majs_sosa IS NOT NULL has_father, smot.majs_sosa IS NOT NULL has_mother'.
+				' FROM `##maj_sosa` schild'.
+				' LEFT JOIN `##maj_sosa` sfat ON ((schild.majs_sosa * 2) = sfat.majs_sosa AND schild.majs_gedcom_id = sfat.majs_gedcom_id AND schild.majs_user_id = sfat.majs_user_id)'.
+				' LEFT JOIN `##maj_sosa` smot ON ((schild.majs_sosa * 2 + 1) = smot.majs_sosa AND schild.majs_gedcom_id = smot.majs_gedcom_id AND schild.majs_user_id = smot.majs_user_id)'.
+				' WHERE schild.majs_gedcom_id = :tree_id AND schild.majs_user_id = :user_id'.
+				' AND schild.majs_gen = :gen'.
+				' AND (sfat.majs_sosa IS NULL OR smot.majs_sosa IS NULL)'.
+				' ORDER BY schild.majs_sosa ASC')
+				->execute(array(
+					'tree_id' => $this->tree->getTreeId(),
+					'user_id' => $this->user->getUserId(),
+					'gen' => $gen - 1
+				))->fetchAll(\PDO::FETCH_ASSOC);
+		}
+		return array();
+	}
+    
+    
+    
+	/*************
      * STATISTICS
      *************/
-    /**
-     * Get the statistic array detailed by generation.
-     * Statistics for each generation are:
-     * 	- The number of Sosa in generation
-     * 	- The number of Sosa up to generation
-     *  - The number of distinct Sosa up to generation
-     *  - The year of the first birth in generation
-     *  - The year of the last birth in generation
-     *  - The average year of birth in generation
-     *
-     * @return array Statistics array
-     */
-    public function getStatisticsByGeneration() {
-        if(!$this->is_setup) return array();
-        if(!$this->statistics_tab) {
-            $this->statistics_tab = array();
-            if($maxGeneration = $this->getLastGeneration()) {
-                for ($gen = 1; $gen <= $maxGeneration; $gen++) {
-                    $birthStats = $this->getStatsBirthYearInGeneration($gen);
-                    $this->statistics_tab[$gen] = array(
-                        'sosaCount'				=>	$this->getSosaCountAtGeneration($gen),
-                        'sosaTotalCount'		=>	$this->getSosaCountUpToGeneration($gen),
-                        'diffSosaTotalCount'	=>	$this->getDifferentSosaCountUpToGeneration($gen),
-                        'firstBirth'			=>	$birthStats['first'],
-                        'lastBirth'				=>	$birthStats['last'],
-                        'avgBirth'				=>	$birthStats['avg']
-                    );
-                }
-            }
-        }
-        return $this->statistics_tab;        
-    }
+	/**
+	 * Get the statistic array detailed by generation.
+	 * Statistics for each generation are:
+	 * 	- The number of Sosa in generation
+	 * 	- The number of Sosa up to generation
+	 *  - The number of distinct Sosa up to generation
+	 *  - The year of the first birth in generation
+	 *  - The year of the last birth in generation
+	 *  - The average year of birth in generation
+	 *
+	 * @return array Statistics array
+	 */
+	public function getStatisticsByGeneration() {
+		if(!$this->is_setup) return array();
+		if(!$this->statistics_tab) {
+			$this->statistics_tab = array();
+			if($maxGeneration = $this->getLastGeneration()) {
+				for ($gen = 1; $gen <= $maxGeneration; $gen++) {
+					$birthStats = $this->getStatsBirthYearInGeneration($gen);
+					$this->statistics_tab[$gen] = array(
+						'sosaCount'				=>	$this->getSosaCountAtGeneration($gen),
+						'sosaTotalCount'		=>	$this->getSosaCountUpToGeneration($gen),
+						'diffSosaTotalCount'	=>	$this->getDifferentSosaCountUpToGeneration($gen),
+						'firstBirth'			=>	$birthStats['first'],
+						'lastBirth'				=>	$birthStats['last'],
+						'avgBirth'				=>	$birthStats['avg']
+					);
+				}
+			}
+		}
+		return $this->statistics_tab;        
+	}
     
 	/**
 	 * How many individuals exist in the tree.
@@ -413,205 +413,205 @@ 
 	 * @return int
 	 */
 	public function getTotalIndividuals() {
-	    if(!$this->is_setup) return 0;
-	    return Database::prepare(
-	        'SELECT SQL_CACHE COUNT(*) FROM `##individuals`' .
