jrtechs-NodeJSBlog/templates/blog/blogMain.html

{>header}

<script src="https://code.jquery.com/jquery-3.3.1.min.js"
    integrity="sha256-FgpCb/KJQlLNfOu91ta32o/NMZxltwRo8QtmkMRdAu8="
    crossorigin="anonymous">
</script>

<script>

    var postsToLoad= [];

    /**
     * Runs a get request using ajax
     */
    function runAjax(url, successCallBack, errorCallBack)
    {
        console.log(url);
        $.ajax({
            type:'GET',
            url: url,
            crossDomain: true,
            dataType: "json",
            success: successCallBack,
            error:errorCallBack,
            timeout: 3000
        });
    }

    /** Lazy loads youtube videos on the page
     */
    function lazyLoad()
    {
        var youtube = document.querySelectorAll( ".youtube" );

        for (var i = 0; i < youtube.length; i++) {

            var source = "https://img.youtube.com/vi/"+ youtube[i].dataset.embed +"/sddefault.jpg";

            var image = new Image();
            image.src = source;
            image.addEventListener( "load", function() {
                youtube[ i ].appendChild( image );
            }( i ) );

            youtube[i].addEventListener( "click", function() {

                var iframe = document.createElement( "iframe" );

                iframe.setAttribute( "frameborder", "0" );
                iframe.setAttribute( "allowfullscreen", "" );
                iframe.setAttribute( "src", "https://www.youtube.com/embed/"+ this.dataset.embed +"?rel=0&showinfo=0&autoplay=1" );

                this.innerHTML = "";
                this.appendChild( iframe );
            } );
        };
    }

    function buildPostHTML(post)
    {
        var pic = '';
        if(post.hasPicture)
        {
            pic = '<img src="/content/headerImages/' + post.picture_url + '" style="width:100%;">';
        }
        return '<div class="blogPost">' + pic + '<div class="p-4"><b><h3>' + post.name + '</h3></b><h5>' + post.published + '</span></h5><div>' + post.blogBody + '<p class="text-center"><a class="btn btn-secondary btn-lg text-white" href="https://jrtechs.net/' + post.categoryURL + '/' + post.url + '"><b>Read More &raquo;</b></a></p></div></div></div><br><br>';
    }

    function addPosts(id)
    {
        return new Promise(function(resolve, reject)
        {
            runAjax("/api/preview/" + id,
                (html)=>
            {
                var content = buildPostHTML(html)

                $("#newPosts").append(content);
                //lazy loads youtube videos
                //lazyLoad();

                //highlights code
                Prism.highlightAll();

                //renders latex math
                MathJax.Hub.Queue(["Typeset",MathJax.Hub]);
                resolve();
            },
            (err)=>
            {
                console.log(err);
                reject();
            });
        })
    }

    async function loadMore()
    {
        for(var i = 0; i < 3; i++)
        {
            if(postsToLoad.length == 0)
            {
                $('#morePostsBtn').html('');
                break;
            }
                
            await addPosts(postsToLoad.shift());
        }
        lazyLoad();
    }

    $(document).ready(function()
    {
        runAjax("/api/getPostsIds/{categoryID}",
            (idsList)=>
        {
            postsToLoad=idsList;
        },
        (err)=>
        {
            console.log(err);
            reject();
        });
    });


</script>

<br><br><br><br><br>
<div class="container">

    <div class="row">
        <div class="col-md-8 col-12">
            {for post in posts}
            <div class="blogPost">
                {if post.hasPicture}
                <img src="/content/headerImages/{post.picture_url}" style="width:100%;">
                {/if}

                <div class="p-4">
                    <h3><b>{post.name}</b></h3>
                    <h5>
                        <span class="w3-opacity">{post.published}</span>
                    </h5>

                    {post.blogBody}

                    {if preview}
                    <p class="text-center">
                        <a class="btn btn-secondary btn-lg text-white"
                            href="https://jrtechs.net/{post.categoryURL}/{post.url}"><b>Read More &raquo;</b></a>
                    </p>
                    {/if}

                </div>

            </div>
            <br>
            <br>
            {else}
            <div class="row p-lg-0">
                <h1 class="align-content-center">Page Not Found</h1>
                <div class="align-content-center">
                    <img src="/includes/img/404.jpg" alt="Page not found" width="70%" />
                </div>
            </div>
            <br><br>
            {/for}

            <div id="newPosts"></div>

            {if preview}
            <div class="justify-content-center w-100 blogPost" id="morePostsBtn">
                <a class="btn btn-secondary btn-lg btn-block text-white w-100 text-center" id="readMore"
                    onclick="loadMore()"><b>More Posts &raquo;</b></a>


            </div>
            {/if}
            <br>
        </div>
        <div class="col-md-4 col-12">
            {>sideBar}
        </div>
    </div>

</div>

{footer}