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(function($){ | |
// Store fetched long URLs here. | |
var cache = {}; | |
$.longUrl = function( url, callback, options ) { | |
// Override defaults with specified options. | |
options = $.extend( {}, $.longUrl.options, options ); | |
var params = {}; | |
if ( cache[ url ] ) { | |
// URL exists in cache, so use it. | |
callback( cache[ url ] ); | |
} else { | |
params[ options.param ] = url; | |
// Fetch JSON data. | |
$.getJSON( options.api_url, params, function(data){ | |
if ( data[ url ] ) { | |
// If the data is valid, update the cache. | |
cache[ url ] = data[ url ]; | |
// Call `callback` for this element + long url. | |
callback( cache[ url ] ); | |
} | |
}); | |
} | |
}; | |
$.fn.longUrl = function( options ) { | |
// Override defaults with specified options. | |
options = $.extend( {}, $.longUrl.options, options ); | |
return this.each(function(){ | |
var elem = $(this), | |
url = elem.attr( options.attr ); | |
// Fetch long URL and call `lengthen` when done. | |
$.longUrl( url, function( long_url ){ | |
options.lengthen( elem, long_url ); | |
}, options ); | |
}); | |
}; | |
// Some sensible defaults. | |
$.longUrl.options = { | |
api_url: 'http://www.longurlplease.com/api/v1.1?callback=?', | |
param: 'q', | |
attr: 'href', | |
lengthen: function( elem, url ) { | |
// Update the element's title attribute with `url`. | |
elem.attr( 'title', url ); | |
} | |
}; | |
})(jQuery); |
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