Module: Tina4::Metrics

Defined in:
lib/tina4/metrics.rb

Constant Summary collapse

CACHE_TTL = 
60
OPERATOR_TYPES = 
%i[
  on_op
].freeze
OPERAND_TYPES = 
%i[
  on_ident on_int on_float on_tstring_content
  on_const on_symbeg on_rational on_imaginary
].freeze

Class Method Summary collapse

Class Method Details

._count_halstead(tokens) ⇒ Object 



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# File 'lib/tina4/metrics.rb', line 678

def self._count_halstead(tokens)
  stats = {
    operators: 0,
    operands: 0,
    unique_operators: Set.new,
    unique_operands: Set.new
  }

  # Need Set
  require 'set' unless defined?(Set)

  stats[:unique_operators] = Set.new
  stats[:unique_operands] = Set.new

  tokens.each do |(_pos, type, token)|
    case type
    when :on_op
      stats[:operators] += 1
      stats[:unique_operators].add(token)
    when :on_kw
      # Keywords that act as operators
      if %w[and or not defined? return yield raise].include?(token)
        stats[:operators] += 1
        stats[:unique_operators].add(token)
      end
    when :on_ident, :on_const
      stats[:operands] += 1
      stats[:unique_operands].add(token)
    when :on_int, :on_float, :on_rational, :on_imaginary
      stats[:operands] += 1
      stats[:unique_operands].add(token)
    when :on_tstring_content
      stats[:operands] += 1
      stats[:unique_operands].add(token[0, 50])
    end
  end

  stats
end

._cyclomatic_complexity_from_source(source) ⇒ Object 



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# File 'lib/tina4/metrics.rb', line 628

def self._cyclomatic_complexity_from_source(source)
  cc = 1

  # Use Ripper tokens for accurate counting
  tokens = begin
    Ripper.lex(source)
  rescue StandardError
    return cc
  end

  tokens.each do |(_pos, type, token)|
    case type
    when :on_kw
      case token
      when 'if', 'elsif', 'unless', 'when', 'while', 'until', 'for', 'rescue'
        # Skip modifier forms by checking if it's the first keyword on the line
        # For simplicity, count all — modifiers still add a decision path
        cc += 1
      end
    when :on_op
      case token
      when '&&', '||'
        cc += 1
      when '?'
        # Ternary operator
        cc += 1
      end
    when :on_ident
      # 'and' and 'or' are parsed as identifiers in some contexts
      # but usually as keywords
    end

    # Check for 'and'/'or' as keywords
    if type == :on_kw && (token == 'and' || token == 'or')
      cc += 1
    end
  end

  cc
end

._detect_violations(functions, file_metrics) ⇒ Object 



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# File 'lib/tina4/metrics.rb', line 726

def self._detect_violations(functions, file_metrics)
  violations = []

  functions.each do |f|
    if f["complexity"] > 20
      violations << {
        "type" => "error",
        "rule" => "high_complexity",
        "message" => "#{f['name']} has cyclomatic complexity #{f['complexity']} (max 20)",
        "file" => f["file"],
        "line" => f["line"]
      }
    elsif f["complexity"] > 10
      violations << {
        "type" => "warning",
        "rule" => "moderate_complexity",
        "message" => "#{f['name']} has cyclomatic complexity #{f['complexity']} (recommended max 10)",
        "file" => f["file"],
        "line" => f["line"]
      }
    end
  end

  file_metrics.each do |fm|
    if fm["loc"] > 500
      violations << {
        "type" => "warning",
        "rule" => "large_file",
        "message" => "#{fm['path']} has #{fm['loc']} LOC (recommended max 500)",
        "file" => fm["path"],
        "line" => 1
      }
    end

    if fm["functions"] > 20
      violations << {
        "type" => "warning",
        "rule" => "too_many_functions",
        "message" => "#{fm['path']} has #{fm['functions']} functions (recommended max 20)",
        "file" => fm["path"],
        "line" => 1
      }
    end

    if fm["maintainability"] < 20
      violations << {
        "type" => "error",
        "rule" => "low_maintainability",
        "message" => "#{fm['path']} has maintainability index #{fm['maintainability']} (min 20)",
        "file" => fm["path"],
        "line" => 1
      }
    elsif fm["maintainability"] < 40
      violations << {
        "type" => "warning",
        "rule" => "moderate_maintainability",
        "message" => "#{fm['path']} has maintainability index #{fm['maintainability']} (recommended min 40)",
        "file" => fm["path"],
        "line" => 1
      }
    end
  end

  violations.sort_by! { |v| [v["type"] == "error" ? 0 : 1, v["file"]] }
  violations
end

