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jquery.preview.js
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jquery.preview.js
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/*
* Embedly Preview JQuery v0.0.2
* =============================
* This library allows you to easily create a status or url submisstion tool
* utilizing Embedly's Preview API. For more information see:
*
* Embedly: http://embed.ly
* Embedly Preview API: http://embed.ly/docs/endpoints/1/preview
*
* Requirements:
* -------------
* jquery-1.6 or higher
*
* Usage:
* ------
*
*
*/
(function($){
function log(){
if ($.preview !== undefined && $.preview.debug && window.console){
console.log(Array.prototype.slice.call(arguments));
}
}
/*!
* linkify - v0.3 - 6/27/2009
* http://benalman.com/code/test/js-linkify/
*
* Copyright (c) 2009 "Cowboy" Ben Alman
* Licensed under the MIT license
* http://benalman.com/about/license/
*
* Some regexps adapted from http://userscripts.org/scripts/review/7122
*/
// Turn text into linkified html.
//
// var html = linkify( text, options );
//
// options:
//
// callback (Function) - default: undefined - if defined, this will be called
// for each link- or non-link-chunk with two arguments, text and href. If the
// chunk is non-link, href will be omitted.
//
// punct_regexp (RegExp | Boolean) - a RegExp that can be used to trim trailing
// punctuation from links, instead of the default.
//
// This is a work in progress, please let me know if (and how) it fails!
window.linkify = (function(){
var
SCHEME = "[a-z\\d.-]+://",
IPV4 = "(?:(?:[0-9]|[1-9]\\d|1\\d{2}|2[0-4]\\d|25[0-5])\\.){3}(?:[0-9]|[1-9]\\d|1\\d{2}|2[0-4]\\d|25[0-5])",
HOSTNAME = "(?:(?:[^\\s!@#$%^&*()_=+[\\]{}\\\\|;:'\",.<>/?]+)\\.)+",
TLD = "(?:ac|ad|aero|ae|af|ag|ai|al|am|an|ao|aq|arpa|ar|asia|as|at|au|aw|ax|az|ba|bb|bd|be|bf|bg|bh|biz|bi|bj|bm|bn|bo|br|bs|bt|bv|bw|by|bz|cat|ca|cc|cd|cf|cg|ch|ci|ck|cl|cm|cn|coop|com|co|cr|cu|cv|cx|cy|cz|de|dj|dk|dm|do|dz|ec|edu|ee|eg|er|es|et|eu|fi|fj|fk|fm|fo|fr|ga|gb|gd|ge|gf|gg|gh|gi|gl|gm|gn|gov|gp|gq|gr|gs|gt|gu|gw|gy|hk|hm|hn|hr|ht|hu|id|ie|il|im|info|int|in|io|iq|ir|is|it|je|jm|jobs|jo|jp|ke|kg|kh|ki|km|kn|kp|kr|kw|ky|kz|la|lb|lc|li|lk|lr|ls|lt|lu|lv|ly|ma|mc|md|me|mg|mh|mil|mk|ml|mm|mn|mobi|mo|mp|mq|mr|ms|mt|museum|mu|mv|mw|mx|my|mz|name|na|nc|net|ne|nf|ng|ni|nl|no|np|nr|nu|nz|om|org|pa|pe|pf|pg|ph|pk|pl|pm|pn|pro|pr|ps|pt|pw|py|qa|re|ro|rs|ru|rw|sa|sb|sc|sd|se|sg|sh|si|sj|sk|sl|sm|sn|so|sr|st|su|sv|sy|sz|tc|td|tel|tf|tg|th|tj|tk|tl|tm|tn|to|tp|travel|tr|tt|tv|tw|tz|ua|ug|uk|um|us|uy|uz|va|vc|ve|vg|vi|vn|vu|wf|ws|xn--0zwm56d|xn--11b5bs3a9aj6g|xn--80akhbyknj4f|xn--9t4b11yi5a|xn--deba0ad|xn--g6w251d|xn--hgbk6aj7f53bba|xn--hlcj6aya9esc7a|xn--jxalpdlp|xn--kgbechtv|xn--zckzah|ye|yt|yu|za|zm|zw)",
HOST_OR_IP = "(?:" + HOSTNAME + TLD + "|" + IPV4 + ")",
PATH = "(?:[;/][^#?<>\\s]*)?",
QUERY_FRAG = "(?:\\?[^#<>\\s]*)?(?:#[^<>\\s]*)?",
