85 lines
2.2 KiB
JavaScript
85 lines
2.2 KiB
JavaScript
|
/* global promisify */
|
||
|
|
/* exported createChromeStorageDB */
|
||
|
|
'use strict';
|
||
|
|
|
||
|
|
function createChromeStorageDB() {
|
||
|
|
const get = promisify(chrome.storage.local.get.bind(chrome.storage.local));
|
||
|
|
const set = promisify(chrome.storage.local.set.bind(chrome.storage.local));
|
||
|
|
const remove = promisify(chrome.storage.local.remove.bind(chrome.storage.local));
|
||
|
|
|
||
|
|
let INC;
|
||
|
|
|
||
|
|
const PREFIX = 'style-';
|
||
|
|
const METHODS = {
|
||
|
|
// FIXME: we don't use this method at all. Should we remove this?
|
||
|
|
get: id => get(PREFIX + id)
|
||
|
|
.then(result => result[PREFIX + id]),
|
||
|
|
put: obj => Promise.resolve()
|
||
|
|
.then(() => {
|
||
|
|
if (!obj.id) {
|
||
|
|
return prepareInc()
|
||
|
|
.then(() => {
|
||
|
|
// FIXME: should we clone the object?
|
||
|
|
obj.id = INC++;
|
||
|
|
});
|
||
|
|
}
|
||
|
|
})
|
||
|
|
.then(() => set({[PREFIX + obj.id]: obj}))
|
||
|
|
.then(() => obj.id),
|
||
|
|
putMany: items => prepareInc()
|
||
|
|
.then(() => {
|
||
|
|
for (const item of items) {
|
||
|
|
if (!item.id) {
|
||
|
|
item.id = INC++;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return set(items.reduce((obj, curr) => {
|
||
|
|
obj[PREFIX + curr.id] = curr;
|
||
|
|
return obj;
|
||
|
|
}, {}));
|
||
|
|
})
|
||
|
|
.then(() => items.map(i => i.id)),
|
||
|
|
delete: id => remove(PREFIX + id),
|
||
|
|
getAll: () => get(null)
|
||
|
|
.then(result => {
|
||
|
|
const output = [];
|
||
|
|
for (const key in result) {
|
||
|
|
if (key.startsWith(PREFIX) && Number(key.slice(PREFIX.length))) {
|
||
|
|
output.push(result[key]);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return output;
|
||
|
|
})
|
||
|
|
};
|
||
|
|
|
||
|
|
return {exec};
|
||
|
|
|
||
|
|
function exec(method, ...args) {
|
||
|
|
if (METHODS[method]) {
|
||
|
|
return METHODS[method](...args)
|
||
|
|
.then(result => {
|
||
|
|
if (method === 'putMany' && result.map) {
|
||
|
|
return result.map(r => ({target: {result: r}}));
|
||
|
|
}
|
||
|
|
return {target: {result}};
|
||
|
|
});
|
||
|
|
}
|
||
|
|
return Promise.reject(new Error(`unknown DB method ${method}`));
|
||
|
|
}
|
||
|
|
|
||
|
|
function prepareInc() {
|
||
|
|
if (INC) return Promise.resolve();
|
||
|
|
return get(null).then(result => {
|
||
|
|
INC = 1;
|
||
|
|
for (const key in result) {
|
||
|
|
if (key.startsWith(PREFIX)) {
|
||
|
|
const id = Number(key.slice(PREFIX.length));
|
||
|
|
if (id >= INC) {
|
||
|
|
INC = id + 1;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
});
|
||
|
|
}
|
||
|
|
}
|