mirror of
https://github.com/kevin-DL/sapper.git
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128 lines
3.4 KiB
JavaScript
128 lines
3.4 KiB
JavaScript
const fs = require('fs');
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const glob = require('glob');
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const chalk = require('chalk');
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const chokidar = require('chokidar');
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const framer = require('code-frame');
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const { locate } = require('locate-character');
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const { dev } = require('./config.js');
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let templates;
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function error(e) {
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if (e.title) console.error(chalk.bold.red(e.title));
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if (e.body) console.error(chalk.red(e.body));
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if (e.url) console.error(chalk.cyan(e.url));
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if (e.frame) console.error(chalk.grey(e.frame));
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process.exit(1);
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}
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function create_templates() {
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templates = glob.sync('*.html', { cwd: 'templates' })
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.map(file => {
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const template = fs.readFileSync(`templates/${file}`, 'utf-8');
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const status = file.replace('.html', '').toLowerCase();
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if (!/^[0-9x]{3}$/.test(status)) {
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error({
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title: `templates/${file}`,
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body: `Bad template — should be a valid status code like 404.html, or a wildcard like 2xx.html`
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});
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}
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const index = template.indexOf('%sapper.main%');
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if (index !== -1) {
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// TODO remove this in a future version
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const { line, column } = locate(template, index, { offsetLine: 1 });
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const frame = framer(template, line, column);
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error({
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title: `templates/${file}`,
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body: `<script src='%sapper.main%'> has been removed — use %sapper.scripts% (without the <script> tag) instead`,
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url: 'https://github.com/sveltejs/sapper/issues/86',
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frame
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});
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}
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const specificity = (
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(status[0] === 'x' ? 0 : 4) +
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(status[1] === 'x' ? 0 : 2) +
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(status[2] === 'x' ? 0 : 1)
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);
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const pattern = new RegExp(`^${status.split('').map(d => d === 'x' ? '\\d' : d).join('')}$`);
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return {
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test: status => pattern.test(status),
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specificity,
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render: data => {
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return template.replace(/%sapper\.(\w+)%/g, (match, key) => {
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return key in data ? data[key] : '';
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});
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},
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stream: (res, data) => {
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let i = 0;
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function stream_inner() {
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if (i >= template.length) {
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return;
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}
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const start = template.indexOf('%sapper', i);
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if (start === -1) {
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res.end(template.slice(i));
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return;
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}
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res.write(template.slice(i, start));
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const end = template.indexOf('%', start + 1);
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if (end === -1) {
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throw new Error(`Bad template`); // TODO validate ahead of time
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}
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const tag = template.slice(start + 1, end);
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const match = /sapper\.(\w+)/.exec(tag);
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if (!match || !(match[1] in data)) throw new Error(`Bad template`); // TODO ditto
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return Promise.resolve(data[match[1]]).then(datamatch => {
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res.write(datamatch);
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i = end + 1;
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return stream_inner();
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});
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}
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return Promise.resolve().then(stream_inner);
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}
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};
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})
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.sort((a, b) => b.specificity - a.specificity);
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}
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create_templates();
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if (dev) {
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const watcher = chokidar.watch('templates/**.html', {
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ignoreInitial: true,
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persistent: false
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});
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watcher.on('add', create_templates);
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watcher.on('change', create_templates);
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watcher.on('unlink', create_templates);
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}
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exports.render = (status, data) => {
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const template = templates.find(template => template.test(status));
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if (template) return template.render(data);
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return `Missing template for status code ${status}`;
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};
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exports.stream = (res, status, data) => {
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const template = templates.find(template => template.test(status));
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if (template) return template.stream(res, data);
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return `Missing template for status code ${status}`;
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}; |