URI1 = "\\b" + SCHEME + "[^<>\\s]+",
URI2 = "\\b" + HOST_OR_IP + PATH + QUERY_FRAG + "(?!\\w)",
MAILTO = "mailto:",
EMAIL = "(?:" + MAILTO + ")?[a-z0-9!#$%&'*+/=?^_`{|}~-]+(?:\\.[a-z0-9!#$%&'*+/=?^_`{|}~-]+)*@" + HOST_OR_IP + QUERY_FRAG + "(?!\\w)",
URI_RE = new RegExp( "(?:" + URI1 + "|" + URI2 + "|" + EMAIL + ")", "ig" ),
SCHEME_RE = new RegExp( "^" + SCHEME, "i" ),
quotes = {
"'": "`",
'>': '<',
')': '(',
']': '[',
'}': '{',
'»': '«',
'›': '‹'
},
default_options = {
callback: function( text, href ) {
return href ? '<a href="' + href + '" title="' + href + '">' + text + '<\/a>' : text;
},
punct_regexp: /(?:[!?.,:;'"]|(?:&|&)(?:lt|gt|quot|apos|raquo|laquo|rsaquo|lsaquo);)$/
};
return function( txt, options ) {
options = options || {};
// Temp variables.
var arr,
i,
link,
href,
// Output HTML.
html = '',
// Store text / link parts, in order, for re-combination.
parts = [],
// Used for keeping track of indices in the text.
idx_prev,
idx_last,
idx,
link_last,
// Used for trimming trailing punctuation and quotes from links.
matches_begin,
matches_end,
quote_begin,
quote_end;
// Initialize options.
for ( i in default_options ) {
if ( options[ i ] === undefined ) {
options[ i ] = default_options[ i ];
}
}
// Find links.
while ( arr = URI_RE.exec( txt ) ) {
link = arr[0];
idx_last = URI_RE.lastIndex;
idx = idx_last - link.length;
// Not a link if preceded by certain characters.
if ( /[\/:]/.test( txt.charAt( idx - 1 ) ) ) {
continue;
}
// Trim trailing punctuation.
do {
// If no changes are made, we don't want to loop forever!
link_last = link;
quote_end = link.substr( -1 )
quote_begin = quotes[ quote_end ];
// Ending quote character?
if ( quote_begin ) {
matches_begin = link.match( new RegExp( '\\' + quote_begin + '(?!$)', 'g' ) );
matches_end = link.match( new RegExp( '\\' + quote_end, 'g' ) );
// If quotes are unbalanced, remove trailing quote character.
if ( ( matches_begin ? matches_begin.length : 0 ) < ( matches_end ? matches_end.length : 0 ) ) {
link = link.substr( 0, link.length - 1 );
idx_last--;
}
}
// Ending non-quote punctuation character?
if ( options.punct_regexp ) {
link = link.replace( options.punct_regexp, function(a){
idx_last -= a.length;
return '';
});
}
} while ( link.length && link !== link_last );
href = link;
// Add appropriate protocol to naked links.
if ( !SCHEME_RE.test( href ) ) {
href = ( href.indexOf( '@' ) !== -1 ? ( !href.indexOf( MAILTO ) ? '' : MAILTO )
: !href.indexOf( 'irc.' ) ? 'irc://'
: !href.indexOf( 'ftp.' ) ? 'ftp://'
: 'http://' )
+ href;
}
// Push preceding non-link text onto the array.
if ( idx_prev != idx ) {
parts.push([ txt.slice( idx_prev, idx ) ]);
idx_prev = idx_last;
}
// Push massaged link onto the array
parts.push([ link, href ]);
};
// Push remaining non-link text onto the array.
parts.push([ txt.substr( idx_prev ) ]);
// Process the array items.
