How to create Pinterest-like script – step 4

By | June 3, 2014
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Welcome our friends and sorry for the delay, I had to do a lot of things in real life. But in any case, I am glad to give you our fourth lesson where we create our own Pinterest like script. Today I added the ajaxy comment system and profile pages here. We can now write our own comments (this is available for logged users) directly on our pins, or on larger versions (popups)of images as well.
Today I will publish all updated files of our script, in case if you want to investigate it at your local computer – you always can download full package with sources.

Step 1. HTML

As I told, I added profile pages. As usual, I’m going to push whole html layout into single template file (so, you will be able to modify it easily):

templates/profile.html

<!DOCTYPE html>
<html lang="en" >
    <head>
        <meta charset="utf-8" />
        <meta name="author" content="Script Tutorials" />
        <title>How to create Pinterest-like script - step 4 | Script Tutorials</title>

        <!-- add styles -->
        <link href="css/main.css" rel="stylesheet" type="text/css" />
        <link href="css/colorbox.css" rel="stylesheet" type="text/css" />

        <!-- add scripts -->
        <script src="js/jquery.min.js"></script>
        <script src="js/jquery.colorbox-min.js"></script>
        <script src="js/jquery.masonry.min.js"></script>
        <script src="js/script.js"></script>
    </head>
    <body>

        <!-- header panel -->
        <div>

            <!-- logo -->
            <a href="index.php"></a>

            <!-- search form -->
            <form action="" method="get">
                <input autocomplete="off" name="q" size="27" placeholder="Search" type="text" />
                <input name="search" type="submit" />
            </form>

            <!-- navigation menu -->
            <ul>
                <li>
                    <a href="#">About<span></span></a>
                    <ul>
                        <li><a href="#">Help</a></li>
                        <li><a href="#">Pin It Button</a></li>
                        <li><a href="#" target="_blank">For Businesses</a></li>
                        <li><a href="#">Careers</a></li>
                        <li><a href="#">Team</a></li>
                        <li><a href="#">Blog</a></li>
                        <li><a href="#">Terms of Service</a></li>
                        <li><a href="#">Privacy Policy</a></li>
                        <li><a href="#">Copyright</a></li>
                        <li><a href="#">Trademark</a></li>
                    </ul>
                </li>
                {menu_elements}
                <li>
                    <a href="http://www.script-tutorials.com/pinterest-like-script-step-4/">Back to tutorial</a>
                </li>
            </ul>

        </div>

        {extra_data}

        <h2>Profile {profile_name}</h2>

        <!-- main container -->
        <div>
            {images_set}
        </div>
    </body>
</html>

Step 2. PHP

Now, please check PHP code of our profile page:

profile.php

// set warning level
if (version_compare(phpversion(), '5.3.0', '>=')  == 1)
  error_reporting(E_ALL & ~E_NOTICE & ~E_DEPRECATED);
else
  error_reporting(E_ALL & ~E_NOTICE); 

require_once('classes/CMySQL.php');
require_once('classes/CMembers.php');
require_once('classes/CPhotos.php');

// get login data
list ($sLoginMenu, $sExtra) = $GLOBALS['CMembers']->getLoginData();

// profile id
$i = (int)$_GET['id'];
if ($i) {
    $aMemberInfo = $GLOBALS['CMembers']->getProfileInfo($_SESSION['member_id']);
    if ($aMemberInfo) {

        // get all photos by profile
        $sPhotos = $GLOBALS['CPhotos']->getAllPhotos($i);

        // draw profile page
        $aKeys = array(
            '{menu_elements}' => $sLoginMenu,
            '{extra_data}' => $sExtra,
            '{images_set}' => $sPhotos,
            '{profile_name}' => $aMemberInfo['first_name'],
        );
        echo strtr(file_get_contents('templates/profile.html'), $aKeys);
        exit;
    }
}

header('Location: error.php');

This is very easy file as you see, it is similar as our index page, except for one – this page displays a profile name and his photos only. Now, in order to display his photos only, I had to modify CPhotos::getAllPhotos function. There is updated version:

    function getAllPhotos($iPid = 0) {
        $sFilter = ($iPid) ? "WHERE `owner` = '{$iPid}'" : '';
        $sSQL = "
            SELECT *
            FROM `pd_photos`
            {$sFilter}
            ORDER BY `when` DESC
        ";
        $aPhotos = $GLOBALS['MySQL']->getAll($sSQL);

