Upload the document using REST API in the SharePoint 2013

Below scripts are used to upload the document using REST API in the SharePoint site.

$(document).ready(function () {
    SP.SOD.executeOrDelayUntilScriptLoaded(waitForCalloutScript, 'SP.js');
   
    $.getScript("/_layouts/15/" + "SP.RequestExecutor.js", function () {
        SP.RequestExecutorInternalSharedUtility.BinaryDecode = function SP_RequestExecutorInternalSharedUtility$BinaryDecode(data) {
            var ret = '';
            if (data) {
                var byteArray = new Uint8Array(data);
                for (var i = 0; i < data.byteLength; i++) {
                    ret = ret + String.fromCharCode(byteArray[i]);
                }
            }
            ;
            return ret;
        };
        SP.RequestExecutorUtility.IsDefined = function SP_RequestExecutorUtility$$1(data) {
            var nullValue = null;
            return data === nullValue || typeof data === 'undefined' || !data.length;
        };
        SP.RequestExecutor.ParseHeaders = function SP_RequestExecutor$ParseHeaders(headers) {
            if (SP.RequestExecutorUtility.IsDefined(headers)) {
                return null;
            }
            var result = {};
            var reSplit = new RegExp('\r?\n');
            var headerArray = headers.split(reSplit);
            for (var i = 0; i < headerArray.length; i++) {
                var currentHeader = headerArray[i];
                if (!SP.RequestExecutorUtility.IsDefined(currentHeader)) {
                    var splitPos = currentHeader.indexOf(':');
                    if (splitPos > 0) {
                        var key = currentHeader.substr(0, splitPos);
                        var value = currentHeader.substr(splitPos + 1);
                        key = SP.RequestExecutorNative.trim(key);
                        value = SP.RequestExecutorNative.trim(value);
                        result[key.toUpperCase()] = value;
                    }
                }
            }
            return result;
        };
        SP.RequestExecutor.internalProcessXMLHttpRequestOnreadystatechange = function SP_RequestExecutor$internalProcessXMLHttpRequestOnreadystatechange(xhr, requestInfo, timeoutId) {
            if (xhr.readyState === 4) {
                if (timeoutId) {
                    window.clearTimeout(timeoutId);
                }
                xhr.onreadystatechange = SP.RequestExecutorNative.emptyCallback;
                var responseInfo = new SP.ResponseInfo();
                responseInfo.state = requestInfo.state;
                responseInfo.responseAvailable = true;
                if (requestInfo.binaryStringResponseBody) {
                    responseInfo.body = SP.RequestExecutorInternalSharedUtility.BinaryDecode(xhr.response);
                }
                else {
                    responseInfo.body = xhr.responseText;
                }
                responseInfo.statusCode = xhr.status;
                responseInfo.statusText = xhr.statusText;
                responseInfo.contentType = xhr.getResponseHeader('content-type');
                responseInfo.allResponseHeaders = xhr.getAllResponseHeaders();
                responseInfo.headers = SP.RequestExecutor.ParseHeaders(responseInfo.allResponseHeaders);
                if (xhr.status >= 200 && xhr.status < 300 || xhr.status === 1223) {
                    if (requestInfo.success) {
                        requestInfo.success(responseInfo);
                    }
                }
                else {
                    var error = SP.RequestExecutorErrors.httpError;
                    var statusText = xhr.statusText;
                    if (requestInfo.error) {
                        requestInfo.error(responseInfo, error, statusText);
                    }
                }
            }
        };
    });  
   
});