for ( i = 0; i < parts.length; i++ ) {
html += options.callback.apply( window, parts[i] );
}
// In case of catastrophic failure, return the original text;
return html || txt;
};
})();
function Selector(form, selector) {
//Base Selector
var Selector = {
selector : '.selector',
type : 'small',
template : null,
elem : null,
partials : {
'images_small' : [
'<div class="thumbnail">',
'<div class="controls">',
'<a class="left" href="#">◀</a>',
'<a class="right" href="#">▶</a>',
'<a class="nothumb" href="#">✕</a>',
'</div>',
'<div class="items">',
'<ul class="images">',
'{{#images}}',
'<li><img src="{{url}}"/></li>',
'{{/images}}',
'</ul>',
'</div>',
'</div>'].join(''),
'images_large' : ['<div class="thumbnail">',
'<a class="left" href="#">◀</a>',
'<div class="items">',
'<ul class="images">',
'{{#images}}',
'<li><img src="{{url}}"/></li>',
'{{/images}}',
'</ul>',
'</div>',
'<a class="right" href="#">▶</a>',
'<a class="nothumb" href="#">✕</a>',
'</div>'].join(''),
'attributes' : [
'<a class="title" href="#">{{title}}</a>',
'<p><a class="description" href="#">{{description}}</a></p>'].join(''),
'title' : '<a class="title" href="#">{{title}}</a>',
'description' : '<p><a class="description" href="#">{{description}}</a></p>',
'favicon' : '<img class="favicon" src="{{favicon_url}}">'
},
templates : {
'small': [
'<div class="selector small">',
'{{>images_small}}',
'<div class="attributes">',
'{{>attributes}}',
'<span class="meta">',
'{{>favicon}}',
'<a class="provider" href="{{provider_url}}">{{provider_display}}</a>',
'</span>',
'</div>',
'<div class="action"><a href="#" class="close">✕</a></div>',
'</div>'].join(''),
'large' : [
'<div class="selector large">',
'{{>title}}',
'{{>images_large}}',
'<div class="attributes">',
'{{>description}}',
'<span class="meta">',
'{{>favicon}}',
'<a class="provider" href="{{provider_url}}">{{provider_display}}</a>',
'</span>',
'</div>',
'</div>'].join(''),
'rich': {
'video' : [
'<div class="selector rich">',
'{{>title}}',
'{{>object}}',
'<div class="attributes">',
'{{>description}}',
'<span class="meta">',
'{{>favicon}}',
'<a class="provider" href="{{provider_url}}">{{provider_display}}</a>',
'</span>',
'</div>',
'</div>'].join(''),
'rich' : [
'<div class="selector rich">',
'{{>title}}',
'{{>object}}',
'<div class="attributes">',
'{{>description}}',
'<span class="meta">',
'{{>favicon}}',
'<a class="provider" href="{{provider_url}}">{{provider_display}}</a>',
'</span>',
'</div>',
'</div>'].join(''),
'photo' : [
'<div class="selector rich">',
'{{>title}}',
'{{>object}}',
'<div class="attributes">',
'{{>description}}',
'<span class="meta">',
'{{>favicon}}',
'<a class="provider" href="{{provider_url}}">{{provider_display}}</a>',
'</span>',
'</div>',
'</div>'].join(''),
'link' : [
'<div class="selector rich">',
'{{>images_small}}',
'<div class="attributes">',
'{{>attributes}}',
'<span class="meta">',
'{{>favicon}}',
'<a class="provider" href="{{provider_url}}">{{provider_display}}</a>',
'</span>',
'</div>',
'</div>'].join('')
}
},
// If a developer wants complete control of the selector, they can
// override the render function.
render : function (obj) {
// If the #selector ID is there then replace it with the template. Just
// tells us where it should be on the page.
var template = null;
if (this.template !== null) {
template = this.template;
} else {
template = this.templates[this.type];
}
// A template can be a dict of all the use cases.
if (_.isObject(template)) {
template = template[obj.object_type];
}
var view = this.toView(obj);
var partials = this.toPartials(obj);
var html = Mustache.to_html(template, view, partials);
// If the developer told us where to put the selector, put it there.
if (form.find(this.selector).length) {
this.elem = form.find(this.selector).replaceWith(html);
} else {
this.elem = form.append(html);
}
// We need to keep track of the selector elem so we don't have to do
// form.find(this.selector) all the time.
this.elem = form.find(this.selector);
// Selector may be hidden. Let's show it.
this.elem.show();
// If there are images, set the information in the form.
if (obj.images.length > 0) {
form.find('#id_thumbnail_url').val(encodeURIComponent(obj.images[0].url));
} else {
this.elem.find('.thumbnail').hide();
}
// If there is only one image, hide the left and right buttons.
