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var _ = require('lodash');
var path = require('path');
var cheerio = require('cheerio');
var links = require('./links');
function replaceText($, el, search, replace, text_only ) {
return $(el).each(function(){
var node = this.firstChild,
val,
new_val,
// Elements to be removed at the end.
remove = [];
// Only continue if firstChild exists.
if ( node ) {
// Loop over all childNodes.
do {
// Only process text nodes.
if ( node.nodeType === 3 ) {
// The original node value.
val = node.nodeValue;
// The new value.
new_val = val.replace( search, replace );
// Only replace text if the new value is actually different!
if ( new_val !== val ) {
if ( !text_only && /</.test( new_val ) ) {
// The new value contains HTML, set it in a slower but far more
// robust way.
$(node).before( new_val );
// Don't remove the node yet, or the loop will lose its place.
remove.push( node );
} else {
// The new value contains no HTML, so it can be set in this
// very fast, simple way.
node.nodeValue = new_val;
}
}
}
} while ( node = node.nextSibling );
}
// Time to remove those elements!
remove.length && $(remove).remove();
});
};
function pregQuote( str ) {
return (str+'').replace(/([\\\.\+\*\?\[\^\]\$\(\)\{\}\=\!\<\>\|\:])/g, "\\$1");
};
// Adapt an html snippet to be relative to a base folder
function normalizeHtml(src, options) {
var $ = cheerio.load(src);
$("img").each(function() {
var src = $(this).attr("src");
// Transform as absolute
if (links.isRelative(src)) {
src = links.toAbsolute(src, options.base, options.output);
}
$(this).attr("src", src);
});
$("a").each(function() {
var href = $(this).attr("href");
if (links.isRelative(href)) {
var absolutePath = path.join(options.base, href);
// If is in navigation relative: change extsnio nto be .html
if (options.navigation[absolutePath]) href = links.changeExtension(href, ".html");
// Transform as absolute
href = links.toAbsolute(href, options.base, options.output);
} else {
$(this).attr("target", "_blank");
}
// Transform extension
$(this).attr("href", href);
});
// Replace glossayr terms
_.each(options.glossary, function(term) {
var r = new RegExp( "\\b(" + pregQuote(term.name.toLowerCase()) + ")\\b" , 'gi' );
$("*").each(function() {
replaceText($, this, r, function(match) {
return "<a href='"+links.toAbsolute("GLOSSARY.html", options.base, options.output)+"#"+term.id+"' class='glossary-term' title='"+term.description+"'>"+match+"</span>";
});
});
});
return $.html();
};
// Adapt page content to be relative to a base folder
function normalizePage(sections, options) {
options = _.defaults(options || {}, {
// Navigation to use to transform path
navigation: {},
// Directory parent of the file currently in rendering process
base: "./",
// Directory parent from the html output
output: "./",
// Glossary terms
glossary: []
});
return _.map(sections, function(section) {
if (section.type != "normal") return section;
section.content = normalizeHtml(section.content, options);
return section;
});
};
module.exports = {
normalize: normalizePage
};
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