// SET THESE INITIAL PARAMETERS
// Name of the category list
var _categoryListTitle = "Template Categories";
// Name of the document Template Library
var _docTemplateListTitle = "New Document Templates"
// Name of the target document library
var _destinationLibTitle = "Project Documents";
var _destinationLibRootFolder = "ProjectDocuments";
// URL of the target document library, set after SP.js is loaded
var _destinationlibUrl = "";
var _destinationlibUrlNew = "";
// document properties file name
var _documentPropertiesFileName = "documentProps.aspx";
var _resultHTML = '';
var _tabHTML = '';
var _ctx;
var _sourceFile;
var _destinationFileUrl;
var _destinationFile;
var _newId
var collListItem;
function waitForCalloutScript() {
 _destinationlibId = window.frameElement.dialogArgs;
 _siteServerRelativeUrl = _spPageContextInfo.siteServerRelativeUrl;
 if (_siteServerRelativeUrl === "/")
  _siteServerRelativeUrl = "";
 //_destinationlibUrl = _siteServerRelativeUrl + "/ProjectDocuments/";
    SP.SOD.executeOrDelayUntilScriptLoaded(BuildTemplateSelectionPanel, 'callout.js');
}
// Build the Document Template tabs
function BuildTemplateSelectionPanel() {
    _ctx = new SP.ClientContext.get_current();
    if (_ctx != undefined && _ctx != null) {
        var _categoryList = _ctx.get_web().get_lists().getByTitle(_categoryListTitle);
  var _sourceList = _ctx.get_web().get_lists().getById(_destinationlibId);
  var _camlQuery = new SP.CamlQuery();
        var _categories = _categoryList.getItems(_camlQuery);
        _ctx.load(_categories);
  _ctx.load(_sourceList, 'Title', 'DefaultViewUrl');
  _ctx.executeQueryAsync(
            function (sender, args) {
    //var _sourceTitle = _sourceList.get_title();
    _destinationlibUrl = ShortenDefaultViewUrl(_sourceList.get_defaultViewUrl());
                _resultHTML += "<div id='tabCategories'><ul>";
                var _categoriesEnumerator = _categories.getEnumerator();
                while (_categoriesEnumerator.moveNext()) {
                    var _categoryItem = _categoriesEnumerator.get_current();
                    _resultHTML += "<li><a href='#" + _categoryItem.get_item('Title').replace(/\s+/g, '') + "'>" + _categoryItem.get_item('Title') + "</a></li>";
                    _tabHTML += "<div catid='" + _categoryItem.get_id() + "' id='" + _categoryItem.get_item('Title').replace(/\s+/g, '') + "'></div>"
                }
                _resultHTML += "</ul>" + _tabHTML + "</div>";
                $('#resultsdiv').empty();
                $('#resultsdiv').append(_resultHTML);
            },
            function (sender, args) {
                alert('Error occured: ' + args.get_message());
            });
        BuildTabs();
    }
}
function ShortenDefaultViewUrl(defaultViewUrl)
{
 var idx = defaultViewUrl.indexOf("/Forms", 1);
 return defaultViewUrl.slice(0,idx + 1);
}
function BuildTabs() {
    var _docTemplateList = _ctx.get_web().get_lists().getByTitle(_docTemplateListTitle);
    var _docTemplateByCategory = new SP.CamlQuery();
    var _docTemplates = _docTemplateList.getItems(_docTemplateByCategory);
    _ctx.load(_docTemplates, 'Include(FileLeafRef, Id,Category,Description0,DocIcon )');
    _ctx.executeQueryAsync(
        function (sender, args) {
            var _docTemplatesEnumerator = _docTemplates.getEnumerator();
            var calloutOptions;
            while (_docTemplatesEnumerator.moveNext()) {
                var _docTemplatesItem = _docTemplatesEnumerator.get_current();
                var _docImageUrl = "/_layouts/15/images/ic" + _docTemplatesItem.get_item('DocIcon') + ".png";
                var _elementId = "docTemp" + _docTemplatesItem.get_id();
                $("div[catid='" + _docTemplatesItem.get_item('Category').get_lookupId() + "']").append("<div id='" + _elementId + "' class='tab-content' style='padding:5px' ><a id='a" + _elementId + "' style='cursor:pointer' onclick=\"selectTemplate('" + _elementId + "','" + _docTemplatesItem.get_id() + "','" + _docTemplatesItem.get_item('DocIcon') + "');\"><img width='16' height='16' title='" + _docTemplatesItem.get_item('FileLeafRef') + "'" +
                            "+alt='" + _docTemplatesItem.get_item('FileLeafRef') + "' src='" + _docImageUrl + "' border='0'/>" + "&nbsp;" + _docTemplatesItem.get_item('FileLeafRef') + "</a></div>")
                calloutOptions = new CalloutOptions();
                calloutOptions.ID = _elementId + 'notificationcallout';
                calloutOptions.launchPoint = document.getElementById('a'+_elementId);
                calloutOptions.beakOrientation = 'topBottom';
                calloutOptions.content = _docTemplatesItem.get_item('Description0');
                calloutOptions.title = _docTemplatesItem.get_item('FileLeafRef');
                var callout = CalloutManager.createNew(calloutOptions);
                callout.set({ openOptions: { event: "hover" } });
                            
