facebook.participants: Pull the list of participants from a set of inbox...
In facebook.S4: Access to Facebook API V2 via a Set of S4 Classes

Description Usage Arguments Details Value Author(s) See Also Examples

facebook.participants pulls information about the users and the pages who took part of a set of inbox conversations in a link{FacebookConversationsCollection-class} and push into a FacebookMixedCollection-class instance.

1 2	facebook.participants(id, token = NULL, parameters = list(), n = getOption("facebook.maxitems"), .progress = create_progress_bar())

`id`	An existing `FacebookConversationsCollection`.
`token`	Either a temporary access token created at https://developers.facebook.com/tools/explorer or the OAuth token created with `fbOAuth`. If it's `NULL`, the token from `id` is used. Otherwise, no query is performed to the Facebook Graph API and an empty Collection is returned.
`parameters`	A list of parameters to be added to the Facebook Graph API query. For more information on the accepted parameters, see: https://developers.facebook.com/docs/graph-api/using-graph-api.
`n`	An integer value with the maximum number of participants to be pulled for each conversation in `id`. It can be set to `Inf` to pull out any participant of a given conversation and assumes the default value to `facebook.maxitems` global option if missing.
`.progress`	progress_bar object as defined in the plyr package. By default the `none` progress bar is used, which prints nothing to the console. See create_progress_bar for details.

This function requires the use of a OAuth page access token with read_pages_mailboxes permission granted if id is a collection of pages conversations or a user access token with read_mailbox permission granted and when the users are developers for the application making the request if id is a collection of users' conversations.

Only the id and the type is returned in a mixed collection. Then, a proper collection for each type could be built accordingly.

Since this is a finder function, duplicated id won't be removed to the output collection if they have a different parent.

A collection of users and pages in a FacebookMixedCollection-class object with the id and the type for each element included.

Gabriele Baldassarre https://gabrielebaldassarre.com

FacebookConversationsCollection, facebook.search, facebook.senders

Other FacebookFinders: facebook.senders

## Not run: 
## See examples for fbOAuth to know how token was created.
 load("fb_oauth")
 
## Returns the conversations of the current user
 my.conversations <- FacebookUsersCollection(id="me", fb_oauth) %>%
    FacebookConversationsCollection()
 
## Who talks to the current users
 participants <- facebook.participants(my.conversations) %>% FacebookUsersCollection()

## End(Not run)