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/*
* twitter-entities.js
* This function converts a tweet with "entity" metadata
* from plain text to linkified HTML.
*
* See the documentation here: http://dev.twitter.com/pages/tweet_entities
* Basically, add ?include_entities=true to your timeline call
*
* Copyright 2010, Wade Simmons
* Licensed under the MIT license
* http://wades.im/mons
*
* Requires jQuery
*/
function escapeHTML(text) {
return $('<div/>').text(text).html()
}
function linkify_entities(tweet) {
if (!(tweet.entities)) {
return escapeHTML(tweet.text)
}
// This is very naive, should find a better way to parse this
var index_map = {}
$.each(tweet.entities.urls, function(i,entry) {
index_map[entry.indices[0]] = [entry.indices[1], function(text) {return "<a href='"+escapeHTML(entry.url)+"'>"+escapeHTML(entry.display_url)+"</a>"}]
})
$.each(tweet.entities.hashtags, function(i,entry) {
index_map[entry.indices[0]] = [entry.indices[1], function(text) {return "<a href='http://twitter.com/search?q="+escape("#"+entry.text)+"'>"+escapeHTML(text)+"</a>"}]
})
$.each(tweet.entities.user_mentions, function(i,entry) {
index_map[entry.indices[0]] = [entry.indices[1], function(text) {return "<a title='"+escapeHTML(entry.name)+"' href='http://twitter.com/"+escapeHTML(entry.screen_name)+"'>"+escapeHTML(text)+"</a>"}]
})
$.each(tweet.entities.media || [], function(i,entry) {
index_map[entry.indices[0]] = [entry.indices[1], function(text) {return "<img src='"+escapeHTML(entry.media.media_url_https || entry.media_url)+"'></img>"}];
});
var result = ""
var last_i = 0
var i = 0
// iterate through the string looking for matches in the index_map
for (i=0; i < tweet.text.length; ++i) {
var ind = index_map[i]
if (ind) {
var end = ind[0]
var func = ind[1]
if (i > last_i) {
result += escapeHTML(tweet.text.substring(last_i, i))
}
result += func(tweet.text.substring(i, end))
i = end - 1
last_i = end
}
}
if (i > last_i) {
result += escapeHTML(tweet.text.substring(last_i, i))
}
return result
}
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