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Adding Simple HTML5 Caching (every minute) #303

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Adding Simple HTML5 Caching (every minute) #303

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30 changes: 22 additions & 8 deletions tweet/jquery.tweet.js
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Original file line number Diff line number Diff line change
Expand Up @@ -12,6 +12,7 @@
list: null, // [string] optional name of list belonging to username
favorites: false, // [boolean] display the user's favorites instead of his tweets
query: null, // [string] optional search query (see also: http://search.twitter.com/operators)
use_cache: true, // [boolean] use simple HTML5 caching
avatar_size: null, // [integer] height and width of avatar if displayed (48px max)
count: 3, // [integer] how many tweets to display?
fetch: null, // [integer] how many tweets to fetch via the API (set this higher than 'count' if using the 'filter' option)
Expand Down Expand Up @@ -145,7 +146,7 @@
function build_api_url() {
var proto = ('https:' == document.location.protocol ? 'https:' : 'http:');
var count = (s.fetch === null) ? s.count : s.fetch;
var common_params = '&callback=?';
var common_params = '&include_entities=1&callback=?';
if (s.list) {
return proto+"//"+s.twitter_api_url+"/1/"+s.username[0]+"/lists/"+s.list+"/statuses.json?page="+s.page+"&per_page="+count+common_params;
} else if (s.favorites) {
Expand Down Expand Up @@ -227,22 +228,35 @@
$(widget).empty().append(list);
if (s.intro_text) list.before('<p class="tweet_intro">'+s.intro_text+'</p>');
if (s.outro_text) list.after('<p class="tweet_outro">'+s.outro_text+'</p>');

$(widget).trigger("loaded").trigger((tweets.length === 0 ? "empty" : "full"));
if (s.refresh_interval) {
window.setTimeout(function() { $(widget).trigger("tweet:load"); }, 1000 * s.refresh_interval);
}
}


function supports_html5_storage() {
try { return 'localStorage' in window && window['localStorage'] !== null; } catch (e) {return false; }
}

function load(widget) {
var loading = $('<p class="loading">'+s.loading_text+'</p>');
if (s.loading_text) $(widget).not(":has(.tweet_list)").empty().append(loading);
$.getJSON(build_api_url(), function(data){
var tweets = $.map(data.results || data, extract_template_data);
tweets = $.grep(tweets, s.filter).sort(s.comparator).slice(0, s.count);
$(widget).trigger("tweet:retrieved", [tweets]);
});
if(supports_html5_storage() && s.use_cache && window.localStorage["tweetData"]!=null){ //use the cached data
//need an asyc dummy-call
$.get('',function(){extractData(JSON.parse(window.localStorage["tweetData"]), widget);});
}else{ //fetch new data
$.getJSON(build_api_url(), function(data){extractData(data, widget)});
}
}

function extractData(data, widget){
var d = new Date(); var refreshCache = (d.getMinutes()%2 == 0); //refresh every odd minute
if(supports_html5_storage() && s.use_cache && refreshCache) window.localStorage["tweetData"] = JSON.stringify(data); //refresh cache
var tweets = $.map(data.results || data, extract_template_data);
tweets = $.grep(tweets, s.filter).sort(s.comparator).slice(0, s.count);
$(widget).trigger("tweet:retrieved", [tweets]);
}

return this.each(function(i, widget){
if(s.username && typeof(s.username) == "string"){
Expand Down