From 8cebfb6fae04084dfc6d382163acd42b0b47923f Mon Sep 17 00:00:00 2001
From: flashwave <me@flash.moe>
Date: Wed, 27 Feb 2019 15:05:27 +0100
Subject: [PATCH] Added raw following/followers pages.

---
 public/profile.php      | 32 ++++++++++++++++++++++++++++++++
 src/Users/relations.php | 37 +++++++++++++++++++++++++++++++++++++
 src/Users/user.php      | 10 +++++++++-
 3 files changed, 78 insertions(+), 1 deletion(-)

diff --git a/public/profile.php b/public/profile.php
index b1d38bd3..9000a0c4 100644
--- a/public/profile.php
+++ b/public/profile.php
@@ -99,6 +99,38 @@ switch ($mode) {
         echo file_get_contents($userBackground);
         break;
 
+    case 'following':
+        $userId = (int)($_GET['u'] ?? 0);
+
+        if (!user_exists($userId)) {
+            http_response_code(404);
+            echo tpl_render('user.notfound');
+            break;
+        }
+
+        $followingIds = user_relation_users_from($userId, MSZ_USER_RELATION_FOLLOW);
+
+        foreach ($followingIds as $user) {
+            echo "{$user['user_id']}|{$user['relation_created']}<br>";
+        }
+        break;
+
+    case 'followers':
+        $userId = (int)($_GET['u'] ?? 0);
+
+        if (!user_exists($userId)) {
+            http_response_code(404);
+            echo tpl_render('user.notfound');
+            break;
+        }
+
+        $followerIds = user_relation_users_to($userId, MSZ_USER_RELATION_FOLLOW);
+
+        foreach ($followerIds as $user) {
+            echo "{$user['user_id']}|{$user['relation_created']}<br>";
+        }
+        break;
+
     default:
         $userId = user_find_for_profile($_GET['u'] ?? 0);
 
diff --git a/src/Users/relations.php b/src/Users/relations.php
index bfcfaa1f..c5323949 100644
--- a/src/Users/relations.php
+++ b/src/Users/relations.php
@@ -81,3 +81,40 @@ function user_relation_info(int $userId, int $subjectId): array
     $getRelationInfo->bindValue('subject_id', $subjectId);
     return db_fetch($getRelationInfo);
 }
+
+function user_relation_users(int $userId, int $type, bool $from): array
+{
+    if ($userId < 1 || $type <= MSZ_USER_RELATION_NONE || !user_relation_is_valid_type($type)) {
+        return [];
+    }
+
+    static $getUsers = [];
+
+    if (empty($getUsers[$from])) {
+        $getUsers[$from] = db_prepare(sprintf(
+            '
+                SELECT `%1$s` AS `user_id`, `relation_created`
+                FROM `msz_user_relations`
+                WHERE `%2$s` = :user_id
+                AND `relation_type` = :type
+            ',
+            $from ? 'subject_id' : 'user_id',
+            $from ? 'user_id' : 'subject_id'
+        ));
+    }
+
+    $getUsers[$from]->bindValue('user_id', $userId);
+    $getUsers[$from]->bindValue('type', $type);
+
+    return db_fetch_all($getUsers[$from]);
+}
+
+function user_relation_users_to(int $userId, int $type): array
+{
+    return user_relation_users($userId, $type, false);
+}
+
+function user_relation_users_from(int $userId, int $type): array
+{
+    return user_relation_users($userId, $type, true);
+}
diff --git a/src/Users/user.php b/src/Users/user.php
index 79249195..ab494058 100644
--- a/src/Users/user.php
+++ b/src/Users/user.php
@@ -165,13 +165,21 @@ function user_exists(int $userId): bool
         return false;
     }
 
+    static $exists = [];
+
+    if (isset($exists[$userId])) {
+        return $exists[$userId];
+    }
+
     $check = db_prepare('
         SELECT COUNT(`user_id`) > 0
         FROM `msz_users`
         WHERE `user_id` = :user_id
     ');
+
     $check->bindValue('user_id', $userId);
-    return $check->execute() ? (bool)$check->fetchColumn() : false;
+
+    return $exists[$userId] = (bool)($check->execute() ? $check->fetchColumn() : false);
 }
 
 function user_id_from_username(string $username): int