Notebook Newpage Code

<html>
<head>
  <title>Notebook Template Newpage Module</title>
  <meta name="author" content="Timothy Foster" />
  <style type="text/css">
    @import url('/common--bootstrap/3.0.0/bootstrap.min.css');
    @import url('/common--theme/bootstrap-base/css/style.css');
    @import url('/local--theme/standard-yellow/style.css');
    .hidden{  display: none !important; }
  </style>
 
  <script type="text/javascript">
    /**
     *  Notebook Template Newpage Module
     *  By Timothy Foster
     *  Version: 1.00.141004
     *  Allows the user to create a new notebook subpage of a given category
     *  very easily
     **************************************************************************/
    /**
     *  Grab value of a form given an id
     *  @param  __id    The id of the element in the document
     */
    function get(__id){
        return document.getElementById(__id).value;
    }
 
    /**
     *  Takes a query string and turns it into an associative array
     *  @param  query   Query string in the form ?key=value&key=value
     */
    function getURLParameters(query){
        if(query == "")
            return {};
        var obj = {};
        var splitQuery = query.substr(1).split("&");
        for(var i = 0; i < splitQuery.length; ++i){
            var keyvalue = splitQuery[i].split("=");
            if(keyvalue.length != 2)
                continue;
            obj[keyvalue[0]] = decodeURIComponent(keyvalue[1].replace(/\+/g, " "));
        }
        return obj;
    }
 
    /**
     *  URL Parameters
     *  Wikidot replaces .search, so use hash instead
     */
    var URLParams = getURLParameters(window.location.hash.substr(1));
 
    /**
     *  Initialize the page and variables
     */
    function init(){
        setInitialCategory(document.getElementById("notebook-newpage-category"));
    }
 
    /**
     *  Ensures that the inputs are valid
     *  @param    category    The category name
     *  @param    title    The title of the page
     *  @return 0 if valid, otherwise return an integer representing the error
     */
    function validate(category, title){
    //  Category name should begin with a letter
    //  Title must have something in it
        var category_regex = /^[a-z][a-z0-9\-]*$/;
        var title_regex = /^.+$/;
        if(!category_regex.test(category))
            return 1;
        if(!title_regex.test(title))
            return 2;
        return 0;
    }
 
    /**
     *  Function call when the form is submitted
     */
    function submitNNP(){
        try{
            resetErrors();
            var category = get("notebook-newpage-category").toLowerCase();
            var title = get("notebook-newpage-title");
            var validateValue = validate(category, title);
            if(validateValue == 0){
            //  Good input
                title = encodeURI(title);
                var redirectURL = "http://" + URLParams["site"] + ".wikidot.com/" + category + ":" + title + "/edit/true/parentPage/" + URLParams["parent"];
                redirect(redirectURL);
            }
            else if(validateValue == 1){
            //  Invalid category
                document.getElementById("notebook-newpage-category-group").classList.add("has-error");
                writeError("Invalid category");
            }
            else if(validateValue == 2){
            //  Invalid title
                document.getElementById("notebook-newpage-title-group").classList.add("has-error");
                writeError("Invalid Title");
            }
            else{
            //  Unknown error condition
                writeError("Unknown error");
            }
            return false;
        }
        catch(err){
        //  Terribad
            writeError(err.toString());
            return false;
        }
    }
 
    /**
     *  Sets the initial category for the category field
     *  @param    field    The HTML field to populate
     */
    function setInitialCategory(field){
    //  We search for a tag of the form _c:CATEGORY
        var category_regex = /_c:[a-z0-9\-]+/;
        var category = category_regex.exec(URLParams["tags"]);
        if(category === null)
            category = URLParams["category"];
        else{
        //  Remove the _c:
            category = category[0].substr(3);
        }
 
        field.value = category;
    }
 
    /**
     *  Send the user to a different location
     *  @param  url The location to send the user to
     */
    function redirect(url){
        window.parent.location = url;
    }
 
    /**
     *  Reset all error messages so the form appears normal
     */
    function resetErrors(){
        document.getElementById("notebook-newpage-error-group").classList.add("hidden");
        document.getElementById("notebook-newpage-category-group").classList.remove("has-error");
        document.getElementById("notebook-newpage-title-group").classList.remove("has-error");
    }
 
    /**
     *  Writes the message to the screen
     *  @param    message    The error message for debugging purposes
     */
    function writeError(message){
        document.getElementById("notebook-newpage-error-group").classList.remove("hidden");
        document.getElementById("notebook-newpage-error-label").innerHTML = message;
    }
  </script>
 
</head>
<body id="notebook-newpage-body" onload="init()">
<form id="notebook-newpage-form" onsubmit="return submitNNP()" role="form">
  <div id="notebook-newpage-error-group" class="form-group has-error hidden">
    <label id="notebook-newpage-error-label" class="control-label"></label>
  </div>
  <div id="notebook-newpage-category-group" class="form-group">
    <label for="notebook-newpage-category" class="control-label">Category</label>
    <input type="text" class="form-control" id="notebook-newpage-category" />
  </div>
  <div id="notebook-newpage-title-group" class="form-group">
    <label for="notebook-newpage-title" class="control-label">Page Title</label>
    <input type="text" class="form-control" id="notebook-newpage-title" placeholder="Page Title" />
  </div>
  <button type="submit" id="notebook-newpage-submit-button" class="btn btn-primary">Create</button>
</form>
</body>
</html>
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