Class: BabelDiff::YamlDiffer

Inherits:
Struct
  • Object
show all
Defined in:
lib/babel_diff/yaml_differ.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Instance Attribute Details

#current_version ⇒ Object

Returns the value of attribute current_version

Returns:

  • (Object) —

    the current value of current_version



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# File 'lib/babel_diff/yaml_differ.rb', line 5

def current_version
  @current_version
end

#previous_version ⇒ Object

Returns the value of attribute previous_version

Returns:

  • (Object) —

    the current value of previous_version



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# File 'lib/babel_diff/yaml_differ.rb', line 5

def previous_version
  @previous_version
end

Instance Method Details

#add_key_to_additions(keys, value) ⇒ Object 



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# File 'lib/babel_diff/yaml_differ.rb', line 61

def add_key_to_additions(keys, value)
  current_value = additions_hash
  keys[0...-1].each do |key|
    current_value = current_value[key] ||= {}
  end
  current_value[keys.last] = value
end

#add_key_to_updates(keys, value) ⇒ Object 



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# File 'lib/babel_diff/yaml_differ.rb', line 53

def add_key_to_updates(keys, value)
  current_value = updates_hash
  keys[0...-1].each do |key|
    current_value = current_value[key] ||= {}
  end
  current_value[keys.last] = value
end

#additions ⇒ Object 



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# File 'lib/babel_diff/yaml_differ.rb', line 12

def additions
  process_difference(current_version_hash) unless @processed
  @processed = true
  additions_hash.to_yaml
end

#previous_version_is_missing_key?(keys) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/babel_diff/yaml_differ.rb', line 34

def previous_version_is_missing_key?(keys)
  current_value = previous_version_hash
  keys.each do |key|
    current_value = current_value[key]
    return true if current_value.nil?
  end

  return false
end

#previous_version_value_is_different?(keys, value) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/babel_diff/yaml_differ.rb', line 44

def previous_version_value_is_different?(keys, value)
  current_value = previous_version_hash
  keys.each do |key|
    current_value = current_value[key]
  end

  return current_value != value
end

#process_difference(current_hash, keys = []) ⇒ Object 



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# File 'lib/babel_diff/yaml_differ.rb', line 18

def process_difference(current_hash, keys = [])
  current_hash.each do |key, value|
    keys << key
    if value.is_a? Hash
      process_difference(value, keys)
    else
      if previous_version_is_missing_key?(keys)
        add_key_to_additions(keys, value)
      elsif  previous_version_value_is_different?(keys, value)
        add_key_to_updates(keys, value)
      end
    end
    keys.pop
  end
end

#updates ⇒ Object 



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# File 'lib/babel_diff/yaml_differ.rb', line 6

def updates
  process_difference(current_version_hash) unless @processed
  @processed = true
  updates_hash.to_yaml
end