2oakjq
Last Updated: February 25, 2016
·
4.701K
· tonyrain

Retrieving photo albums from vk.com

The task was to get all photos from group albums.

First of all I needed PHP VKApi class. You can find it here: <a href="https://github.com/vladkens/VK" target="blank">vk api</a>.
The second thing I'd done was to read vk.com API docs <a href="http://vk.com/pages?oid=-1&p=%D0%9E%D0%BF%D0%B8%D1%81%D0%B0%D0%BD%D0%B8%D0%B5
%D0%BC%D0%B5%D1%82%D0%BE%D0%B4%D0%BE%D0%B2API" target="blank">here</a>. I need the photos section of this docs.

To build an vk app with that php vk-api class you need:

define('APP_ID', 'YOUR_APP_ID');
define('APP_SECRET', 'YOUR_APP_SECRET_KEY');

require_once('./libs/VK.php');

$vk = new \VK\VK(APP_ID, APP_SECRET);

The next I wanted is to make it works OOP-style. I've created two classes called Photo and Album. Here they are:

class Photo {
    private $id;
    private $src;
    private $srcBig;
    private $title;
    private $createdAt;

    public function __construct($id = -1, $src = 'unknown', $srcBig = 'unknown', $title = 'unknown', $createdAt = -1){
        $this->id = $id;
        $this->src = $src;
        $this->srcBig = $srcBig;
        $this->title = $title;
        $this->createdAt = $createdAt;
    }

    public function getId(){
        return $this->id;
    }

    public function setId($id){
        $this->id = $id;
    }

    public function getSrc(){
        return $this->src;
    }

    public function setSrc($src){
       $this->src = $src;
    }

    public function getSrcBig(){
        return $this->srcBig;
    }

    public function setSrcBig($srcBig){
        $this->srcBig = $srcBig;
    }

    public function getTitle(){
        return $this->title;
    }

    public function setTitle($title){
        $this->title = $title;
    }

    public function getCreatedAt(){
        return $this->createdAt;
    }

    public function setCreatedAt($createdAt){
        $this->createdAt = $createdAt;
    }
} 
class Album {
    private $id;
    private $thumbId;
    private $title;
    private $description;
    private $createdAt;
    private $updatedAt;
    private $size;
    private $photoList;

    public function __construct($id = -1, $thumbId = -1, $title = 'unknown', $description = 'unknown', $createdAt = -1, $updatedAt = -1, $size = 0, $photoList = array()){
        $this->id = $id;
        $this->thumbId = $thumbId;
        $this->title = $title;
        $this->description = $description;
        $this->createdAt = $createdAt;
        $this->updatedAt;
        $this->size = $size;
        $this->photoList = $photoList;
    }

    public function getId(){
        return $this->id;
    }

    public function setId($id){
        $this->id = $id;
    }

    public function getThumbId(){
        return $this->thumbId;
    }

    public function setThumbId($thumbId){
        $this->thumbId = $thumbId;
    }

    public function getTitle(){
        return $this->title;
    }

    public function setTitle($title){
        $this->title = $title;
    }

    public function getDescription(){
        return $this->description;
    }

    public function setDescription($description){
        $this->description = $description;
    }

    public function getCreatedAt(){
        return $this->createdAt;
    }

    public function setCreatedAt($createdAt){
        $this->createdAt = $createdAt;
    }

    public function getUpdatedAt(){
        return $this->updatedAt;
    }

    public function setUpdatedAt($updatedAt){
        $this->updatedAt = $updatedAt;
    }

    public function getSize(){
        return $this->size;
    }

    public function setSize($size){
        $this->size = $size;
    }

    public function getPhotoList(){
        return $this->photoList;
    }

    public function setPhotoList($photoList){
        $this->photoList = $photoList;
    }
} 

After this manipulations, I needed some converter from vk-api response to my OOP-model. And the code below is for this manipulations:

class Converter {
    public static function convertToAlbum($response){
        try{
            $album = new Album();

            $album->setId($response['aid']);
            $album->setThumbId($response['thumb_id']);
            $album->setTitle($response['title']);
            $album->setDescription($response['description']);
            $album->setCreatedAt($response['created']);
            $album->setUpdatedAt($response['updated']);
            $album->setSize($response['size']);

            return $album;
        } catch(Exception $ex) {
            throw new $ex;
        }
    }

    public static function convertToAlbums($response){
        try{
            $albums = array();

            foreach ($response as $r){
                $albums[] = self::convertToAlbum($r);
            }

            return $albums;
        } catch (Exception $ex) {
            throw new $ex;
        }
    }

    public static function convertToPhoto($response){
        try{
            $photo = new Photo();

            $photo->setId($response['pid']);
            $photo->setSrc($response['src']);
            $photo->setSrcBig($response['src_xxbig']);
            $photo->setTitle($response['text']);
            $photo->setCreatedAt($response['created']);

            return $photo;
        } catch(Exception $ex) {
            throw new $ex;
        }
    }

    public static function convertToPhotos($response){
        try{
            $photos = array();

            foreach ($response as $r){
                $photos[] = self::convertToPhoto($r);
            }

            return $photos;
        } catch(Exception $ex) {
            throw new $ex;
        }
    }
} 

Okay, we've already done Photo, Album and Converter classes. It's time to use this and find out what it can do for us.

define('GROUP_ID', 'YOUR_GROUP_ID');
define('APP_ID', 'YOUR_APP_ID');
define('APP_SECRET', 'YOUR_APP_SECRET_KEY');

require_once('./libs/VK.php');
require_once('./logic/Album.php');
require_once('./logic/Photo.php');
require_once('./logic/Converter.php');

$vk = new \VK\VK(APP_ID, APP_SECRET);

$model = array();

$albumsResponse = $vk->api('photos.getAlbums', array(
    'gid' => GROUP_ID
));

$albums = $albumsResponse['response'];

foreach ($albums as $a){
    $album = Converter::convertToAlbum($a);

    $photosResponse = $vk->api('photos.get', array(
        'gid' => GROUP_ID,
        'aid' => $album->getId()
    ));

    $photos = $photosResponse['response'];

    $album->setPhotoList(Converter::convertToPhotos($photos));

    $model[] = $album;
}

}

And now, in our variable $model we have full list of albums with photos, titles and other info from your vk.com group.