Meme text userscript for IRCCloud

mirccloud.meme.user.js

// ==UserScript==
// @name mirccloud.meme.user.js
// @namespace https://github.com/dpedu/mirccloud
// @description Meme Text for IRCCloud
// @downloadURL https://raw.githubusercontent.com/dpedu/mirccloud/master/mirccloud.meme.user.js
// @version 0.1
// @match https://www.irccloud.com/*
// @noframes
// @grant none
// ==/UserScript==


COMMAND = '/meme';


function checkCommand(inputData) {
    if(inputData.startsWith(COMMAND)) {
        return inputData.substring(COMMAND.length + 1).toUpperCase()
    }
    return false;
}


(function() {
    function init() {
        var context = window.SESSIONVIEW.mainArea.current.input.__proto__.say;
        window.SESSIONVIEW.mainArea.current.input.__proto__.say = function(inputData) {
            var data = checkCommand(inputData);
            if (data === false) {
                context.apply(this, [inputData]);
            } else {
                this.clear();
                var output = []
                var last = false;
                for(var i=0;i<data.length;i++) {
                    var ccode = data.charCodeAt(i)
                    if(65 <= ccode && ccode <= 90 && last) {  // randBool()
                        output.push(String.fromCharCode(ccode + 32));
                    } else output.push(data[i]);
                    last = !last;
                }
                context.apply(this, [output.join('')]);
            }
        };
    }

    (function checkSession() {
        if (window.hasOwnProperty('SESSION')) {
            if (window.SESSION.initialized) {
                init();
            } else {
                window.SESSION.bind('init', function() {
                    init();
                });
            }
        } else {
            window.setTimeout(checkSession, 100);
        }
    })();
})();


function randChoice(choices) {
    return choices[Math.floor(Math.random() * choices.length)];
}


function randBool() {
    return randChoice([true, false])
}