Class: Patch

Inherits:
Object
  • Object
show all
Defined in:
app/models/patch.rb

Constant Summary collapse

RANGE_INFORMATION_LINE = 
/^@@ .+\+(?<line_number>\d+),/
MODIFIED_LINE = 
/^\+(?!\+|\+)/
NOT_REMOVED_LINE = 
/^[^-]/

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(body) ⇒ Patch

Returns a new instance of Patch.



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# File 'app/models/patch.rb', line 15

def initialize(body)
  @body = body || ''
end

Instance Attribute Details

#body ⇒ Object (readonly)

Returns the value of attribute body.



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# File 'app/models/patch.rb', line 6

def body
  @body
end

Class Method Details

.from_file_body(source) ⇒ Object 



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# File 'app/models/patch.rb', line 8

def self.from_file_body(source)
  lines = source.lines
  header = "@@ -0,0 +1,#{lines.count} @@\n"
  body = header + lines.map { |line| "+#{line}"}.join
  new(body)
end

Instance Method Details

#changed_lines ⇒ Object 



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# File 'app/models/patch.rb', line 19

def changed_lines
  line_number = 0

  lines.each_with_index.inject([]) do |lines, (content, patch_position)|
    case content
    when RANGE_INFORMATION_LINE
      line_number = Regexp.last_match[:line_number].to_i
    when MODIFIED_LINE
      line = Line.new(
        content: content,
        number: line_number,
        patch_position: patch_position
      )
      lines << line
      line_number += 1
    when NOT_REMOVED_LINE
      line_number += 1
    end

    lines
  end
end

#position_for_line_number(line) ⇒ Object 



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# File 'app/models/patch.rb', line 42

def position_for_line_number(line)
  changed_lines.find { |patch_line| patch_line.number == line }.patch_position
end