/*
     * ER Wait Times RSS Reader for the ICU and JavaScript compatible implementations
     *  -- This new version was created to go around the XML cross-domain limitation
     *  -- and the replication issues being experienced by the EHC servers in Cincinnati
     * Date:	04/19/2010 	
     * Version:	2.0
     * Files:
     * 		- ERWaitTimes_CSS.css
     * 		- ERWaitTimes_RSSReader.js
     * 		- ERWaitTimes_SampleImplementation.html
     * Author: 	Gabriel O. Perez
     * 			HCA East Florida Division Inc.
     * 			(954) 767-5767
     */

    /************************************** Global Variables ************************************/
    /********************************* DO NOT MODIFY - DO NOT MODIFY ****************************/
    /*
    * feedFile will be instantiated at class construct, it will contain the file_name for
    * the division's RSS feed. Possible values to follow.
    */


    /*
    * containerName will hold the ID value/name of the container where
    * the results of this script will be sent to.
    * Default value is ErWaitTimes_Container
    * this can be changed to accommodate your already present container name.
    * It is recommended you use the default container name below for support reasons.
    
    *
    * This value is only to be changed by the function BuildWidget(string filterType,
    *                                                        string filterValue,
    *                                                        string containerID) 
    */
    var containerID = 'ErWaitTimes_Container';

    /*
    * filterType will contain the type of filter to be applied
    * possible values are: 
    * 	facility
    *  	market
    *  	division
    *  	city
    *  	state
    * 
    * The default value is an empty string so the behaviour would be to return all
    * available facilities within the RSS feed. No filters
    
    *
    * This value is only to be changed by the function BuildWidget(string filterType,
    *                                                        string filterValue,
    *                                                        string containerID) 
    */
     var filterType = '';

    /*
    * filterValue will contain the value to be looked for within the feed.
    * filterValue must match the actual value contained within the feed.
    * if filterType = market, then filterValue = NameOfTheMarketDesired <category> element
    * if filterType = facility, then filterValue = NameOfTheFacilityDesired <title> element
    * if filterType = division, then filterValue = NameOfTheDivision <division> element
    * if filterType = city, then filterValue = NameOfCity <address> element
    * if filterType = state, then filterValue = StateAbbreviation <address> element
    *
    * The default value is an empty string so the behaviour would be to return all
    * available facilities within the RSS feed. No filters
    
    *
    * This value is only to be changed by the function BuildWidget(string filterType,
    *                                                        string filterValue,
    *                                                        string containerID) 
    */
    var filterValue = '';
    
    /*
     * contingencyMessage will contain the message as approved by HCA's Internal audit to be
     * displayed in case the wait time is no longer in compliance. Compliance for an RSS Reading 
     * system is defined as the time being accurate as of no more than 90 minutes from the time
     * the reading system reads the feed.
     */   
    var contingencyMessage ='updating';
    
    var gObjFeed;

    var dataAvailable = false;
    
    var rssFeedFile = '';

    /*******************************************************************************************/


    /************************************* Private Functions ********************************************/

    function ErWaitTimesRssReader(divisionRssFeedFile) {
        setRssFeedFile(divisionRssFeedFile);
        GetErWaitTimes();
    }

    function BuildWidget(objFeed, filterType, filterValue, containerID) {
        setObjFeed(objFeed);
        setFilterAndContainer(filterType, filterValue, containerID);
        ParseERWaitTimes();
    }
    
    /*
     * function setContainerID overrides the default container id of ErWaitTimes_Container to
     * the desired container name.Useful when wanting to put different result sets in different containers.
     */

    function setContainerID(newContainerID) {
        this.containerID = newContainerID ? newContainerID : 'ErWaitTimes_Container';
    }

    function getContainerID() {
        return containerID;
    }

    /*
    * function set/get FilterType And FilterValue overrides the default filter values set by the global variables
    * which currently are empty strings. This function is useful if you are going to call the script
    * multiple times but want to use different filters each time or if you want to give the user the 
    * option of choosing what they want to see from what is available.
    */

    function setFilterType(newFilterType) {
        this.filterType = newFilterType ? newFilterType : '';
    }

    function getFilterType() {
        return this.filterType;
    }

    function setFilterValue(newFilterValue) {
        this.filterValue = newFilterValue ? newFilterValue : '';
    }

    function getFilterValue() {
        return this.filterValue;
    }

    function setFilterTypeAndValue(newFilterType, newFilterValue) {
        setFilterType(newFilterType);
        setFilterValue(newFilterValue);
    }

