SharePoint 2013 中开发可以被标记为未读和已读的列表之代码实现篇

本文介绍SharePoint 2013 中开发可以被标记为未读和已读的列表之代码实现,只介绍核心代码,完整代码请到codeplex 下载:http://readmarkablelist.codeplex.com/ 。

 

ReadMarkAction.js：

function EnableUnRead() {
    // Get the client context first
    var ctx = SP.ClientContext.get_current();
    var items = SP.ListOperation.Selection.getSelectedItems(ctx);

    if (items.length == 0) {
        return false;
    }

    // Check whether all the selected items are read, otherwise disable the unread button
    for (i = 0; i < items.length ; i++) {
        var currentItem = items[i];
        for (j = 0; j < listData.Row.length; j++) {
            var currentRow = listData.Row[j];
            if (currentRow.ID == currentItem.id) {
                if (currentRow.Readed != "1") {
                    return false;
                }
            }
        }
    }

    return true;
}

function EnableUnReadContextMenu() {

    // To do: Add your logical for how to determine enable or disable the unread context menu for current item
    // Seems the item context menu don't support EnabledScript, need further investigation here
    return false;
}

function ClickUnReadRibbonButton() {

    // To do: Add your logical for operating the items once the end use click UnReadRibbonButton
    var selectedRows = GetSelectedDataRows();
    var ctx = SP.ClientContext.get_current();
    var readList = ctx.get_web().get_lists().getByTitle("ReadList");
    for (i = 0; i < selectedRows.length; i++) {
        var currentRow = selectedRows[i];
        var deleteItem = readList.getItemById(currentRow.readItemId);
        deleteItem.deleteObject();

        currentRow.Readed = currentRow.readMarkId;
        var readMarkPlaceHolder = document.getElementById(currentRow.Readed);
        BoldItemRow(readMarkPlaceHolder);
    }

    ctx.executeQueryAsync(
        Function.createDelegate(this, this.onDeleteSucceeded),
        Function.createDelegate(this, this.onDeleteFailed)
    );

   
    // alert("ClickUnReadRibbonButton");
}

function ClickUnReadContextMenu() {    
    // Check whether the selected item is read, it not dispaly a message says that message is already unread status
    var ctx = SP.ClientContext.get_current();
    var items = SP.ListOperation.Selection.getSelectedItems(ctx);
    var currentRow;
    for (j = 0; j < listData.Row.length; j++) {
         currentRow = listData.Row[j];
        if (currentRow.ID == items[0].id) {
            if (currentRow.Readed != "1") {
                alert("This item already unread");
                return;
            }

            break;
        }
    }

    // To do: Add your logical for operating the items once the end use click UnReadContextMenu
    // Delete the remarkId from read list currentRow.readItemId
    var readList = ctx.get_web().get_lists().getByTitle("ReadList");
    var deleteItem = readList.getItemById(currentRow.readItemId);
    deleteItem.deleteObject();
    ctx.executeQueryAsync(
        Function.createDelegate(this, this.onDeleteSucceeded),
        Function.createDelegate(this, this.onDeleteFailed)
    );

    // Update the readed property to readMarkId
    currentRow.Readed = currentRow.readMarkId;

    // Update the item row style to bold
    var readMarkPlaceHolder = document.getElementById(currentRow.Readed);
    BoldItemRow(readMarkPlaceHolder);
}

// Bold the item row
function BoldItemRow(readMarkPlaceHolder) {

    readMarkPlaceHolder.innerText = "Unread";
    var parentTR =  getParentNode_TR(readMarkPlaceHolder.parentNode);
    parentTR.style.fontWeight = 'bold';
}

// Handle the on delete successed event
function onDeleteSucceeded() {
}

// Handle the on delete failed event
function onDeleteFailed(sender, args) {
    alert('Request failed. ' + args.get_message() +  '\n' + args.get_stackTrace());