-	        ' WHERE i_file = :tree_id')
-	        ->execute(array('tree_id' => $this->tree->getTreeId()))
-	        ->fetchOne() ?: 0;
+		if(!$this->is_setup) return 0;
+		return Database::prepare(
+			'SELECT SQL_CACHE COUNT(*) FROM `##individuals`' .
+			' WHERE i_file = :tree_id')
+			->execute(array('tree_id' => $this->tree->getTreeId()))
+			->fetchOne() ?: 0;
 	}
     
-    /**
-     * Get the total Sosa count for all generations
-     *
-     * @return number Number of Sosas
-     */
-    public function getSosaCount(){
-        if(!$this->is_setup) return 0;
-        return Database::prepare(
-            'SELECT SQL_CACHE COUNT(majs_sosa) FROM `##maj_sosa`' .
-            ' WHERE majs_gedcom_id=:tree_id AND majs_user_id=:user_id')
-            ->execute(array(
-                'tree_id' => $this->tree->getTreeId(), 
-                'user_id' => $this->user->getUserId() 
-            ))->fetchOne() ?: 0;
-    }
-    
-    /**
-     * Get the number of Sosa in a specific generation.
-     *
-     * @param number $gen Generation
-     * @return number Number of Sosas in generation
-     */
-    public function getSosaCountAtGeneration($gen){
-        if(!$this->is_setup) return 0;
-        return Database::prepare(
-            'SELECT SQL_CACHE COUNT(majs_sosa) FROM `##maj_sosa`' .
-            ' WHERE majs_gedcom_id=:tree_id AND majs_user_id=:user_id'.
-            ' AND majs_gen= :gen')
-        ->execute(array(
-                'tree_id' => $this->tree->getTreeId(), 
-                'user_id' => $this->user->getUserId(),
-                'gen' => $gen            
-        ))->fetchOne() ?: 0;
-    }
-    
-    /**
-     * Get the total number of Sosa up to a specific generation.
-     *
-     * @param number $gen Generation
-     * @return number Total number of Sosas up to generation
-     */
-    public function getSosaCountUpToGeneration($gen){
-        if(!$this->is_setup) return 0;
-        return Database::prepare(
-            'SELECT SQL_CACHE COUNT(majs_sosa) FROM `##maj_sosa`' .
-            ' WHERE majs_gedcom_id=:tree_id AND majs_user_id=:user_id'.
-            ' AND majs_gen <= :gen')
-        ->execute(array(
-                'tree_id' => $this->tree->getTreeId(), 
-                'user_id' => $this->user->getUserId(),
-                'gen' => $gen 
-        ))->fetchOne() ?: 0;
-    }
-    
-    /**
-     * Get the total number of distinct Sosa individual for all generations.
-     *
-     * @return number Total number of distinct individual
-     */
-    public function getDifferentSosaCount(){
-        if(!$this->is_setup) return 0;
-        return Database::prepare(
-            'SELECT SQL_CACHE COUNT(DISTINCT majs_i_id) FROM `##maj_sosa`' .
-            ' WHERE majs_gedcom_id=:tree_id AND majs_user_id=:user_id')
-        ->execute(array(
-                'tree_id' => $this->tree->getTreeId(), 
-                'user_id' => $this->user->getUserId()
-        ))->fetchOne() ?: 0;
-    }
-    
-    /**
-     * Get the number of distinct Sosa individual up to a specific generation.
-     *
-     * @param number $gen Generation
-     * @return number Number of distinct Sosa individuals up to generation
-     */
-    public function getDifferentSosaCountUpToGeneration($gen){
-        if(!$this->is_setup) return 0;
-        return Database::prepare(
-            'SELECT SQL_CACHE COUNT(DISTINCT majs_i_id) FROM `##maj_sosa`' .
-            ' WHERE majs_gedcom_id=:tree_id AND majs_user_id=:user_id'.
