Ensuring canvas_id is unique

iiify/resolver.py

@@ -472,17 +472,19 @@ def create_manifest3(identifier, domain=None, page=None):
 
     elif mediatype == 'image':
         (multiFile, format) = checkMultiItem(metadata)
-        #print (f"Checking multiFile {multiFile} {format}")
+        print (f"Checking multiFile {multiFile} {format}")
         if multiFile:
             # Create multi file manifest
+            pageCount = 0
             for file in metadata['files']:
                 if file['source'] == "original" and file['format'] == format:
                     imgId = f"{identifier}/{file['name']}".replace('/','%2f')
                     imgURL = f"{IMG_SRV}/3/{imgId}"
+                    pageCount += 1
 
                     try:
                         manifest.make_canvas_from_iiif(url=imgURL,
-                                                    id=f"{URI_PRIFIX}/{identifier}/canvas",
+                                                    id=f"{URI_PRIFIX}/{identifier}${pageCount}/canvas",
                                                     label=f"{file['name']}",
                                                     anno_page_id=f"{uri}/annotationPage/1",
                                                     anno_id=f"{uri}/annotation/1")

tests/test_manifests.py

@@ -144,17 +144,21 @@ def test_metadata_array(self):
         manifest = resp.json
         self.assertTrue(len(manifest['summary']['none']) > 1, f"Expected multiple summary values, but got {manifest['summary']['none']}")
 
-    def test_multi_file(self):
+    def test_multi_file_image(self):
         resp = self.test_app.get("/iiif/3/arkivkopia.se-lms-G70-48.3/manifest.json")
         self.assertEqual(resp.status_code, 200)
         manifest = resp.json
         self.assertEqual(len(manifest['items']),3, f"Expected three canvases, but got {len(manifest['items'])}")
 
+        firstCanvasId = manifest['items'][0]['id']
+        for i in range(1, len(manifest['items'])):
+            self.assertNotEqual(manifest['items'][i]['id'], firstCanvasId, 'Canvas Ids need to be unique')
+
     def test_multi_file(self):
         resp = self.test_app.get("/iiif/3/st-anthony-relics-01/manifest.json")
         self.assertEqual(resp.status_code, 200)
         manifest = resp.json
-        self.assertEqual(len(manifest['items']),5, f"Expected five canvases, but got {len(manifest['items'])}")
+        self.assertEqual(len(manifest['items']),6, f"Expected five canvases, but got {len(manifest['items'])}")
 
 
 ''' to test: