R/related_artists.R

In akleefel/spotifyremoji:

#' Prints dataframe of artist's related artists.
#'
#' @param user_auth_token: String containing the users authentication tokent. See README for details
#' @param artistName: String specifyign an arists name
#' @return dataframe object
#'
#' @import httr
#' @import jsonlite
#' @import dplyr
#' @import glue
#'
#' @export
#'
#' @examples
#'
#' related_artists(auth, "Haftbefehl")
#'



library(httr)
library(jsonlite)
library(dplyr)
library(glue)



related_artists <- function(user_auth_token, artistName){

  #raise error if one of the arguments is missing

  if (user_auth_token == ""){
    stop("Argument `user_auth_token` is missing")
  }

  if (artistName == ""){
    stop("Argument `artistName` is missing")
  }


  #replace spaces in artist name with +
  artistName <- gsub(" ", "+", artistName)

  #get artist ID
  artistID <- get_artistID(user_auth_token,artistName)

  #get related artists
  string_related  = paste0("https://api.spotify.com/v1/artists/",artistID,"/related-artists")

  related_return <- GET(url = string_related, add_headers(Authorization = glue('Bearer {auth}')))
  text_content_rel <-  content(related_return, "text")
  json_content_rel <-  text_content_rel %>% fromJSON

  print(data.frame('Related Artists'=json_content_rel$artists$name))
}


#funciton that gets artist ID based on artist name

get_artistID <- function(user_auth_token, artistName){

  auth <- user_auth_token
  string_name <- paste0("https://api.spotify.com/v1/search?q=",artistName,"&type=artist")

  id_return <- GET(url = string_name, add_headers(Authorization = glue('Bearer {auth}')))

  text_content1 <-  content(id_return, "text")
  json_content1 <-  text_content1 %>% fromJSON

  return(json_content1$artists$items$id[1])
}