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var _ = require('lodash');
var kramed = require('kramed');
var hljs = require('highlight.js');
var lex = require('./lex');
var renderer = require('./renderer');
var codeInclude = require('./code_include');
var lnormalize = require('../utils/lang').normalize;
// Render a section using our custom renderer
function render(section, _options) {
// Copy section
var links = section.links || {};
section = _.toArray(section);
section.links = links;
// Build options using defaults and our custom renderer
var options = _.extend({}, kramed.defaults, {
renderer: renderer(null, _options),
// Synchronous highlighting with highlight.js
highlight: function (code, lang) {
if(!lang) return code;
// Normalize lang
lang = lnormalize(lang);
try {
return hljs.highlight(lang, code).value;
} catch(e) { }
return code;
}
});
return kramed.parser(section, options);
}
function quizQuestion(node) {
if (node.text) {
node.text = node.text.replace(/^([\[(])x([\])])/, "$1 $2");
} else {
return node.replace(/^([\[(])x([\])])/, "$1 $2");
}
}
function parsePage(src, options) {
options = options || {};
// Lex if not already lexed
return (_.isArray(src) ? src : lex(src))
.map(function(section) {
// Transform given type
if(section.type === 'exercise') {
var nonCodeNodes = _.reject(section, {
'type': 'code'
});
var codeNodes = _.filter(section, {
'type': 'code'
});
// Languages in code blocks
var langs = _.pluck(codeNodes, 'lang').map(lnormalize);
// Check that they are all the same
var validLangs = _.all(_.map(langs, function(lang) {
return lang && lang === langs[0];
}));
// Main language
var lang = validLangs ? langs[0] : null;
// codeInclude shortcut
var ci = function(code) {
return codeInclude(code, options.dir);
};
return {
id: section.id,
type: section.type,
content: render(nonCodeNodes, options),
lang: lang,
code: {
base: ci(codeNodes[0].text),
solution: ci(codeNodes[1].text),
validation: ci(codeNodes[2].text),
// Context is optional
context: codeNodes[3] ? codeNodes[3].text : null,
}
};
} else if (section.type === 'quiz') {
var quiz = [], question, foundFeedback = false;
var nonQuizNodes = section[0].type === 'paragraph' && section[1].type !== 'list_start' ? [section[0]] : [];
var quizNodes = section.slice(0);
quizNodes.splice(0, nonQuizNodes.length);
for (var i = 0; i < quizNodes.length; i++) {
var node = quizNodes[i];
if (question && (((node.type === 'list_end' || node.type === 'blockquote_end') && i === quizNodes.length - 1)
|| node.type === 'table' || (node.type === 'paragraph' && !foundFeedback))) {
quiz.push({
base: render(question.questionNodes, options),
solution: render(question.solutionNodes, options),
feedback: render(question.feedbackNodes, options)
});
}
if (node.type === 'table' || (node.type === 'paragraph' && !foundFeedback)) {
question = { questionNodes: [], solutionNodes: [], feedbackNodes: [] };
}
if (node.type === 'blockquote_start') {
foundFeedback = true;
} else if (node.type === 'blockquote_end') {
foundFeedback = false;
}
if (node.type === 'table') {
question.solutionNodes.push(_.cloneDeep(node));
node.cells = node.cells.map(function(row) {
return row.map(quizQuestion);
});
question.questionNodes.push(node);
} else if (!/blockquote/.test(node.type)) {
if (foundFeedback) {
question.feedbackNodes.push(node);
} else if (node.type === 'paragraph' || node.type === 'text'){
question.solutionNodes.push(_.cloneDeep(node));
quizQuestion(node);
question.questionNodes.push(node);
} else {
question.solutionNodes.push(node);
question.questionNodes.push(node);
}
}
}
return {
id: section.id,
type: section.type,
content: render(nonQuizNodes, options),
quiz: quiz
};
}
// Render normal pages
return {
id: section.id,
type: section.type,
content: render(section, options)
};
});
}
// Exports
module.exports = parsePage;
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