9tut Q&A Mod 0.4a

// ==UserScript==
// @name       Q&A Mod
// @version    0.4a
// @description  //
// @match      http*://*.9tut.com/*
// @match      http*://*.9tut.net/*
// @match      http*://*.digitaltut.com/*
// @match      http*://*.certprepare.com/*
// @match      http*://*.networktut.com/*
// @match      http*://*.voicetut.com/*
// @match      http*://*.securitytut.com/*
// @match      http*://*.wirelesstut.com/*
// @match      http*://*.dstut.com/*
// @match      http*://*.rstut.com/*
// @copyright  Public Domain
// ==/UserScript==

var correctAns = [];

formatQASection("ccnacorrectanswers", "Answer");
formatQASection("ccnaquestionsnumber", "Question");
formatQASection("ccnaexplanation", "Explanation");

function findClass(node) {
    if((node.className == "ccnaexplanation") || (node.className == "ccnaquestionsnumber") || (node.className == "ccnacorrectanswers")) {
        if(node.innerHTML.trim() != "")
            return true;
    }

    var result = false;

    if(node.childNodes.length > 0) {
        var i;
        for(i=0; i < node.childNodes.length; i++) {
            result = findClass(node.childNodes[i]);
            if(result)
                break;
        }
    }

    return result;
}

function formatQASection(className, secName) {
    var c = document.getElementsByClassName("post");
    var x = c[0].getElementsByClassName(className);
    var qaCount = 0;

    for (i = 0; i < x.length; i++) {
        if(x[i].innerHTML.trim() == "") continue;

        var newNodeFix = x[i];
        while(newNodeFix.parentNode) {
            if(newNodeFix.parentNode.className != "content" && newNodeFix.parentNode.tagName != "DIV")
                newNodeFix = newNodeFix.parentNode;
            else
                break;
        }

        var newP = document.createElement("P");

        var newNode = null;
        var newNode2 = null;

        if(className == "ccnaquestionsnumber") {
            newNode = newNodeFix.parentNode.insertBefore(newP, newNodeFix.nextSibling);
            var answers = [];
            var ansCount = -1;
            var str;
            var newAnsNode = null;

            if(correctAns[qaCount]) {
                while(newNode.nextSibling) {
                    if(findClass(newNode.nextSibling)) {
                        break;
                    } else {
                        newNode2 = newNode.appendChild(newNode.nextSibling);

                        if(newNode2.nodeType == 1) {
                            str = newNode2.innerText;

                            var matches = str.match(/^\s*([A-K]\s*(\.|\-|\–|\—)).*(?!\?){1}/gm);
                            if(matches) {
                                if(matches.length >= 1) {
                                    var lines = str.split(/\n/);
                                    for(l=0;l< lines.length;l++) {
                                        if(/^(\s*)(([A-K]\s*(\.|\-|\–|\—)){1}.*)/.test(lines[l])) {
                                            ansCount++;
                                            answers[ansCount] = lines[l].trim();
                                            if(!newAnsNode) {
                                                var newAnsP = document.createElement("P");
                                                newAnsNode = newNode.appendChild(newAnsP);
                                            }
                                        } else {
                                            if(ansCount < 0) {
                                                var newQuestP = document.createElement("P");
                                                newQuestP.innerHTML = lines[l];
                                                newNode.appendChild(newQuestP);
                                                continue;
                                            }
                                            str = lines[l].trim();
                                            if(str != "")
                                                answers[ansCount] += str + "<br>";
                                        }
                                    }
                                    newNode.removeChild(newNode2);
                                }
                            }
                        }
                    }
                }

                if(newAnsNode) {
                    str = "<table>";
                    if(correctAns[qaCount].length == 1) {
                        for(a=0;a<answers.length;a++) {
                            str += "<tr id=ansSelect" + (qaCount+1) + answers[a].charAt(0) + ">\n<td><input type=\"radio\" name=\"ansRadio" + (qaCount+1) + "\"></td>\n<td>" + answers[a] + "</td>\n</tr>\n"
                        }
                    } else {
                        for(a=0;a<answers.length;a++) {
                            str += "<tr id=ansSelect" + (qaCount+1) + answers[a].charAt(0) + ">\n<td><input type=\"checkbox\"></td>\n<td>" + answers[a] + "</td>\n</tr>\n"
                        }
                    }
                    str += "</table>\n"
                    newAnsNode.innerHTML  = str;
                } else
                    qaCount--;
            }
        } else {
            newNode = newNodeFix.parentNode.insertBefore(newP, newNodeFix);

            var newDiv = document.createElement ("DIV");
            newDiv.style.display = "none";

            var newButton = document.createElement("INPUT");
            newButton.setAttribute("type", "button");
            newButton.value = "Show "+secName;
            if(className == "ccnacorrectanswers") {
                var ansCorrect = newNodeFix.innerText.match(/[A-K](?!\w)/gm);
                if(ansCorrect) {
                    correctAns[qaCount] = ansCorrect;
                    newButton.onclick = (function (qaCount, ansCorrect) {
                        return function() {
                            if(this.nextSibling.style.display != "none") {
                                this.value = "Show "+secName;
                                this.nextSibling.style.display = "none";
                                if(ansCorrect) {
                                    for(x=0;x<ansCorrect.length;x++)
                                        document.getElementById("ansSelect" + (qaCount+1) + ansCorrect[x]).style.backgroundColor = "";
                                }
                            } else {
                                this.value = "Hide "+secName;
                                this.nextSibling.style.display = "block";
                                if(ansCorrect) {
                                    for(x=0;x<ansCorrect.length;x++)
                                        document.getElementById("ansSelect" + (qaCount+1) + ansCorrect[x]).style.backgroundColor = "limegreen";
                                }
                            }
                        }
                    })(qaCount,ansCorrect);
                } else {
                    newButton.onclick = function (){
                        if(this.nextSibling.style.display != "none") {
                            this.value = "Show "+secName;
                            this.nextSibling.style.display = "none";
                        } else {
                            this.value = "Hide "+secName;
                            this.nextSibling.style.display = "block";
                        }
                        return false;
                    };
                    qaCount--;
                }
            } else {
                newButton.onclick = function (){
                    if(this.nextSibling.style.display != "none") {
                        this.value = "Show "+secName;
                        this.nextSibling.style.display = "none";
                    } else {
                        this.value = "Hide "+secName;
                        this.nextSibling.style.display = "block";
                    }
                    return false;
                };
            }

            newNode.appendChild(newButton);

            newNode2 = newNode.appendChild(newDiv);
            newNode2.appendChild(newNodeFix);

            while(newNode.nextSibling) {
                if(findClass(newNode.nextSibling))
                    break;
                else
                    newNode2.appendChild(newNode.nextSibling);
            }
        }
        qaCount++;
    }
}