-            ' AND majs_gen <= :gen')
-        ->execute(array(
-                'tree_id' => $this->tree->getTreeId(), 
-                'user_id' => $this->user->getUserId(),
-                'gen' => $gen 
-        ))->fetchOne() ?: 0;
-    }
-    
-    /**
-     * Get an array of birth statistics for a specific generation
-     * Statistics are :
-     * 	- first : First birth year in generation
-     *  - last : Last birth year in generation
-     *  - avg : Average birth year
-     *
-     * @param number $gen Generation
-     * @return array Birth statistics array
-     */
-    public function getStatsBirthYearInGeneration($gen){
-        if(!$this->is_setup) return array('first' => 0, 'avg' => 0, 'last' => 0);
-        return Database::prepare(
-            'SELECT MIN(majs_birth_year) AS first, AVG(majs_birth_year) AS avg, MAX(majs_birth_year) AS last'.
-            ' FROM `##maj_sosa`' .
-            ' WHERE majs_gedcom_id=:tree_id AND majs_user_id=:user_id'.
-            ' AND majs_gen=:gen AND NOT majs_birth_year = :birth_year')
-            ->execute(array(
-                'tree_id' => $this->tree->getTreeId(), 
-                'user_id' => $this->user->getUserId(),
-                'gen' => $gen,
-                'birth_year' => 0))
-            ->fetchOneRow(\PDO::FETCH_ASSOC) ?: array('first' => 0, 'avg' => 0, 'last' => 0);
-    }
-    
-    /**
-     * Get the mean generation time, based on a linear regression of birth years and generations
-     *
-     * @return number|NULL Mean generation time
-     */
-    public function getMeanGenerationTime(){
-        if(!$this->is_setup) return;
-        if(!$this->statistics_tab){
-            $this->getStatisticsByGeneration();
-        }
-        //Linear regression on x=generation and y=birthdate
-        $sum_xy = 0;
-        $sum_x=0;
-        $sum_y=0;
-        $sum_x2=0;
-        $n=count($this->statistics_tab);
-        foreach($this->statistics_tab as $gen=>$stats){
-            $sum_xy+=$gen*$stats['avgBirth'];
-            $sum_x+=$gen;
-            $sum_y+=$stats['avgBirth'];
-            $sum_x2+=$gen*$gen;
-        }
-        $denom=($n*$sum_x2)-($sum_x*$sum_x);
-        if($denom!=0){
-            return -(($n*$sum_xy)-($sum_x*$sum_y))/($denom);
-        }
-        return null;
-    }
-    
-    /**
-     * Return a computed array of statistics about the dispersion of ancestors across the ancestors
-     * at a specified generation.
-     * This statistics cannot be used for generations above 11, as it would cause a out of range in MySQL
-     * 
-     * Format: 
-     *  - key : a base-2 representation of the ancestor at generation G for which exclusive ancestors have been found,
-     *          -1 is used for shared ancestors
-     *          For instance base2(0100) = base10(4) represent the maternal grand father
-     *  - values: number of ancestors exclusively in the ancestors of the ancestor in key
-     *  
-     *  For instance a result at generation 3 could be :
-     *      array (   -1        =>  12      -> 12 ancestors are shared by the grand-parents
-     *                base10(1) =>  32      -> 32 ancestors are exclusive to the paternal grand-father
-     *                base10(2) =>  25      -> 25 ancestors are exclusive to the paternal grand-mother
-     *                base10(4) =>  12      -> 12 ancestors are exclusive to the maternal grand-father
-     *                base10(8) =>  30      -> 30 ancestors are exclusive to the maternal grand-mother
-     *            )
-     *  
-     * @param int $gen Reference generation
-     * @return array
-     */
-    public function getAncestorDispersionForGen($gen) {
-        if(!$this->is_setup || $gen > 11) return array();  // Going further than 11 gen will be out of range in the query
-        return Database::prepare(
-            'SELECT branches, count(i_id)'.
-            ' FROM ('.
-            '   SELECT i_id,'.
-            '       CASE'.
-            '           WHEN CEIL(LOG2(SUM(branch))) = LOG2(SUM(branch)) THEN SUM(branch)'.
-            '           ELSE -1'.   // We put all ancestors shared between some branches in the same bucket
-            '       END branches'.
-            '   FROM ('.
-            '       SELECT DISTINCT majs_i_id i_id,'.
-            '           POW(2, FLOOR(majs_sosa / POW(2, (majs_gen - :gen))) - POW(2, :gen -1)) branch'.
-            '       FROM `##maj_sosa`'.
-            '       WHERE majs_gedcom_id = :tree_id AND majs_user_id = :user_id'.
-            '           AND majs_gen >= :gen'.
-            '   ) indistat'.
-            '   GROUP BY i_id'.
-            ') grouped'.
