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nunjuks.js
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nunjuks.js
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import nunjucks from "../deps/nunjuks.js";
import TemplateEngine from "./templateEngine.js";
export default class Denjuks extends TemplateEngine {
cache = new Map();
constructor(site, options = {}) {
super(site, options);
const loader = new nunjucks.FileSystemLoader(this.includes);
this.engine = new nunjucks.Environment(loader);
//Update cache
site.addEventListener("beforeUpdate", (ev) => {
for (const file of ev.files) {
const filename = site.src(file);
const name = loader.pathsToNames[filename];
if (name) {
delete loader.cache[name];
continue;
}
this.cache.delete(filename);
}
});
}
render(content, data, filename) {
if (!this.cache.has(filename)) {
this.cache.set(
filename,
nunjucks.compile(content, this.engine, filename),
);
}
return new Promise((resolve, reject) => {
this.cache.get(filename).render(data, (err, result) => {
if (err) {
reject(err);
} else {
resolve(result);
}
});
});
}
addFilter(name, fn, async) {
if (async) {
this.engine.addFilter(name, async (...args) => {
const cb = args.pop();
try {
const result = await fn(...args);
cb(null, result);
} catch (err) {
cb(err);
}
}, true);
return;
}
this.engine.addFilter(name, fn);
}
}