Move apps/cory/ => apps/. Going to change import and export to support this.

git-svn-id: https://www.unprompted.com/svn/projects/tildefriends/trunk@4163 ed5197a5-7fde-0310-b194-c3ffbd925b24

apps/todo/app.js

@@ -0,0 +1,82 @@
+import * as tfrpc from '/tfrpc.js';
+
+let g_db;
+
+tfrpc.register(async function todo_get_all() {
+	let names = await todo_get_names();
+	let result = [];
+	for (let name of names) {
+		result.push({
+			name: name,
+			items: await todo_get(name),
+		});
+	}
+	return result;
+});
+
+async function todo_get_names() {
+	return JSON.parse((await g_db.get('files')) ?? '[]');
+}
+
+async function todo_add(list) {
+	let exchanged = false;
+	let tries = 10;
+	while (!exchanged && tries-- > 0) {
+		let original = await g_db.get('files');
+		let names = JSON.parse(original ?? '[]');
+		let set = new Set(names);
+		set.add(list);
+		names = JSON.stringify([...set].sort());
+		exchanged = original === names || await g_db.exchange('files', original, names);
+	}
+	return exchanged;
+}
+tfrpc.register(todo_add);
+
+async function todo_remove(list) {
+	let exchanged = false;
+	let tries = 10;
+	while (!exchanged && tries-- > 0) {
+		let original = await g_db.get('files');
+		let names = JSON.parse(original ?? '[]');
+		let set = new Set(names);
+		set.delete(list);
+		names = JSON.stringify([...set].sort());
+		exchanged = original === names || await g_db.exchange('files', original, names);
+	}
+	await g_db.remove('list:' + list);
+	return exchanged;
+}
+tfrpc.register(todo_remove);
+
+tfrpc.register(async function todo_rename(old_name, new_name) {
+	if (await g_db.get('list:' + new_name)) {
+		throw RuntimeError(`${new_name} already exists.`);
+	}
+	let list = await todo_get(old_name);
+	await todo_set(new_name, list);
+	await todo_add(new_name);
+	await todo_remove(old_name);
+});
+
+async function todo_get(list) {
+	try {
+		let value = await g_db.get('list:' + list);
+		return JSON.parse(value ?? '[]');
+	} catch (error) {
+		print(error);
+		return [];
+	}
+}
+
+async function todo_set(list, value) {
+	await g_db.set('list:' + list, JSON.stringify(value));
+}
+tfrpc.register(todo_set);
+
+async function main() {
+	g_db = await database('todo');
+	await app.setDocument(utf8Decode(getFile('index.html')));
+}
+
+main();