Class: EivuFingerprinterAcoustid::Engine

Inherits:
Object
  • Object
show all
Defined in:
lib/eivu_fingerprinter_acoustid/engine.rb

Constant Summary collapse

SERVICE_LOOKUP_URL = 
"https://api.acoustid.org/v2/lookup"
SETTINGS = 
"recordings+releasegroups+compress"

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ Engine

Returns a new instance of Engine.



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# File 'lib/eivu_fingerprinter_acoustid/engine.rb', line 21

def initialize
  @client_id = ENV.fetch("ACOUSTID_CLIENT_ID", nil)
end

Instance Attribute Details

#calc_output ⇒ Object (readonly)

Returns the value of attribute calc_output.



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# File 'lib/eivu_fingerprinter_acoustid/engine.rb', line 13

def calc_output
  @calc_output
end

#duration ⇒ Object (readonly)

Returns the value of attribute duration.



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# File 'lib/eivu_fingerprinter_acoustid/engine.rb', line 13

def duration
  @duration
end

#fingerprint ⇒ Object (readonly)

Returns the value of attribute fingerprint.



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# File 'lib/eivu_fingerprinter_acoustid/engine.rb', line 13

def fingerprint
  @fingerprint
end

#raw_response ⇒ Object (readonly)

Returns the value of attribute raw_response.



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# File 'lib/eivu_fingerprinter_acoustid/engine.rb', line 13

def raw_response
  @raw_response
end

#response ⇒ Object (readonly)

Returns the value of attribute response.



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# File 'lib/eivu_fingerprinter_acoustid/engine.rb', line 13

def response
  @response
end

Class Method Details

.identify(path_to_file = nil) ⇒ Object 



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# File 'lib/eivu_fingerprinter_acoustid/engine.rb', line 15

def self.identify(path_to_file = nil)
  instance = new
  instance.generate(path_to_file)
  instance.submit
end

Instance Method Details

#cleansed_fingerprint_url ⇒ Object 



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# File 'lib/eivu_fingerprinter_acoustid/engine.rb', line 48

def cleansed_fingerprint_url
  fingerprint_url.gsub(@client_id, "<ACOUSTID_CLIENT_ID>")
end

#fingerprint_url ⇒ Object 



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# File 'lib/eivu_fingerprinter_acoustid/engine.rb', line 44

def fingerprint_url
  "#{SERVICE_LOOKUP_URL}?client=#{@client_id}&duration=#{@duration}&fingerprint=#{@fingerprint}&meta=#{SETTINGS}"
end

#generate(path_to_file) ⇒ Object 



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# File 'lib/eivu_fingerprinter_acoustid/engine.rb', line 25

def generate(path_to_file)
  # call fingerprint calculator
  @calc_output = execute_binary(path_to_file)
  # output is in the format of:
  # DURATION=267
  # FINGERPRINT=AQADtHKTZFJG7LSwHxeJuGmhj4i6Bj
  info = @calc_output.split("\n").each_with_object({}) do |line, hash|
    key, value = line.strip.split("=")
    hash[key.downcase.to_sym] = value
  end
  @fingerprint = info[:fingerprint]
  @duration    = info[:duration]&.to_i
end

#submit ⇒ Object 



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# File 'lib/eivu_fingerprinter_acoustid/engine.rb', line 39

def submit
  @raw_response = RestClient.get(fingerprint_url)
  @response     = Oj.load(@raw_response)&.deep_symbolize_keys
end