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var _ = require('lodash');
var marked = require('marked');
var renderer = require('./renderer');
// Split a page up into sections (lesson, exercises, ...)
function splitSections(nodes) {
var section = [];
return _.reduce(nodes, function(sections, el) {
if(el.type === 'hr') {
sections.push(section);
section = [];
} else {
section.push(el);
}
return sections;
}, []).concat([section]); // Add remaining nodes
}
// What is the type of this section
function sectionType(nodes) {
if(_.filter(nodes, {
type: 'code'
}).length === 3) {
return 'exercise';
}
return 'normal';
}
function parsePage(src) {
var nodes = marked.lexer(src);
return _.chain(splitSections(nodes))
.map(function(section) {
// Detect section type
section.type = sectionType(section);
return section;
})
.map(function(section, idx) {
// Transform given type
if(section.type === 'exercise' && (idx % 2) == 1) {
return {
type: section.type,
};
}
// marked's Render expects this, we don't use it yet
section.links = {};
// Build options using defaults and our custom renderer
var options = _.extend({}, marked.defaults, {
renderer: renderer()
});
// Render normal pages
return {
type: section.type,
content: marked.parser(section, options)
};
})
.value();
}
// Exports
module.exports = parsePage;
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