    /*
    * function setFilterAndContainer overrides the default filter and container ID values in one shot
    */
    function setFilterAndContainer(newFilterType, newFilterValue, newContainerID) {
        setContainerID(newContainerID);
        setFilterTypeAndValue(newFilterType, newFilterValue);
    }
    
    function setRssFeedFile(rssFeedFile){
        this.rssFeedFile = rssFeedFile;
    }
    
    function getRssFeedFile(){
        return this.rssFeedFile;
    }

    function setDataAvailable(available) {
        this.dataAvailable = available;
    }

    function isDataAvailable() {
        return this.dataAvailable;
    }

    function setObjFeed(newObjFeed) {
        this.gObjFeed = newObjFeed;
        setDataAvailable(true);
    }

    function getObjFeed() {
        return this.gObjFeed;
    }
    
    function setContingencyMessage(newMessage){
    	this.contingencyMessage = newMessage ? newMessage : 'updating';
    }
    
    function getContingencyMessage(){
    	return this.contingencyMessage;
    }
 

    function getFullDate(dateString) {
        return new Date(dateString).toLocaleDateString();
    }

    function getTime(dateString) {
        return new Date(dateString).toLocaleTimeString();
    }

    function getFullDateTime(dateString) {
        return getFullDate(dateString) + ' ' + getTime(dateString);
    }

    function getAbbrDate(dateString) {
        return new Date(dateString).toDateString();
    }

    function getAbbrDateTime(dateString) {
        return getAbbrDate(dateString) + ' ' + getTime(dateString);
    }

    function isStaleWaitTime(dateString) {
    	var currLocalDate = new Date();
    	return ((currLocalDate.getTime()-Date.parse(dateString)) >=5400000) ? true : false;
    }

    function contingencyWaitTimeCheck(erWaitTime,dateString) {
    	return (erWaitTime == '---' || isStaleWaitTime(dateString)) ? getContingencyMessage() : erWaitTime;
    }

    String.prototype.trim = function() {
        return this.replace(/^\s+|\s+$/g, "");
    };
    
    String.prototype.ltrim = function() {
        return this.replace(/^\s+/, "");
    };
    
    String.prototype.rtrim = function() {
        return this.replace(/\s+$/, "");
    };

    function GetErWaitTimes() {
        GetErWaitTimesFeed(getRssFeedFile());
    }

    function getCacheBuster() {
        var currentDateTime = new Date();
        return (currentDateTime.getFullYear() +
            '' + (currentDateTime.getMonth() + 1) +
            '' + currentDateTime.getDate() +
            '' + currentDateTime.getHours() + 
            '' + (currentDateTime.getMinutes() / 10).toString().substring(0, 1));
    }

    function GetErWaitTimesFeed(divisionFeedFile) {
        setDataAvailable(false);
        var currentDateTime = new Date();
        var source = 'http://query.yahooapis.com/v1/public/yql?q=' +
                     'select%20*%20from%20rss%20where%20url%3D%22http%3A%2F%2F' +
                     'eastflamkt.two.icu.ehc.com%2Fcpm%2Frss%2F' + divisionFeedFile +
                     '%22&rnd=_' + getCacheBuster() + '&format=json&callback=loadWidgets';
        var s = document.createElement('script');
        s.setAttribute('src', source);
        document.getElementsByTagName('head')[0].appendChild(s);
    }


