feat: Add statistics to about page

html/about/index.php

@@ -2,8 +2,14 @@
 
 require_once __DIR__ . '/../../core.php';
 
+require_once __DIR__ . '/../../lib/stats.php';
+
+$stats = getStatistics();
+$mobStats = getMobStats();
+
+
 $title = "MobMash - About";
-$content = function () {
+$content = function () use ($stats, $mobStats) {
     require __DIR__ . '/../../view/pages/about.php';
 };
 

lib/stats.php

@@ -0,0 +1,86 @@
+<?php
+
+require_once __DIR__ . '/rating.php';
+
+function getStatistics(): array {
+    global $pdo;
+
+    $query = $pdo->query(<<<EOF
+        SELECT 
+            max(c) AS max, 
+            min(c) AS min, 
+            avg(c) AS avg,
+            count(c) AS voters
+        FROM (
+            SELECT 
+                count(*) AS c
+            FROM mm_matches 
+            WHERE session IS NOT NULL GROUP BY session
+        ) AS c;
+    EOF
+    );
+
+    $query->setFetchMode(PDO::FETCH_ASSOC);
+
+    $result = $query->fetch();
+
+    $query = $pdo->query("SELECT count(*) AS votes FROM mm_matches");
+    $query->setFetchMode(PDO::FETCH_ASSOC);
+
+    $result = array_merge($result, $query->fetch());
+
+    $query = $pdo->query("SELECT count(*) AS mobs FROM mm_mobs");
+    $query->setFetchMode(PDO::FETCH_ASSOC);
+
+    $result = array_merge($result, $query->fetch());
+
+    $query = $pdo->query(<<<EOF
+        SELECT 
+            count(*) AS maxed_out
+        FROM (
+            SELECT 
+                count(*) AS c 
+            FROM mm_matches 
+            WHERE session IS NOT NULL
+            GROUP BY session
+        ) AS c
+        WHERE c.c >= power((SELECT count(*) FROM mm_mobs), 2);
+    EOF
+    );
+    $query->setFetchMode(PDO::FETCH_ASSOC);
+
+    $result = array_merge($result, $query->fetch());
+
+    return $result;
+}
+
+function getMobStats(): array {
+    $mobs = getMobsWithMetaData();
+
+    return [
+        "highest_rating" => array_reduce($mobs,
+            fn($current, $mob) => $mob["rating"] > $current["rating"] ? $mob : $current,
+            $mobs[0]
+        ),
+        "lowest_rating" => array_reduce($mobs,
+            fn($current, $mob) => $mob["rating"] < $current["rating"] ? $mob : $current,
+            $mobs[0]
+        ),
+        "most_matches" => array_reduce($mobs,
+            fn($current, $mob) => $mob["matches"] > $current["matches"] ? $mob : $current,
+            $mobs[0]
+        ),
+        "least_matches" => array_reduce($mobs,
+            fn($current, $mob) => $mob["matches"] < $current["matches"] ? $mob : $current,
+            $mobs[0]
+        ),
+        "most_wins" => array_reduce($mobs,
+            fn($current, $mob) => $mob["wins"] > $current["wins"] ? $mob : $current,
+            $mobs[0]
+        ),
+        "least_wins" => array_reduce($mobs,
+            fn($current, $mob) => $mob["losses"] > $current["losses"] ? $mob : $current,
+            $mobs[0]
+        ),
+    ];
+}

view/pages/about.php

@@ -1,3 +1,8 @@
+<?php
+    $stats ??= [];
+    $mobStats ??= [];
+?>
+
 <h1>About</h1>
 
 <div class="text-container">
@@ -63,6 +68,52 @@
         <a href="https://github.com/overflowerror/mobmash.click">Github</a>. Pull Requests are welcome!
     </p>
 
+    <h2 id="statistics">Statistics</h2>
+
+    <p>
+        There are currently <?= $stats["mobs"] ?> mobs in the system.
+        The top ranked mob is "<?= $mobStats["highest_rating"]["name"] ?>" with a rating of
+        <?= number_format($mobStats["highest_rating"]["rating"]) ?>. Last place is
+        "<?= $mobStats["lowest_rating"]["name"] ?>" with a rating of
+        <?= number_format($mobStats["lowest_rating"]["rating"]) ?>.
+    </p>
+    <p>
+        "<?= $mobStats["most_matches"]["name"] ?>" has fought the most matches:
+        <?= $mobStats["most_matches"]["matches"] ?>, out of which it won <?= $mobStats["most_matches"]["wins"] ?>.
+        <?php if ($mobStats["most_matches"]["id"] == $mobStats["most_wins"]["id"]): ?>
+            Which also makes it the mob with the most wins.
+        <?php else: ?>
+            Speaking of wins: The mob with the most wins is "<?= $mobStats["most_wins"]["name"] ?>" with
+            <?= $mobStats["most_wins"]["wins"] ?> wins out of <?= $mobStats["most_wins"]["matches"] ?> matches.
+        <?php endif ?>
+    </p>
+    <p>
+        Until now, there have been <?= $stats["votes"] ?> votes.
+    </p>
+    <p>
+        Over the past 6 months, there have been <?= $stats["voters"] ?> unique voters. On average, each one voted
+        <?= number_format($stats["avg"], 1) ?> times with <?= $stats["max"] ?> <?= $stats["max"] > 80 ? "(You people are mad!)" : "" ?>
+        as the maximum.
+    </p>
+    <p>
+        <?php
+            if ($stats["maxed_out"] == 0) {
+        ?>
+            So far, none have voted for all <?= $stats["mobs"] * $stats["mobs"] ?> pairings yet. : (
+        <?php
+            } else if ($stats["maxed_out"] == 1) {
+        ?>
+            Coincidentally, that maximum is the highest possible number - this one person voted for every single paring. ^^
+        <?php
+            } else {
+        ?>
+            Coincidentally, that maximum is the highest possible number - <?= $stats["maxed_out"] ?> visitors voted for every
+            single paring. D:
+        <?php
+            }
+        ?>
+    </p>
+
     <h2 id="contact">Contact</h2>
 
     <p>