Cache poster images

app/base/BaseModel.php

@@ -35,5 +35,52 @@ class BaseModel {
 	{
 		return "{$this->base_url}{$path}";
 	}
+
+	/**
+	 * Get the path of the cached version of the image. Create the cached image
+	 * if the file does not already exist
+	 *
+	 * @param string $api_path - The original image url
+	 * @param string $series_slug - The part of the url with the series name, becomes the image name
+	 * @param string $type - Anime or Manga, controls cache path
+	 * @return string - the frontend path for the cached image
+	 */
+	public function get_cached_image($api_path, $series_slug, $type="anime")
+	{
+		$path_parts = explode('?', basename($api_path));
+		$path = current($path_parts);
+		$ext_parts = explode('.', $path);
+		$ext = end($ext_parts);
+
+		$cached_image = "{$series_slug}.{$ext}";
+		$cached_path = __DIR__ . "/../../public/cache/{$type}/{$cached_image}";
+
+		// Cache the file if it doesn't already exist
+		if ( ! file_exists($cached_path))
+		{
+			if (ini_get('allow_url_fopen'))
+			{
+				copy($api_path, $cached_path);
+			}
+			elseif (function_exists('curl_init'))
+			{
+				$ch = curl_init($api_path);
+				$fp = fopen($cached_path, 'wb');
+				curl_setopt_array($ch, [
+					CURLOPT_FILE => $fp,
+					CURLOPT_HEADER => 0
+				]);
+				curl_exec($ch);
+				curl_close($ch);
+				fclose($ch);
+			}
+			else
+			{
+				throw new Exception("Couldn't cache images because they couldn't be downloaded.");
+			}
+		}
+
+		return "/public/cache/{$type}/{$cached_image}";
+	}
 }
 // End of BaseModel.php

app/models/AnimeModel.php

@@ -116,7 +116,14 @@ class AnimeModel extends BaseModel {
 			throw new Exception($response->getEffectiveUrl());
 		}
 
-		return $response->json();
+		$output = $response->json();
+
+		foreach($output as &$row)
+		{
+			$row['anime']['cover_image'] = $this->get_cached_image($row['anime']['cover_image'], $row['anime']['slug'], 'anime');
+		}
+
+		return $output;
 	}
 
 	private function sort_by_name(&$array)

app/models/MangaModel.php

@@ -83,10 +83,13 @@ class MangaModel extends BaseModel {
 			$manga_data[$manga['id']] = $manga;
 		}
 
-		foreach($raw_data['manga_library_entries'] as $entry)
+		foreach($raw_data['manga_library_entries'] as &$entry)
 		{
 			$entry['manga'] = $manga_data[$entry['manga_id']];
 
+			// Cache poster images
+			$entry['manga']['poster_image'] = $this->get_cached_image($entry['manga']['poster_image'], $entry['manga_id'], 'manga');
+
 			switch($entry['status'])
 			{
 				case "Plan to Read":