Class: AnnotateRb::ModelAnnotator::FileParser::AnnotationFinder

Inherits:
Object
  • Object
show all
Defined in:
lib/annotate_rb/model_annotator/file_parser/annotation_finder.rb

Defined Under Namespace

Classes: MalformedAnnotation, NoAnnotationFound

Constant Summary collapse

COMPAT_PREFIX = 
"== Schema Info"
COMPAT_PREFIX_MD = 
"## Schema Info"
DEFAULT_ANNOTATION_ENDING = 
"#"
SCHEMA_HEADER_PREFIXES = 
[
  COMPAT_PREFIX,
  COMPAT_PREFIX_MD,
  "Table name:",
  "Database name:",
  "Schema version:"
].freeze
SCHEMA_HEADER_EXACT = 
[
  IndexAnnotation::Annotation::HEADER_TEXT,
  ForeignKeyAnnotation::Annotation::HEADER_TEXT,
  CheckConstraintAnnotation::Annotation::HEADER_TEXT
].freeze

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(content, wrapper_open, wrapper_close, parser) ⇒ AnnotationFinder

Returns a new instance of AnnotationFinder.



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# File 'lib/annotate_rb/model_annotator/file_parser/annotation_finder.rb', line 36

def initialize(content, wrapper_open, wrapper_close, parser)
  @content = content
  @wrapper_open = wrapper_open
  @wrapper_close = wrapper_close
  @annotation_start = nil
  @annotation_end = nil
  @parser = parser
end

Instance Attribute Details

#annotation_end ⇒ Object (readonly)

Returns the line index (not the line number) that the annotation ends, inclusive.



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# File 'lib/annotate_rb/model_annotator/file_parser/annotation_finder.rb', line 32

def annotation_end
  @annotation_end
end

#annotation_start ⇒ Object (readonly)

Returns the line index (not the line number) that the annotation starts.



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# File 'lib/annotate_rb/model_annotator/file_parser/annotation_finder.rb', line 30

def annotation_start
  @annotation_start
end

#parser ⇒ Object (readonly)

Returns the value of attribute parser.



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# File 'lib/annotate_rb/model_annotator/file_parser/annotation_finder.rb', line 34

def parser
  @parser
end

Instance Method Details

#annotated? ⇒ Boolean

Returns true if annotations are detected in the file content

Returns:

  • (Boolean) 


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# File 'lib/annotate_rb/model_annotator/file_parser/annotation_finder.rb', line 106

def annotated?
  @annotation_start && @annotation_end
end

#annotation ⇒ Object 



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# File 'lib/annotate_rb/model_annotator/file_parser/annotation_finder.rb', line 97

def annotation
  @annotation ||=
    begin
      lines = @content.lines
      lines[@annotation_start..@annotation_end].join
    end
end

#run ⇒ Object

Find the annotation’s line start and line end

Raises:



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# File 'lib/annotate_rb/model_annotator/file_parser/annotation_finder.rb', line 46

def run
  comments = @parser.comments

  start = comments.find_index { |comment, _| comment.include?(COMPAT_PREFIX) || comment.include?(COMPAT_PREFIX_MD) }
  raise NoAnnotationFound if start.nil? # Stop execution because we did not find

  if @wrapper_open
    prev_comment, _prev_line_number = comments[start - 1]

    # Change start to the line before if wrapper_open is defined and we find the wrapper open comment
    if prev_comment&.include?(@wrapper_open)
      start -= 1
    end
  end

  # Find a contiguous block of comments from the starting point
  ending = start
  while ending < comments.size - 1
    _comment, line_number = comments[ending]
    _next_comment, next_line_number = comments[ending + 1]

    if next_line_number - line_number == 1
      ending += 1
    else
      break
    end
  end

  raise MalformedAnnotation if start == ending

  if @wrapper_close
    if comments[ending].first.include?(@wrapper_close)
      # We can end here because it's the end of the annotation block
    else
      # Walk back until we find the end of the annotation comment block or the wrapper close to be flexible
      #  We check if @wrapper_close is a substring because `comments` contains strings with the comment character
      while ending > start && comments[ending].first != DEFAULT_ANNOTATION_ENDING && !comments[ending].first.include?(@wrapper_close)
        ending -= 1
      end
    end
  else
    ending = walk_forward_through_schema(comments, start, ending)
  end

  # We want .last because we want the line indexes
  @annotation_start = comments[start].last
  @annotation_end = comments[ending].last

  [@annotation_start, @annotation_end]
end