From 75ce4bb01270f0652625fad0d3c7bc5fdc147fee Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Nicol=C3=B2=20P?= <nicolo.paraciani@cnr.it>
Date: Tue, 17 Oct 2023 14:54:20 +0200
Subject: [PATCH] Support sequence URLs

---
 controllers/sequence.mjs | 26 ++++++++++++++++++++++++++
 routes/index.mjs         |  9 +++++++++
 2 files changed, 35 insertions(+)
 create mode 100644 controllers/sequence.mjs

diff --git a/controllers/sequence.mjs b/controllers/sequence.mjs
new file mode 100644
index 0000000..9f6de31
--- /dev/null
+++ b/controllers/sequence.mjs
@@ -0,0 +1,26 @@
+'use strict';
+
+import Manifest from '../src/Manifest.js';
+import Common from '../src/common.js';
+
+/**
+ * Generate a sequence object to serve
+ * @param {string} manifestId 
+ * @param {string | int} name 
+ */
+export default async function generateSequence(manifestId, name) {
+	const IIIF_API_VERSION = process.env.IIIF_API_VERSION;
+	const BASE_URL = process.env.BASE_URL;
+
+	let manifest = new Manifest(IIIF_API_VERSION, BASE_URL);
+	manifest.generateID(manifestId);
+	
+	manifest = await Common.populateCanvases(
+		manifest, 
+		await Common.getImageList(manifestId), 
+		manifestId
+	);
+
+    return manifest.toObject().sequences[name];
+}
+
diff --git a/routes/index.mjs b/routes/index.mjs
index eac26a3..6d58d0f 100644
--- a/routes/index.mjs
+++ b/routes/index.mjs
@@ -1,5 +1,6 @@
 import generateManifest from '../controllers/manifest.mjs';
 import generateCanvas from '../controllers/canvas.mjs';
+import generateSequence from '../controllers/sequence.mjs';
 import express from 'express';
 
 let router = express.Router();
@@ -18,4 +19,12 @@ router.get('/iiif/:manifestid/canvas/:name', async function(req, res) {
 	res.json(canvas);
 });
 
+/* GET sequence JSON */
+router.get('/iiif/:manifestid/sequence/:name', async function(req, res) {
+	const sequence = await generateSequence(req.params.manifestid, req.params.name)
+	res.set('Access-Control-Allow-Origin', '*');
+	res.json(sequence);
+});
+
+
 export default router;