Module: ExTwitter::Utils

Included in:
Client
Defined in:
lib/ex_twitter/utils.rb

Constant Summary collapse

PROFILE_SAVE_KEYS = 
i(
  id
  name
  screen_name
  location
  description
  url
  protected
  followers_count
  friends_count
  listed_count
  favourites_count
  utc_offset
  time_zone
  geo_enabled
  verified
  statuses_count
  lang
  status
  profile_image_url_https
  profile_banner_url
  profile_link_color
  suspended
  verified
  entities
  created_at
)
STATUS_SAVE_KEYS = 
i(
  created_at
  id
  text
  source
  truncated
  coordinates
  place
  entities
  user
  contributors
  is_quote_status
  retweet_count
  favorite_count
  favorited
  retweeted
  possibly_sensitive
  lang
)

Instance Method Summary collapse

Instance Method Details

#__screen_name ⇒ Object 



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# File 'lib/ex_twitter/utils.rb', line 21

def __screen_name
  screen_name
end

#__uid ⇒ Object 



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# File 'lib/ex_twitter/utils.rb', line 8

def __uid
  uid
end

#__uid_i ⇒ Object 



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# File 'lib/ex_twitter/utils.rb', line 12

def __uid_i
  uid.to_i
end

#authenticating_user?(target) ⇒ Boolean 



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# File 'lib/ex_twitter/utils.rb', line 29

def authenticating_user?(target)
  user.id.to_i == user(target).id.to_i
end

#authorized_user?(target) ⇒ Boolean 



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# File 'lib/ex_twitter/utils.rb', line 33

def authorized_user?(target)
  target_user = user(target)
  !target_user.protected? || friendship?(user.id.to_i, target_user.id.to_i)
end

#call_old_method(method_name, *args) ⇒ Object 



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# File 'lib/ex_twitter/utils.rb', line 44

def call_old_method(method_name, *args)
  options = args.extract_options!
  begin
    self.call_count += 1
    _options = {method_name: method_name, call_count: self.call_count, args: args}.merge(options)
    instrument('api call', args[0], _options) { send(method_name, *args, options) }
  rescue Twitter::Error::TooManyRequests => e
    logger.warn "#{__method__}: call=#{method_name} #{args.inspect} #{e.class} Retry after #{e.rate_limit.reset_in} seconds."
    raise e
  rescue Twitter::Error::ServiceUnavailable => e
    logger.warn "#{__method__}: call=#{method_name} #{args.inspect} #{e.class} #{e.message}"
    raise e
  rescue Twitter::Error::InternalServerError => e
    logger.warn "#{__method__}: call=#{method_name} #{args.inspect} #{e.class} #{e.message}"
    raise e
  rescue Twitter::Error::Forbidden => e
    logger.warn "#{__method__}: call=#{method_name} #{args.inspect} #{e.class} #{e.message}"
    raise e
  rescue Twitter::Error::NotFound => e
    logger.warn "#{__method__}: call=#{method_name} #{args.inspect} #{e.class} #{e.message}"
    raise e
  rescue => e
    logger.warn "#{__method__}: call=#{method_name} #{args.inspect} #{e.class} #{e.message}"
    raise e
  end
end

#collect_with_cursor(method_name, *args) ⇒ Object

friends, followers



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# File 'lib/ex_twitter/utils.rb', line 92

def collect_with_cursor(method_name, *args)
  options = args.extract_options!
  last_response = call_old_method(method_name, *args, options).attrs
  return_data = (last_response[:users] || last_response[:ids])

  while (next_cursor = last_response[:next_cursor]) && next_cursor != 0
    options[:cursor] = next_cursor
    last_response = call_old_method(method_name, *args, options).attrs
    return_data += (last_response[:users] || last_response[:ids])
  end

  return_data
end

#collect_with_max_id(method_name, *args) ⇒ Object

user_timeline, search



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# File 'lib/ex_twitter/utils.rb', line 72

def collect_with_max_id(method_name, *args)
  options = args.extract_options!
  call_limit = options.delete(:call_limit) || 3
  last_response = call_old_method(method_name, *args, options)
  last_response = yield(last_response) if block_given?
  return_data = last_response
  call_count = 1

  while last_response.any? && call_count < call_limit
    options[:max_id] = last_response.last.kind_of?(Hash) ? last_response.last[:id] : last_response.last.id
    last_response = call_old_method(method_name, *args, options)
    last_response = yield(last_response) if block_given?
    return_data += last_response
    call_count += 1
  end

  return_data.flatten
end

#decode_json(json_str, caller_name, options = {}) ⇒ Object

decode



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# File 'lib/ex_twitter/utils.rb', line 248

def decode_json(json_str, caller_name, options = {})
  obj = json_str.kind_of?(String) ? JSON.parse(json_str) : json_str
  result =
    case
      when obj.nil?
        obj

      when obj.kind_of?(Array) && obj.first.kind_of?(Hash)
        obj.map { |o| Hashie::Mash.new(o) }

      when obj.kind_of?(Array) && obj.first.kind_of?(Integer)
        obj

      when obj.kind_of?(Hash)
        Hashie::Mash.new(obj)

      when obj === true || obj === false
        obj

      when obj.kind_of?(Array) && obj.empty?
        obj

      else
        raise "#{__method__}: caller=#{caller_name} key=#{options[:key]} obj=#{obj.inspect}"
    end
  result
end

