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var url = require('url');
var path = require('path');
// Is the link an external link
function isExternal(href) {
try {
return Boolean(url.parse(href).protocol);
} catch(err) {
return false;
}
}
// Return true if the link is relative
function isRelative(href) {
try {
var parsed = url.parse(href);
return !!(!parsed.protocol && parsed.path);
} catch(err) {
return true;
}
}
// Return true if the link is an achor
function isAnchor(href) {
try {
var parsed = url.parse(href);
return !!(!parsed.protocol && !parsed.path && parsed.hash);
} catch(err) {
return false;
}
}
// Normalize a path to be a link
function normalizeLink(s) {
return s.replace(/\\/g, '/');
}
// Relative to absolute path
// dir: directory parent of the file currently in rendering process
// outdir: directory parent from the html output
function toAbsolute(_href, dir, outdir) {
if (isExternal(_href)) return _href;
// Path "_href" inside the base folder
var hrefInRoot = path.normalize(path.join(dir, _href));
if (_href[0] == '/') hrefInRoot = path.normalize(_href.slice(1));
// Make it relative to output
_href = path.relative(outdir, hrefInRoot);
// Normalize windows paths
_href = normalizeLink(_href);
return _href;
}
// Join links
function join() {
var _href = path.join.apply(path, arguments);
return normalizeLink(_href);
};
// Change extension
function changeExtension(filename, newext) {
return path.join(
path.dirname(filename),
path.basename(filename, path.extname(filename))+newext
);
}
module.exports = {
isAnchor: isAnchor,
isRelative: isRelative,
isExternal: isExternal,
toAbsolute: toAbsolute,
join: join,
changeExtension: changeExtension,
normalize: normalizeLink
};
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