Strange R package behaviour: "could not find function" - r

Question

I have some functionality which works fine outside of a package, but when I put it into a package, devtools::load_all, and try to run one of the functions (DTL_similarity_search_results_fast) , another function (DTL_similarity_search) which should be loaded by the package is not found when it gets run inside of DTL_similarity_search_results_fast.
The code is:
messagef <- function(...) message(sprintf(...))
printf <- function(...) print(sprintf(...))
pattern_to_vec <- function(pattern, as_int = F, keep_list = FALSE) {
ret <- strsplit(pattern, ",")
if(length(pattern) == 1 && !keep_list)
ret <- ret[[1]]
if(as_int){
ret <- lapply(ret, as.integer)
}
ret
}
DTL_similarity_search <- function(search_pattern = "1,2,1,2,1,2,1,2",
transformation = "interval",
database_names = "dtl,wjazzd,omnibook",
metadata_filters = '{"dtl": {}, "wjazzd": {}, "esac": {}, "omnibook": {}}',
filter_category = "0",
minimum_similarity = 1.0,
max_edit_distance = NA,
max_length_difference = 0) {
url <- suppressWarnings(httr::modify_url("https://staging-dtl-pattern-api.hfm-weimar.de/", path = "/patterns/similar"))
if(is.na(max_edit_distance)){
max_edit_distance <- purrr::map_int(pattern_to_vec(search_pattern, keep_list = T), length) %>% min()
}
messagef("[DTL API] Starting search for %s", search_pattern)
resp <- suppressWarnings(httr::POST(url, body = list( n_gram = search_pattern,
transformation = transformation,
database_names = database_names,
metadata_filters = metadata_filters,
filter_category = filter_category,
minimum_similarity = minimum_similarity,
max_edit_distance = max_edit_distance,
max_length_difference = max_length_difference, filter_category = 0),
encode = "form"))
#browser()
#print(httr::content(resp, "text"))
if (httr::http_error(resp)) {
messagef(
"[DTL API] Similarity Search request failed [%s]\n%s\n<%s>",
httr::status_code(resp),
"",#parsed$message,
""#parsed$documentation_url
)
return(NULL)
}
parsed <- jsonlite::fromJSON(httr::content(resp, "text"), simplifyVector = FALSE)
messagef("[DTL API] Retrieved search ID %s of for pattern %s", parsed$search_id, search_pattern)
parsed$search_id
}
DTL_get_results <- function(search_id) {
url <- suppressWarnings(httr::modify_url("http://staging-dtl-pattern-api.hfm-weimar.de/", path = "/patterns/get"))
#messagef("[DTL API] Retrieving results for search_id %s", search_id)
resp <- suppressWarnings(httr::GET(url, query = list(search_id = search_id)))
if (httr::http_error(resp)) {
messagef(
"[DTL API] Similarity Search request failed [%s]\n%s\n<%s>",
httr::status_code(resp),
"",#parsed$message,
""#parsed$documentation_url
)
return(NULL)
}
print(httr::content(resp, "text"))
#browser()
parsed <- jsonlite::fromJSON(httr::content(resp, "text"), simplifyVector = FALSE)
messagef("[DTL API] Retrieved %s lines for search_id %s", length(parsed), search_id)
purrr::map_dfr(parsed, function(x){
if(is.null(x$within_single_phrase)){
x$within_single_phrase <- FALSE
}
#browser()
tibble::as_tibble(x) %>% dplyr::mutate(melid = as.character(melid))
})
}
DTL_similarity_search_results <- function(search_patterns = "1,2,1,2,1,2,1,2",
transformation = "interval",
database_names = "dtl,wjazzd,omnibook",
metadata_filters = '{"dtl": {}, "wjazzd": {}, "esac": {}, "omnibook": {}}',
filter_category = "0",
minimum_similarity = 1.0,
max_edit_distance = NA,
max_length_difference = 0) {
results <- tibble::tibble()
if(is.na(max_edit_distance)){
max_edit_distance <- purrr:::map_int(pattern_to_vec(search_patterns, keep_list = T), length) %>% min()
}
for(pattern in search_patterns){
print('DTL_similarity_search')
print(DTL_similarity_search)
search_id <- DTL_similarity_search(pattern,
transformation,
database_names,
metadata_filters,
filter_category,
minimum_similarity,
max_edit_distance = max_edit_distance,
max_length_difference = max_length_difference)
if(is.null(search_id)){
next
}
ret <- DTL_get_results(search_id)
if(!is.null(ret) && nrow(ret) > 0){
ret$search_pattern <- pattern
}
results <- dplyr::bind_rows(results, ret)
}
#browser()
if(nrow(results))
results %>% dplyr::distinct(melid, start, length, .keep_all = T)
}
DTL_similarity_search_results_fast <- function(search_patterns = "1,2,1,2,1,2,1,2",
transformation = "interval",
database_names = "dtl,wjazzd,omnibook",
metadata_filters = '{"dtl": {}, "wjazzd": {}, "esac": {}, "omnibook": {}}',
filter_category = "0",
minimum_similarity = 1.0,
max_edit_distance = NA,
max_length_difference = 0){
if(is.na(max_edit_distance)){
max_edit_distance <- purrr::map_int(pattern_to_vec(search_patterns, keep_list = T), length) %>% min()
}
future::plan(future::multisession)
results <- furrr:::future_map_dfr(search_patterns, function(pattern){
print('DTL_similarity_search2')
search_id <- DTL_similarity_search(pattern,
transformation,
database_names,
metadata_filters,
filter_category,
minimum_similarity,
max_edit_distance = max_edit_distance,
max_length_difference = max_length_difference)
if(is.null(search_id)){
return(tibble::tibble())
}
ret <- DTL_get_results(search_id)
if(!is.null(ret) && nrow(ret) > 0 )ret$search_pattern <- pattern
ret
})
#browser()
results %>% dplyr::distinct(melid, start, length, .keep_all = TRUE)
}
Then after load_all() when I try to run:
res <- DTL_similarity_search_results_fast()
I get:
Error in DTL_similarity_search(pattern, transformation,
database_names, : could not find function "DTL_similarity_search
but running a similar, different function works using the same procedure:
res <- DTL_similarity_search_results()