Moderate Feed Items with Triggers

Write an Apex before insert trigger to review the feed item body and change the status of the feed item if it contains a blocklisted phrase. To create a trigger for feed items from Setup, enter FeedItem Triggers in the Quick Find box, then select FeedItem Triggers. Alternatively, you can create a trigger from the Developer Console by clicking File | New | Apex Trigger and selecting FeedItem from the sObject drop-down list.

This example shows a before insert trigger on FeedItem that is used to review each new post. If the post contains the unwanted phrase, the trigger also sets the status of the post to PendingReview.

trigger ReviewFeedItem on FeedItem (before insert) {
    for (Integer i = 0; i<trigger.new.size(); i++) {

        // We don't want to leak "test phrase" information.

        if (trigger.new[i].body.containsIgnoreCase('test phrase')) {
            trigger.new[i].status = 'PendingReview'; 
            System.debug('caught one for pendingReview');
        }
    }
}