Utilize Fb.api to automatically post on user's wall upon logging in

Question

Utilize Fb.api to automatically post on user's wall upon logging in

I want to utilize fb.api to make a single post on the logged-in user's wall. Here is the code snippet:

var params = {};
params['message'] = 'gegeegeggegall! Check out www.facebook.com/trashcandyrock for more info.';
params['name'] = 'gegeggeeg - gegegege';
params['description'] = 'Check out Tegegegeg! Win merch by playing and recommending to your friends.';
params['link'] = 'http://www.bblblba.com';
params['picture'] = 'http://summer-mourning.zoocha.com/uploads/thumb.png';
params['caption'] = 'Tgegegegeeg';

FB.api('/me/feed', 'post', params, function(response) {
  if (!response || response.error) {
    alert('Error occurred');
  } else {
    alert('Published to stream - you might want to delete it now!');
  }
});

Will this code post to the user's wall every time they refresh the site?

What should be done in this case?

javascript facebook

Answer 1

Answer №1

Who or what is initiating the FB.api request? If it's simply a piece of code enclosed in a script tag, it will execute once the browser reaches that point.

Alternatively, you could consider saving a cookie value or similar after the FB.api call and then verifying it during page load, but this may be unnecessary effort.

Answer 2

Who or what is initiating the FB.api request? If it's simply a piece of code enclosed in a script tag, it will execute once the browser reaches that point.

Alternatively, you could consider saving a cookie value or similar after the FB.api call and then verifying it during page load, but this may be unnecessary effort.

Answer 3

Answer №2

Are you looking to limit his post to just once?

If that's the case, you'll need to establish a "state". This can be done either client-side (using cookies) or server-side (with a database).

Start by creating a boolean variable called "posted", and store it in either a cookie or database (cookies might be easier since you're using javascript).

var posted=getCookie("posted");
if(!posted)
{
  //call the FB.api();
  setCookie("posted", true, duration);
}

To learn more about setCookie and getCookie functions, visit http://www.w3schools.com/JS/js_cookies.asp

Answer 4

Are you looking to limit his post to just once?

If that's the case, you'll need to establish a "state". This can be done either client-side (using cookies) or server-side (with a database).

Start by creating a boolean variable called "posted", and store it in either a cookie or database (cookies might be easier since you're using javascript).

var posted=getCookie("posted");
if(!posted)
{
  //call the FB.api();
  setCookie("posted", true, duration);
}

To learn more about setCookie and getCookie functions, visit http://www.w3schools.com/JS/js_cookies.asp

Answer 5

Answer №3

To determine if a message has already been posted, perform a FQL query on the stream table using your app id. Here is an example:

<!DOCTYPE html>
<html>
<body>
<div id="fb-root"></div>
<a href="#" onclick="postToWall();return false;">Post To Wall</a>
<script src="http://connect.facebook.net/en_US/all.js"></script>
<script>
  FB.init({ appId  : '**yourAppID**', status : true, cookie : true, xfbml  : true });

  function postToWall() {  
    FB.login(function(response) {
      if (response.session) {
        FB.api(
          {
            method: 'fql.query',
            query: 'SELECT post_id, message from stream where app_id = **yourAppID** and source_id = me()'
          },
          function(response) {
            if(response.length == 0){
              FB.ui(
              {
                 method: 'feed',
                 name: 'Facebook Dialogs',
                 link: 'https://developers.facebook.com/docs/reference/dialogs/',
                 picture: 'http://fbrell.com/f8.jpg',
                 caption: 'Reference Documentation',
                 description: 'Dialogs provide a simple, consistent interface for applications to interface with users.',
                 message: 'Facebook Dialogs are easy!'
              },
              function(response) {
                if (response && response.post_id) {
                   alert('Post was published.');
                } else {
                  alert('Post was not published.');
                }
              }
             );         
            }
            else { 
              alert('User already posted this message');
            }
          }
        );
      }
    } , {perms:''}); 
}
</script>
</body>
</html>

Answer 6

To determine if a message has already been posted, perform a FQL query on the stream table using your app id. Here is an example:

<!DOCTYPE html>
<html>
<body>
<div id="fb-root"></div>
<a href="#" onclick="postToWall();return false;">Post To Wall</a>
<script src="http://connect.facebook.net/en_US/all.js"></script>
<script>
  FB.init({ appId  : '**yourAppID**', status : true, cookie : true, xfbml  : true });

  function postToWall() {  
    FB.login(function(response) {
      if (response.session) {
        FB.api(
          {
            method: 'fql.query',
            query: 'SELECT post_id, message from stream where app_id = **yourAppID** and source_id = me()'
          },
          function(response) {
            if(response.length == 0){
              FB.ui(
              {
                 method: 'feed',
                 name: 'Facebook Dialogs',
                 link: 'https://developers.facebook.com/docs/reference/dialogs/',
                 picture: 'http://fbrell.com/f8.jpg',
                 caption: 'Reference Documentation',
                 description: 'Dialogs provide a simple, consistent interface for applications to interface with users.',
                 message: 'Facebook Dialogs are easy!'
              },
              function(response) {
                if (response && response.post_id) {
                   alert('Post was published.');
                } else {
                  alert('Post was not published.');
                }
              }
             );         
            }
            else { 
              alert('User already posted this message');
            }
          }
        );
      }
    } , {perms:''}); 
}
</script>
</body>
</html>

Utilize Fb.api to automatically post on user's wall upon logging in

Answer №1

Answer №2

Answer №3

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