/dupes.php

<?php

if (($_POST['playlist'] > '') || ($_POST['tracks'] > '')) { // checks that at least one field is filled out

	$correct_format = false;

	$starred = false;

	$playlist_empty = true;

	$message = '';

	$playlist = Array(

				'Name' => "",

				'Tracks' => Array(

					'Names' => Array(""),

					'Addresses' => Array(""),

					'Duration' => Array(0)

					)

				);



	if ($_POST['playlist'] > '') {

		$pl_input = trim($_POST['playlist']);

		if (correctPlaylistFormat($pl_input)) {

			$playlist_empty = false;		

			$correct_format = true;

			$playlist_uri = getPlaylistURI($pl_input); 			// returns a Spotify playlist URI: spotify:user:<user>:playlist:<uri>

			$playlist = playlistGetSpotifyURIs($playlist_uri);	// get the list of names, addresses (URIs) and duration

			if (count($playlist['Tracks']['Addresses']) > 1000) {

				echo '<div class="warning">The playlist option  (top) will only accept 1000 tracks from your playlist. If your list has more than 1000 tracks, please use the bottom option.<br/><br/>

						Tip: Alternativly use the <a href="split/">split up</a> feature to split up your playlist into lists of maximum 1000 tracks (make sure you sort your playlist alphabetically first).</div><br/>';

			}

		}

	} elseif ($_POST['tracks'] > '') {

		$tracks = $_POST['tracks'];

		if (correctTracksFormat($tracks)) {

			$correct_format = true;

			$list = preg_split('/[\n\r]+/',$tracks); 	// get rid of

			$list = array_filter($list,'strlen');		// garbage

			$playlist['Tracks']['Addresses'] = tracksGetSpotifyURIs($list); // returns an array of Spotif URIs: spotify:track:<URI>

		}

	}

	

	if ($correct_format) {

		if ($tracks = findDupes($playlist['Tracks'])) {			// returns false if there are no dupes, else returns the dupes

			$new_playlist = removeDupes($playlist['Tracks']);	// create a new playlist without dupes 

			if ($playlist['Name'] > "") {

				echo "<h3>Results for '".$playlist['Name']."'</h3><br/>";

			} else {

				echo "<h3>Results</h3><br/>";

			}

			$count_removed = count($playlist['Tracks']['Addresses'])- count($new_playlist['Addresses']); // number of tracks removed from new playlist

			if ($count_removed > 0) {

				echo "<b>New playlist (".count($new_playlist['Addresses'])." tracks - ".$count_removed." duplicates removed):</b></p>

					<textarea name='newlist' rows='10' cols='52' onClick='select(this)' wrap='off' readonly>";

			// List the new playlist..

				foreach ($new_playlist['Addresses'] as $uri) {

					echo $uri."\r\n";

				}

				echo "</textarea><br/>

					<p>

						<i>Select the tracks by clicking inside the textarea and use CTRL-C or right click to copy, or just drag them to an empty playlist.  - Will reset the tracks' added date.</i><br/>&nbsp;<br/>

					</p>";

		// ..unless no dupes were removed

			} //if ($count_removed > 0) 

			else {

				echo "<br/>No duplicates removed; no new playlist generated.<br/><br/>";

			}

			

    		echo "<p><br/><b>Duplicates as tracks (".count($tracks['Addresses'])." tracks):</b></p>

				<textarea name='newlist' rows='6' cols='52' onClick='select(this)' wrap='off' readonly>";



			// List the dupes by track USI

            foreach ($tracks['Addresses'] as $uri) {

				echo $uri."\r\n";

			}

			echo "</textarea><br/>

				<p>

					<i>Select the tracks by clicking inside the textarea and use CTRL-C or right click to copy, or just drag them to an empty playlist.</i>

					<br/>&nbsp;<br/>

				</p>";

                    

		// embed or ws.spotify.com down? If so, let the user know

			if (isset($tracks['Names']) && preg_match('/<i>/',$tracks['Names'][0])) {

				$message = $tracks['Names'][0].'<br/><br/>'; 

			} else {

				if ($playlist_empty) {

				    $tracks = tracksGetTrackNames($tracks);			// gets the track names by looking up the URIs against the API

		    	}

				$rows = count($tracks['Addresses'])+1;

				echo "<p>&nbsp;<br/>

						<b>Duplicates by track name and artist (".count($tracks['Addresses'])." tracks):</b><br/><br/>

						<textarea name='newlist' rows='".$rows."' cols='52' wrap='off' readonly>";

/*

				if ($testSocket = @fsockopen("ws.spotify.com", 80, $errno, $errstr, 2)) {

					foreach ($tracks['Addresses'] as $i => $dupe) {

						if(preg_match('/:local:/', $dupe)) {

							$tracks['Names'][$i] = getLocalTrackName($dupe);

						} else {

							$url = trim("http://ws.spotify.com/lookup/1/?uri=".$dupe);

							$content = file_get_contents($url);

							if ($content) {

								$doc = new SimpleXmlElement($content); 

								echo $doc->name." by ".$doc->artist->name.'&#13;';

							} else {

								echo "Error looking up in the Spotify API";

							}

						}

					}

					fclose($testSocket); 

				} else { 

					$tracks['Names'][0] = '&nbsp;<br/><i>Unfortunately it\'s not possible to lookup tracknames at this time (Spotify site down), please try again later.</i>';

					$tracks['Addresses'][0] = '999';

				}

*/



			// List the dupes by name and artist

				if (!isset($tracks['Names'])) {

					echo 	"Something happened looking up the track names. \r\n

							Try refreshing the page.";

				} else {

					foreach ($tracks['Names'] as $name) {

						if (preg_match('/\* /',$name)) { 		// check if the track is starred

							$starredTracks[] = $name;

							$starred = true;					// ah, need to display special message later

						} else{

							echo $name."\n";

						}

					}

					if ($starred) {

						echo "\nPossible dupes (not removed from the new playlist):\n";

						foreach ($starredTracks as $name) {

							echo $name."\n";

						}

					}

				}



				echo "</textarea><br/><br/>".$message; 	// display error message (I should make this an array *notes*)

				echo "<br/><i>Sort your playlist alphabetically or use the filter function (ctrl-f) to find the tracks easily.</i><br/><br/>

					</p>";

			}

		} else {

			$message = "<p>&nbsp;<br/>No duplicates found</p>";

		}

	} else {

		$message = "<p>&nbsp;<br/>Please apply valid playlist (top field) or tracks (bottom field) by HTTP or Spotify URI.</p>";

	}

	echo $message;

}	

?>