._extract_functions(source, tokens, lines) ⇒ Object 



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# File 'lib/tina4/metrics.rb', line 514

def self._extract_functions(source, tokens, lines)
  functions = []
  # Track class/module nesting for method names
  context_stack = []
  i = 0

  while i < lines.length
    stripped = lines[i].strip

    # Track class/module context
    if stripped.match?(/\A(class|module)\s+(\S+)/)
      m = stripped.match(/\A(class|module)\s+(\S+)/)
      class_name = m[2].to_s.split('<').first.to_s.strip
      context_stack.push(class_name) unless class_name.empty?
    end

    # Detect method definitions
    if stripped.match?(/\Adef\s+/)
      method_match = stripped.match(/\Adef\s+(self\.)?(\S+?)(\(.*\))?\s*$/)
      if method_match
        prefix = method_match[1] ? 'self.' : ''
        method_name = prefix + method_match[2]

        # Build full name with class context
        full_name = if context_stack.any?
                      "#{context_stack.last}.#{method_name}"
                    else
                      method_name
                    end

        # Extract arguments
        args = []
        if method_match[3]
          arg_str = method_match[3].gsub(/[()]/, '')
          arg_str.split(',').each do |arg|
            arg = arg.strip.split('=').first.strip.gsub(/^[*&]+/, '')
            args << arg unless arg == 'self' || arg.empty?
          end
        end

        # Find method end and calculate LOC
        method_start = i
        method_end = _find_method_end(lines, i)
        method_loc = method_end - method_start + 1

        # Calculate complexity for this method's body
        method_lines = lines[method_start..method_end]
        method_source = method_lines.join("\n")
        cc = _cyclomatic_complexity_from_source(method_source)

        functions << {
          "name" => full_name,
          "line" => i + 1,
          "complexity" => cc,
          "loc" => method_loc,
          "args" => args
        }
      end
    end

    # Track end keywords for context popping
    if stripped == 'end'
      # Check if this closes a class/module
      # Simple heuristic: count def/class/module opens vs end closes
      # We only pop context when we're back at the class/module level
      indent = lines[i].length - lines[i].lstrip.length
      if indent == 0 && context_stack.any?
        context_stack.pop
      end
    end

    i += 1
  end

  functions
end

._extract_imports(lines) ⇒ Object 



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# File 'lib/tina4/metrics.rb', line 499

def self._extract_imports(lines)
  imports = []
  lines.each do |line|
    stripped = line.strip
    if stripped.match?(/\Arequire\s+/)
      m = stripped.match(/\Arequire\s+['"]([^'"]+)['"]/)
      imports << m[1] if m
    elsif stripped.match?(/\Arequire_relative\s+/)
      m = stripped.match(/\Arequire_relative\s+['"]([^'"]+)['"]/)
      imports << m[1] if m
    end
  end
  imports
end

._files_hash(root) ⇒ Object 



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# File 'lib/tina4/metrics.rb', line 484

def self._files_hash(root)
  md5 = Digest::MD5.new
  root_path = Pathname.new(root)
  if root_path.directory?
    Dir.glob(root_path.join('**', '*.rb')).sort.each do |f|
      begin
        md5.update("#{f}:#{File.mtime(f).to_f}")
      rescue StandardError
        # ignore
      end
    end
  end
  md5.hexdigest
end