if (obj.images.length === 1) {
this.elem.find('.left, .right').hide();
}
this.bind();
},
// To View. Only exists to be overwritten basiclly.
toView : function (obj) {
return obj;
},
toPartials : function (obj) {
// Clone partials for later.
var p = $.extend(true, {}, this.partials);
// Set up the object if it's there.
p.object = '';
if (obj.object && (obj.object.type === 'video' || obj.object.type === 'rich')) {
p.object = '<div class="media">{{{html}}}</div>';
} else if (obj.object && obj.object.type === 'photo') {
p.object = '<div class="media"><img src="{{url}}"/></div>';
}
// If there is no favicon, ignore it.
if (!obj.favion_url) {
p.favicon = '';
}
return p;
},
//Clears the selector post submit.
clear : function (e) {
if (e !== undefined) {
e.preventDefault();
}
this.elem.html('');
this.elem.hide();
form.find('input[type="hidden"].preview_input').remove();
},
scroll : function (dir, e) {
e.preventDefault();
var images = this.elem.find('.images');
//Grabs the current 'left' style
var width = parseInt(images.find('li').css('width'), 10);
// Left
var left = parseInt(images.css('left'), 10);
//Gets the number of images
var len = images.find('img').length * width;
//General logic to set the new left value
if (dir === 'left') {
left = parseInt(left, 10) + width;
if (left > 0) {
return false;
}
} else if (dir === 'right') {
left = parseInt(left, 10) - width;
if (left <= -len) {
return false;
}
} else {
log('not a valid direction: ' + dir);
return false;
}
var thumb = encodeURIComponent(images.find('img').eq((left / -width)).attr('src'));
// Puts the current thumbnail into the thumbnail_url input
form.find('#id_thumbnail_url').val(thumb);
// Sets the new left.
images.css('left', left + 'px');
},
nothumb : function (e) {
e.preventDefault();
this.elem.find('.thumbnail').hide();
form.find('#id_thumbnail_url').val('');
},
// When a user wants to Edit a title or description we need to switch out
// an input or text area
title : function (e) {
e.preventDefault();
//overwrite the a tag with the value of the tag.
var elem = $('<input/>').attr({
'value' : $(e.target).text(),
'class' : 'title',
'type' : 'text'
});
$(e.target).replaceWith(elem);
//Set the focus on this element
elem.focus();
// Sets up for another bind.
var t = this.title;
// puts the a tag back on blur. It's a single bind so it will be
// trashed on blur.
elem.one('blur', function (e) {
var elem = $(e.target);
// Sets the New Title in the hidden inputs
form.find('#id_title').val(encodeURIComponent(elem.val()));
var a = $('<a/>').attr({
'class': 'title',
'href' : '#'
}).text(elem.val());
$(e.target).replaceWith(a);
// Bind it back again.
a.bind('click', t);
});
},
//Same as before, but for description
description : function (e) {
e.preventDefault();
//overwrite the a tag with the value of the tag.
var elem = $('<textarea/>').attr({
'class' : 'description'
}).text($(e.target).text());
$(e.target).replaceWith(elem);
//Set the focus on this element
elem.focus();
// Sets up for another bind.
var d = this.description;
// puts the a tag back on blur. It's a single bind so it will be
// trashed on blur.
elem.one('blur', function (e) {
var elem = $(e.target);
// Sets the New Title in the hidden inputs
form.find('#id_description').val(encodeURIComponent(elem.val()));
var a = $('<a/>').attr({
'class': 'description',
'href': '#'
}).text(elem.val());
$(e.target).replaceWith(a);
// Bind it back again.
a.bind('click', d);
});
},
update : function (e) {
this.elem.find('.' + $(e.target).attr('name')).text($(e.target).val());
},
// Binds the correct events for the controls.
bind : function () {
// Thumbnail Controls
this.elem.find('.left').bind('click', _.bind(this.scroll, {}, 'left'));
this.elem.find('.right').bind('click', _.bind(this.scroll, {}, 'right'));
this.elem.find('.nothumb').bind('click', this.nothumb);
// Binds the close button.
this.elem.find('.action .close').bind('click', this.clear);
this.elem.bind('mouseenter mouseleave', function () {
$(this).find('.action').toggle();
});
//Show hide the controls.
this.elem.find('.thumbnail').one('mouseenter', function () {
$(this).bind('mouseenter mouseleave', function () {
$(this).find('.controls').toggle();
});
});
//Edit Title and Description handlers.
this.elem.find('.title').bind('click', this.title);
this.elem.find('.description').bind('click', this.description);
}
};
// Overwrites any funtions
_.extend(Selector, selector);
_.bindAll(Selector);
return Selector;
}
/* Display Allows Developers to Easily build a status or link share from the
* Obj that was created.