            }
            $("#tabCategories").tabs();
        },
         function (sender, args) {
             alert('Error occured: ' + args.get_message());
         });
}
// event for selecting the document template
function selectTemplate(elementid, id, docType) {
    $(".tab-content").css('background-color', 'white');
    $("#" + elementid).css('background-color', 'aqua');
    $("#selectedTemplate").val(id + "-" + docType);
}
// event for creating the document based on template
function CreateDocument() {
    if ((document.getElementById("txtFileName").value).length == 0) {
        alert("FileName should not be empty");
    }
    else if ((document.getElementById("selectedTemplate").value).length == 0) {
        alert("Please select a template for the new file");
    }
    else {
        _ctx = new SP.ClientContext.get_current();
        if (_ctx != undefined && _ctx != null) {
            // Get the Web site that is associated with the client context.
            this.web = _ctx.get_web();
            _ctx.load(this.web);
            // Returns the current list.
            this.sourceList = this.web.get_lists().getByTitle(_docTemplateListTitle);
            _ctx.load(this.sourceList);
            var _currentID = $("#selectedTemplate").val().split("-")[0];
            this.currentItem = sourceList.getItemById(_currentID);
            _ctx.load(this.currentItem);
            // Get the file that is represented by the item from a document library.
            _sourceFile = this.currentItem.get_file();
            _ctx.load(_sourceFile);
            _ctx.executeQueryAsync(Function.createDelegate(this, this.onQuerySucceeded),
                                   Function.createDelegate(this, this.onQueryFailed));
        }
    }
}
function onQuerySucceeded(sender, args) {
    if (_sourceFile != null) {
   
     var _fileName = document.getElementById("txtFileName").value + "." + $("#selectedTemplate").val().split("-")[1];
   
     //Get source file url
     var _sourceFileUrl = _sourceFile.get_serverRelativeUrl();
     var targetExecutor = new SP.RequestExecutor(_spPageContextInfo.webAbsoluteUrl);    
               
