Class: RuboCop::Cop::Codemod::KeepUnique

Inherits:
Base
  • Object
show all
Extended by:
AutoCorrector
Includes:
IgnoredNode
Defined in:
lib/rubocop/oneoff_codemod/cops/keep_unique.rb

Overview

KeepUnique

Constant Summary collapse

MSG = 
"Keep array items unique, removing duplicates."
COMMAND = 
"keep-unique"

Instance Method Summary collapse

Constructor Details

#initialize(*args) ⇒ KeepUnique

Returns a new instance of KeepUnique.



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# File 'lib/rubocop/oneoff_codemod/cops/keep_unique.rb', line 14

def initialize(*args)
  super
  @commands = {}
end

Instance Method Details

#command_exists?(node) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/rubocop/oneoff_codemod/cops/keep_unique.rb', line 31

def command_exists?(node)
  @commands[node.location.line - 1] == COMMAND
end

#on_array(node) ⇒ Object 



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# File 'lib/rubocop/oneoff_codemod/cops/keep_unique.rb', line 35

def on_array(node)
  return unless command_exists? node
  return unless node.loc.begin.source == "[" || node.loc.begin.source.start_with?("%w")

  add_offense(node) do |corrector|
    next if part_of_ignored_node?(node)

    indent = " " * node.values.first.loc.column
    if node.loc.begin.source == "["
      separator = ", "
      line_separator = ",\n#{indent}"
    else
      separator = " "
      line_separator = "\n#{indent}"
    end

    content = []
    content << node.loc.begin.source
    content << processed_source.raw_source[node.loc.begin.end_pos..(node.values.first.loc.expression.begin_pos - 1)] # rubocop:disable Layout/LineLength

    acc = node.values.uniq(&:source).each_with_object([]) do |v_node, acc|
      acc << [] if acc.last&.last&.loc&.line != v_node.loc.line # rubocop:disable Style/SafeNavigationChainLength
      acc.last << v_node
    end
    content << acc.map { |a| a.map(&:source).join(separator) }.join(line_separator)

    content << processed_source.raw_source[node.values.last.loc.expression.end_pos..(node.loc.end.begin_pos - 1)] # rubocop:disable Layout/LineLength
    content << node.loc.end.source

    corrector.replace(node, content)
  end

  ignore_node(node)
end

#on_new_investigation ⇒ Object 



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# File 'lib/rubocop/oneoff_codemod/cops/keep_unique.rb', line 19

def on_new_investigation
  processed_source.comments.each do |comment|
    next unless comment.text == "# @#{COMMAND}"

    @commands[comment.location.line] = COMMAND

    add_offense(comment.location.expression) do |corrector|
      corrector.replace(comment.location.expression, "#")
    end
  end
end