._find_method_end(lines, start_index) ⇒ Object 



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# File 'lib/tina4/metrics.rb', line 591

def self._find_method_end(lines, start_index)
  depth = 0
  i = start_index
  base_indent = lines[i].length - lines[i].lstrip.length

  while i < lines.length
    stripped = lines[i].strip

    unless stripped.empty? || stripped.start_with?('#')
      # Count block openers
      if stripped.match?(/\b(def|class|module|if|unless|case|while|until|for|begin|do)\b/) &&
         !stripped.match?(/\bend\b/) &&
         !stripped.end_with?(' if ', ' unless ', ' while ', ' until ') &&
         !(stripped.match?(/\bif\b|\bunless\b|\bwhile\b|\buntil\b/) && i != start_index && _is_modifier?(stripped))
        depth += 1
      end

      if stripped == 'end' || stripped.start_with?('end ') || stripped.start_with?('end;')
        depth -= 1
        return i if depth <= 0
      end
    end

    i += 1
  end

  # If we never found the end, return last line
  lines.length - 1
end

._has_matching_test(rel_path) ⇒ Object 



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# File 'lib/tina4/metrics.rb', line 426

def self._has_matching_test(rel_path)
  require 'set'

  name = File.basename(rel_path, '.rb')
  # Parent directory name (e.g. "database" from "database/sqlite3_adapter.rb")
  parent_dir = File.dirname(rel_path)
  parent_module = (parent_dir != '.' && !parent_dir.empty?) ? File.basename(parent_dir) : ''

  # Stage 1: Filename matching — name_spec, name_test, test_name patterns
  test_dirs = ['spec', 'spec/tina4', 'test', 'tests']
  test_dirs.each do |td|
    patterns = [
      "#{td}/#{name}_spec.rb",
      "#{td}/#{name}s_spec.rb",
      "#{td}/#{name}_test.rb",
      "#{td}/test_#{name}.rb",
    ]
    # Also check parent-named tests (spec/database_spec.rb covers database/sqlite3_adapter.rb)
    if parent_module && !parent_module.empty? && parent_module != name
      patterns << "#{td}/#{parent_module}_spec.rb"
      patterns << "#{td}/#{parent_module}s_spec.rb"
      patterns << "#{td}/#{parent_module}_test.rb"
      patterns << "#{td}/test_#{parent_module}.rb"
    end
    return true if patterns.any? { |p| File.exist?(p) }
  end

  # Build a dotted/slashed require path for import matching
  # e.g. "lib/tina4/database/sqlite3_adapter.rb" → "tina4/database/sqlite3_adapter"
  path_without_ext = rel_path.sub(/\.rb$/, '')
  # Strip leading lib/ prefix if present
  require_path = path_without_ext.sub(%r{^lib/}, '')

  # Build CamelCase class name from snake_case module name
  # e.g. "sqlite3_adapter" → "Sqlite3Adapter"
  class_name = name.split('_').map(&:capitalize).join

  # Stage 2+3: Content scan — check if any spec/test file references this module
  scan_dirs = ['spec', 'test', 'tests']
  scan_dirs.each do |td|
    next unless Dir.exist?(td)
    Dir.glob(File.join(td, '**', '*.rb')).each do |test_file|
      content = begin
        File.read(test_file, encoding: 'utf-8')
      rescue StandardError
        next
      end
      # Stage 2: require/require_relative path matching
      return true if !require_path.empty? && content.include?(require_path)
      # Stage 3: class name or module name mention
      return true if content.match?(/\b#{Regexp.escape(class_name)}\b/)
      return true if content.match?(/\b#{Regexp.escape(name)}\b/i)
    end
  end

  false
end

._is_modifier?(line) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/tina4/metrics.rb', line 621

def self._is_modifier?(line)
  # A rough check: if the keyword is not at the start of the meaningful content,
  # it's likely a modifier (e.g., "return x if condition")
  stripped = line.strip
  !stripped.match?(/\A(if|unless|while|until)\b/)
end

._maintainability_index(halstead_volume, avg_cc, loc) ⇒ Object 



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# File 'lib/tina4/metrics.rb', line 718

def self._maintainability_index(halstead_volume, avg_cc, loc)
  return 100.0 if loc <= 0

  v = [halstead_volume, 1].max
  mi = 171 - 5.2 * Math.log(v) - 0.23 * avg_cc - 16.2 * Math.log(loc)
  [[0.0, mi * 100.0 / 171].max, 100.0].min
end

._resolve_root(root = 'src') ⇒ Object

Pick the right directory to scan.

