73 lines
2.1 KiB
JavaScript
73 lines
2.1 KiB
JavaScript
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var Q = require('q');
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var url = require('url');
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var fs = require('fs');
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var path = require('path');
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var request = require('request');
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function codeblock(language, content) {
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return '<pre><code class="lang-' + language + '">' + content + '</code></pre>';
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}
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// Convert a range to a {start,end} object
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function rangeToLines(range) {
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range = (range || '').split(':');
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if (range.length != 2) {
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return null;
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}
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return {
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start: Number(range[0]) - 1,
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end: Number(range[1]) - 1
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}
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}
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module.exports = {
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blocks: {
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codesnippet: {
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process: function(block) {
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var that = this;
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var filename = block.args[0];
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// Lines range
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var range = rangeToLines(block.kwargs.lines);
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// Determine language
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var language = block.kwargs.language || (filename? path.extname(filename).slice(1) : '');
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if (!filename) return codeblock(language, block.body);
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// Read the file
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return Q()
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.then(function() {
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if (url.parse(filename).protocol) {
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var d = Q.defer();
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request(filename, function (error, response, body) {
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if (error) return d.reject(error);
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if (Math.floor(response.statusCode/200) != 1) d.reject(new Error('No 2XX status code when downloading '+filename));
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d.resolve(body.toString('utf-8'));
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});
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return d.promise;
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} else {
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return that.book.readFile(filename);
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}
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})
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// Return the html content
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.then(function(content) {
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if (range) {
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var lines = content.match(/[^\r\n]+/g);
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lines = lines.slice(range.start, range.end);
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content = lines.join('\n');
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}
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return codeblock(language, content);
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});
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}
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}
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}
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};
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