}

// Get the selected data rows
function GetSelectedDataRows() {
    var ctx = SP.ClientContext.get_current();
    var items = SP.ListOperation.Selection.getSelectedItems(ctx);
    var selectdRows = new Array(items.length);    
    for (i = 0; i < items.length ; i++) {
        var currentItem = items[i];
        for (j = 0; j < listData.Row.length; j++) {
            var currentRow = listData.Row[j];
            if (currentRow.ID == currentItem.id) {
                selectdRows[i] = currentRow;
            }
        }
    }

    return selectdRows;
}

ReadMarkFieldType.js

(function () {
    var ReadMarkContext = {};

    // You can provide templates for:
    // View, DisplayForm, EditForm and NewForm
    ReadMarkContext.Templates = {};
    ReadMarkContext.Templates.Fields = {
        "ReadMarkField": {
            "View": ReadMarkViewTemplate,
            "DisplayForm": RenderDisplayFormForReadMark
        }
    };

    SPClientTemplates.TemplateManager.RegisterTemplateOverrides(
        ReadMarkContext
        );
})();

// The ReadMarkViewTemplate provides the rendering logic
//  the custom field type when it is displayed in the view form.
function ReadMarkViewTemplate(ctx) {
    var readMarkId = ctx.listUrlDir.replace(/\//g, "_") + "$" + ctx.CurrentItem.ID + "$" + ctx.CurrentUserId;
    ctx.CurrentItem.Readed = readMarkId;
    ctx.CurrentItem.readMarkId = readMarkId;
    return "data loading";
}

var readMarkIdForDisplayForm;
function RenderDisplayFormForReadMark(ctx)
{
    // var readMarkId = ctx.listUrlDir.replace(/\//g, "_") + "$" + ctx.CurrentItem.ID + "$" + ctx.CurrentUserId;
    // readMarkIdForDisplayForm = readMarkId + "DisplayFormForReadMark";

    // Insert one item into ReadList
    ExecuteOrDelayUntilScriptLoaded(InsertReadMarkItem, "sp.js");

    return "data loading...";
}

// user for storing current user object
var currentUser;
function InsertReadMarkItem()
{
    var ctx = SP.ClientContext.get_current();

    var currentweb = ctx.get_web();
    ctx.load(currentweb);
    currentUser = currentweb.get_currentUser();
    currentUser.retrieve();
    ctx.load(currentweb);
    ctx.executeQueryAsync(onLoadCurrentUserSuccessed, onLoadCurrentUserFailed);    
}

// Once load the current user successfully, then generate the read mark by list name + itemId + currentUserId
function onLoadCurrentUserSuccessed() {
    var currentUserId = currentUser.get_id();
    var itemId = getUrlParam("ID");
    var path = window.location.pathname;
    var index = path.lastIndexOf('/', path.length);
    var listPath = path.substring(0, index);

    var readMarkId = listPath.replace(/\//g, "_") + "$" + itemId + "$" + currentUserId;
    UpdateReadMarkItem(readMarkId);
}

// Insert the read mark into ReadList
function UpdateReadMarkItem(readMarkId) {
    var clientContext = new SP.ClientContext();
    var readList = clientContext.get_web().get_lists().getByTitle("ReadList");
    var itemCreateInfo = new SP.ListItemCreationInformation();
    var readItem = readList.addItem(itemCreateInfo);
    readItem.set_item("Title", readMarkId);
    readItem.update();

    clientContext.load(readItem);
    clientContext.executeQueryAsync(
        Function.createDelegate(this, ReadMarkInsertSuccessed),
        Function.createDelegate(this, ReadMarkInsertFailed)
    );
}

function onLoadCurrentUserFailed(sender, args) {
    alert('Request failed. ' + args.get_message() +
    '\n' + args.get_stackTrace());
}

function ReadMarkInsertSuccessed()
{
    var readMarkIdPlaceHolderForDisplayForm = document.getElementById("readMarkIdPlaceHolderForDisplayForm");
    readMarkIdPlaceHolderForDisplayForm.innerText = "read";
}

function ReadMarkInsertFailed(sender, args) {
    alert('Request failed. ' + args.get_message() +
      '\n' + args.get_stackTrace());
}


function getUrlParam(name) {
    var reg = new RegExp("(^|&)" + name + "=([^&]*)(&|$)");
    var r = window.location.search.substr(1).match(reg);
    if (r != null) return unescape(r[2]); return null;
}

