From 7069268db096ab0aa7a8839a3594efb2d1be8f86 Mon Sep 17 00:00:00 2001
From: "(quasar) nebula" <qznebula@protonmail.com>
Date: Mon, 4 Sep 2023 20:46:58 -0300
Subject: thumbs: new check-has-thumbs util, others throw for missing info

---
 src/gen-thumbs.js | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

(limited to 'src/gen-thumbs.js')

diff --git a/src/gen-thumbs.js b/src/gen-thumbs.js
index 51b2c72d..741cdff3 100644
--- a/src/gen-thumbs.js
+++ b/src/gen-thumbs.js
@@ -168,11 +168,23 @@ getThumbnailsAvailableForDimensions.all =
     .map(([name, {size}]) => [name, size])
     .sort((a, b) => b[1] - a[1]);
 
+export function checkIfImagePathHasCachedThumbnails(imagePath, cache) {
+  // Generic utility for checking if the thumbnail cache includes any info for
+  // the provided image path, so that the other functions don't hard-code the
+  // cache format.
+
+  return !!cache[imagePath];
+}
+
 export function getDimensionsOfImagePath(imagePath, cache) {
   // This function is really generic. It takes the gen-thumbs image cache and
   // returns the dimensions in that cache, so that other functions don't need
   // to hard-code the cache format.
 
+  if (!cache[imagePath]) {
+    throw new Error(`Expected imagePath to be included in cache, got ${imagePath}`);
+  }
+
   const [width, height] = cache[imagePath].slice(1);
   return [width, height];
 }
@@ -185,6 +197,10 @@ export function getThumbnailEqualOrSmaller(preferred, imagePath, cache) {
   // one which is being thumbnail-ified, this just returns the name of the
   // selected thumbnail size.
 
+  if (!cache[imagePath]) {
+    throw new Error(`Expected imagePath to be included in cache, got ${imagePath}`);
+  }
+
   const {size: preferredSize} = thumbnailSpec[preferred];
   const [width, height] = getDimensionsOfImagePath(imagePath, cache);
   const available = getThumbnailsAvailableForDimensions([width, height]);
-- 
cgit 1.3.0-6-gf8a5