#' Query Opencast for a specific events single publication
#'
#' Returns a single publication.
#'
#' This function expects the hostname, username and password to be set as environment variables.
#'
#' @return Returns a single publication.
#' @param eventId The event id
#' @param publicationId The publication id
#' @param sign Whether public distribution urls should be signed.
#' @importFrom httr modify_url
#' @export
#' @examples
#' Sys.setenv(OPENCAST_HOST = "https://legacy.opencast.org")
#' Sys.setenv(OPENCAST_USERNAME = "admin")
#' Sys.setenv(OPENCAST_PASSWORD = "opencast")
#'
#' events <- oc_list_events()
#' publications <- oc_event_list_publications(events$content$identifier[1])
#'
#' oc_event_publication(events$content$identifier[1],
#' publications$content$id[1])
oc_event_publication <- function(eventId = "",
publicationId = "",
sign = FALSE) {
# Check needed arguments
if (eventId == "") {
stop("No eventId specified.", call. = FALSE)
}
if (publicationId == "") {
stop("No publicationId specified.", call. = FALSE)
}
# Set the url path
path <- paste("/api/events/", eventId, "/publications/", publicationId, sep = "")
query <- list(sign = sign)
# Construct the url for the api call
url <- modify_url(oc_hostname(), path = path)
# Query the api and return the response
oc_package_query(url, query = query)
}
#' Print result of oc_event_publication()
#'
#' Print a structured return of the oc_event_publication() function.
#'
#' @param x The return of the function this print function relates to.
#' @param ... Possible further options to the print function.
#' @return A structured print of the return by the oc_event_publication() function.
#' @seealso \code{\link{oc_event_publication}}
#' @importFrom utils str
#' @export
#' @examples
#' Sys.setenv(OPENCAST_HOST = "https://legacy.opencast.org")
#' Sys.setenv(OPENCAST_USERNAME = "admin")
#' Sys.setenv(OPENCAST_PASSWORD = "opencast")
#'
#' events <- oc_list_events()
#' publications <- oc_event_list_publications(events$content$identifier[1])
#'
#' resp <- oc_event_publication(events$content$identifier[1],
#' publications$content$id[1])
#'
#' resp
print.oc_event_publication <- function(x, ...) {
cat("<Opencast ", x$path, ">\n", sep = "")
str(x$content)
invisible(x)
}
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