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var components = require('../components.js');
var peerDependentsMap = null;
function getPeerDependentsMap() {
var peerDependentsMap = {};
Object.keys(components.languages).forEach(function (language) {
if (language === 'meta') {
return false;
}
if (components.languages[language].peerDependencies) {
var peerDependencies = components.languages[language].peerDependencies;
if (!Array.isArray(peerDependencies)) {
peerDependencies = [peerDependencies];
}
peerDependencies.forEach(function (peerDependency) {
if (!peerDependentsMap[peerDependency]) {
peerDependentsMap[peerDependency] = [];
}
peerDependentsMap[peerDependency].push(language);
});
}
});
return peerDependentsMap;
}
function getPeerDependents(mainLanguage) {
if (!peerDependentsMap) {
peerDependentsMap = getPeerDependentsMap();
}
return peerDependentsMap[mainLanguage] || [];
}
function loadLanguages(arr, withoutDependencies) {
// If no argument is passed, load all components
if (!arr) {
arr = Object.keys(components.languages).filter(function (language) {
return language !== 'meta';
});
}
if (arr && !arr.length) {
return;
}
if (!Array.isArray(arr)) {
arr = [arr];
}
arr.forEach(function (language) {
if (!components.languages[language]) {
console.warn('Language does not exist ' + language);
return;
}
// Load dependencies first
if (!withoutDependencies && components.languages[language].require) {
loadLanguages(components.languages[language].require);
}
var pathToLanguage = './prism-' + language;
delete require.cache[require.resolve(pathToLanguage)];
delete Prism.languages[language];
require(pathToLanguage);
// Reload dependents
var dependents = getPeerDependents(language).filter(function (dependent) {
// If dependent language was already loaded,
// we want to reload it.
if (Prism.languages[dependent]) {
delete Prism.languages[dependent];
return true;
}
return false;
});
if (dependents.length) {
loadLanguages(dependents, true);
}
});
}
module.exports = function (arr) {
// Don't expose withoutDependencies
loadLanguages(arr);
};
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