usage.cjs•1.52 kB
'use strict';
const { hasOwnProperty } = Object.prototype;
function buildMap(list, caseInsensitive) {
const map = Object.create(null);
if (!Array.isArray(list)) {
return null;
}
for (let name of list) {
if (caseInsensitive) {
name = name.toLowerCase();
}
map[name] = true;
}
return map;
}
function buildList(data) {
if (!data) {
return null;
}
const tags = buildMap(data.tags, true);
const ids = buildMap(data.ids);
const classes = buildMap(data.classes);
if (tags === null &&
ids === null &&
classes === null) {
return null;
}
return {
tags,
ids,
classes
};
}
function buildIndex(data) {
let scopes = false;
if (data.scopes && Array.isArray(data.scopes)) {
scopes = Object.create(null);
for (let i = 0; i < data.scopes.length; i++) {
const list = data.scopes[i];
if (!list || !Array.isArray(list)) {
throw new Error('Wrong usage format');
}
for (const name of list) {
if (hasOwnProperty.call(scopes, name)) {
throw new Error(`Class can't be used for several scopes: ${name}`);
}
scopes[name] = i + 1;
}
}
}
return {
whitelist: buildList(data),
blacklist: buildList(data.blacklist),
scopes
};
}
exports.buildIndex = buildIndex;