[SalesForce] How to use ConnectApi.ChatterFeeds class if Chatter is disabled

I have the following problem: my code uses ConnectApi.ChatterFeeds.postFeedElement and ConnectApi.ChatterFeeds.postFeedElementBatch methods to operate feed items. That works properly is Chatter is enabled for the org, but … if it's disabled I can't even install my package because of Invalid class ChatterFeeds exception coming from my unit tests. I realize that some Chatter object aren't accessible when Chatter is disabled (for example FeedItem), but you can always write

SObjectType token = Schema.getGlobalDescribe().get('FeedItem');
SObject objPost = token.newSObject();

instead of

FeedItem f = new FeedItem();

Does anyone know if there is a workaround like that for ChatterFeeds class methods? Or I have to get rid of ConnectApi and rewrite my Chatter logic somehow else?

UPDATE (Sep 29 2015)

Salesforce team just confirmed it is a known behavior: ConnectApi expects Chatter to be enabled and that's a runtime check which can't be avoided.

UPDATE (Nov 10 2015)

Fixed by Salesforce in Winter'16 Patch 11.0 (already deployed to the most org).
Details are here

Best Answer

You can use Connect API to detect the features your org is enabled

if(ConnectApi.Organization.getSettings().features.chatter) {
     //Logic here
 }

Reference links

https://developer.salesforce.com/docs/atlas.en-us.apexcode.meta/apexcode/apex_connectapi_output_features.htm

Related Solutions

[SalesForce] How to dynamically creating chatter groups in Apex

No need for connectapi to create a chatter group. You can created it directly e.g.:

CollaborationGroup myGroup = new CollaborationGroup();
myGroup.Name='My Group';
myGroup.CollaborationType='Public'; //can be 'Public' or 'Private'                   
insert myGroup;

Then to add a member:

CollaborationGroupMember groupMember = new CollaborationGroupMember();
groupMember.memberid = userId; //id of User you wish to add
groupMember.CollaborationGroupId = myGroup.Id; //Id of group created above
insert groupMember;

[SalesForce] How to get Chatter photo fileId

BritishBoy above is correct -- so the only way I could find to access the User Photos is through the URL:

Id fromUserId = '005o0000001drai';
Id toUserId = '005o0000000ygsZ';

for (ConnectApi.BatchResult eachResult :
     ConnectApi.ChatterUsers.getUserBatch(
         null, new List<Id> { fromUserId })) {
             ConnectApi.User eachUser = (ConnectApi.User)eachResult.getResult();
             ConnectApi.Photo p = ConnectApi.ChatterUsers.getPhoto(null, fromUserId);
             Http h = new Http();
             HttpRequest req = new HttpRequest();
             req.setEndPoint(p.fullEmailPhotoUrl);
             req.setMethod('GET');
             HttpResponse res = new Http().send(req);
             Blob b = res.getBodyAsBlob();
             ConnectApi.ChatterUsers.setPhoto(null, toUserId, 
                 new ConnectApi.BinaryInput(b, res.getHeader('Content-Type'),'user3.jpg'));
         }

Note that there's a couple caveats with the method above:

You need to authorize your Salesforce instance as a "Remote Site"
I was only able to get this to work with the fullEmailPhotoUrl property, as it doesn't need authentication

Related Topic

[SalesForce] ConnectApi.ChatterFeeds Limit handling in trigger