        $sPhotos = '';
        $sFolder = 'photos/';
        foreach ($aPhotos as $i => $aPhoto) {

            $iPhotoId = (int)$aPhoto['id'];
            $sFile = $aPhoto['filename'];
            $sTitle = $aPhoto['title'];
            $iCmts = (int)$aPhoto['comments_count'];

            $aPathInfo = pathinfo($sFolder . $sFile);
            $sExt = strtolower($aPathInfo['extension']);

            $sImages .= <<<EOL
<!-- pin element {$iPhotoId} -->
<div pin_id="{$iPhotoId}">
    <div>
        <div>
            <a href="#">Repin</a>
            <a href="#">Like</a>
            <a href="#">Comment</a>
        </div>
        <a href="service.php?id={$iPhotoId}" title="{$sTitle}">
            <img alt="{$sTitle}" src="{$sFolder}{$sFile}">
        </a>
    </div>
    <p>{$sTitle}</p>
    <p>
        <span>XX likes</span>
        <span>XX repins</span>
        <span>{$iCmts} comments</span>
    </p>
    <form method="post" action="" style="display: none" onsubmit="return submitComment(this, {$iPhotoId})">
        <textarea placeholder="Add a comment..." maxlength="255" name="comment"></textarea>
        <input type="submit" value="Comment" />
    </form>
</div>
EOL;
        }
        return $sImages;
    }

Basically – I only added profile filter here, nothing more. Then, I prepared a new class for Comments:

classes/CComments.php

/*
* Comments class
*/
class CComments {

    // constructor
    function CComments() {
    }

    // return comments block
    function getComments($i) {
        // draw last 5 comments
        $sComments = '';
        $aComments = $GLOBALS['MySQL']->getAll("SELECT * FROM `pd_items_cmts` WHERE `c_item_id` = '{$i}' ORDER BY `c_when` DESC LIMIT 5");
        foreach ($aComments as $iCmtId => $aCmtsInfo) {
            $sWhen = date('F j, Y H:i', $aCmtsInfo['c_when']);
            $sComments .= <<<EOF
<div id="{$aCmtsInfo['c_id']}">
    <p>Comment from {$aCmtsInfo['c_name']} <span>({$sWhen})</span>:</p>
    <p>{$aCmtsInfo['c_text']}</p>
</div>
EOF;
        }
        return $sComments;
    }

    function acceptComment() {
        $iItemId = (int)$_POST['id']; // prepare necessary information
        $sIp = $this->getVisitorIP();

        $aMemberInfo = $GLOBALS['CMembers']->getProfileInfo($_SESSION['member_id']);
        $sName = $GLOBALS['MySQL']->escape(strip_tags($aMemberInfo['first_name']));
        $sText = $GLOBALS['MySQL']->escape(strip_tags($_POST['comment']));

        if ($iItemId && $sName && strlen($sText) > 2) {
            // check - if there is any recent comment from the same person (IP) or not (for last 5 mins)
            $iOldId = $GLOBALS['MySQL']->getOne("SELECT `c_item_id` FROM `pd_items_cmts` WHERE `c_item_id` = '{$iItemId}' AND `c_ip` = '{$sIp}' AND `c_when` >= UNIX_TIMESTAMP() - 300 LIMIT 1");
            if (! $iOldId) {
                // if everything is fine - allow to add comment
                $GLOBALS['MySQL']->res("INSERT INTO `pd_items_cmts` SET `c_item_id` = '{$iItemId}', `c_ip` = '{$sIp}', `c_when` = UNIX_TIMESTAMP(), `c_name` = '{$sName}', `c_text` = '{$sText}'");
                $GLOBALS['MySQL']->res("UPDATE `pd_photos` SET `comments_count` = `comments_count` + 1 WHERE `id` = '{$iItemId}'");

