Can you make a Chatter FeedItem look like a standard Chatter Publisher Action post?

Question

I am creating a Publisher Action that uses a visualforce page and controller. All it essentially does is create an Attachment and insert it, but it works a little bit different from the default 'File' Publisher Action.

After it uploads the Attachment it is supposed to post back to Chatter. When using the default 'File' Publisher Action, you get a nice looking Chatter post with the title of the attachment hyper-linked to the attachment, a 'download file' link, an attachment icon, and a nice box around the whole thing.(See the following)

Is there anyway that I utilize this framework, or somehow use this Chatter post format in a FeedItem?

Answer 1

Edit - the ConnectAPI can do that - it's not the easiest thing to work with - but if have a regular attachment , this would post that attachment as a Chatter file on an Account's Feed:

Attachment attach = [Select Id, Body, Name, Description, ContentType FROM Attachment    WHERE Id = 'XXX']; //I am querying here - but so long as you have it in a controller, this should work as well.
Account a = new Account(Id = '001XXX'); 

ConnectApi.BinaryInput newChatterFile = new ConnectApi.BinaryInput(attach.Body, attach.ContentType, attach.Name);
ConnectApi.NewFileAttachmentInput cai = new ConnectApi.NewFileAttachmentInput ();
cai.description = attach.Description;
cai.title = attach.name;

    ConnectApi.FeedItemInput input = new ConnectApi.FeedItemInput();
    input.attachment = cai;
    input.visibility = ConnectApi.FeedItemVisibilityType.InternalUsers; 
        //TargetRecordId is the record id of the chatter feed you want to post on
    ConnectApi.ChatterFeeds.postFeedItem(null, 
                                        ConnectApi.FeedType.Record,
                                        a.Id, 
                                        input,
                                        newChatterFile);