From b96c25a3afac65bf5b1760c4f5495f848a7fd1a7 Mon Sep 17 00:00:00 2001
From: Ryan Liptak <squeek502@hotmail.com>
Date: Sun, 24 Feb 2019 03:08:34 -0800
Subject: [PATCH] [BandcampBridge] Update to use newer POST API (#1045)

Bandcamp tags pages have a new layout and now use a POST API endpoint to view each page of releases.

Output of this bridge should be almost the same as before, with a few small improvements:
- Small album image in 'content', larger album image in 'enclosures'
- RSS item titles/authors are appended with the releaser in parentheses if the artist name and the releaser are different (i.e. Record Label's Bandcamp releases an album called Bar by the band named Foo, it would get the title 'Foo - Bar (Record Label)' and the author 'Foo (Record Label)')
---
 bridges/BandcampBridge.php | 76 +++++++++++++++++++++++++-------------
 1 file changed, 50 insertions(+), 26 deletions(-)

diff --git a/bridges/BandcampBridge.php b/bridges/BandcampBridge.php
index 9c8d436e..6c75ed5e 100644
--- a/bridges/BandcampBridge.php
+++ b/bridges/BandcampBridge.php
@@ -13,48 +13,72 @@ class BandcampBridge extends BridgeAbstract {
 			'required' => true
 		)
 	));
+	const IMGURI = 'https://f4.bcbits.com/';
+	const IMGSIZE_300PX = 23;
+	const IMGSIZE_700PX = 16;
 
 	public function getIcon() {
 		return 'https://s4.bcbits.com/img/bc_favicon.ico';
 	}
 
 	public function collectData(){
-		$html = getSimpleHTMLDOM($this->getURI())
-			or returnServerError('No results for this query.');
+		$url = self::URI . 'api/hub/1/dig_deeper';
+		$data = $this->buildRequestJson();
+		$header = array(
+			'Content-Type: application/json',
+			'Content-Length: ' . strlen($data)
+		);
+		$opts = array(
+			CURLOPT_CUSTOMREQUEST => 'POST',
+			CURLOPT_POSTFIELDS => $data
+		);
+		$content = getContents($url, $header, $opts)
+			or returnServerError('Could not complete request to: ' . $url);
 
-		foreach($html->find('li.item') as $release) {
-			$script = $release->find('div.art', 0)->getAttribute('onclick');
-			$uri = ltrim($script, "return 'url(");
-			$uri = rtrim($uri, "')");
+		$json = json_decode($content);
 
-			$item = array();
-			$item['author'] = $release->find('div.itemsubtext', 0)->plaintext
-			. ' - '
-			. $release->find('div.itemtext', 0)->plaintext;
+		if ($json->ok !== true) {
+			returnServerError('Invalid response');
+		}
 
-			$item['title'] = $release->find('div.itemsubtext', 0)->plaintext
-			. ' - '
-			. $release->find('div.itemtext', 0)->plaintext;
+		foreach ($json->items as $entry) {
+			$url = $entry->tralbum_url;
+			$artist = $entry->artist;
+			$title = $entry->title;
+			// e.g. record label is the releaser, but not the artist
+			$releaser = $entry->band_name !== $entry->artist ? $entry->band_name : null;
 
-			$item['content'] = '<img src="'
-			. $uri
-			. '"/><br/>'
-			. $release->find('div.itemsubtext', 0)->plaintext
-			. ' - '
-			. $release->find('div.itemtext', 0)->plaintext;
+			$full_title = $artist . ' - ' . $title;
+			$full_artist = $artist;
+			if (isset($releaser)) {
+				$full_title .= ' (' . $releaser . ')';
+				$full_artist .= ' (' . $releaser . ')';
+			}
+			$small_img = $this->getImageUrl($entry->art_id, self::IMGSIZE_300PX);
+			$img = $this->getImageUrl($entry->art_id, self::IMGSIZE_700PX);
 
-			$item['id'] = $release->find('a', 0)->getAttribute('href');
-			$item['uri'] = $release->find('a', 0)->getAttribute('href');
+			$item = array(
+				'uri' => $url,
+				'author' => $full_artist,
+				'title' => $full_title
+			);
+			$item['content'] = "<img src='$small_img' /><br/>$full_title";
+			$item['enclosures'] = array($img);
 			$this->items[] = $item;
 		}
 	}
 
-	public function getURI(){
-		if(!is_null($this->getInput('tag'))) {
-			return self::URI . 'tag/' . urlencode($this->getInput('tag')) . '?sort_field=date';
-		}
+	private function buildRequestJson(){
+		$requestJson = array(
+			'tag' => $this->getInput('tag'),
+			'page' => 1,
+			'sort' => 'date'
+		);
+		return json_encode($requestJson);
+	}
 
-		return parent::getURI();
+	private function getImageUrl($id, $size){
+		return self::IMGURI . 'img/a' . $id . '_' . $size . '.jpg';
 	}
 
 	public function getName(){