#' Creates a leaflet map of earthquakes
#'
#' This function creates a \code{leaflet} map of selected earthquakes based on
#' input NOAA earthquake cleaned data.
#'
#' @param data A data frame containing cleaned NOAA earthquake data
#' @param annot_col A character. The name of the column in the data that should
#' be used as descriptor.
#'
#' @return A leaflet map with earthquakes and annotations.
#' @export
#'
#' @import leaflet
#'
#' @examples
#' \dontrun{
#' eq_map(data, annot_col = "LOCATION_NAME")
#' }
eq_map <- function(data, annot_col) {
map <- leaflet::leaflet() %>%
leaflet::addTiles() %>%
leaflet::addCircleMarkers(lng = data$LONGITUDE, lat = data$LATITUDE,
radius = data$EQ_PRIMARY, weight = 1,
popup = data[[annot_col]])
return(map)
}
#' Creates a label for a leaflet map
#'
#' This function creates a label for the \code{leaflet} map based on location
#' name, magnitude and casualties from NOAA earthquake data
#'
#' @param data A data frame containing cleaned NOAA earthquake data
#'
#' @return A character vector with labels
#'
#' @details The input \code{data.frame} requires the following columns:
#' LOCATION_NAME, EQ_PRIMARY and TOTAL_DEATHS with the earthquake location, magintude and
#' total casualties respectively.
#'
#' @export
#'
#' @examples
#' \dontrun{
#' eq_create_label(data)
#' }
eq_create_label <- function(data) {
popup_text <- with(data, {
part1 <- ifelse(is.na(LOCATION_NAME), "",
paste("<strong>Location:</strong>",
LOCATION_NAME))
part2 <- ifelse(is.na(EQ_PRIMARY), "",
paste("<br><strong>Magnitude</strong>",
EQ_PRIMARY))
part3 <- ifelse(is.na(TOTAL_DEATHS), "",
paste("<br><strong>Total deaths:</strong>",
TOTAL_DEATHS))
paste0(part1, part2, part3)
})
}
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