*
*
*/
function Display(display){
var Display = {
selector : '#feed',
type : 'small',
template : null,
partials : {
'thumbnail' : ['<div class="thumbnail {{object_type}}">',
'<a href="{{original_url}}" target="_blank">',
'<img title="{{title}}" src="{{thumbnail_url}}"/>',
'<span class="overlay"></span>',
'</a>',
'</div>'].join('')
},
templates : {
'small' : [
'<div class="item">',
'{{>thumbnail}}',
'<div class="attributes">',
'<a class="title" href="{{original_url}}" target="_blank">{{title}}</a>',
'<p class="description">{{description}}</p>',
'<span class="meta">',
'<img class="favicon" src="{{favicon_url}}"/>',
'<a class="provider" href="{{provider_url}}">{{provider_display}}</a>',
'</span>',
'</div>',
'<div class="clearfix"></div>',
'</div>'].join(''),
'status' :[
'<div class="item">',
'<div class="status">{{{status_linked}}}</div>',
'{{>thumbnail}}',
'<div class="attributes">',
'<a class="title" href="{{original_url}}" target="_blank">{{title}}</a>',
'<p class="description">{{description}}</p>',
'<span class="meta">',
'<img class="favicon" src="{{favicon_url}}"/>',
'<a class="provider" href="{{provider_url}}">{{provider_display}}</a>',
'</span>',
'</div>',
'<div class="clearfix"></div>',
'</div>'].join(''),
'rich' : {
'video' :['<div class="item video">',
'<a class="title" href="{{original_url}}" target="_blank">{{title}}</a>',
'{{>object}}',
'<div class="attributes">',
'<p class="description">{{description}}</p>',
'<span class="meta">',
'<img class="favicon" src="{{favicon_url}}"/>',
'<a class="provider" href="{{provider_url}}">{{provider_display}}</a>',
'</span>',
'</div>',
'<div class="clearfix"></div>',
'</div>'].join(''),
'rich' : ['<div class="item rich">',
'<a class="title" href="{{original_url}}" target="_blank">{{title}}</a>',
'{{>object}}',
'<div class="attributes">',
'<p class="description">{{description}}</p>',
'<span class="meta">',
'<img class="favicon" src="{{favicon_url}}"/>',
'<a class="provider" href="{{provider_url}}">{{provider_display}}</a>',
'</span>',
'</div>',
'<div class="clearfix"></div>',
'</div>'].join(''),
'photo' : ['<div class="item photo">',
'<a class="title" href="{{original_url}}" target="_blank">{{title}}</a>',
'{{>object}}',
'<div class="attributes">',
'<p class="description">{{description}}</p>',
'<span class="meta">',
'<img class="favicon" src="{{favicon_url}}"/>',
'<a class="provider" href="{{provider_url}}">{{provider_display}}</a>',
'</span>',
'</div>',
'<div class="clearfix"></div>',
'</div>'].join(''),
'link': ['<div class="item link">',
'{{>thumbnail}}',
'<div class="attributes">',
'<a class="title" href="{{original_url}}" target="_blank">{{title}}</a>',
'<p class="description">{{description}}</p>',
'<span class="meta">',
'<img class="favicon" src="{{favicon_url}}"/>',
'<a class="provider" href="{{provider_url}}">{{provider_display}}</a>',
'</span>',
'</div>',
'<div class="clearfix"></div>',
'</div>'].join('')
}
},
// Will do something with this later.
toView : function(obj){
if (obj.hasOwnProperty('status')){
obj.status_linked = linkify(obj.status);
}
return obj;
},
// Will do something with this later.
toPartials : function(obj){
var p = $.extend(true, {}, this.partials);
if (!obj.thumbnail_url){
p.thumbnail = '';
}
// Set up the object if it's there.