    /*
    * function ParseERWaitTimesFeed will take an object and parse through it's 
    * values, assign all available feed fields into variables and then append 
    * to the output variable the chosen fields for the particular filter when
    * a filter match is found.
    */
    function ParseERWaitTimes() {
        ParseERWaitTimesFeed(getObjFeed());
    }

    function ParseERWaitTimesFeed(objFeed) {
         /* facilities will contain all the items (facilities) and elements(facility data) of the object */
        var facility = objFeed.query.results.item;
        /* lets clean our output here */
        var output = '';
        /* retrieving the number of items within the items object */
        var noOfItems = facility.length;
        /* iterate through each item and grab all available elements */
        for (var i = 0; i < noOfItems; i++) {
            var facilityName = facility[i].title; 		            								//facility name
            var asOfDateTime = getAbbrDateTime(facility[i].pubDate); 								//facility's wait time accuracy date/time
                                                                    								//for non-abbreviated version, use
                                                                    								//getFullDateTime(facility[i].pubDate);          
            var facilityURL = facility[i].link; 			        								//facility's web site URL
            var erWaitTime = facility[i].description;	//facility's ER wait time
            var facilityPhoneNumber = facility[i].phone;            								//facility's phone number
            var facilityAddres = facility[i].address; 	           									//facility's full address
            var division = facility[i].division; 		            								//facility's division
            var market = facility[i].category; 			            								//facility's market
            var title = facility[i].comments; 			            								//description of feed data
            var address = facility[i].address.split(',');           								//facility's address array
            var street = address[0]; 					            								//facility's street
            var city = address[1]; 						            								//facility's city
            var state = address[2].substring(1, 3); 		        								//facility's state
           
            /*
            * The following statement will only concatenate the data for those items
            * that match the filter selected. If errors or no filters are defined, the default would be
            * to include the entire content of the RSS feed.
            * 
            * Each filterType contains it's own independent "output" format so you are free to use
            * whichever elements from above within your output and use any HTML formatting/elements 
            * per filterType.
            */
            switch (getFilterType()) {
                case 'city':
                    if (city.toLowerCase().trim() == getFilterValue().toLowerCase().trim()) { output += "<h3><a href='" + facilityURL + "'>" + facilityName + "</a></h3>" + erWaitTime + "As of: " + asOfDateTime + "<hr/>"; };
                    break;
                case 'state':
                    if (state.toLowerCase().trim() == getFilterValue().toLowerCase().trim()) { output += "<h3><a href='" + facilityURL + "'>" + facilityName + "</a></h3>" + erWaitTime + "As of: " + asOfDateTime + "<hr/>"; };
                    break;
                case 'facility':
                    if (facilityName.toLowerCase().trim() == getFilterValue().toLowerCase().trim())
                    { output += "<FONT color=#ffffff><I><A style='CURSOR: help' href='/CustomPage.asp?guidCustomContentID={CBCA4FB3-9367-4BC9-9827-28FC10ED88B7}'><DIV id=info-link></DIV></A><DIV id=pubdate>" + asOfDateTime + "</DIV></I><DIV style='OVERFLOW: auto; WIDTH: 163px; HEIGHT: 30px'><DIV id=facility>" + facilityName + "</DIV><DIV id=wait-time>"+erWaitTime+"</DIV></DIV></FONT>"; };
                    break;
                case 'market':
                    if (market.toLowerCase().trim() == getFilterValue().toLowerCase().trim()) { output += "<h3><a href='" + facilityURL + "'>" + facilityName + "</a></h3>" + erWaitTime + "As of: " + asOfDateTime + "<hr/>"; };
                    break;
                case 'division':
                    if (division.toLowerCase().trim() == getFilterValue().toLowerCase().trim()) { output += "<h3><a href='" + facilityURL + "'>" + facilityName + "</a></h3>" + erWaitTime + "As of: " + asOfDateTime + "<hr/>"; };
                    break;
                default:
                    output += "<h3><a href='" + facilityURL + "'>" + facilityName + "</a></h3>" + erWaitTime + "As of: " + asOfDateTime + "<hr/>";
            }

        }
        /* Places the results within the container defined within the Global Variables at the beginning of this file tag */
        document.getElementById(getContainerID()).innerHTML = output;
    }
    /*******************************************************************************************/