php-gallery/app/app.php

<?php
namespace App;

class Make {
    /*
    |-------------------------------------------------------------
    | Create Thumbnails
    |-------------------------------------------------------------
    | Default resolution for a preview image is 300px (max-width)
    | ** Not yet implemented **
    |-------------------------------------------------------------
    */
    function thumbnail($image_path, $thumbnail_path, $resolution) {
        try {
            $thumbnail = new \Imagick($image_path);
            $thumbnail->resizeImage($resolution,null,null,1,null);
            $thumbnail->writeImage($thumbnail_path);

            return "success";
        } catch (\Exception $e) {
            return $e;
        }
    }

    /*
        Clean up long text input and turn into an array for tags

        Returns clean string of words with equal white space between it
    */
    function tags($string) {
        // Replace hyphens
        $string = str_replace('-', '_', $string);
        // Regex
        $string = preg_replace('/[^A-Za-z0-9\_ ]/', '', $string);
        // Change to lowercase
        $string = strtolower($string);
        // Removing extra spaces
        $string = preg_replace('/ +/', ' ', $string);
    
        return $string;
    }
}

class Account {
    /*
        Check if user is loggedin

        Returns True if user is
        Returns False if user is NOT
    */
    function is_loggedin() {
        if (isset($_SESSION["loggedin"]) && $_SESSION["loggedin"] === true) {
            return True;
        } else {
            return False;
        }
    }
    /*
        Get full user info from database

        Returns array with user info
    */
    function get_user_info($conn, $id) {
        // Setting SQL query
        $sql = "SELECT id, username FROM users WHERE id = ".$id;
        // Getting results
        $query = mysqli_query($conn, $sql);
        // Fetching associated info
        $user_array = mysqli_fetch_assoc($query);
    
        return($user_array);
    }
    /*
        Check if user is admin

        Returns True if user is privilaged
        Returns False if user is NOT privilaged
    */
    function is_admin($conn, $id) {
        if (isset($id) || !empty($id)) {
            // Setting SQL query
            $sql = "SELECT admin FROM users WHERE id = ".$id;
            // Getting results
            $query = mysqli_query($conn, $sql);
            // Fetching associated info
            $user_array = mysqli_fetch_assoc($query);

            if ($user_array['admin'] || $id == 1) {
                return True;
            } else {
                return False;
            }
        } else {
            return False;
        }
    }
    /*
        Get target IP, used for logging
    */
    function get_ip() {
        if (!empty($_SERVER['HTTP_CLIENT_IP'])) {
            $target_ip = $_SERVER['HTTP_CLIENT_IP'];
        } elseif (!empty($_SERVER['HTTP_X_FORWARDED_FOR'])) {
            $target_ip = $_SERVER['HTTP_X_FORWARDED_FOR'];
        } else {
            $target_ip = $_SERVER['REMOTE_ADDR'];
        }

        return $target_ip;
    }
}

class Image {
    /*
    Get full image info from database

    Returns array with image info
    */
    function get_image_info($conn, $id) {
        // Setting SQL query
        $sql = "SELECT * FROM images WHERE id = ".$id;
        // Getting results
        $query = mysqli_query($conn, $sql);
        // Fetching associated info
        $image_array = mysqli_fetch_assoc($query);
    
        return($image_array);
    }
    /*
    Check if user is image owner

    Returns True if user is privilaged
    Returns False if user is NOT privilaged
    */
    function image_privilage($id) {
        $session_id = $_SESSION['id'];
        if (isset($session_id) || !empty($session_id)) {
            if ($session_id == $id) {
                return True;
            } else {
                return False;
            }
        } else {
            return False;
        }
    }
}

class Diff {
    function time($past_time, $full_date = false) {
        $now = new \DateTime;
        $ago = new \DateTime($past_time);
        $diff = $now->diff($ago);

        $diff->w = floor($diff->d / 7);
        $diff->d -= $diff->w * 7;

        $string = array(
            'y' => 'year',
            'm' => 'month',
            'w' => 'week',
            'd' => 'day',
            'h' => 'hour',
            'i' => 'minute',
            's' => 'second',
        );
        foreach ($string as $k => &$v) {
            if ($diff->$k) {
                $v = $diff->$k . ' ' . $v . ($diff->$k > 1 ? 's' : '');
            } else {
                unset($string[$k]);
            }
        }

        if (!$full_date) $string = array_slice($string, 0, 1);
        return $string ? implode(', ', $string) . ' ago' : 'just now';
    }
}