p.object = '';
if (obj.object_type === 'video' || obj.object_type === 'rich'){
p.object = '<div class="media video">{{{html}}}</div>';
} else if (obj.object_type === 'photo' || obj.type === 'image'){
p.object = '<div class="media image"><img alt="{{title}}" src="{{image_url}}"/></div>';
}
if (this.type === 'rich' && obj.object_type !== 'link'){
p.thumbnail = '';
}
return p;
},
//Creates a feed object based on the obj we pass back.
create : function(obj){
var template = null;
// If the developer gives us a template use it.
if (this.template !== null){
template = this.template;
} else{
template = this.templates[this.type];
}
// A template can be a dict of all the use cases.
if (_.isObject(template)){
template = template[obj.object_type];
}
// Allows us to overwrite the view and partials.
var view = this.toView(obj);
var partials = this.toPartials(obj);
var html = Mustache.to_html(template, view, partials);
var e = $(this.selector).prepend(html).children().first();
e.data('preview', obj);
},
play : function(e){
},
bind : function(){
$('.thumbnail.video a, .thumbnail.rich a').live('click', function(e){
e.preventDefault();
var preview = $(this).parents('.item').data('preview');
$(this).parents('.item').replaceWith(preview.html);
});
}
};
_.extend(Display, display);
_.bindAll(Display);
Display.bind();
return Display;
}
/* jQuery Preview - v0.2
*
* jQuery Preview is a plugin by Embedly that allows developers to create tools
* that enable users to share links with rich previews attached.
*
*/
// Base Preview Object. Holds a common set of functions to interact with
// Embedly's Preview endpoint.
function Preview(elem, options) {
//Preview Object that We build from the options passed into the function
var Preview = {
// List of all the attrs that can be sent to Embedly
api_args : ['key', 'maxwidth', 'maxheight', 'width', 'wmode', 'autoplay',
'videosrc', 'allowscripts', 'words', 'chars', 'secure', 'frame'],
// What attrs we are going to use.
display_attrs : ['type', 'original_url', 'url', 'title', 'description',
'favicon_url', 'provider_url', 'provider_display', 'provider_name', 'safe', 'html',
'thumbnail_url', 'object_type', 'image_url'],
default_data : {},
debug : false,
form : null,
type : 'link',
loading_selector : '.loading',
options : {
debug : false,
selector : {},
field : null,
display : {},
preview : {},
wmode : 'opaque',
words : 30,
maxwidth : 560
},
init : function (elem, settings) {
// Sets up options
this.options = _.extend(this.options, typeof settings !== "undefined" ? settings : {});
// Sets up the data args we are going to send to the API
var data = {};
_.each(_.intersection(_.keys(this.options), this.api_args), function (n) {
var v = settings[n];
// 0 or False is ok, but not null or undefined
if (!(_.isNull(v) || _.isUndefined(v))) {
data[n] = v;
}
});
this.default_data = data;
// Just reminds us which form we should be working on.
this.form = null;
if (elem){
this.form = options.form ? options.form : elem.parents('form');
}
//Debug used for logging
this.debug = this.options.debug;
//Sets up Selector
this.selector = Selector(this.form, this.options.selector);
// Sets up display
this.display = Display(this.options.display);
// Overwrites any funtions
_.extend(this, this.options.preview);
// Binds all the functions that you want.
if (elem){
this.bind();
}
},
/*
* Utils for handling the status.
*/
getStatusUrl : function (obj) {
// Grabs the status out of the Form.
var status = elem.val();
//ignore the status it's blank.
if (status === '') {
return null;
}
// Simple regex to make sure the url with a scheme is valid.
var urlexp = /^http(s?):\/\/(\w+:{0,1}\w*)?(\S+)(:[0-9]+)?(\/|\/([\w#!:.?+=&%@!\-\/]))?/;
var matches = status.match(urlexp);
var url = matches? matches[0] : null;
//No urls is the status. Try for urls without scheme i.e. example.com
if (url === null) {
urlexp = /[-\w]+(\.[a-z]{2,})+(\S+)?(\/|\/[\w#!:.?+=&%@!\-\/])?/g;
matches = status.match(urlexp);
url = matches? 'http://'+matches[0] : null;
}
//Note that in both cases we only grab the first URL.
