stylus/background/usercss-helper.js
2017-10-16 14:59:45 +08:00

105 lines
2.6 KiB
JavaScript

/* global usercss saveStyle getStyles */
'use strict';
// eslint-disable-next-line no-var
var usercssHelper = (function () {
function buildMeta(style) {
if (style.usercssData) {
return Promise.resolve(style);
}
try {
const {sourceCode} = style;
// allow sourceCode to be normalized
delete style.sourceCode;
return Promise.resolve(Object.assign(usercss.buildMeta(sourceCode), style));
} catch (e) {
return Promise.reject(e);
}
}
function buildCode(style) {
return usercss.buildCode(style);
}
function wrapReject(pending) {
return pending.then(result => ({status: 'success', result}))
.catch(err => ({status: 'error', result: err.message || String(err)}));
}
// Parse the source and find the duplication
// style: {sourceCode: string, checkDup: boolean}
function build(request, noReject) {
const pending = buildMeta(request)
.then(style => Promise.all([buildCode(style), checkDup(style)]))
.then(([style, dup]) => ({style, dup}));
if (noReject) {
return wrapReject(pending);
}
return pending;
function checkDup(style) {
const {checkDup} = style;
delete style.checkDup;
if (checkDup) {
return findDup(style);
}
}
}
function save(style, noReject) {
const pending = buildMeta(style)
.then(assignVars)
.then(buildCode)
.then(saveStyle);
if (noReject) {
return wrapReject(pending);
}
return pending;
function assignVars(style) {
if (style.reason === 'config' && style.id) {
return style;
}
return findDup(style)
.then(dup => {
if (dup) {
style.id = dup.id;
if (style.reason !== 'config') {
// preserve style.vars during update
usercss.assignVars(style, dup);
}
}
return style;
});
}
}
function findDup(style) {
if (style.id) {
return getStyles({id: style.id}).then(s => s[0]);
}
return getStyles().then(styles =>
styles.find(target => {
if (!target.usercssData) {
return false;
}
return target.usercssData.name === style.usercssData.name &&
target.usercssData.namespace === style.usercssData.namespace;
})
);
}
function openInstallPage(tabId, request) {
const url = '/install-usercss.html' +
'?updateUrl=' + encodeURIComponent(request.updateUrl) +
'&tabId=' + tabId;
return wrapReject(openURL({url}));
}
return {build, save, findDup, openInstallPage};
})();