cache formats supported by imagick

turns out this can be quite slow

Signed-off-by: Robin Appelman <robin@icewind.nl>

1 files changed, 40 insertions, 0 deletions

diff --git a/lib/private/Preview/IMagickSupport.php b/lib/private/Preview/IMagickSupport.php
new file mode 100644
index 00000000000..e22ae93ab94
--- /dev/null
+++ b/lib/private/Preview/IMagickSupport.php
@@ -0,0 +1,40 @@
+<?php
+
+namespace OC\Preview;
+
+use OCP\ICache;
+use OCP\ICacheFactory;
+
+class IMagickSupport {
+	private ICache $cache;
+	private ?\Imagick $imagick;
+
+	public function __construct(ICacheFactory $cacheFactory) {
+		$this->cache = $cacheFactory->createLocal('imagick');
+
+		if (extension_loaded('imagick')) {
+			$this->imagick = new \Imagick();
+		} else {
+			$this->imagick = null;
+		}
+	}
+
+	public function hasExtension(): bool {
+		return !is_null($this->imagick);
+	}
+
+	public function supportsFormat(string $format): bool {
+		if (is_null($this->imagick)) {
+			return false;
+		}
+
+		$cached = $this->cache->get($format);
+		if (!is_null($cached)) {
+			return $cached;
+		}
+
+		$formatSupported = count($this->imagick->queryFormats($format)) === 1;
+		$this->cache->set($format, $cached);
+		return $formatSupported;
+	}
+}