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render-nunjucks.js
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render-nunjucks.js
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/**
*
* Copyright 2020 David Herron
*
* This file is part of AkashaCMS (http://akashacms.com/).
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
'use strict';
// const util = require('util');
const path = require('path');
const HTMLRenderer = require('./HTMLRenderer');
const nunjucks = require('nunjucks');
const _nunjuck_env = Symbol('id');
const getMounted = (dir) => {
if (typeof dir === 'string') return dir;
else return dir.src;
};
module.exports = class NunjucksRenderer extends HTMLRenderer {
constructor() {
super(".html.njk", /^(.*\.html)\.(njk)$/);
this[_nunjuck_env] = undefined;
}
njkenv(config) {
if (this[_nunjuck_env]) return this[_nunjuck_env];
// console.log(`njkenv layoutDirs ${util.inspect(config.layoutDirs)}`);
// Detect if config is not set
if (!config) throw new Error(`render-nunjucks no config`);
// Get the paths for both the Layouts and Partials directories,
// because with Nunjucks we are storing macros files in some
// layouts directories.
const layoutsMounted = config.layoutDirs.map(getMounted);
const partialsMounted = config.partialsDirs.map(getMounted);
const loadFrom = layoutsMounted.concat(partialsMounted);
// console.log(`njkenv `, loadFrom);
// An open question is whether to create a custom Loader
// class to integrate Nunjucks better with FileCache. Clearly
// Nunjucks can handle files being updated behind the scene.
this[_nunjuck_env] = new nunjucks.Environment(
// Using watch=true requires installing chokidar
new nunjucks.FileSystemLoader(loadFrom, { watch: false }),
// config.layoutDirs.concat(config.partialsDirs), { watch: false }),
{
autoescape: false
}
);
// console.log(`njkenv`, this[_nunjuck_env]);
return this[_nunjuck_env];
}
async render(text, metadata) {
try {
let env = this.njkenv(metadata.config);
return env.renderString(text, metadata);
// nunjucks.configure({ autoescape: false });
// return nunjucks.renderString(text, metadata);
} catch(e) {
var docpath = metadata.document ? metadata.document.path : "unknown";
var errstack = e.stack ? e.stack : e;
throw new Error(`Error with Nunjucks in file ${docpath} ${errstack}`);
}
}
renderSync(text, metadata) {
try {
if (!metadata.config) {
// This condition can cause a problem in this.njkenv
throw new Error(`render-nunjucks renderSync no config`);
}
let env = this.njkenv(metadata.config);
return env.renderString(text, metadata);
// nunjucks.configure({ autoescape: false });
// return nunjucks.renderString(text, metadata);
} catch(e) {
var docpath = metadata.document ? metadata.document.path : "unknown";
var errstack = e.stack ? e.stack : e;
throw new Error(`Error with Nunjucks in file ${docpath} ${errstack}`);
}
}
/**
* We cannot allow PHP code to run through Mahabhuta.
*/
doMahabhuta(fpath) {
return true;
}
}