#encode_json(obj, caller_name, options = {}) ⇒ Object

encode



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# File 'lib/ex_twitter/utils.rb', line 195

def encode_json(obj, caller_name, options = {})
  options[:reduce] = true unless options.has_key?(:reduce)
  result =
    case caller_name
      when :user_timeline, :home_timeline, :mentions_timeline, :favorites # Twitter::Tweet
        JSON.pretty_generate(obj.map { |o| o.attrs })

      when :search # Hash
        data =
          if options[:reduce]
            obj.map { |o| o.to_hash.slice(*STATUS_SAVE_KEYS) }
          else
            obj.map { |o| o.to_hash }
          end
        JSON.pretty_generate(data)

      when :friends, :followers # Hash
        data =
          if options[:reduce]
            obj.map { |o| o.to_hash.slice(*PROFILE_SAVE_KEYS) }
          else
            obj.map { |o| o.to_hash }
          end
        JSON.pretty_generate(data)

      when :friend_ids, :follower_ids # Integer
        JSON.pretty_generate(obj)

      when :user # Twitter::User
        JSON.pretty_generate(obj.to_hash.slice(*PROFILE_SAVE_KEYS))

      when :users, :friends_parallelly, :followers_parallelly # Twitter::User
        data =
          if options[:reduce]
            obj.map { |o| o.to_hash.slice(*PROFILE_SAVE_KEYS) }
          else
            obj.map { |o| o.to_hash }
          end
        JSON.pretty_generate(data)

      when :user? # true or false
        obj

      when :friendship? # true or false
        obj

      else
        raise "#{__method__}: caller=#{caller_name} key=#{options[:key]} obj=#{obj.inspect}"
    end
  result
end

#fetch_cache_or_call_api(method_name, user, options = {}) ⇒ Object 



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# File 'lib/ex_twitter/utils.rb', line 276

def fetch_cache_or_call_api(method_name, user, options = {})
  key = namespaced_key(method_name, user, options)
  options.update(key: key)

  data =
    if options[:cache] == :read
      instrument('Cache Read(Force)', key, caller: method_name) { cache.read(key) }
    else
      cache.fetch(key, expires_in: 1.hour, race_condition_ttl: 5.minutes) do
        _d = yield
        instrument('serialize', key, caller: method_name) { encode_json(_d, method_name, options) }
      end
    end

  instrument('deserialize', key, caller: method_name) { decode_json(data, method_name, options) }
end

#file_cache_key(method_name, user, options = {}) ⇒ Object 



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# File 'lib/ex_twitter/utils.rb', line 108

def file_cache_key(method_name, user, options = {})
  delim = ':'
  identifier =
    case
      when method_name == :search
        "str#{delim}#{user.to_s}"
      when method_name == :mentions_timeline
        "#{user.kind_of?(Integer) ? 'id' : 'sn'}#{delim}#{user.to_s}"
      when method_name == :home_timeline
        "#{user.kind_of?(Integer) ? 'id' : 'sn'}#{delim}#{user.to_s}"
      when method_name.in?([:users, :replying]) && options[:super_operation].present?
        case
          when user.kind_of?(Array) && user.first.kind_of?(Integer)
            "#{options[:super_operation]}-ids#{delim}#{Digest::MD5.hexdigest(user.join(','))}"
          when user.kind_of?(Array) && user.first.kind_of?(String)
            "#{options[:super_operation]}-sns#{delim}#{Digest::MD5.hexdigest(user.join(','))}"
          else raise "#{method_name.inspect} #{user.inspect}"
        end
      when user.kind_of?(Integer)
        "id#{delim}#{user.to_s}"
      when user.kind_of?(Array) && user.first.kind_of?(Integer)
        "ids#{delim}#{Digest::MD5.hexdigest(user.join(','))}"
      when user.kind_of?(Array) && user.first.kind_of?(String)
        "sns#{delim}#{Digest::MD5.hexdigest(user.join(','))}"
      when user.kind_of?(String)
        "sn#{delim}#{user}"
      when user.kind_of?(Twitter::User)
        "user#{delim}#{user.id.to_s}"
      else raise "#{method_name.inspect} #{user.inspect}"
    end

  "#{method_name}#{delim}#{identifier}"
end

#instrument(operation, key, options = nil) ⇒ Object 



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# File 'lib/ex_twitter/utils.rb', line 38

def instrument(operation, key, options = nil)
  payload = {operation: operation, key: key}
  payload.merge!(options) if options.is_a?(Hash)
  ActiveSupport::Notifications.instrument('call.ex_twitter', payload) { yield(payload) }
end

#namespaced_key(method_name, user, options = {}) ⇒ Object 



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# File 'lib/ex_twitter/utils.rb', line 142

def namespaced_key(method_name, user, options = {})
  file_cache_key(method_name, user, options)
end

#screen_name ⇒ Object

for backward compatibility



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# File 'lib/ex_twitter/utils.rb', line 17

def screen_name
  user.screen_name
end

#uid ⇒ Object

for backward compatibility



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# File 'lib/ex_twitter/utils.rb', line 4

def uid
  user.id
end

#uid_or_screen_name?(object) ⇒ Boolean 



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# File 'lib/ex_twitter/utils.rb', line 25

def uid_or_screen_name?(object)
  object.kind_of?(String) || object.kind_of?(Integer)
end