                // and print out last 5 comments
                $sOut = '';
                $aComments = $GLOBALS['MySQL']->getAll("SELECT * FROM `pd_items_cmts` WHERE `c_item_id` = '{$iItemId}' ORDER BY `c_when` DESC LIMIT 5");
                foreach ($aComments as $i => $aCmtsInfo) {
                    $sWhen = date('F j, Y H:i', $aCmtsInfo['c_when']);
                    $sOut .= <<<EOF
<div id="{$aCmtsInfo['c_id']}">
    <p>Comment from {$aCmtsInfo['c_name']} <span>({$sWhen})</span>:</p>
    <p>{$aCmtsInfo['c_text']}</p>
</div>
EOF;
                }
                return $sOut;
            }
        }
    }

    // get visitor IP
    function getVisitorIP() {
        $ip = "0.0.0.0";
        if( ( isset( $_SERVER['HTTP_X_FORWARDED_FOR'] ) ) && ( !empty( $_SERVER['HTTP_X_FORWARDED_FOR'] ) ) ) {
            $ip = $_SERVER['HTTP_X_FORWARDED_FOR'];
        } elseif( ( isset( $_SERVER['HTTP_CLIENT_IP'])) && (!empty($_SERVER['HTTP_CLIENT_IP'] ) ) ) {
            $ip = explode(".",$_SERVER['HTTP_CLIENT_IP']);
            $ip = $ip[3].".".$ip[2].".".$ip[1].".".$ip[0];
        } elseif((!isset( $_SERVER['HTTP_X_FORWARDED_FOR'])) || (empty($_SERVER['HTTP_X_FORWARDED_FOR']))) {
            if ((!isset( $_SERVER['HTTP_CLIENT_IP'])) && (empty($_SERVER['HTTP_CLIENT_IP']))) {
                $ip = $_SERVER['REMOTE_ADDR'];
            }
        }
        return $ip;
    }
}

$GLOBALS['Comments'] = new CComments();

There are only three functions now: getVisitorIP (to determinate IP of visitors), getComments (to return comments, by default – we display 5 last comments) and acceptComment (to accept comments and add them into database). Finally, I had to modify our service file:

service.php

// set warning level
if (version_compare(phpversion(), '5.3.0', '>=')  == 1)
  error_reporting(E_ALL & ~E_NOTICE & ~E_DEPRECATED);
else
  error_reporting(E_ALL & ~E_NOTICE); 

require_once('classes/CMySQL.php');
require_once('classes/CMembers.php');
require_once('classes/CPhotos.php');
require_once('classes/CComments.php');

if (! isset($_SESSION['member_id']) && $_POST['Join'] == 'Join') {
    $GLOBALS['CMembers']->registerProfile();
}

$i = (int)$_GET['id'];

if ($_GET && $_GET['get'] == 'comments') {
    header('Content-Type: text/html; charset=utf-8');
    echo $GLOBALS['Comments']->getComments($i);
    exit;
}
if ($_POST && $_POST['add'] == 'comment') {
    if ($_SESSION['member_id'] && $_SESSION['member_status'] == 'active' && $_SESSION['member_role']) {
        header('Content-Type: text/html; charset=utf-8');
        echo $GLOBALS['Comments']->acceptComment();
        exit;
    }
    header('Content-Type: text/html; charset=utf-8');
    echo '<h3>Please login first</h3>';
    exit;
}

if (! $i) { // if something is wrong - relocate to error page
    header('Location: error.php');
    exit;
}

$aPhotoInfo = $GLOBALS['CPhotos']->getPhotoInfo($i);
$aOwnerInfo = $GLOBALS['CMembers']->getProfileInfo($aPhotoInfo['owner']);

$sOwnerName = ($aOwnerInfo['first_name']) ? $aOwnerInfo['first_name'] : $aOwnerInfo['email'];
$sPhotoTitle = $aPhotoInfo['title'];
$sPhotoDate = $GLOBALS['CPhotos']->formatTime($aPhotoInfo['when']);

$sFolder = 'photos/';
$sFullImgPath = $sFolder . 'f_' . $aPhotoInfo['filename'];
$aSize = getimagesize($sFullImgPath); // get image info
$iWidth = $aSize[0];
$iHeight = $aSize[1];

