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65 lines
2.2 KiB
R
65 lines
2.2 KiB
R
# ==============================================================================
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# getters for the opensensemap API.
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# the awesome httr library does all the curling, query and response parsing.
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# for CSV responses (get_measurements) the readr package is a hidden dependency
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# ==============================================================================
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get_boxes_ = function (..., endpoint) {
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response = osem_request_(endpoint, path = c('boxes'), ...)
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if (length(response) == 0) {
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warning('no boxes found for this query')
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return(response)
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}
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# parse each list element as sensebox & combine them to a single data.frame
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boxesList = lapply(response, parse_senseboxdata)
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df = dplyr::bind_rows(boxesList)
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df$exposure = df$exposure %>% as.factor()
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df$model = df$model %>% as.factor()
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df$grouptag = df$grouptag %>% as.factor()
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df
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}
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get_box_ = function (boxId, endpoint) {
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osem_request_(endpoint, path = c('boxes', boxId), progress = F) %>%
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parse_senseboxdata()
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}
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get_measurements_ = function (..., endpoint) {
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result = osem_request_(endpoint, c('boxes', 'data'), ..., type = 'text')
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# parse the CSV response manually & mute readr
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suppressWarnings({
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result = readr::read_csv(result, col_types = readr::cols(
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# factor as default would raise issues with concatenation of multiple requests
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.default = readr::col_character(),
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createdAt = readr::col_datetime(),
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value = readr::col_double(),
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lat = readr::col_double(),
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lon = readr::col_double(),
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height = readr::col_double()
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))
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})
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osem_as_measurements(result)
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}
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get_stats_ = function (endpoint) {
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result = osem_request_(endpoint, path = c('stats'), progress = F)
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names(result) = c('boxes', 'measurements', 'measurements_per_minute')
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result
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}
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osem_request_ = function (host, path, ..., type = 'parsed', progress) {
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progress = if (progress && !isNonInteractive()) httr::progress() else NULL
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res = httr::GET(host, progress, path = path, query = list(...))
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if (httr::http_error(res)) {
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content = httr::content(res, 'parsed', encoding = 'UTF-8')
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stop(if ('message' %in% names(content)) content$message else httr::status_code(res))
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}
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content = httr::content(res, type, encoding = 'UTF-8')
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}
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