     $.ajax({
                url: _spPageContextInfo.webAbsoluteUrl + "/_api/contextinfo",
                type: "POST",
                headers: {
                    "Accept": "application/json;odata=verbose"
                },
                success: function (data) {
                    var digest = data.d.GetContextWebInformation.FormDigestValue;
                    // Build executor action to retrieve the file data.
                    var getFileAction = {
                        url: _spPageContextInfo.webAbsoluteUrl + "/_api/web/GetFileByServerRelativeUrl('" + _sourceFileUrl + "')/$value",
                        method: "GET",
                        binaryStringResponseBody: true,
                        success: function (getFileData) {
                            var notifyId = SP.UI.Notify.addNotification('Copying file... ' + _sourceFile.get_serverRelativeUrl() + ' to ' + _destinationLibTitle, true);
                            // Get the binary data.
                            //var result = data.body;
                            // Build executor action to copy the file data to the new location.
                            var copyFileAction = {
                                url: _spPageContextInfo.webAbsoluteUrl + "/_api/web/getfolderbyserverrelativeurl('"+ _destinationLibRootFolder +"')/Files/Add(url='" + _fileName + "', overwrite=true)",
                                method: "POST",
                                headers: {
                                    "Accept": "application/json; odata=verbose",
                                    "X-RequestDigest": digest
                                },
                                contentType: "application/json;odata=verbose",
                                binaryStringRequestBody: true,
                                body: getFileData.body,
                                success: function (copyFileData) {
                                 SP.UI.Notify.removeNotification(notifyId);
                     SP.UI.Notify.addNotification('File copied successfully', false);                               
                                    var camlQuery = new SP.CamlQuery();
                                    camlQuery.set_viewXml("<View><Query><Where><Eq><FieldRef Name='FileLeafRef'/><Value Type='File'>" + _fileName + "</Value></Eq></Where></Query><RowLimit>1</RowLimit></View>");
                                    var destinationContext = new SP.ClientContext(_spPageContextInfo.webAbsoluteUrl);
                                    var destiantionWeb = destinationContext.get_web();                                  
                                    var projDocumentsList = destiantionWeb.get_lists().getByTitle(_destinationLibTitle);
                                    var collListItem = projDocumentsList.getItems(camlQuery);
                                    destinationContext.load(collListItem);
                                    destinationContext.executeQueryAsync(
                                        function (sender, args) {
                                            var listItemId = '';
                                            var listItemEnumerator = collListItem.getEnumerator();
                                            while (listItemEnumerator.moveNext()) {
                                                var oListItem = listItemEnumerator.get_current();
                                                listItemId = oListItem.get_id();
                                            }
                                            window.location = _spPageContextInfo.webAbsoluteUrl + "/"+ _destinationLibRootFolder +"/" + "Forms/" + _documentPropertiesFileName + "?ID=" + listItemId + "&docurl=" + _spPageContextInfo.webServerRelativeUrl + "/"+ _destinationLibRootFolder +"/"+_fileName;
                                        },
                                        function (sender, args) {
                                            alert('Error occured: ' + args.get_message());
                                        });                                  
                                },
                                error: function (ex) {
                                    //show your 'failed' message
                                     SP.UI.Notify.addNotification('Error copying file', false);
                      SP.UI.Notify.removeNotification(notifyId);
                                     alert(ex);
                                }
                            };
                            targetExecutor.executeAsync(copyFileAction);
                        },
                        error: function (ex) {
                            //fail                           
                            alert(ex);
                        }
                    };
                    targetExecutor.executeAsync(getFileAction);
                },
                error: function (ex) {
                    //fail
        alert(ex);
                }
            });           
    }
}
// Delegate that is called when server operation is completed with errors.
function onQueryFailed(sender, args) {
    alert('Request failed. ' + args.get_message() + '\n' + args.get_stackTrace());
}

Setting Default Value to the Person/Group Column in New/Edit form

By using JavaScript the default value for a person or group column can be set. The below are the steps
(i) Add content Webpart
(ii)Inside that put the following script
(This script will fetch the current username and display it in the people picker which is mentioned in the script)

<script type="text/javascript">
ExecuteOrDelayUntilScriptLoaded(GetUserLoginName, "sp.js");
 var context = null;
    var web = null;
    var currentUser = null;
    var currentUserId=''
function GetUserLoginName() {
 context = new SP.ClientContext.get_current();
        web = context.get_web();
        currentUser = web.get_currentUser();
        currentUser.retrieve();
        context.load(web);
        context.executeQueryAsync(onSuccessMethod, onFaiureMethodl);
}
function onSuccessMethod(sender, args) {
        var userObject = web.get_currentUser();
           AddCurrentUserToPP(userObject.get_title());
    }
  
    function onFaiureMethodl(sender, args) {
        alert('request failed ' + args.get_message() + '\n' + args.get_stackTrace());
    }

function AddCurrentUserToPP(LoginName)
{
var pickerNo = 1;
var pp = getPickerImputElement(pickerNo);
if(pp != null)
{
pp.innerHTML = LoginName;
}
}

function getPickerImputElement(pickerNo)
{
var result = '';
var divs = document.getElementsByTagName('DIV');
var j = 0;
for(var i=0; i < divs.length; i++)
{
if(divs[i].id.indexOf('UserField_upLevelDiv') > 0)
{
j++;
if(j == pickerNo)
{
result = divs[i];
break;
}
}
}
return result;
}</script>

(iii) Stop Editing