-            ' GROUP BY branches')
-            ->execute(array(
-                'tree_id' => $this->tree->getTreeId(), 
-                'user_id' => $this->user->getUserId(),
-                'gen' => $gen
-            ))->fetchAssoc() ?: array();
-    }
+	/**
+	 * Get the total Sosa count for all generations
+	 *
+	 * @return number Number of Sosas
+	 */
+	public function getSosaCount(){
+		if(!$this->is_setup) return 0;
+		return Database::prepare(
+			'SELECT SQL_CACHE COUNT(majs_sosa) FROM `##maj_sosa`' .
+			' WHERE majs_gedcom_id=:tree_id AND majs_user_id=:user_id')
+			->execute(array(
+				'tree_id' => $this->tree->getTreeId(), 
+				'user_id' => $this->user->getUserId() 
+			))->fetchOne() ?: 0;
+	}
+    
+	/**
+	 * Get the number of Sosa in a specific generation.
+	 *
+	 * @param number $gen Generation
+	 * @return number Number of Sosas in generation
+	 */
+	public function getSosaCountAtGeneration($gen){
+		if(!$this->is_setup) return 0;
+		return Database::prepare(
+			'SELECT SQL_CACHE COUNT(majs_sosa) FROM `##maj_sosa`' .
+			' WHERE majs_gedcom_id=:tree_id AND majs_user_id=:user_id'.
+			' AND majs_gen= :gen')
+		->execute(array(
+				'tree_id' => $this->tree->getTreeId(), 
+				'user_id' => $this->user->getUserId(),
+				'gen' => $gen            
+		))->fetchOne() ?: 0;
+	}
+    
+	/**
+	 * Get the total number of Sosa up to a specific generation.
+	 *
+	 * @param number $gen Generation
+	 * @return number Total number of Sosas up to generation
+	 */
+	public function getSosaCountUpToGeneration($gen){
+		if(!$this->is_setup) return 0;
+		return Database::prepare(
+			'SELECT SQL_CACHE COUNT(majs_sosa) FROM `##maj_sosa`' .
+			' WHERE majs_gedcom_id=:tree_id AND majs_user_id=:user_id'.
+			' AND majs_gen <= :gen')
+		->execute(array(
+				'tree_id' => $this->tree->getTreeId(), 
+				'user_id' => $this->user->getUserId(),
+				'gen' => $gen 
+		))->fetchOne() ?: 0;
+	}
+    
+	/**
+	 * Get the total number of distinct Sosa individual for all generations.
+	 *
+	 * @return number Total number of distinct individual
+	 */
+	public function getDifferentSosaCount(){
+		if(!$this->is_setup) return 0;
+		return Database::prepare(
+			'SELECT SQL_CACHE COUNT(DISTINCT majs_i_id) FROM `##maj_sosa`' .
+			' WHERE majs_gedcom_id=:tree_id AND majs_user_id=:user_id')
+		->execute(array(
+				'tree_id' => $this->tree->getTreeId(), 
+				'user_id' => $this->user->getUserId()
+		))->fetchOne() ?: 0;
+	}
+    
+	/**
+	 * Get the number of distinct Sosa individual up to a specific generation.
+	 *
+	 * @param number $gen Generation
+	 * @return number Number of distinct Sosa individuals up to generation
+	 */
+	public function getDifferentSosaCountUpToGeneration($gen){
+		if(!$this->is_setup) return 0;
+		return Database::prepare(
+			'SELECT SQL_CACHE COUNT(DISTINCT majs_i_id) FROM `##maj_sosa`' .
+			' WHERE majs_gedcom_id=:tree_id AND majs_user_id=:user_id'.
+			' AND majs_gen <= :gen')
+		->execute(array(
+				'tree_id' => $this->tree->getTreeId(), 
+				'user_id' => $this->user->getUserId(),
+				'gen' => $gen 
+		))->fetchOne() ?: 0;
+	}
+    
+	/**
+	 * Get an array of birth statistics for a specific generation
+	 * Statistics are :
+	 * 	- first : First birth year in generation
+	 *  - last : Last birth year in generation
+	 *  - avg : Average birth year
+	 *
+	 * @param number $gen Generation
+	 * @return array Birth statistics array
+	 */
+	public function getStatsBirthYearInGeneration($gen){
+		if(!$this->is_setup) return array('first' => 0, 'avg' => 0, 'last' => 0);
+		return Database::prepare(
+			'SELECT MIN(majs_birth_year) AS first, AVG(majs_birth_year) AS avg, MAX(majs_birth_year) AS last'.
