@ackplus/nest-dynamic-templates/src/lib/engines/template/nunjucks.engine.js

Dynamic template management for NestJS applications

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.NunjucksEngine = void 0;
const lodash_1 = require("lodash");
const template_types_1 = require("../../interfaces/template.types");
const template_engine_1 = require("../template-engine");
class NunjucksEngine extends template_engine_1.TemplateEngine {
    constructor(options, customOptions) {
        super();
        this.options = options;
        this.customOptions = customOptions;
        this.initNunjucks();
    }
    initNunjucks() {
        const nunjucks = require('nunjucks');
        const nunjucksOptions = (0, lodash_1.omit)(this.options, 'filters');
        this.env = nunjucks.configure({
            autoescape: true,
            throwOnUndefined: true,
            ...nunjucksOptions,
        });
        if (this.customOptions?.filters) {
            Object.entries(this.customOptions.filters).forEach(([name, filter]) => {
                this.registerFilter(name, filter);
            });
        }
    }
    async render(content, data) {
        try {
            return new Promise((resolve, reject) => {
                this.env.renderString(content, data, (err, result) => {
                    if (err) {
                        reject(err);
                    }
                    else {
                        resolve(result);
                    }
                });
            });
        }
        catch (error) {
            throw new Error(`Failed to render Nunjucks template: ${error?.message || 'Unknown error'}`);
        }
    }
    async validate(content) {
        try {
            await this.render(content, {});
            return true;
        }
        catch (error) {
            return false;
        }
    }
    registerFilter(name, filter) {
        this.env.addFilter(name, filter);
    }
}
exports.NunjucksEngine = NunjucksEngine;
NunjucksEngine.engineName = template_types_1.TemplateEngineEnum.NUNJUCKS;
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