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* Fastify integration for Coherent.js
* Provides plugins and utilities for using Coherent.js with Fastify
*/
import { renderToString } from '../rendering/html-renderer.js';
import { performanceMonitor } from '../performance/monitor.js';
/**
* Fastify plugin for Coherent.js
* Automatically renders Coherent.js components and handles errors
*
* @param {Object} fastify - Fastify instance
* @param {Object} options - Plugin options
* @param {boolean} options.enablePerformanceMonitoring - Enable performance monitoring
* @param {string} options.template - HTML template with {{content}} placeholder
* @param {Function} done - Callback to signal plugin registration completion
*/
export function coherentFastify(fastify, options, done) {
const {
enablePerformanceMonitoring = false,
template = '<!DOCTYPE html>\n{{content}}'
} = options;
// Add decorator to check if an object is a Coherent.js component
fastify.decorateReply('isCoherentObject', (obj) => {
if (!obj || typeof obj !== 'object' || Array.isArray(obj)) {
return false;
}
const keys = Object.keys(obj);
return keys.length === 1;
});
// Add decorator for rendering Coherent.js components
fastify.decorateReply('coherent', function(component, renderOptions = {}) {
const {
enablePerformanceMonitoring: renderPerformanceMonitoring = enablePerformanceMonitoring,
template: renderTemplate = template
} = renderOptions;
try {
let html;
if (renderPerformanceMonitoring) {
const renderId = performanceMonitor.startRender();
html = renderToString(component);
performanceMonitor.endRender(renderId);
} else {
html = renderToString(component);
}
// Apply template
const finalHtml = renderTemplate.replace('{{content}}', html);
// Set content type and send HTML
this.header('Content-Type', 'text/html; charset=utf-8');
this.send(finalHtml);
} catch (error) {
console.error('Coherent.js rendering error:', error);
this.status(500).send({
error: 'Internal Server Error',
message: error.message
});
}
});
// Hook to automatically render Coherent.js objects
fastify.addHook('onSend', async (request, reply, payload) => {
// If payload is a Coherent.js object, render it
if (reply.isCoherentObject(payload)) {
try {
let html;
if (enablePerformanceMonitoring) {
const renderId = performanceMonitor.startRender();
html = renderToString(payload);
performanceMonitor.endRender(renderId);
} else {
html = renderToString(payload);
}
// Apply template
const finalHtml = template.replace('{{content}}', html);
// Set content type and return HTML
reply.header('Content-Type', 'text/html; charset=utf-8');
return finalHtml;
} catch (error) {
console.error('Coherent.js rendering error:', error);
throw error;
}
}
// For non-Coherent.js data, return as-is
return payload;
});
done();
}
/**
* Create a Fastify route handler for Coherent.js components
*
* @param {Function} componentFactory - Function that returns a Coherent.js component
* @param {Object} options - Handler options
* @returns {Function} Fastify route handler
*/
export function createCoherentFastifyHandler(componentFactory, options = {}) {
const {
enablePerformanceMonitoring = false,
template = '<!DOCTYPE html>\n{{content}}'
} = options;
return async (request, reply) => {
try {
// Create component with request data
const component = await Promise.resolve(
componentFactory(request, reply)
);
if (!component) {
throw new Error('Component factory returned null/undefined');
}
// Render component
let html;
if (enablePerformanceMonitoring) {
const renderId = performanceMonitor.startRender();
html = renderToString(component);
performanceMonitor.endRender(renderId);
} else {
html = renderToString(component);
}
// Apply template
const finalHtml = template.replace('{{content}}', html);
// Send HTML response
reply.header('Content-Type', 'text/html; charset=utf-8');
return finalHtml;
} catch (error) {
console.error('Coherent.js handler error:', error);
throw error;
}
};
}
/**
* Setup Coherent.js with Fastify instance
*
* @param {Object} fastify - Fastify instance
* @param {Object} options - Setup options
*/
export function setupCoherentFastify(fastify, options = {}) {
fastify.register(coherentFastify, options);
}
// Export plugin as default for Fastify's plugin system
export default coherentFastify;
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