Expose manifest params JSON

src/common.js

@@ -43,6 +43,24 @@ function extractDNOMetadata(imgFilename) {
 		date: '',
 	}
 }
+/**
+ * Retrieves available image techniques
+ * for all papyruses based on folder contents
+ * @returns {object}
+ */
+Common.getParamsFromFolders = async function() {
+	let params = {};
+	const papyri = await fs.promises.readdir(process.env.IMAGES_DIR);
+
+	for (let p of papyri) {
+		params[p] = [];
+		for (let tech of await fs.promises.readdir(`${process.env.IMAGES_DIR}/${p}`)) {
+			params[p].push(tech.toLowerCase().replaceAll('_','-'));
+		}
+	}
+
+	return params;
+}
 /**
  * @param {string} manifestId 
  */