tildefriends/apps/todo/app.js

Ignoring revisions in .git-blame-ignore-revs. Click here to bypass and see the normal blame view.

85 lines
1.9 KiB
JavaScript
Raw Normal View History

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();