Nothing
# do we have a tree with root-node only?
is_empty_tree <- reactive({
if (json() == "[]") {
return(TRUE)
}
return(FALSE)
})
hierarchy <- reactive({
js <- json()
if (is.null(js)) {
return(NULL)
}
hier_import(inp = js, from = "json")
})
overall_level_name <- reactive({
attributes(json())$totlev
})
all_nodes <- reactive({
dd <- hierarchy()
if (is.null(dd)) {
return("")
}
hier_nodenames(dd)
})
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