GetReviewableHITs <-
reviewable <-
function (hit.type = NULL, status = NULL, response.group = "Minimal",
return.all = TRUE, pagenumber = "1", pagesize = "10", sortproperty = "Enumeration",
sortdirection = "Ascending", verbose = getOption('MTurkR.verbose', TRUE), ...) {
operation <- "GetReviewableHITs"
if (!sortproperty %in% c("Title", "Reward", "Expiration", "CreationTime", "Enumeration")) {
stop("'sortproperty' must be 'Title' | 'Reward' | 'Expiration' | 'CreationTime' | 'Enumeration'")
}
if (!sortdirection %in% c("Ascending", "Descending")) {
stop("'sortdirection' must be 'Ascending' | 'Descending'")
}
if (as.numeric(pagesize) < 1 || as.numeric(pagesize) > 100) {
stop("'pagesize' must be in range (1,100)")
}
if (as.numeric(pagenumber) < 1) {
stop("'pagenumber' must be > 1")
}
if (!is.null(response.group) && any(!response.group %in% "Minimal")) {
warning("ResponseGroup must be 'Minimal'; Minimal used as default")
}
if (!is.null(status) && !status %in% c("Reviewable", "Reviewing")) {
stop("Status must be 'Reviewable' or 'Reviewing' or NULL")
}
if (return.all == TRUE) {
sortproperty <- "Enumeration"
sortdirection <- "Ascending"
pagesize <- "100"
pagenumber <- "1"
}
if (is.factor(hit.type)) {
hit.type <- as.character(hit.type)
}
batch <- function(pagenumber, pagesize) {
GETparameters <- paste("&PageNumber=", pagenumber,
"&PageSize=", pagesize,
"&SortProperty=", sortproperty,
"&SortDirection=", sortdirection, sep = "")
if (!is.null(hit.type)) {
GETparameters <- paste(GETparameters, "&HITTypeId=", hit.type, sep = "")
}
if (!is.null(status) && (status %in% c("Reviewable", "Reviewing"))) {
GETparameters <- paste(GETparameters, "&Status=", status, sep = "")
}
batch <- request(operation, GETparameters = GETparameters, ...)
if (is.null(batch$valid)) {
return(batch)
}
batch$HITs <- NA
batch$total <- as.numeric(strsplit(strsplit(batch$xml,
"<TotalNumResults>")[[1]][2], "</TotalNumResults>")[[1]][1])
batch$batch.total <- length(xpathApply(xmlParse(batch$xml), "//HITId"))
if (batch$total > 0) {
for (i in 1:batch$batch.total) {
batch$HITs[i] <- strsplit(strsplit(batch$xml, "<HITId>")[[1]][i+1], "</HITId>")[[1]][1]
}
}
return(batch)
}
request <- batch(pagenumber, pagesize)
if (is.null(request$valid)) {
return(request)
}
runningtotal <- request$batch.total
pagenumber <- 2
while (request$total > runningtotal) {
nextbatch <- batch(pagenumber, pagesize)
if (is.null(nextbatch$valid)) {
return(nextbatch)
}
request$request.id <- c(request$request.id, nextbatch$request.id)
request$valid <- c(request$valid, nextbatch$valid)
request$xml.response <- c(request$xml, nextbatch$xml)
request$HITs <- c(request$HITs, nextbatch$HITs)
request$pages.returned <- pagenumber
runningtotal <- runningtotal + nextbatch$batch.total
pagenumber <- pagenumber + 1
}
request$batch.total <- NULL
if (verbose) {
message(request$total, " HITs Retrieved")
}
return(data.frame(HITId = request$HITs, stringsAsFactors = FALSE))
}
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