问我需要一个有效的方式在R转换彩色的utf-8表情字符到他们的默认皮肤

EN

library(rjson)
library(stringi)
library(stringr)

# this function gets name from emojis one at a time
emoji_json_file <- "https://raw.githubusercontent.com/ToadHanks/emojisLib_json/master/emojis.json"
json_data <- rjson::fromJSON(paste(readLines(emoji_json_file), collapse = "")) #read line by line make 

# gets the name i.e. get_name_from_emoji("?") output should be "yum"

get_name_from_emoji <- function(emoji_unicode, emoji_data = json_data) {

  emoji_evaluated <- stringi::stri_unescape_unicode(emoji_unicode) 

  vector_of_emoji_names_and_characters <- unlist(
    lapply(json_data, function(x){
      x$char
    })
  )

  name_of_emoji <- attr(
    which(vector_of_emoji_names_and_characters == emoji_evaluated)[1],
    "names"
  )

  return(name_of_emoji)
}

# Fill an empty vector with names
emoji_pouch_copy <- c("?","??","??","??","?","?") #we can't render U+1F3FB (light-skin graft), U+1F3FF (dark-skin graft) here that's why "?"
emoji_keywords_pouch <- c() 
for(i in 1: length(emoji_pouch_copy)){
  emoji_keywords_pouch <- c(emoji_keywords_pouch, get_name_from_emoji(emoji_pouch_copy[i]))
}

emoji_keywords_pouch #output: "shushing","point_down_fairly_dark","point_right_dark","fu_light","dark_skin_tone","light_skin_tone" 

#Function to remove the skin tones
remove_all_skins <- function(string, pattern) {
  str_replace_all(string, pattern, "000")
}

#remove these and their nativ renders at a positions
skin_tones <- c("medium_skin_tone", "fairly_dark_skin_tone", "dark_skin_tone", "fairly_light_skin_tone", "light_skin_tone", "_light","_dark","_medium","_fairly") 

emoji_keywords_pouch <- remove_all_skins(emoji_keywords_pouch, skin_tones[1])
emoji_keywords_pouch <- remove_all_skins(emoji_keywords_pouch, skin_tones[2])
emoji_keywords_pouch <- remove_all_skins(emoji_keywords_pouch, skin_tones[3])
emoji_keywords_pouch <- remove_all_skins(emoji_keywords_pouch, skin_tones[4])
emoji_keywords_pouch <- remove_all_skins(emoji_keywords_pouch, skin_tones[5])

emoji_keywords_pouch <- emoji_keywords_pouch[emoji_keywords_pouch != "000"] #free the memory

#It has to be this order, otherwise good strings will go bad in the variable containing keywords
emoji_keywords_pouch <- stringr::str_remove_all(emoji_keywords_pouch, skin_tones[6])
emoji_keywords_pouch <- stringr::str_remove_all(emoji_keywords_pouch, skin_tones[7])
emoji_keywords_pouch <- stringr::str_remove_all(emoji_keywords_pouch, skin_tones[8])
emoji_keywords_pouch <- stringr::str_remove_all(emoji_keywords_pouch, skin_tones[9])

#Reverse the function get_name... to get_emoji and rebuild the emoji_pouch
#i.e. get_emoji_from_name("yum") output should be "?"

get_emoji_from_name <- function(emoji_name, emoji_data = json_data) {

  vector_of_emoji_names_and_characters <- unlist(
    lapply(json_data, function(x){
      x$char
    })
  )

  emoji_character <- unname(
    vector_of_emoji_names_and_characters[
      names(vector_of_emoji_names_and_characters) == emoji_name
      ]
  )

  return(emoji_character)
}

#reset the original emoji_...copy to include standard tones
emoji_pouch_copy <- c()

for(i in 1: length(emoji_keywords_pouch)){
  # Sys.sleep(1)
  emoji_pouch_copy <- c(emoji_pouch_copy, get_emoji_from_name(emoji_keywords_pouch[i]))
}

#All of the skin tones are removed, because there are no standad skin tones
emoji_pouch_copy #output: "?""?" "?" "?"

#Finished