Class: Beatport::Support::QueryBuilder

Inherits:
Object
  • Object
show all
Defined in:
lib/beatport/support/query_builder.rb

Overview

Converts a set of arguments into a format that beatport will understand

Constant Summary collapse

SPECIAL_OPTIONS = 
['sortBy', 'facets', 'returnFacets', 'subgenres']

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.process(*args) ⇒ Object 



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# File 'lib/beatport/support/query_builder.rb', line 11

def self.process(*args)
  new.process(*args)
end

Instance Method Details

#camelize_keys(options) ⇒ Object

Camelizes all the keys in the options hash



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# File 'lib/beatport/support/query_builder.rb', line 53

def camelize_keys(options)
  Inflector.process_keys(options) { |k| Inflector.camelize(k.to_s, false) }
end

#map_values(values) ⇒ Object

Map values delimited by ,



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# File 'lib/beatport/support/query_builder.rb', line 85

def map_values(values)
  values = values.split(/,\s*/) if values.is_a?(String)
  values.map do |value|
    yield value
  end.join(",") 
end

#process(*args) ⇒ Object 



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# File 'lib/beatport/support/query_builder.rb', line 19

def process(*args)
  @single_result = false
  
  options = args.last.is_a?(Hash) ? args.pop : {}      
  string_key_type = options.delete(:string_key_type) || :name
  collection = options.delete(:collection)
  key = options.delete(:key) || (args.length > 1 ? args.compact : args.first)
    
  case key
  when Integer
    options[:id] = key
    @single_result = true unless collection
  when String, Symbol
    options[string_key_type] = key.to_s
    @single_result = true unless collection
  when Array
    options[:ids] = key.flatten
  end

  options = camelize_keys(options)

  # Handle special options that need to be generated in a specific manner
  options.map do |key, value|
    if special_option?(key)
      options[key] = send(Inflector.underscore("process_#{key}"), value) 
    elsif value.is_a?(Array)
      options[key] = value.join(',')
    end
  end

  options
end

#process_facets(values) ⇒ Object

Special processing for facets



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# File 'lib/beatport/support/query_builder.rb', line 65

def process_facets(values)
  map_values(values) do |value|
    k, v = split_value(value, ':')
    Array(v).map {|v| "#{k}:#{v}"}.join(',')
  end       
end

#process_return_facets(values) ⇒ Object

Special processing for return_facets



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# File 'lib/beatport/support/query_builder.rb', line 73

def process_return_facets(values)
  map_values(values) do |value|
    Inflector.camelize(value, false)
  end
end

#process_sort_by(values) ⇒ Object

Special processing for sort_by keys



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# File 'lib/beatport/support/query_builder.rb', line 58

def process_sort_by(values)
  map_values(values) do |value|
    split_value(value, " ").join(" ")
  end       
end

#process_subgenres(value) ⇒ Object

Special processing for subgenres



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# File 'lib/beatport/support/query_builder.rb', line 80

def process_subgenres(value)
  value ? 'true' : 'false'
end

#single_result? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/beatport/support/query_builder.rb', line 7

def single_result?
  @single_result
end

#special_option?(key) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/beatport/support/query_builder.rb', line 15

def special_option?(key)
  SPECIAL_OPTIONS.include?(key)
end

#split_value(value, seperator) ⇒ Object 



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# File 'lib/beatport/support/query_builder.rb', line 92

def split_value(value, seperator)
  value = value.split(seperator) if value.is_a?(String)
  
  [Inflector.camelize(value.first, false), value.last]
end