return url;
},
toggleLoading : function () {
this.form.find(this.loading_selector).toggle();
},
callback : function(obj) {
// empty. can be overridden by user
},
//Metadata Callback
_callback : function (obj) {
//tells the loader to stop
this.toggleLoading();
// Here is where you actually care about the obj
log(obj);
// Every obj should have a 'type'. This is a clear sign that
// something is off. This is a basic check to make sure we should
// proceed. Generally will never happen.
if (!obj.hasOwnProperty('type')) {
log('Embedly returned an invalid response');
this.error(obj);
return false;
}
// Error. If the url was invalid, or 404'ed or something else. The
// endpoint will pass back an obj of type 'error'. Generally this is
// were the default workflow should happen.
if (obj.type === 'error') {
log('URL ('+obj.url+') returned an error: '+ obj.error_message);
this.error(obj);
return false;
}
// Generally you only want to handle preview objs that are of type
// `html` or `image`. Others could include `ppt`,`video` or `audio`
// which I don't believe you have a good solution for yet. We could
// wrap them in HTML5 tags, but won't work cross browser.
if (!(obj.type in {'html':'', 'image':''})) {
log('URL ('+obj.url+') returned a type ('+obj.type+') not handled');
this.error(obj);
return false;
}
// If this is a change in the URL we need to delete all the old
// information first.
this.form.find('input[type="hidden"].preview_input').remove();
//Sets all the data to a hidden inputs for the post.
var form = this.form;
_.each(this.display_attrs, function (n) {
var v = null;
// Object type let's us know what we are working with.
if (n === 'object_type') {
if (obj.hasOwnProperty('object') && obj.object.hasOwnProperty('type')) {
v = obj.object.type;
} else{
v = 'link';
}
obj.object_type = v;
}
// Sets up HTML for the video or rich type.
else if (n === 'html') {
if (obj.hasOwnProperty('object') && obj.object.hasOwnProperty('html')) {
v = obj.object.html;
}
}
// Set up the image URL for previews of the ful image.
else if (n === 'image_url') {
if (obj.hasOwnProperty('object') && obj.object.hasOwnProperty('type') && obj.object.type === 'photo') {
v = obj.object.url;
} else if (obj.type === 'image') {
v = obj.url;
}
obj.image_url = v;
}
else {
v = obj[n];
}
var d = {
name : n,
type : 'hidden',
id : 'id_'+n,
value : v
};
// It's possible that the title or description or something else is
// already in the form. If it is then we need to Love them for who they
// are and fill in values.
var e = form.find('#id_'+n);
if(e.length) {
// It's hidden, use it
if (e.attr('type') === 'hidden') {
// jQuery doesn't allow changing the 'type' attribute
delete d.type;
e.attr(d);
} else{
// Be careful here.
if (!e.val()) {
e.val(obj[n]);
} else {
// Use the value in the obj
obj[n] = e.val();
}
// Bind updates to the select.
e.bind('keyup', function (e) {
$.preview.selector.update(e);
});
}
e.addClass('preview_input');
} else{
d['class'] ='preview_input';
form.append($('<input />').attr(d));
}
});
// Now use the selector obj to render the selector.
this.selector.render(obj);
this.callback(obj);
},
// Used as a generic error callback if something fails.
error : function () {
log('error');
log(arguments);
},
// Actually makes the ajax call to Embedly. We make this a seperate
// function because implementations like Chrome Plugins need to overwrite
// how the call is made.
ajax : function(data){
// Make the request to Embedly. Note we are using the
// preview endpoint: http://embed.ly/docs/endpoints/1/preview
$.ajax({
url: 'http://api.embed.ly/1/preview',
dataType: 'jsonp',
data: data,
success: this._callback,
error: this.error
});
},
// Fetches the Metadata from the Embedly API
fetch: function (url) {
// Get a url out of the status box unless it was passed in.
if (typeof url === 'undefined' || typeof url !== 'string') {
url = this.getStatusUrl();
}
// If there is no url return false.
if (url === null) return true;
//We need to trim the URL.
url = $.trim(url);
// If we already looked for a url, there will be an original_url hidden
// input that we should look for and compare values. If they are the
// same we will ignore.
var original_url = this.form.find('#id_original_url').val();
if (original_url === url) {
return true;
}
//Tells the loaded to start
this.toggleLoading();
//sets up the data we are going to use in the request.
var data = _.clone(this.default_data);
data.url = url;
// make the ajax call