Transfer annotations when converting linked files to stored files

Previously, any annotations on the linked file were partially deleted,
leaving broken `items` rows without `itemAnnotations` rows.

chrome/content/zotero/xpcom/attachments.js

@@ -2553,7 +2553,7 @@ Zotero.Attachments = new function(){
 	
 	
 	this.convertLinkedFileToStoredFile = async function (item, options = {}) {
-		if (item.attachmentLinkMode != Zotero.Attachments.LINK_MODE_LINKED_FILE) {
+		if (!item.isLinkedFileAttachment()) {
 			throw new Error("Not a linked-file attachment");
 		}
 		
@@ -2572,6 +2572,9 @@ Zotero.Attachments = new function(){
 		newItem.fromJSON(json);
 		await newItem.saveTx();
 		
+		// Move child annotations and embedded-image attachments
+		await Zotero.Items.moveChildItems(item, newItem);
+		// Copy relations pointing to the old item
 		await Zotero.Relations.copyObjectSubjectRelations(item, newItem);
 		
 		var newFile;

chrome/content/zotero/xpcom/data/items.js

@@ -875,6 +875,29 @@ Zotero.Items = function() {
 	});
 	
 	
+	/**
+	 * Move child items from one item to another
+	 *
+	 * @param {Zotero.Item} fromItem
+	 * @param {Zotero.Item} toItem
+	 * @return {Promise}
+	 */
+	this.moveChildItems = async function (fromItem, toItem) {
+		// Annotations on files
+		if (fromItem.isFileAttachment()) {
+			await Zotero.DB.executeTransaction(async function () {
+				let annotations = fromItem.getAnnotations();
+				for (let annotation of annotations) {
+					annotation.parentItemID = toItem.id;
+					await annotation.save();
+				}
+			}.bind(this));
+		}
+		
+		// TODO: Other things as necessary
+	};
+	
+	
 	this.merge = function (item, otherItems) {
 		Zotero.debug("Merging items");
 		

test/tests/attachmentsTest.js

@@ -1339,6 +1339,30 @@ describe("Zotero.Attachments", function() {
 		});
 		
 		
+		it("should move annotations to stored file", async function () {
+			var item = await createDataObject('item');
+			var relatedItem = await createDataObject('item');
+			
+			var originalFile = OS.Path.join(getTestDataDirectory().path, 'test.pdf');
+			var attachment = await Zotero.Attachments.linkFromFile({
+				file: originalFile,
+				title: 'Title',
+				parentItemID: item.id
+			});
+			var annotation1 = await createAnnotation('highlight', attachment);
+			var annotation2 = await createAnnotation('note', attachment);
+			
+			var newAttachment = await Zotero.Attachments.convertLinkedFileToStoredFile(attachment);
+			
+			assert.isFalse(Zotero.Items.exists(attachment.id));
+			assert.isTrue(Zotero.Items.exists(annotation1.id));
+			assert.isTrue(Zotero.Items.exists(annotation2.id));
+			
+			var annotations = newAttachment.getAnnotations();
+			assert.lengthOf(annotations, 2);
+		});
+		
+		
 		it("should move a linked file to a stored file with `move: true`", async function () {
 			var item = await createDataObject('item');