ReadMarkListView.js：

(function () {
    // Initialize the variable that store the objects.
    var overrideCtx = {};
    overrideCtx.Templates = {};
  
     overrideCtx.BaseViewID = 2;
     overrideCtx.ListTemplateType = 10057;

    // Assign a function to handle the
    // PreRender and PostRender events
    overrideCtx.OnPreRender = preRenderHandler;
    overrideCtx.OnPostRender = postRenderHandler;

    // Register the template overrides.
    SPClientTemplates.TemplateManager.RegisterTemplateOverrides(overrideCtx);
})();

var listData;
// This function builds the output for the item template,
// it uses the context object to access announcement data.
function customItem(ctx) {

    // Build a listitem entry for every announcement in the list.
    var ret = "
" + ctx.CurrentItem.Title + "
";
    return ret;
}

// The preRenderHandler handles the 
// OnPreRender event
function preRenderHandler(ctx) {

    // Override the default title with user input
    // ctx.ListTitle = prompt("Type a title", ctx.ListTitle);
}

// The postRenderHandler handles the 
// OnPostRender event
function postRenderHandler(ctx) {
    listData = ctx.ListData;
    ExecuteOrDelayUntilScriptLoaded(RefreshReadMark, "sp.js");
}

// Used for storing list item collection which return by caml query
var collListItem;
var readMarkPlaceHolders;

// Refresh read mark for the list view
function RefreshReadMark()
{
    readMarkPlaceHolders = $(".ReadMarkFiledPlaceHloderClass");
    var clientContext = new SP.ClientContext();
    var targetList = clientContext.get_web().get_lists().getByTitle("ReadList");
    var query = new SP.CamlQuery();
    query.set_viewXml(GenerateCaml(readMarkPlaceHolders));

    collListItem = targetList.getItems(query);
    clientContext.load(collListItem, "Include(Title,ID)");
    clientContext.executeQueryAsync(
         Function.createDelegate(this, onCamlQuerySucceeded),
         Function.createDelegate(this, onCamlQueryFailed)
        );
}

// Generate the caml 
function GenerateCaml(readMarkPlaceHolders) {
    var values ='';
    readMarkPlaceHolders.each(function () {
        values += " " + $(this)[0].id + " "
    });

    return '' +
        '' + values +
        '' +
        '200';
}

function onCamlQuerySucceeded(sender, args)
{
    // Set all rows fontWeight to bold implies these rows are unread
    readMarkPlaceHolders.each(function () {
        $(this)[0].innerText = "Unread";
        var parentTR = getParentNode_TR($(this)[0].parentNode);
        parentTR.style.fontWeight = 'bold';
        
    });

    var listItemEnumerator = collListItem.getEnumerator();

    // Set the rows(which is read) fontWeight to normal implies these rows are read
    while (listItemEnumerator.moveNext()) {
        var readItem = listItemEnumerator.get_current();       
        var currentReadMarkPlaceHolder = document.getElementById(readItem.get_item('Title'));
        currentReadMarkPlaceHolder.innerText = "Read";
        var currentParentTR = getParentNode_TR(currentReadMarkPlaceHolder.parentNode);
        currentParentTR.style.fontWeight = 'normal';

        for (index = 0; index < listData.Row.length; index++) {
            var currentRow = listData.Row[index];
            if (currentRow.Readed == readItem.get_item('Title')) {

                // Set the readed to 1 implies that row has been read by the current user
                // and the unread button in the rbbion area will be enable for this item(row)
                // unread context menu will be enable for this item(row)
                currentRow.Readed = '1';
                currentRow.readItemId = readItem.get_item('ID');
            }
        }
    }
}

// Handle the  caml query failed event
function onCamlQueryFailed(sender, args) {
    alert('Request failed. ' + args.get_message() + '\n' + args.get_stackTrace());
}

// Get the elelemt's TR parent
function getParentNode_TR(parent) {
    while (parent && parent.tagName != 'TR') {
        parent = parent.parentNode;
    }

    return parent;
}