discourse/app/models/emoji.rb

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class Emoji
# update this to clear the cache
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EMOJI_VERSION = "5"
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FITZPATRICK_SCALE ||= [ "1f3fb", "1f3fc", "1f3fd", "1f3fe", "1f3ff" ]
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include ActiveModel::SerializerSupport
attr_reader :path
attr_accessor :name, :url
# whitelist emojis so that new user can post emojis
Post::white_listed_image_classes << "emoji"
def initialize(path = nil)
@path = path
end
def self.all
Discourse.cache.fetch(cache_key("all_emojis")) { standard | custom }
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end
def self.standard
Discourse.cache.fetch(cache_key("standard_emojis")) { load_standard }
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end
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def self.aliases
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Discourse.cache.fetch(cache_key("aliases_emojis")) { db['aliases'] }
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end
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def self.custom
Discourse.cache.fetch(cache_key("custom_emojis")) { load_custom }
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end
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def self.tonable_emojis
Discourse.cache.fetch(cache_key("tonable_emojis")) { db['tonableEmojis'] }
end
def self.exists?(name)
Emoji[name].present?
end
def self.[](name)
Emoji.custom.detect { |e| e.name == name }
end
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def self.create_from_db_item(emoji)
name = emoji["name"]
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filename = emoji['filename'] || name
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Emoji.new.tap do |e|
e.name = name
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e.url = Emoji.url_for(filename)
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end
end
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def self.url_for(name)
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"#{Discourse.base_uri}/images/emoji/#{SiteSetting.emoji_set}/#{name}.png?v=#{EMOJI_VERSION}"
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end
def self.cache_key(name)
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"#{name}:v#{EMOJI_VERSION}:#{Plugin::CustomEmoji.cache_key}"
end
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def self.clear_cache
Discourse.cache.delete(cache_key("custom_emojis"))
Discourse.cache.delete(cache_key("standard_emojis"))
Discourse.cache.delete(cache_key("aliases_emojis"))
Discourse.cache.delete(cache_key("all_emojis"))
Discourse.cache.delete(cache_key("tonable_emojis"))
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end
def self.db_file
"#{Rails.root}/lib/emoji/db.json"
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end
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def self.db
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@db ||= File.open(db_file, "r:UTF-8") { |f| JSON.parse(f.read) }
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end
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def self.load_standard
db['emojis'].map {|e| Emoji.create_from_db_item(e) }
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end
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def self.load_custom
result = []
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CustomEmoji.order(:name).all.each do |emoji|
result << Emoji.new.tap do |e|
e.name = emoji.name
e.url = emoji.upload&.url
end
end
Plugin::CustomEmoji.emojis.each do |name, url|
result << Emoji.new.tap do |e|
e.name = name
url = (Discourse.base_uri + url) if url[/^\/[^\/]/]
e.url = url
end
end
result
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end
def self.base_directory
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"public#{base_url}"
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end
def self.base_url
db = RailsMultisite::ConnectionManagement.current_db
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"#{Discourse.base_uri}/uploads/#{db}/_emoji"
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end
def self.replacement_code(code)
hexes = code.split('-'.freeze).map!(&:hex)
# Don't replace digits, letters and some symbols
hexes.pack("U*".freeze) if hexes[0] > 255
end
def self.unicode_replacements
return @unicode_replacements if @unicode_replacements
@unicode_replacements = {}
is_tonable_emojis = Emoji.tonable_emojis
fitzpatrick_scales = FITZPATRICK_SCALE.map { |scale| scale.to_i(16) }
db['emojis'].each do |e|
name = e['name']
next if name == 'tm'.freeze
code = replacement_code(e['code'])
next unless code
@unicode_replacements[code] = name
if is_tonable_emojis.include?(name)
fitzpatrick_scales.each_with_index do |scale, index|
toned_code = code.codepoints.insert(1, scale).pack("U*".freeze)
@unicode_replacements[toned_code] = "#{name}:t#{index+2}"
end
end
end
@unicode_replacements["\u{2639}"] = 'frowning'
@unicode_replacements["\u{263A}"] = 'slight_smile'
@unicode_replacements["\u{263B}"] = 'slight_smile'
@unicode_replacements["\u{2661}"] = 'heart'
@unicode_replacements["\u{2665}"] = 'heart'
@unicode_replacements
end
def self.unicode_unescape(string)
string.each_char.map do |c|
if str = unicode_replacements[c]
":#{str}:"
else
c
end
end.join
end
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def self.gsub_emoji_to_unicode(str)
if str
str.gsub(/:([\w\-+]*(?::t\d)?):/) { |name| Emoji.lookup_unicode($1) || name }
end
end
def self.lookup_unicode(name)
@reverse_map ||= begin
map = {}
is_tonable_emojis = Emoji.tonable_emojis
db['emojis'].each do |e|
next if e['name'] == 'tm'
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code = replacement_code(e['code'])
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next unless code
map[e['name']] = code
if is_tonable_emojis.include?(e['name'])
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FITZPATRICK_SCALE.each_with_index do |scale, index|
toned_code = (code.codepoints.insert(1, scale.to_i(16))).pack("U*")
map["#{e['name']}:t#{index+2}"] = toned_code
end
end
end
Emoji.aliases.each do |key, alias_names|
next unless alias_code = map[key]
alias_names.each do |alias_name|
map[alias_name] = alias_code
end
end
map
end
@reverse_map[name]
end
def self.unicode_replacements_json
@unicode_replacements_json ||= unicode_replacements.to_json
end
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end