ducha-qianduan/node_modules/relateurl/lib/format.js

"use strict";

var constants = require("./constants");



function formatAuth(urlObj, options)
{
	if (urlObj.auth && !options.removeAuth && (urlObj.extra.relation.maximumHost || options.output===constants.ABSOLUTE))
	{
		return urlObj.auth + "@";
	}
	
	return "";
}



function formatHash(urlObj, options)
{
	return urlObj.hash ? urlObj.hash : "";
}



function formatHost(urlObj, options)
{
	if (urlObj.host.full && (urlObj.extra.relation.maximumAuth || options.output===constants.ABSOLUTE))
	{
		return urlObj.host.full;
	}
	
	return "";
}



function formatPath(urlObj, options)
{
	var str = "";
	
	var absolutePath = urlObj.path.absolute.string;
	var relativePath = urlObj.path.relative.string;
	var resource = showResource(urlObj, options);
	
	if (urlObj.extra.relation.maximumHost || options.output===constants.ABSOLUTE || options.output===constants.ROOT_RELATIVE)
	{
		str = absolutePath;
	}
	else if (relativePath.length<=absolutePath.length && options.output===constants.SHORTEST || options.output===constants.PATH_RELATIVE)
	{
		str = relativePath;
		
		if (str === "")
		{
			var query = showQuery(urlObj,options) && !!getQuery(urlObj,options);
			
			if (urlObj.extra.relation.maximumPath && !resource)
			{
				str = "./";
			}
			else if (urlObj.extra.relation.overridesQuery && !resource && !query)
			{
				str = "./";
			}
		}
	}
	else
	{
		str = absolutePath;
	}
	
	if ( str==="/" && !resource && options.removeRootTrailingSlash && (!urlObj.extra.relation.minimumPort || options.output===constants.ABSOLUTE) )
	{
		str = "";
	}
	
	return str;
}



function formatPort(urlObj, options)
{
	if (urlObj.port && !urlObj.extra.portIsDefault && urlObj.extra.relation.maximumHost)
	{
		return ":" + urlObj.port;
	}
	
	return "";
}



function formatQuery(urlObj, options)
{
	return showQuery(urlObj,options) ? getQuery(urlObj, options) : "";
}



function formatResource(urlObj, options)
{
	return showResource(urlObj,options) ? urlObj.resource : "";
}



function formatScheme(urlObj, options)
{
	var str = "";
	
	if (urlObj.extra.relation.maximumHost || options.output===constants.ABSOLUTE)
	{
		if (!urlObj.extra.relation.minimumScheme || !options.schemeRelative || options.output===constants.ABSOLUTE)
		{
			str += urlObj.scheme + "://";
		}
		else
		{
			str += "//";
		}
	}
	
	return str;
}



function formatUrl(urlObj, options)
{
	var url = "";
	
	url += formatScheme(urlObj, options);
	url += formatAuth(urlObj, options);
	url += formatHost(urlObj, options);
	url += formatPort(urlObj, options);
	url += formatPath(urlObj, options);
	url += formatResource(urlObj, options);
	url += formatQuery(urlObj, options);
	url += formatHash(urlObj, options);
	
	return url;
}



function getQuery(urlObj, options)
{
	var stripQuery = options.removeEmptyQueries && urlObj.extra.relation.minimumPort;
	
	return urlObj.query.string[ stripQuery ? "stripped" : "full" ];
}



function showQuery(urlObj, options)
{
	return !urlObj.extra.relation.minimumQuery || options.output===constants.ABSOLUTE || options.output===constants.ROOT_RELATIVE;
}



function showResource(urlObj, options)
{
	var removeIndex = options.removeDirectoryIndexes && urlObj.extra.resourceIsIndex;
	var removeMatchingResource = urlObj.extra.relation.minimumResource && options.output!==constants.ABSOLUTE && options.output!==constants.ROOT_RELATIVE;
	
	return !!urlObj.resource && !removeMatchingResource && !removeIndex;
}



module.exports = formatUrl;