root/trunk/website/js/relatedposts.js @ 5

/* 
*************************************************************************************************************************************
        30 december : 
                added global js var rememberMe (array)
                added functions updateRememberMe() and checkRememberMe()
                added onclick events to categories/entries boxes
        08 january :
                created init() function and added resetRelatedEntries() function in order to be able to re-call script on 'reset' click
*************************************************************************************************************************************
*/

var field1 = document.editForm.cboRelatedEntriesCats;
var field2 = document.editForm.cboRelatedEntries;

var preselected = 0;

function init() {

        field1.options.length   = 0;
        field2.options.length   = 0;
        
        // populate the categories on initial page load
        for (var i=0; i<categoryArray.length; i++) {
                field1.options[field1.options.length] = new Option(categoryArray[i], categoryArray[i]);
        }
        
        // pre-select categories for this post if it already has related entries stored
        for (var i=0; i<rememberCats.length; i++) {
                for (var j=0; j<field1.options.length; j++) {
                        if (rememberCats[i] == field1.options[j].value) {
                                field1.options[j].selected = true;
                                preselected++;
                                break;
                        }
                }
        }

        if (preselected > 0) {
                doPopulateEntries(0);
                checkRememberEntries();
        }
}

init();

// -------------------------------------------------------------------------------------------- //

function updateRememberEntries() {
        rememberEntries.length = 0;
        for (var i=0; i<field2.options.length; i++) {
                if (field2.options[i].selected == true) {
                        rememberEntries[rememberEntries.length] = field2.options[i].value;
                }
        }
}

function checkRememberEntries() {
        // loop over the rememberEntries array
        for (var i=0; i<rememberEntries.length; i++) {
                // loop over the options in the Entries box
                for (var j=0; j<field2.options.length; j++) {
                        if (rememberEntries[i] == field2.options[j].value) {
                                field2.options[j].selected = true;
                                break;
                        }
                }
        }
}

function doPopulateEntries(sortBy) {
        // populates the entries with the applicable options based on the selected categories
        
        if (field1.selectedIndex == -1) {
                field2.options.length = 0;      // added on 08 january 2005 to remove all entry options if no categories are selected - cjg
                return false;
        }

        if (sortBy == 0) {
                if (document.getElementById('sortLinkDate').style.color == "rgb(128, 128, 128)") {
                        sortBy = "sortByTitle";
                } else {
                        sortBy = "sortByDate";
                }
        }
        
        if (sortBy == "sortByTitle") {
                document.getElementById('sortLinkDate').style.color = "rgb(128, 128, 128)";
                document.getElementById('sortLinkTitle').style.color = "rgb(0, 0, 255)";
        } else {
                document.getElementById('sortLinkTitle').style.color = "rgb(128, 128, 128)";
                document.getElementById('sortLinkDate').style.color = "rgb(0, 0, 255)";
        }
        
        var entryArray = new Array();   // to populate the options
        field2.options.length = null;   // clear out the options
        
        for (var i=0; i<field1.options.length; i++) {
                if (field1.options[i].selected) {
                        for (var j=0; j<categoryArray[field1.options[i].text].length; j++) {
                                apos = entryArray.length;
                                entryArray[apos] = new Array(categoryArray[field1.options[i].text][j].ID, categoryArray[field1.options[i].text][j].title + ' (' + categoryArray[field1.options[i].text][j].posted + ')', categoryArray[field1.options[i].text][j].posted);
                        }
                }
        }

        // dedupe
        entryArrayDeDuped = new Array();
        
        // seed the deduped array with the first element from the entryArray
        entryArrayDeDuped[0]    = new Array();
        entryArrayDeDuped[0][0] = entryArray[0][0];             // id
        entryArrayDeDuped[0][1] = entryArray[0][1];             // title
        entryArrayDeDuped[0][2] = entryArray[0][2];             // date
        
        for (var i=1; i<entryArray.length; i++) {
                
                found = 0;
                for (var j=0; j<entryArrayDeDuped.length; j++) {
                        if (entryArray[i][0] == entryArrayDeDuped[j][0]) {
                                found = 1;
                                break;
                        }
                }
                
                if (found == 0) {
                        thispos = entryArrayDeDuped.length;
                        entryArrayDeDuped[thispos] = new Array();
                        entryArrayDeDuped[thispos][0] = entryArray[i][0];
                        entryArrayDeDuped[thispos][1] = entryArray[i][1];
                        
                        entryArrayDeDuped[thispos][2] = entryArray[i][2];
                }
        }
        
        // sort the deduped array (w00t!)
        function sortByDate(a,b) {
                if (a[2]>b[2]) {
                        return 1;
                } else if (a[2]<b[2]) {
                        return -1;
                } else {
                        return 0;
                }
        }
        
        function sortByTitle(a,b) {
                if (a[1]>b[1]) {
                        return 1;
                } else if (a[1]<b[1]) {
                        return -1;
                } else {
                        return 0;
                }
        }
        if (sortBy == "sortByTitle") {
                entryArrayDeDuped = entryArrayDeDuped.sort(sortByTitle);
        } else {
                entryArrayDeDuped = entryArrayDeDuped.sort(sortByDate);
        }
                
        for (var i=0; i<entryArrayDeDuped.length; i++) {
                field2.options[field2.options.length] = new Option(entryArrayDeDuped[i][1], entryArrayDeDuped[i][0])
        }
        
        checkRememberEntries();
}

function resetRelatedEntries() {
        init();
        
        rememberEntries.length  = 0;    // added 12 january to clear checked entries and allow a true reset - cjg
        field2.selectedIndex    = -1;   // added 12 january to clear checked entries and allow a true reset - cjg
        
        // loop over the original entries array
        for (var i=0; i<originalEntries.length; i++) {
                // loop over the options in the Entries box
                for (var j=0; j<field2.options.length; j++) {
                        if (originalEntries[i] == field2.options[j].value) {
                                field2.options[j].selected = true;
                                // break;
                        } else {
                                field2.options[j].selected = false;
                        }
                }
        }
        updateRememberEntries();                // added 12 january to clear checked entries and allow a true reset - cjg
}