class.reddit.php

<?php
	class reddit {

		private $subreddit		= array();
		private $username		= false;
		private $password		= false;
		private $img			= false;

		public $fileType		= array();
		public $expiration		= false;
		public $mininumUps		= false;
		public $author			= false;
		public $minimumWidth	= false;
		public $minimumHeight	= false;
		public $maximumWidth	= false;
		public $maximumHeight	= false;
		public $minumumFilesize	= false;
		public $maximumFilesize	= false;

		public $saveDir			= false;
		public $tempDir			= false;
		public $data			= array();

		private $prefix			= 'https://www.reddit.com/r/';
		private $suffix			= '/new.json?sort=new';

		public function __construct ($subreddit = false, $username = false, $password = false)
		{
			date_default_timezone_set('Atlantic/Reykjavik');

			$this->tempDir = sys_get_temp_dir();

			$this->setSubreddit($subreddit);
			$this->username = $username;
			$this->password = $password;
		}

		public function setSubreddit ($subreddit)
		{
			if (is_array($subreddit)) {
				foreach ($subreddit as $sr) {
					$this->subreddit[] = $sr;
				}
			} else if ($subreddit) {
				$this->subreddit[] = $subreddit;
			}
		}

		public function scanSubreddits ()
		{
			foreach ($this->subreddit as $sr) {
				if (!in_array($sr, $this->data)) {
					$data = json_decode($this->_download($this->prefix.$sr.$this->suffix));
					if (isset($data->data)) {
						foreach ($data->data->children as $row) {
							$this->data[$sr][] = $row->data;
						}
					}
				}
			}
		}

		public function validate ($row)
		{
			// Correct extension
			if ($this->fileType) {
				$img_name_parts = explode('.', $row->url);
				$img_name_extension = end($img_name_parts);
				if (!in_array($img_name_extension, $this->fileType)) {
					return false;
				}
			}

			// Minimum ups requirement met
			if ($this->mininumUps) {
				if ($row->ups < $this->mininumUps) {
					return false;
				}
			}

			// Only this author
			if ($this->author) {
				if ($row->author != $this->author) {
					return false;
				}
			}

			// File does not exist already
			$img = $this->_download($row->url);
			$img_md5 = md5($img);
			$save_path = $this->saveDir .'/'. $img_md5 .'.'. $img_name_extension;
			$temp_path = $this->tempDir .'/'. $img_md5 .'.'. $img_name_extension;

			if (file_exists($save_path)) {
				return false;
			} else {
				$this->img = $img_md5 .'.'. $img_name_extension;
				file_put_contents($temp_path, $img);

				if (!$this->_validateSize($temp_path)) {
					unlink($temp_path);
					return false;
				}
			}

			return true;
		}

		private function _validateSize ($file)
		{
			if ($this->minimumWidth || $this->minimumHeight || $this->maximumWidth || $this->maximumHeight) {

				list($width, $height) = getimagesize($file);

				if ($this->minimumWidth && $this->minimumWidth > $width) {
					return false;
				}

				if ($this->minimumHeight && $this->minimumHeight > $height) {
					return false;
				}

				if ($this->maximumWidth && $this->maximumWidth < $width) {
					return false;
				}

				if ($this->maximumHeight && $this->maximumHeight < $height) {
					return false;
				}
			}

			if ($this->minimumFilesize || $this->maximumFilesize) {

				$size = filesize($file);

				if ($this->minimumFilesize && $this->minimumFilesize > $size) {
					return false;
				}

				if ($this->maximumFilesize && $this->maximumFilesize < $size) {
					return false;
				}

			}

			return true;
		}

		public function saveWallpaper ($keep)
		{
			if ($this->img) {
				if ($keep) {
					rename($this->tempDir .'/'. $this->img, $this->saveDir .'/'. $this->img);
				} else if (file_exists($this->tempDir .'/'. $this->img)) {
					unlink($this->tempDir .'/'. $this->img);
				}
				$this->img = false;
			} else {
				return false;
			}
			return true;
		}

		public function deleteExpiredWallpaper ()
		{
			if ($this->expiration) {
				foreach (scandir($this->saveDir) as $file) {
					if (strtotime('-'. $this->expiration) > filemtime($this->saveDir .'/'. $file)) {
						unlink($this->saveDir .'/'. $file);
					}
				}
			} else {
				return false;
			}
			return true;
		}

		private function _download ($url)
		{
			// Fix spaces
			$url = str_replace(' ', '%20', $url);

			if (function_exists('curl_version')) {

				$ch = curl_init($url);
				curl_setopt($ch, CURLOPT_RETURNTRANSFER, TRUE);
				curl_setopt($ch, CURLOPT_TIMEOUT, 10);
				curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);
				$return = curl_exec($ch);
				curl_close($ch);

				return $return;
			} else {
				return file_get_contents($url);
			}
		}
	}