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blogtoc_unique.js

Uploaded on Jan 02 2010 22:30 by manjunathsinge

// ---------------------------------------------------
// BLOGTOC
// ---------------------------------------------------
// BlogToc creates a clickable Table Of Contents for
// Blogger Blogs.
// It uses the JSON post feed, and create a ToC of it.
// The ToC can be sorted by title or by date, both
// ascending and descending, and can be filtered by
// label.
// ---------------------------------------------------
// Author: Beautiful Beta
// Url: http://beautifulbeta.blogspot.com
// Version: 2
// Date: 2007-04-12
// ---------------------------------------------------

//I have modified this script to suit my needs, find the original script on Beautiful Beta.

// global arrays

var postTitle = new Array(); // array of posttitles
var postUrl = new Array(); // array of posturls
var postDate = new Array(); // array of post publish dates
var postSum = new Array(); // array of post summaries
var postLabels = new Array(); // array of post labels

// global variables
var sortBy = "datenewest"; // default value for sorting ToC
var tocLoaded = false; // true if feed is read and ToC can be displayed
var numChars = 250; // number of characters in post summary
var postFilter = ''; // default filter value

var fixDuplicateFeedIssue = true;

// main callback function

function loadtoc(json) {

function getPostData() {
// this functions reads all postdata from the json-feed and stores it in arrays
if ("entry" in json.feed) {
var numEntries = json.feed.entry.length;
// main loop gets all the entries from the feed
for (var i = 0; i < numEntries; i++) {
// get the entry from the feed
var entry = json.feed.entry[i];

// get the posttitle from the entry
var posttitle = entry.title.$t;

// get the post date from the entry
var postdate = entry.published.$t.substring(0,10);

// get the post url from the entry
var posturl;
for (var k = 0; k < entry.link.length; k++) {
if (entry.link[k].rel == 'alternate') {
posturl = entry.link[k].href;
break;
}
}

// get the post contents from the entry
// strip all html-characters, and reduce it to a summary
if ("content" in entry) {
var postcontent = entry.content.$t;}
else
if ("summary" in entry) {
var postcontent = entry.summary.$t;}
else var postcontent = "";
// strip off all html-tags
var re = /<\S[^>]*>/g;
postcontent = postcontent.replace(re, "");
// reduce postcontent to numchar characters, and then cut it off at the last whole word
if (postcontent.length > numChars) {
postcontent = postcontent.substring(0,numChars);
var quoteEnd = postcontent.lastIndexOf(" ");
postcontent = postcontent.substring(0,quoteEnd) + '...';
}

// get the post labels from the entry
var pll = '';
if ("category" in entry) {
for (var k = 0; k < entry.category.length; k++) {
pll += '<a href="javascript:filterPosts(\'' + entry.category[k].term + '\')" title="Click here to select all posts with label \'' + entry.category[k].term + '\'">' + entry.category[k].term + '</a>; ';
}
var l = pll.lastIndexOf(';');
if (l != -1) { pll = pll.substring(0,l); }
}

// add the post data to the arrays
postTitle.push(posttitle);
postDate.push(postdate);
postUrl.push(posturl);
postSum.push(postcontent);
postLabels.push(pll);
}
}
} // end of getPostData

// start of showtoc function body
// get the number of entries that are in the feed
// numEntries = json.feed.entry.length;

// get the postdata from the feed
getPostData();

// sort the arrays
sortPosts("titleasc");//To fix duplicate entries issue..
sortPosts(sortBy);
tocLoaded = true;
}



// filter and sort functions


function filterPosts(filter) {
// This function changes the filter
// and displays the filtered list of posts

postFilter = filter;
displayToc(postFilter);
} // end filterPosts

function allPosts() {
// This function resets the filter
// and displays all posts

postFilter = '';
displayToc(postFilter);
var toclink = document.getElementById("toclink");
toclink.innerHTML = '<a href="javascript:hideToc();">Hide Table of Contents</a> | <a href="javascript:toggleTitleSort();">Sort by title</a> | <a href="javascript:toggleDateSort();">Sort by date</a> | <a href="javascript:allPosts();">Show all posts</a><br/><a>Click on any of the labels to show posts only in that category.</a>';
} // end allPosts

function sortPosts(sortBy) {
// This function is a simple bubble-sort routine
// that sorts the posts

function swapPosts(x,y) {
// Swaps 2 ToC-entries by swapping all array-elements
var temp = postTitle[x];
postTitle[x] = postTitle[y];
postTitle[y] = temp;
var temp = postDate[x];
postDate[x] = postDate[y];
postDate[y] = temp;
var temp = postUrl[x];
postUrl[x] = postUrl[y];
postUrl[y] = temp;
var temp = postSum[x];
postSum[x] = postSum[y];
postSum[y] = temp;
var temp = postLabels[x];
postLabels[x] = postLabels[y];
postLabels[y] = temp;
} // end swapPosts

for (var i=0; i < postTitle.length-1; i++) {
for (var j=i+1; j<postTitle.length; j++) {
if (sortBy == "titleasc") { if (postTitle[i] > postTitle[j]) { swapPosts(i,j); } }
if (sortBy == "titledesc") { if (postTitle[i] < postTitle[j]) { swapPosts(i,j); } }
if (sortBy == "dateoldest") { if (postDate[i] > postDate[j]) { swapPosts(i,j); } }
if (sortBy == "datenewest") { if (postDate[i] < postDate[j]) { swapPosts(i,j); } }
}
}
} // end sortPosts