?>
<div>
    <div>
        <a href="#">Follow</a>
        <a href="profile.php?id=<?= $aOwnerInfo['id'] ?>">
            <img alt="<?= $sOwnerName ?>" src="images/avatar.jpg" />
        </a>
        <p><a href="profile.php?id=<?= $aOwnerInfo['id'] ?>"><?= $sOwnerName ?></a></p>
        <p>Uploaded on <?= $sPhotoDate ?></p>
    </div>
    <div>
        <div>
            <a href="#">Repin</a>
            <a href="#">Like</a>
        </div>
        <a href="#" title="<?= $sPhotoTitle ?>">
            <img alt="<?= $sPhotoTitle ?>" src="<?= $sFullImgPath ?>" style="width:<?= $iWidth ?>px;height:<?= $iHeight ?>px;" />
        </a>
    </div>

    <p><?= $sPhotoTitle ?></p>

    <div></div>

    <script>
    function submitCommentAjx() {
        $.ajax({
          type: 'POST',
          url: 'service.php',
          data: 'add=comment&id=' + <?= $i ?> + '&comment=' + $('#pcomment').val(),
          cache: false,
          success: function(html){
            if (html) {
              $('.comments').html(html);
              $(this).colorbox.resize();
            }
          }
        });
    }
    </script>
    <form method="post" action="#">
        <textarea placeholder="Add a comment..." maxlength="255" id="pcomment"></textarea>
        <button type="button" onclick="return submitCommentAjx()">Comment</button>
    </form>
</div>

Now we can handle with comments! We use $.ajax function to POST comments to server. As soon as we post a new comment – server returns us (in response) 5 last comments, so we can update a list of last comments for an object (pin). Also, please pay attention, that our profiles have own links now (profile.php).

Step 3. CSS

I added only one little CSS property to our profile page (add this in the end of our styles file):

/* profile page */
.pname {
    font-size: 24px;
    margin-bottom: 10px;
    margin-top: 20px;
    text-align: center;
}

Step 4. Javascript

I updated our main script file. There are few changes: a new function to submit comments to the server, and, – to load comments (ajaxy) once we have opened a bigger photo using Colorbox.

js/script.js

function fileSelectHandler() {
    // get selected file
    var oFile = $('#image_file')[0].files[0];

    // html5 file upload
    var formData = new FormData($('#upload_form')[0]);
    $.ajax({
        url: 'upload.php', //server script to process data
        type: 'POST',
        // ajax events
        beforeSend: function() {
        },
        success: function(e) {
            $('#upload_result').html('Thank you for your photo').show();

            setTimeout(function() {
                $("#upload_result").hide().empty();
                location.reload();
            }, 4000);
        },
        error: function(e) {
            $('#upload_result').html('Error while processing uploaded image');
        },
        // form data
        data: formData,
        // options to tell JQuery not to process data or worry about content-type
        cache: false,
        contentType: false,
        processData: false
    });
}

function submitComment(form, id) {
    $.ajax({
      type: 'POST',
      url: 'service.php',
      data: 'add=comment&id=' + id + '&comment=' + $(form).find('textarea').val(),
      cache: false,
      success: function(html){
        if (html) {
          location.reload();
        }
      }
    });
    return false;
}

$(document).ready(function(){

    // file field change handler
    $('#image_file').change(function(){
        var file = this.files[0];
        name = file.name;
        size = file.size;
        type = file.type;

        // extra validation
        if (name && size)  {
            if (! file.type.match('image.*')) {
                alert("Select image please");
            } else {
                fileSelectHandler();
            }
        }
    });

    // masonry initialization
    $('.main_container').masonry({
        // options
        itemSelector : '.pin',
        isAnimated: true,
        isFitWidth: true
    });

    // onclick event handler (for comments)
    $('.comment_tr').click(function () {
        $(this).toggleClass('disabled');
        $(this).parent().parent().parent().find('form.comment').slideToggle(400, function () {
            $('.main_container').masonry();
        });
    }); 

    $('.ajax').colorbox({
        onOpen:function(){
        },
        onLoad:function(){
        },
        onComplete:function(){
            $(this).colorbox.resize();
            var iPinId = $(this).parent().parent().attr('pin_id');
            $.ajax({
              url: 'service.php',
              data: 'get=comments&id=' + iPinId,
              cache: false,
              success: function(html){
                $('.comments').append(html);

                $(this).colorbox.resize();
              }
            });

        },
        onCleanup:function(){
        },
        onClosed:function(){
        }
    });
});

Conclusion

We have just finished our fourth lesson where we writing our own Pinterest-like script. I hope you enjoy this series. It would be kind of you to share our materials with your friends. Good luck and welcome back!

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