+			' FROM `##maj_sosa`' .
+			' WHERE majs_gedcom_id=:tree_id AND majs_user_id=:user_id'.
+			' AND majs_gen=:gen AND NOT majs_birth_year = :birth_year')
+			->execute(array(
+				'tree_id' => $this->tree->getTreeId(), 
+				'user_id' => $this->user->getUserId(),
+				'gen' => $gen,
+				'birth_year' => 0))
+			->fetchOneRow(\PDO::FETCH_ASSOC) ?: array('first' => 0, 'avg' => 0, 'last' => 0);
+	}
+    
+	/**
+	 * Get the mean generation time, based on a linear regression of birth years and generations
+	 *
+	 * @return number|NULL Mean generation time
+	 */
+	public function getMeanGenerationTime(){
+		if(!$this->is_setup) return;
+		if(!$this->statistics_tab){
+			$this->getStatisticsByGeneration();
+		}
+		//Linear regression on x=generation and y=birthdate
+		$sum_xy = 0;
+		$sum_x=0;
+		$sum_y=0;
+		$sum_x2=0;
+		$n=count($this->statistics_tab);
+		foreach($this->statistics_tab as $gen=>$stats){
+			$sum_xy+=$gen*$stats['avgBirth'];
+			$sum_x+=$gen;
+			$sum_y+=$stats['avgBirth'];
+			$sum_x2+=$gen*$gen;
+		}
+		$denom=($n*$sum_x2)-($sum_x*$sum_x);
+		if($denom!=0){
+			return -(($n*$sum_xy)-($sum_x*$sum_y))/($denom);
+		}
+		return null;
+	}
+    
+	/**
+	 * Return a computed array of statistics about the dispersion of ancestors across the ancestors
+	 * at a specified generation.
+	 * This statistics cannot be used for generations above 11, as it would cause a out of range in MySQL
+	 * 
+	 * Format: 
+	 *  - key : a base-2 representation of the ancestor at generation G for which exclusive ancestors have been found,
+	 *          -1 is used for shared ancestors
+	 *          For instance base2(0100) = base10(4) represent the maternal grand father
+	 *  - values: number of ancestors exclusively in the ancestors of the ancestor in key
+	 *  
+	 *  For instance a result at generation 3 could be :
+	 *      array (   -1        =>  12      -> 12 ancestors are shared by the grand-parents
+	 *                base10(1) =>  32      -> 32 ancestors are exclusive to the paternal grand-father
+	 *                base10(2) =>  25      -> 25 ancestors are exclusive to the paternal grand-mother
+	 *                base10(4) =>  12      -> 12 ancestors are exclusive to the maternal grand-father
+	 *                base10(8) =>  30      -> 30 ancestors are exclusive to the maternal grand-mother
+	 *            )
+	 *  
+	 * @param int $gen Reference generation
+	 * @return array
+	 */
+	public function getAncestorDispersionForGen($gen) {
+		if(!$this->is_setup || $gen > 11) return array();  // Going further than 11 gen will be out of range in the query
+		return Database::prepare(
+			'SELECT branches, count(i_id)'.
+			' FROM ('.
+			'   SELECT i_id,'.
+			'       CASE'.
+			'           WHEN CEIL(LOG2(SUM(branch))) = LOG2(SUM(branch)) THEN SUM(branch)'.
+			'           ELSE -1'.   // We put all ancestors shared between some branches in the same bucket
+			'       END branches'.
+			'   FROM ('.
+			'       SELECT DISTINCT majs_i_id i_id,'.
+			'           POW(2, FLOOR(majs_sosa / POW(2, (majs_gen - :gen))) - POW(2, :gen -1)) branch'.
+			'       FROM `##maj_sosa`'.
+			'       WHERE majs_gedcom_id = :tree_id AND majs_user_id = :user_id'.
+			'           AND majs_gen >= :gen'.
+			'   ) indistat'.
+			'   GROUP BY i_id'.
+			') grouped'.
+			' GROUP BY branches')
+			->execute(array(
+				'tree_id' => $this->tree->getTreeId(), 
+				'user_id' => $this->user->getUserId(),
+				'gen' => $gen
+			))->fetchAssoc() ?: array();
+	}
     
                
 }