railpage/railpagecore

<?php

/**
 * FWlink class
 * @since Version 3.8.6
 * @package Railpage
 * @author Michael Greenhill
 */

namespace Railpage;

use Railpage\AppCore;
use Exception;

/**
 * FWlink class
 */

class fwlink extends AppCore {
    
    /**
     * Link ID
     * @since Version 3.8.6
     * @var int $id
     */
    
    public $id;
    
    /**
     * Original URL
     * @since Version 3.8.6
     * @var string $url
     */
    
    public $url;
    
    /**
     * Canonical URL
     * @since Version 3.8.6
     * @var string $url_canonical
     */
    
    public $url_canonical;
    
    /**
     * Short URL
     * @since Version 3.8.6
     * @var string $url_short
     */
    
    public $url_short;
    
    /**
     * Title
     * @since Version 3.7.6
     * @var string $title
     */
    
    public $title;
    
    /**
     * Memcached ID 
     * @since Version 3.9.1
     * @var string $mckey
     */
    
    public $mckey = NULL;
    
    /**
     * Constructor
     * @since Version 3.8.6
     * @param int|string $id
     */
    
    public function __construct($id = null) {
        
        parent::__construct();
        
        if ($id !== null && !filter_var($id, FILTER_VALIDATE_INT)) {
            $query = "SELECT id FROM fwlink WHERE url = ?";
            $newid = $this->db->fetchOne($query, $id);
            
            if (filter_var($newid, FILTER_VALIDATE_INT)) {
                $id = $newid;
            }
        }
        
        if (filter_var($id, FILTER_VALIDATE_INT)) {
            $this->id = $id; 
            $this->load(); 
            
            if (!empty($this->url)) {
                $this->makeURLs(); 
            }
        }
    
    }
    
    /**
     * Populate this object
     * @since Version 3.9.1
     * @return void
     */
    
    private function load() {
        $this->mckey = sprintf("railpage:fwlink=%s", md5($this->id));
        
        if (!$row = $this->Memcached->fetch($this->mckey)) {
            
            $query = "SELECT * FROM fwlink WHERE id = ?";
        
            $row = $this->db->fetchRow($query, $this->id);
            
        }
        
        if (!isset($row) || !count($row)) {
            return;
        }
        
        $this->id = $row['id']; 
        $this->url = $row['url'];
        $this->title = $row['title'];
        
        $this->Memcached->save($this->mckey, $row, 86400 * 30);
            
        return;
        
    }
    
    /**
     * Make extra URLs
     * @since Version 3.9.1
     * @return void
     */
    
    private function makeURLs() {
        $this->url_canonical = sprintf("http://%s%s", RP_HOST, $this->url);
        $this->url_short = sprintf("http://%s/go/%d", "railpage.com.au", $this->id);
    }
    
    /**
     * Return the short URL
     * @since Version 3.8.6
     * @return string
     */
    
    public function __toString() {
        return !empty($this->url_short) ? $this->url_short : "";
    }
    
    /**
     * Validate changes to this URL
     * @since Version 3.8.6
     * @return boolean
     */
    
    public function validate() {
        if (is_object($this->url)) {
            $this->url = strval($this->url);
        }
        
        if (empty($this->url) || !is_string($this->url)) {
            throw new Exception("Cannot validate new link - \$url is empty or not a string"); 
        }
        
        if (empty($this->title) || !is_string($this->title)) {
            throw new Exception("Cannot validate new link - \$title is empty or not a string"); 
        }
        
        return true;
    }
    
    /**
     * Commit changes to this URL
     * @since Version 3.8.6
     * @return boolean
     */
     
    public function commit() {
        
        $this->validate(); 
        
        $data = array(
            "url" => $this->url,
            "title" => $this->title
        );
        
        $this->Memcached->delete($this->mckey); 
        
        // Insert
        if (!filter_var($this->id, FILTER_VALIDATE_INT)) {
            $this->db->insert("fwlink", $data); 
            $this->id = $this->db->lastInsertId(); 
            
            $this->makeURLs(); 
            return true;
        }
        
        // Update
        $where = array(
            "id = ?" => $this->id
        );
        
        $this->db->update("fwlink", $data, $where); 
        
        $this->makeURLs(); 
        
        return true;
        
    }
    
}