SP2 Wiki Bot from Kongregate chat

// ==UserScript==
// @name        SP2 Wiki Bot from Kongregate chat
// @description Adds a small input box in the chat to request items definition from the Swords & Potions 2 wiki
// @namespace   *
// @include     http://www.kongregate.com/games/EdgebeeStudios/swords-and-potions-2*
// @version     1
// @grant       GM_xmlhttpRequest
// @grant       GM_log
// @grant       GM_addStyle
// ==/UserScript==

function waitForChat() {
    canary = document.querySelectorAll("div.chat_tabpane.users_in_room.clear")
    if (canary.length > 0) {
        above = document.querySelector("div#chat_window")
        GM_log("going in")
        initInput()
        GM_addStyle("div.chat_message_window {height:458px !important}")

    } else {
        GM_log("wait")
        setTimeout(waitForChat, 1000)
    }
}

waitForChat()

function addMessage(who, msg) {
    spanUsername = document.createElement("span")
    spanUsername.setAttribute("class", "username chat_message_window_username")

    spanUsername.setAttribute("username", who)
    spanUsername.textContent = who

    spanSeparator = document.createElement("span")
    spanSeparator.setAttribute("class", "separator")
    spanSeparator.textContent = ": "

    spanMessage = document.createElement("span")
    spanMessage.setAttribute("class", "message hyphenate")
    spanMessage.setAttribute("id", "sp2wikibot_message")
    GM_addStyle("#sp2wikibot_message {font-style:italic !important}")
    spanMessage.textContent = msg

    spanClear = document.createElement("span")
    spanClear.setAttribute("class", "clear")

    p = document.createElement("p")
    p.appendChild(spanUsername)
    p.appendChild(spanSeparator)
    p.appendChild(spanMessage)
    p.appendChild(spanClear)

    divChat = document.createElement("div")
    divChat.setAttribute("id", "sp2wikibot_divmessage")
    GM_addStyle("#sp2wikibot_divmessage {background-color:#FAEBD7}")  // antiquewhite (maybe try blanchedalmond)
    divChat.appendChild(p)

    messageWindow = document.querySelector("div#chat_rooms_container > div.chat_room_template > div.chat_message_window")
    if (messageWindow.lastChild != null) {
        messageWindow = messageWindow.lastChild
    }

    messageWindow.appendChild(divChat)
}

function initInput() {
    textArea = document.createElement("textarea")
    textArea.setAttribute("class", "chat_input prompt_text")
    textArea.setAttribute("id", "sp2wikibot_textarea")
    GM_addStyle("#sp2wikibot_textarea {height:17px !important; margin-top:10px !important}")
    textArea.textContent = "Enter item:<asked item>"

    divInput = document.createElement("div")
    divInput.setAttribute("class", "chat_controls")
    divInput.setAttribute("id", "sp2wikibot_divinput")
    GM_addStyle("#sp2wikibot_divinput {height:22px !important}")
    divInput.appendChild(textArea)

    divMain = document.createElement("div")
    divMain.setAttribute("id", "sp2wikibot")
    divMain.appendChild(divInput)

    above.appendChild(divMain)

    textArea.addEventListener("keyup", function(event) {parseRequest(event);}, false)
    textArea.addEventListener("click", clickTextareaTheFirstTime, false)
}

function clickTextareaTheFirstTime() {
    textArea.value=""
    textArea.setAttribute("class", "chat_input")
    textArea.removeEventListener("click", clickTextareaTheFirstTime, false)
}

function parseRequest(event) {
    if (event.keyCode == 38 && typeof(lastRequest) !== "undefined") { // up arrow
        textArea.value = lastRequest
        return
    }

    if (event.keyCode != 13) { // enter
        return
    }

    msg = textArea.value.replace(/\n/, "")  // remove line breaks
    addMessage("you", msg)
    textArea.value = ""
    lastRequest = msg

    msgParts = msg.split(":")

    if (msgParts[0].trim() == "item") {
        searchWiki(msgParts[1])
    } else {
        addMessage("bot", "cannot understand the request")
    }
}

// each word gets one and only one upper case letter: the first one
function toTitleCase(str)
{
    return str.replace(/\w\S*/g, function(txt){return txt.charAt(0).toUpperCase() + txt.substr(1).toLowerCase();});
}

//http://www.edgebee.com/wiki/index.php?title=Fire_dagger_Recipe
// =if(trim(G9)="","",hyperlink(CONCATENATE("http://www.edgebee.com/wiki/index.php?title=",substitute(G9," ","_"),"_Recipe"),"W"))
function searchWiki(item) {
    cleanItemName = toTitleCase(item.trim().replace(/ +/g, " "))
    url = "http://www.edgebee.com/wiki/index.php?title="+cleanItemName.replace(/ /, "_")+"_Recipe"
    //GM_log(url)
    GM_xmlhttpRequest({
        method: "GET",
        url: url,
        onload: function( response ) {
            if ( response.status == 200 ) {
                var parser = new DOMParser();
                var responseDoc = parser.parseFromString(response.responseText, "text/html");
                rows = responseDoc.querySelectorAll("table[cellspacing='1'] > tbody > tr")

                nameLevel = rows[0].textContent.trim()
                worker = rows[1].querySelector("td+td").textContent.trim()
                workstation = rows[2].querySelector("td+td").textContent.trim()
                price = rows[3].querySelector("td+td").textContent.trim()
                resources = "Needs: "+rows[6].querySelector("td+td").textContent.trim()
                speed = "Speed: "+rows[7].querySelector("td+td").textContent.trim()
                unlocks = "Unlocks: "+rows[9].querySelector("td+td").textContent.trim()
                unlockedBy = "Unlocked by "+rows[10].querySelector("td+td").textContent.trim()
                recipes = "Needed for Recipes: "+rows[11].querySelector("td+td").textContent.trim()
                quests = "Needed for Quests: "+rows[12].querySelector("td+td").textContent.trim()
                improvements = "Needed for Improvements: "+rows[13].querySelector("td+td").textContent.trim()

                addMessage("sp2wikiBot",
                           nameLevel+" • "+
                           worker+" • "+
                           workstation+" • "+
                           price+" • "+
                           resources+" • "+
                           speed+" • "+
                           unlocks + " • "+
                           unlockedBy + " • "+
                           recipes + " • "+
                           quests + " • "+
                           improvements)
            } else {
                addMessage("sp2wikiBot", "item not found")
            }
        }
    });
}