bigly-chat/docs/stats.php

<?php
    require(__DIR__ . "/../libs/page.php");
    require(__DIR__ . "/../libs/form.php");
	require(__DIR__ . "/../libs/comment.php");    

    page_header();

    function get_handler() {
        global $db;
        
        $stmt = $db->prepare("SELECT * FROM main.auth"); //weirdly, this requires a schema name
        $stmt->execute([]);
        $result = $stmt->fetchAll(PDO::FETCH_DEFAULT);

		$pr = array();
		$fcount = array();
		$frs = array();	
		$matrixe = array();
		$msum_old = 0;

		foreach ($result as $usern) {
			$fn = $usern['username'];

			$pr[$fn] = 1;

			$stmt = $db->prepare("SELECT * FROM main.follow WHERE target = ? AND NOT username = ?");
			$stmt->execute([$fn,$fn]);

			$fcount[$fn] = count($stmt->fetchAll(PDO::FETCH_DEFAULT));
			
			$stmt = $db->prepare("SELECT * FROM main.follow WHERE username = ?");
			$stmt->execute([$fn]);

			$frs[$fn] = $stmt->fetchAll(PDO::FETCH_DEFAULT);
	
			$matrixe[$fn] = array();
			$matrixe[$fn][$fn] = 1;
			$msum_old++;
		}	

		$ch = 0;
		foreach ($result as $usern) {
			$theuser = $usern['username'];
		
			$followers = $frs[$theuser];
		
			if (count($followers) > 0) {
				$ch++;
			}
		
			foreach ($followers as $follown) {
				$fn = $follown['target'];

				if ($usern['username'] == $fn) continue;
				$dst = $fcount[$fn];

				$msum_old += $matrixe[$usern['username']][$fn] = 1 + 1 / ($dst + 10) / 10;
						
				///$pr[$usern['username']] += $pr[$fn] / ($dst + 10) / 10;	
			}
		}
		for ($i = 0; $i < 10; $i++) {
			$prold = $pr;
			$matrixf = $matrixe;
			$msum = 0;

			foreach ($result as $usera) {
				$una = $usera['username'];
				if (count($frs[$una]) == 0) continue;
				foreach ($result as $userb) {
					$unb = $userb['username'];
					$prb = $prold[$unb];
					if ($prb < 1 /1e6) {
						continue;
					}
				}
			}

			foreach ($result as $usera) {
				$una = $usera['username'];
				$pr[$una] = 0.1;	
				if (count($frs[$una]) == 0) continue;
			
				foreach ($result as $userb) {
					$unb = $userb['username'];
					$prb = $prold[$unb];
					if ($prb < 1 / 1e6) {
						$msum += $matrixe[$una][$unb];
						continue;
					}
					$matrixe[$una][$unb] = 0;
	
					foreach ($result as $userc) {
						$unc = $userc['username'];
						$matrixe[$una][$unb] += $matrixf[$una][$unc] * $matrixf[$unc][$unb];
					}

					$msum += $matrixe[$una][$unb];
					$pr[$una] += $prb * $matrixe[$una][$unb];
				}
			}

			foreach ($result as $usera) {
				$una = $usera['username'];
			
				foreach ($result as $userb) {
					$unb = $userb['username'];
					$matrixe[$una][$unb] *= $msum_old / $msum;
				}
			}	

			$new_sum = array_sum($pr);
			foreach ($result as $usern) {
				$h = $pr[$usern['username']];
				$pr[$usern['username']] /= $new_sum;  		
			}
		}

		$new_sum = array_sum($pr);
		foreach ($result as $usern) {
			$pr[$usern['username']] = $pr[$usern['username']] * 100 / $new_sum;  		
		}

		function cmp($a, $b) {
			if ($a == $b) {
				return 0;
			}
			return ($a > $b) ? -1 : 1;
		}

		uasort($pr,'cmp');

		foreach ($pr as $usern => $rr) { ?>
		<div class='comment'>
			<div class="avatar">
				<img src="/pfp/<?php echo $usern ?>.png" class="avatar-img">
				<div>
					<div><b>
						<a class="link" href="/user.php?id=<?php echo $usern ?>">
							<?php echo $usern ?>
						</a>
					</b>
					</div>
				</div>
			</div>
			<div><b>Power</b>: <?php echo $rr ?>%</div>
		</div>	
<?php 	}	
 	}

	get_handler();       
?>
	
<?php
   	page_footer();
?>