Test reverse lookup with no leading zeros

src/service/FilenameParser.js

@@ -37,6 +37,27 @@ const namePos = {
 	dn: 2
 };
 
+/**
+ * Remove leading zeroes
+ * from canvas and image file
+ * name segments (parts)
+ * @see getCanvasName()
+ * @see ManifestBuilder.getImageName()
+ * @param {String} segment 
+ */
+const normaliseSegment = (segment) => {
+    segment.replaceAll(/^([a-z]+)?0*(\d+)/ig, '$1$2');
+}
+/**
+ * Normalize a full canvas name
+ * @param {String} name 
+ */
+const normaliseName = (name) => {
+    // Account for separate parts in name
+    // and rejoin them after normalisation
+    name.split('&').map(normaliseSegment).join('&');
+}
+
 /**
  * @param {string} imgFilename 
  * @returns {ParsedMetadata}
@@ -180,15 +201,31 @@ export function getCanvasName(imgFilename, technique) {
 		canvasName += imgFilename.split('_')[3].replace(/\..*$/,'');
 	}
 
-    // Check if name is of `fr01&02` type...
-    let names = canvasName.split('&');
+	return normaliseName(canvasName);
+}
+/**
+ * Get image name for given canvas
+ * @param {Canvas} canvas The Canvas object
+ * @returns {string}
+ */
+async function getImageName(canvas) {
+    const images = await getImageList(canvas.resourceId);
+    let adjustedCanvasName = canvas.name;
 
-    // Remove leading zeroes everywhere
-    names = names.map(name => name.replaceAll(/^([a-z]+)?0*(\d+)/ig, '$1$2'));
-    // Rejoin if needed...
-    canvasName = names.join('&');
+	// Adjust canvas name for HSI with PCA...
+	if (/pc(1|3)/.test(canvas.name)) {
+		adjustedCanvasName = canvas.name.replace(
+			/pc((1|3))/,
+			function (match, group1) {
+				return `_HSI_PC${group1}`;
+			}
+		);
+	}
 
-	return canvasName;
+	return images.filter(i => {
+        const segment = i.split('_')[namePos[canvas.technique]];
+        return normaliseName(segment) === adjustedCanvasName;
+    });
 }
 /**
  * Generate canvas label from canvasName

src/service/ManifestBuilder.js

@@ -52,7 +52,7 @@ export async function buildManifest(manifestId) {
 export async function buildCanvas(manifestId, name) {
 	const manifest = new Manifest(IIIF_API_VERSION, BASE_URL);
 	manifest.generateID(manifestId);
-	let filename = await getImageName(name, manifestId);
+	let filename = await getImageName(name, manifest);
 
 	return createCanvas(manifest, filename);
 }
@@ -143,7 +143,6 @@ async function populateCanvases (manifest, images) {
 }
 /**
  * Get image name for given canvas
- * @todo Use regex in filter!!
  * @param {String} name The canvas name
  * @param {String} manifestId The manifest (resource) id
  * @returns {string}