Generate proper labels for Canvas resources

controllers/canvas.mjs

@@ -1,8 +1,11 @@
 import Canvas from '../src/Canvas.js';
 import Image from '../src/Image.js';
+import Manifest from '../src/Manifest.js';
 import Common from '../src/common.js';
 /**
  * Generate a canvas object to serve
+ * @todo Use createCanvas from Common?
+ * @todo Pass a Manifest object, not a manifest id
  * @param {string} manifestId The corresponding manifest's id
  * @param {number|string} name The canvas name 
  */
@@ -11,8 +14,19 @@ export default async function generateCanvas(manifestId, name) {
 	const BASE_URL = process.env.BASE_URL;
 
 	const canvas = new Canvas(IIIF_API_VERSION, BASE_URL);
+	const manifest = new Manifest(IIIF_API_VERSION, BASE_URL);
+	manifest.generateID(manifestId);
+
 	canvas.generateID(manifestId, name);
-	canvas.label = `${manifestId}-${name.toLowerCase()}`;
+	let label = name
+		.replace(/c(\w{1,2})0+(\d+).*(\.\w{2,3})?$/i, function (str, c, number) {
+			return `C${c}. ${number}`;
+		});
+	// Add PCA to canvas label for HSI images
+	if (manifest.technique === 'hsi') {
+		label += ` ${filename.split('_')[3].replace(/\..*$/,'')}`;
+	}
+	canvas.label = label;
 
 	const image = new Image(canvas.id);
 	image.generateID(process.env.IMAGE_SERVER_URL, await Common.getImageName(canvas));