// displaying the toc

function displayToc(filter) {
// this function creates a three-column table and adds it to the screen


var numDisplayed = 0;
var tocTable = '';
var tocHead1 = 'POST TITLE';
var tocTool1 = 'Click to sort by title';
var tocHead2 = 'POST DATE';
var tocTool2 = 'Click to sort by date';
var tocHead3 = 'LABELS';
var tocTool3 = '';
if (sortBy == "titleasc") {
tocTool1 += ' (descending)';
tocTool2 += ' (newest first)';
}
if (sortBy == "titledesc") {
tocTool1 += ' (ascending)';
tocTool2 += ' (newest first)';
}
if (sortBy == "dateoldest") {
tocTool1 += ' (ascending)';
tocTool2 += ' (newest first)';
}
if (sortBy == "datenewest") {
tocTool1 += ' (ascending)';
tocTool2 += ' (oldest first)';
}
if (postFilter != '') {
tocTool3 = 'Click to show all posts';
}
tocTable += '<table>';
tocTable += '<tr>';
tocTable += '<td class="toc-header-col1">';
tocTable += '<a href="javascript:toggleTitleSort();" title="' + tocTool1 + '">' + tocHead1 + '</a>';
tocTable += '</td>';
tocTable += '<td class="toc-header-col2">';
tocTable += '<a href="javascript:toggleDateSort();" title="' + tocTool2 + '">' + tocHead2 + '</a>';
tocTable += '</td>';
tocTable += '<td class="toc-header-col3">';
tocTable += '<a href="javascript:allPosts();" title="' + tocTool3 + '">' + tocHead3 + '</a>';
tocTable += '</td>';
tocTable += '</tr>';

var totalPosts = 0;
for (var i = 0; i < postTitle.length; i++) {

//The feed is retrieved first on the main page in order to reduce the time taken by TOC to load.
//when toc page is loaded, somehow, the feed is being populated with duplicate entries, fortunately they appear in sequence!
//following block is used to resolve the redundancy (duplication of entries in the feed) issue
//Just check if the feed has duplicate entries, and don't do anything if there is duplicate entry.

if (postTitle[i] == postTitle[i+1] && postUrl[i] == postUrl[i+1]){
continue;
}

if (filter == '') {
tocTable += '<tr><td class="toc-entry-col1"><a href="' + postUrl[i] + '" title="' + postSum[i] + '">' + postTitle[i] + '</a></td><td class="toc-entry-col2">' + postDate[i] + '</td><td class="toc-entry-col3">' + postLabels[i] + '</td></tr>';
numDisplayed++;
totalPosts++;
} else {
totalPosts++;
z = postLabels[i].lastIndexOf(filter);
if ( z!= -1) {
tocTable += '<tr><td class="toc-entry-col1"><a href="' + postUrl[i] + '" title="' + postSum[i] + '">' + postTitle[i] + '</a></td><td class="toc-entry-col2">' + postDate[i] + '</td><td class="toc-entry-col3">' + postLabels[i] + '</td></tr>';
numDisplayed++;
}
}

}
tocTable += '</table>';
if (numDisplayed == totalPosts) {
var tocNote = '<span class="toc-note">Displaying all ' + totalPosts + ' posts<br/></span>'; }
else {
var tocNote = '<span class="toc-note">Displaying ' + numDisplayed + ' posts labeled \'';
tocNote += postFilter + '\'. Total posts: '+ totalPosts + '<br/></span>';
}
var tocdiv = document.getElementById("toc");
tocdiv.innerHTML = tocNote + tocTable;
} // end of displayToc

function toggleTitleSort() {
if (sortBy == "titleasc") { sortBy = "titledesc"; }
else { sortBy = "titleasc"; }
sortPosts(sortBy);
displayToc(postFilter);
var toclink = document.getElementById("toclink");
toclink.innerHTML = '<a href="javascript:hideToc();">Hide Table of Contents</a> | <a href="javascript:toggleTitleSort();">Sort by title</a> | <a href="javascript:toggleDateSort();">Sort by date</a> | <a href="javascript:allPosts();">Show all posts</a><br/><a>Click on any of the labels to show posts only in that category.</a>';
} // end toggleTitleSort

function toggleDateSort() {
if (sortBy == "datenewest") { sortBy = "dateoldest"; }
else { sortBy = "datenewest"; }
sortPosts(sortBy);
displayToc(postFilter);
var toclink = document.getElementById("toclink");
toclink.innerHTML = '<a href="javascript:hideToc();">Hide Table of Contents</a> | <a href="javascript:toggleTitleSort();">Sort by title</a> | <a href="javascript:toggleDateSort();">Sort by date</a> | <a href="javascript:allPosts();">Show all posts</a><br/><a>Click on any of the labels to show posts only in that category.</a>';
} // end toggleTitleSort


function showToc() {
if (tocLoaded) {

displayToc(postFilter);
var toclink = document.getElementById("toclink");
toclink.innerHTML = '<a href="javascript:hideToc();">Hide Table of Contents</a> | <a href="javascript:toggleTitleSort();">Sort by title</a> | <a href="javascript:toggleDateSort();">Sort by date</a> | <a href="javascript:allPosts();">Show all posts</a><br/><a>Click on any of the labels to show posts only in that category.</a>';


}
else { alert("Just wait... TOC is loading"); }
}

function hideToc() {
var tocdiv = document.getElementById("toc");
tocdiv.innerHTML = '';
var toclink = document.getElementById("toclink");
toclink.innerHTML = '<a href="javascript:showToc();">Show Table of Contents</a> | <a href="javascript:toggleTitleSort();">Sort by title</a> | <a href="javascript:toggleDateSort();">Sort by date</a> | <a href="javascript:allPosts();">Show all posts</a><br/><a>Click on any of the labels to show posts only in that category.</a>';
}

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