source: frontend/node_modules/relateurl/lib/index.js

"use strict";

var constants  = require("./constants");
var formatUrl  = require("./format");
var getOptions = require("./options");
var objUtils   = require("./util/object");
var parseUrl   = require("./parse");
var relateUrl  = require("./relate");



function RelateUrl(from, options)
{
        this.options = getOptions(options,
        {
                defaultPorts: {ftp:21, http:80, https:443},
                directoryIndexes: ["index.html"],
                ignore_www: false,
                output: RelateUrl.SHORTEST,
                rejectedSchemes: ["data","javascript","mailto"],
                removeAuth: false,
                removeDirectoryIndexes: true,
                removeEmptyQueries: false,
                removeRootTrailingSlash: true,
                schemeRelative: true,
                site: undefined,
                slashesDenoteHost: true
        });
        
        this.from = parseUrl.from(from, this.options, null);
}



/*
        Usage: instance=new RelateUrl(); instance.relate();
*/
RelateUrl.prototype.relate = function(from, to, options)
{
        // relate(to,options)
        if ( objUtils.isPlainObject(to) )
        {
                options = to;
                to = from;
                from = null;
        }
        // relate(to)
        else if (!to)
        {
                to = from;
                from = null;
        }
        
        options = getOptions(options, this.options);
        from = from || options.site;
        from = parseUrl.from(from, options, this.from);
        
        if (!from || !from.href)
        {
                throw new Error("from value not defined.");
        }
        else if (from.extra.hrefInfo.minimumPathOnly)
        {
                throw new Error("from value supplied is not absolute: "+from.href);
        }
        
        to = parseUrl.to(to, options);
        
        if (to.valid===false) return to.href;
        
        to = relateUrl(from, to, options);
        to = formatUrl(to, options);
        
        return to;
}



/*
        Usage: RelateUrl.relate();
*/
RelateUrl.relate = function(from, to, options)
{
        return new RelateUrl().relate(from, to, options);
}



// Make constants accessible from API
objUtils.shallowMerge(RelateUrl, constants);



module.exports = RelateUrl;