TweetDeck Image Assistant

Download/Share Images Faster
当前为 2017-05-18 提交的版本，查看最新版本。
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// ==UserScript==
// @name         TweetDeck Image Assistant
// @namespace    http://ejew.in/
// @version      0.3
// @description  Download/Share Images Faster
// @author       EntranceJew
// @match        https://tweetdeck.twitter.com/*
// @require      https://cdn.rawgit.com/eligrey/FileSaver.js/5ed507ef8aa53d8ecfea96d96bc7214cd2476fd2/FileSaver.min.js
// @noframes
// @grant        none
// ==/UserScript==
/*
0.3 - gif support wasn't that hard
0.2 - removed debug prints, updated mimes, added video download link, instant-spice now grabs videos
0.1 - initial version
*/
 
(function() {
    'use strict';
    
    var wait_for_zoom_delay = 300;
 
    var tool_icon = '<li class="tweet-action-item pull-left margin-r--13 margin-l--1">';
    tool_icon += '<a class="js-show-tip tweet-action position-rel" href="#" rel="spice" title="" data-original-title="Spice It Up">';
    tool_icon += '<i class="icon icon-home icon-home-toggle txt-center"></i> <span class="is-vishidden"> Spice </span>';
    tool_icon += '</a> </li>';
 
    var mime_db = {
        jpeg: "image/jpeg",
        jpg: "image/jpeg",
        gif: "image/gif",
        webp: "image/webp",
        mp4: "video/mp4",
        m3u8: "application/x-mpegURL",
        undefined: "text/plain"
    };
    
    // http://stackoverflow.com/a/2091331
    function getQueryVariable(str, variable) {
        var query = str.substring(1);
        var vars = query.split('&');
        for (var i = 0; i < vars.length; i++) {
            var pair = vars[i].split('=');
            if (decodeURIComponent(pair[0]) == variable) {
                return decodeURIComponent(pair[1]);
            }
        }
        console.log('Query variable %s not found', variable);
    }
 
    function detect_mime(url){
        return mime_db[ /(?:\.([^.]+))?$/.exec(url)[1] ];
    }
 
    function get_img_data( url, on_load ) {
        var xhr = new XMLHttpRequest();
        xhr.open("GET", url);
        xhr.responseType = "blob";
        xhr.onload = on_load;
        xhr.send();
    }
 
    function download_now( url ){
        get_img_data( url, function( e ){
            var img_name = url.substring( url.lastIndexOf('/')+1 );
            var the_blob = new Blob([this.response], {type: detect_mime(url)});
            saveAs( the_blob, img_name.replace(/:orig$/, "") );
        });
    }
 
    function nice_url( url, replacement ){
        replacement = replacement || ":orig";
        var bg = url;
        bg = bg.replace('url(','').replace(')','').replace(/\"/gi, "");
        bg = bg.replace(/:thumb$/, "");
        bg = bg.replace(/:small$/, "");
        bg = bg.replace(/:medium$/, "");
        bg = bg.replace(/:large$/, "");
        return bg;
    }
 
    setInterval(function(){
        $('.stream-item:not([data-ejew])').each(function(){
            var grand_dad = $( this );
 
            /*
            // for appending to the dropdown menu if we wanted that
            var tool_bar = grand_dad.find('.js-dropdown-content > ul');
            tool_bar.prepend('<li class="is-selectable"><a href="#" data-action="ejew">Spice it up</a></li>');
            */
 
            // find all the images and store their links in data
            var images = [];
            grand_dad.find('.js-media-image-link, .js-media .media-image').each( function(i, el){
                images.push( nice_url( $( el ).css('background-image'), ":orig" ) );
            });
            grand_dad.data('ejew-imgs', images);
 
            // make an instance of the toolbar button
            var new_tool = $( tool_icon );
            new_tool.on('click', function(){
                if( grand_dad.find('.is-video').length ){
                    // video spotted
                    var anchor = grand_dad.find('.js-media-image-link');
                    anchor.attr('target', '');
                    anchor.attr('src', '#');
                    anchor.click();
                    setTimeout( function(){
                        $('.js-embeditem').each(function(){
                            var iframe_src = $( this ).find( 'iframe' ).attr('src');
                            var vid_url = getQueryVariable( iframe_src, 'video_url' );
                            download_now( vid_url );
                            $('.icon-close').click();
                        });
                    }, wait_for_zoom_delay);
                } else if( grand_dad.find('.is-gif').length ){
                    // gif spotted
                    download_now( grand_dad.find('video.js-media-gif').attr('src') );
                } else {
                    // images I guess
                    var imgs = grand_dad.data('ejew-imgs');
                    for( var i = 0; i < imgs.length; i++ ){
                        download_now( imgs[i] );
                    }
                }
            });
            // attach
            grand_dad.find('ul.tweet-actions > li:nth-last-child(2)').before( new_tool );
 
            // prevent loading up this element again
            grand_dad.attr('data-ejew', 'in');
        });
 
        // make it so that you can copy image source from previews
        $('img.media-img:not([data-ejew])').each(function(){
            $( this ).attr('src', nice_url( $( this ).attr('src') ) );
            $( this ).attr('data-ejew', 'in');
        });
        
        // provide a download source link in zoomable previews for videos
        $('.js-embeditem:not([data-ejew])').each(function(){
            var iframe_src = $( this ).find( 'iframe' ).attr('src');
            var vid_url = getQueryVariable( iframe_src, 'video_url' );
            var dl_link = $( '<a href="#">Download Source</a>' ); 
            dl_link.on('click', function(){
                download_now( vid_url );
            });
            $(".med-origlink").after( dl_link );
            $( this ).attr('data-ejew', 'in');
        });
    }, 300);
})();