User:Mike Dillon/Scripts/params.js: Difference between revisions

Revision as of 03:03, 7 January 2007

Revision as of 16:56, 7 January 2007

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/* <pre><nowiki> */

// function getParameterMap(url): Parses a URL and extracts the query string parameters;

// if no URL is provided, uses the current URL. Caches parsed parameters between invocations.

var getParameterMap = (function () {

// URL parameters cache: key=url, value=paramMap

var urlParamsurlParamMaps = {};

return function (url) {

// If no URL is passed in, use the current page's URL

if (!url) url = ___location.href;

if (urlParams[!url]) return urlParams[url];{

if (!url) url = ___location.href;

}

// If the parameters for this URL have already been parsed, return them

var params = {};

if (urlParamMaps[url]) return urlParamMaps[url];

var search = url.split("?")[1];

// Set up a new map for the parameters to be parsed

var paramsparamMap = {};

// Split the URL from the query string

var search = url.split("?", 2)[1];

if (search) {

// Split query string on "&"

var kvs = search.split("&");

for (var i in kvs) {

// Split each key-value pair on the equals sign

var kv = kvs[i].split("=", 2);

var key = kv[0];

var value = unescape(kv[1]);

if// On the first occurence of a (!params[key]), seed an empty array into {paramMap

if params(!paramMap[key]) = [];{

paramMap[key] = [];

}

params[key].push(// Push the new value); onto the value list for the key in paramMap

paramMap[key].push(value);

}

}

// Cache the paramMap to avoid parsing for all parameter requests

urlParams[url] = params;

returnurlParamMaps[url] params= paramMap;

return paramMap;

};

})();

// function getParameterValues(key, url): Extracts the list of values for a particular key

// from the given URL; if no URL is provided, uses the current URL.

// Returns null if the parameter was not in the URL.

function getParameterValues(key, url) {

return getParameterMap(url)[key];

}

// function getParameterValues(key, url): Extracts the values for a particular key

// from the given URL; if no URL is provided, uses the current URL.

// If there is more than one value for the given key, the first value is returned.

// Returns null if the parameter was not in the URL.

function getParameter(key, url) {

var values = getParameterValues(key, url);

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}

// function getParameterNames(url): Extracts the list of parameter names

// from the given URL; if no URL is provided, uses the current URL.

function getParameterNames(url) {

var names = [];