Class: OneApm::Support::RulesEngine::SegmentTermsRule

Inherits:
Object
  • Object
show all
Defined in:
lib/one_apm/support/rules_engine/segment_terms_rule.rb

Constant Summary collapse

OA_SEGMENT_PLACEHOLDER = 
'*'.freeze
OA_ADJACENT_PLACEHOLDERS_REGEX = 
%r{((?:^|/)\*)(?:/\*)*}.freeze
OA_ADJACENT_PLACEHOLDERS_REPLACEMENT = 
'\1'.freeze

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(options) ⇒ SegmentTermsRule

Returns a new instance of SegmentTermsRule.



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# File 'lib/one_apm/support/rules_engine/segment_terms_rule.rb', line 13

def initialize(options)
  @prefix          = options['prefix']
  @terms           = options['terms']
  @trim_range      = (@prefix.size..-1)
end

Instance Attribute Details

#prefix ⇒ Object (readonly)

Returns the value of attribute prefix.



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# File 'lib/one_apm/support/rules_engine/segment_terms_rule.rb', line 11

def prefix
  @prefix
end

#terms ⇒ Object (readonly)

Returns the value of attribute terms.



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# File 'lib/one_apm/support/rules_engine/segment_terms_rule.rb', line 11

def terms
  @terms
end

Instance Method Details

#apply(string) ⇒ Object 



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# File 'lib/one_apm/support/rules_engine/segment_terms_rule.rb', line 27

def apply(string)
  rest          = string[@trim_range]
  leading_slash = rest.slice!(OA_LEADING_SLASH_REGEX)

  segments = rest.split(OA_SEGMENT_SEPARATOR)
  segments.map! { |s| @terms.include?(s) ? s : OA_SEGMENT_PLACEHOLDER }
  transformed_suffix = collapse_adjacent_placeholder_segments(segments)

  "#{@prefix}#{leading_slash}#{transformed_suffix}"
end

#collapse_adjacent_placeholder_segments(segments) ⇒ Object 



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# File 'lib/one_apm/support/rules_engine/segment_terms_rule.rb', line 38

def collapse_adjacent_placeholder_segments(segments)
  joined = segments.join(OA_SEGMENT_SEPARATOR)
  joined.gsub!(OA_ADJACENT_PLACEHOLDERS_REGEX, OA_ADJACENT_PLACEHOLDERS_REPLACEMENT)
  joined
end

#matches?(string) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/one_apm/support/rules_engine/segment_terms_rule.rb', line 23

def matches?(string)
  string.start_with?(@prefix)
end

#terminal? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/one_apm/support/rules_engine/segment_terms_rule.rb', line 19

def terminal?
  true
end