つぶやきの平均文字数を表示するGreasemonkey

twitter-average-length.user.js

// ==UserScript==
// @name           twitter-average-length
// @namespace      http://www.hatena.ne.jp/hitode909
// @include        http://twitter.com/*
// @include        https://twitter.com/*
// ==/UserScript==

(function() {
    var header = document.querySelector('h2.thumb');
    if (!header) return;

    // length
    var average = 0;
    var entries = document.querySelectorAll('.entry-content');

    Array.forEach(entries, function(entry) {
        average += entry.textContent.length;
    });
    average /= entries.length;

    div = document.createElement('div');
    div.textContent = '平均' + Math.floor(average * 100) / 100 + '文字';
    header.appendChild(div);

    // speed
    var timestamps = document.querySelectorAll('.timestamp');
    var top = eval("(" + timestamps[0].getAttribute("data") + ")");
    var bottom = eval("(" + timestamps[timestamps.length - 1].getAttribute("data") + ")");
    var per_tweet = (new Date(top.time).getTime() - new Date(bottom.time).getTime()) / timestamps.length / 1000;
    var maps = [ {size: 60 * 60 * 24, name: "日"}, {size: 60 * 60, name: "時間"}, {size:60, name: "分"}, {size:1, name: "秒"}];

    var map;
    for(var i = 0; i < maps.length; i++) with({m: maps[i]}) {
        console.log([m, per_tweet]);
        if (m.size < per_tweet) {
            map = m;
            break;
        }
    }
    if (!map) map = maps[maps.length - 1];

    div = document.createElement('div');
    div.textContent = Math.floor((per_tweet / map.size) * 100) / 100 + map.name + 'に1回投稿';
    header.appendChild(div);

})();