Module: Pray::StatementSurface

Defined in:
lib/pray/statement_surface.rb

Defined Under Namespace

Classes: Reader

Class Method Summary collapse

Class Method Details

.expand_brace_block(statement) ⇒ Object 



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# File 'lib/pray/statement_surface.rb', line 24

def expand_brace_block(statement)
  keyword = leading_identifier(statement)
  return nil unless keyword

  after_keyword = statement[keyword.length..].lstrip
  # Only keyword{…}, keyword(…){…}, or keyword "…"{…} — not spec.exports = {…}.
  header = split_brace_header(after_keyword)
  return nil unless header

  args, after_open = header
  close_offset = matching_close_brace(after_open)
  return nil unless close_offset
  return nil unless after_open[(close_offset + 1)..].to_s.strip.empty?

  body = after_open[0...close_offset].strip
  return nil unless Literal.is_balanced?(body)

  header_args = unwrap_outer_parens(args)
  open = header_args.empty? ? "#{keyword} do" : "#{keyword} #{header_args} do"
  output = [open]
  output.concat(expand_statement_surface(body)) unless body.empty?
  output << "end"
  output
end

.expand_one_surface(statement) ⇒ Object 



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# File 'lib/pray/statement_surface.rb', line 14

def expand_one_surface(statement)
  trimmed = statement.strip
  return [] if trimmed.empty?

  braced = expand_brace_block(trimmed)
  return braced if braced

  [normalize_keyword_call(trimmed)]
end

.expand_statement_surface(statement) ⇒ Object 



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# File 'lib/pray/statement_surface.rb', line 7

def expand_statement_surface(statement)
  trimmed = statement.strip
  return [] if trimmed.empty?

  Literal.split_top_level(trimmed, ";").flat_map { |segment| expand_one_surface(segment) }
end

.find_top_level_char(input, needle) ⇒ Object 



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# File 'lib/pray/statement_surface.rb', line 216

def find_top_level_char(input, needle)
  depth = 0
  quote = nil
  escaped = false
  input.each_char.with_index do |character, index|
    if quote
      if escaped
        escaped = false
      elsif character == "\\"
        escaped = true
      elsif character == quote
        quote = nil
      end
      next
    end

    case character
    when '"', "'"
      quote = character
    when "(", "[", "{"
      return index if depth.zero? && character == needle

      depth += 1
    when ")", "]", "}"
      depth -= 1
    else
      return index if depth.zero? && character == needle
    end
  end
  nil
end

.leading_identifier(input) ⇒ Object 



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# File 'lib/pray/statement_surface.rb', line 129

def leading_identifier(input)
  trimmed = input.lstrip
  end_index = 0
  while end_index < trimmed.length
    character = trimmed[end_index]
    break unless character.match?(/[A-Za-z0-9_]/)

    end_index += 1
  end
  return nil if end_index.zero?

  ident = trimmed[0...end_index]
  return nil unless ident[0].match?(/[A-Za-z]/)

  ident
end

.matching_close_brace(input) ⇒ Object 



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# File 'lib/pray/statement_surface.rb', line 159

def matching_close_brace(input)
  depth = 1
  quote = nil
  escaped = false
  input.each_char.with_index do |character, index|
    if quote
      if escaped
        escaped = false
      elsif character == "\\"
        escaped = true
      elsif character == quote
        quote = nil
      end
      next
    end

    case character
    when '"', "'"
      quote = character
    when "{"
      depth += 1
    when "}"
      depth -= 1
      return index if depth.zero?
    end
  end
  nil
end

.matching_close_delimited(input, open, close) ⇒ Object 



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# File 'lib/pray/statement_surface.rb', line 188

def matching_close_delimited(input, open, close)
  return nil unless input.start_with?(open)

  depth = 0
  quote = nil
  escaped = false
  input.each_char.with_index do |character, index|
    if quote
      if escaped
        escaped = false
      elsif character == "\\"
        escaped = true
      elsif character == quote
        quote = nil
      end
      next
    end

    if character == open
      depth += 1
    elsif character == close
      depth -= 1
      return index if depth.zero?
    end
  end
  nil
end

.matching_close_paren(input) ⇒ Object 



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# File 'lib/pray/statement_surface.rb', line 155

def matching_close_paren(input)
  matching_close_delimited(input, "(", ")")
end

.normalize_keyword_call(statement) ⇒ Object 



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# File 'lib/pray/statement_surface.rb', line 71

def normalize_keyword_call(statement)
  spaced = normalize_spaced_block_opener(statement)
  return spaced if spaced

  keyword = leading_identifier(statement)
  return statement unless keyword

  after_keyword = statement[keyword.length..].lstrip
  return statement unless after_keyword.start_with?("(")

  close = matching_close_paren(after_keyword)
  return statement unless close

  inner = after_keyword[1...close].strip
  trailing = after_keyword[(close + 1)..].to_s.strip
  trailing.empty? ? "#{keyword} #{inner}" : "#{keyword} #{inner} #{trailing}"
end

.normalize_spaced_block_opener(statement) ⇒ Object 



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# File 'lib/pray/statement_surface.rb', line 89

def normalize_spaced_block_opener(statement)
  trimmed = statement.strip
  %w[pray template].each do |keyword|
    next unless trimmed.start_with?(keyword)

    rest = trimmed[keyword.length..].lstrip
    return "#{keyword} do" if rest == "do"
  end
  nil
end

.split_brace_header(after_keyword) ⇒ Object 



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# File 'lib/pray/statement_surface.rb', line 49

def split_brace_header(after_keyword)
  if after_keyword.start_with?("{")
    return ["", after_keyword[1..]]
  end
  if after_keyword.start_with?("(")
    close = matching_close_paren(after_keyword)
    return nil unless close

    trailing = after_keyword[(close + 1)..].to_s.lstrip
    return nil unless trailing.start_with?("{")

    return [after_keyword[1...close].strip, trailing[1..]]
  end
  first = after_keyword[0]
  return nil unless ['"', "'", ":"].include?(first)

  brace_offset = find_top_level_char(after_keyword, "{")
  return nil unless brace_offset

  [after_keyword[0...brace_offset].strip, after_keyword[(brace_offset + 1)..]]
end

.split_symbol_assignment(statement) ⇒ Object 



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# File 'lib/pray/statement_surface.rb', line 100

def split_symbol_assignment(statement)
  trimmed = statement.strip
  call = split_symbol_call(trimmed)
  return call if call

  match = trimmed.match(/\A(\S+)\s+(.+)\z/)
  return nil unless match

  key = match[1].strip
  value = match[2].strip
  return nil if key.empty? || value.empty?

  [key, value]
end

.split_symbol_call(statement) ⇒ Object 



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# File 'lib/pray/statement_surface.rb', line 115

def split_symbol_call(statement)
  key = leading_identifier(statement)
  return nil unless key

  after_key = statement[key.length..].lstrip
  return nil unless after_key.start_with?("(") && after_key.end_with?(")")
  return nil unless matching_close_paren(after_key) == after_key.length - 1

  inner = after_key[1...-1].strip
  return nil if inner.empty?

  [key, inner]
end

.unwrap_outer_parens(input) ⇒ Object 



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# File 'lib/pray/statement_surface.rb', line 146

def unwrap_outer_parens(input)
  trimmed = input.strip
  if trimmed.start_with?("(") && matching_close_paren(trimmed) == trimmed.length - 1
    return trimmed[1...-1].strip
  end

  trimmed
end