If the root dir has Ruby files, scan the user’s project code. Otherwise, scan the framework itself — so the bubble chart is never empty.



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# File 'lib/tina4/metrics.rb', line 33

def self._resolve_root(root = 'src')
  root_path = Pathname.new(root)
  if root_path.directory? && !Dir.glob(root_path.join('**', '*.rb')).empty?
    @last_scan_root = File.expand_path(root)
    return root
  end
  # Fallback: scan the framework package itself
  fw_dir = File.dirname(__FILE__)
  @last_scan_root = fw_dir
  fw_dir
end

.file_detail(file_path) ⇒ Object

── File Detail ─────────────────────────────────────────────



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# File 'lib/tina4/metrics.rb', line 358

def self.file_detail(file_path)
  unless File.exist?(file_path)
    # Try resolving relative to the last scan root (framework mode)
    if @last_scan_root && !@last_scan_root.empty?
      candidate = File.join(@last_scan_root, file_path)
      if File.exist?(candidate)
        file_path = candidate
      end
    end
  end
  unless File.exist?(file_path)
    return { "error" => "File not found: #{file_path}" }
  end

  source = begin
    File.read(file_path, encoding: 'utf-8')
  rescue StandardError => e
    return { "error" => "Read error: #{e.message}" }
  end

  tokens = begin
    Ripper.lex(source)
  rescue StandardError => e
    return { "error" => "Syntax error: #{e.message}" }
  end

  lines = source.lines.map(&:chomp)
  loc = lines.count { |l| !l.strip.empty? && !l.strip.start_with?('#') }

  functions = _extract_functions(source, tokens, lines)
  functions.sort_by! { |f| -f["complexity"] }

  classes = lines.count { |l| l.strip.match?(/\A(class|module)\s+/) }
  imports = _extract_imports(lines)

  warnings = []
  functions.each do |f|
    if f["loc"] <= 1
      warnings << { "type" => "empty_method", "message" => "Method '#{f["name"]}' appears to be empty", "line" => f["line"] }
    end
  end
  if classes > 0 && functions.empty? && loc <= 1
    warnings << { "type" => "empty_class", "message" => "Class/module appears to be empty", "line" => 1 }
  end

  {
    "path" => file_path,
    "loc" => loc,
    "total_lines" => lines.length,
    "classes" => classes,
    "functions" => functions.map { |f|
      {
        "name" => f["name"],
        "line" => f["line"],
        "complexity" => f["complexity"],
        "loc" => f["loc"],
        "args" => f["args"]
      }
    },
    "imports" => imports,
    "warnings" => warnings
  }
end

.full_analysis(root = 'src') ⇒ Object

── Full Analysis (Ripper-based) ────────────────────────────



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# File 'lib/tina4/metrics.rb', line 215

def self.full_analysis(root = 'src')
  # Check if the requested directory exists before falling back
  root_path = Pathname.new(root)
  return { "error" => "Directory not found: #{root}" } unless root_path.directory?

  root = _resolve_root(root)
  root_path = Pathname.new(root)

  current_hash = _files_hash(root)
  now = Time.now.to_f

  if @full_cache_hash == current_hash && !@full_cache_data.nil? && (now - @full_cache_time) < CACHE_TTL
    return @full_cache_data
  end

  rb_files = Dir.glob(root_path.join('**', '*.rb'))

  all_functions = []
  file_metrics = []
  import_graph = {}
  reverse_graph = {}

  rb_files.each do |f|
    source = begin
      File.read(f, encoding: 'utf-8')
    rescue StandardError
      next
    end

    tokens = begin
      Ripper.lex(source)
    rescue StandardError
      next
    end

    rel_path = begin
      Pathname.new(f).relative_path_from(root_path).to_s
    rescue ArgumentError
      f
    end

    lines = source.lines.map(&:chomp)
    loc = lines.count { |l| !l.strip.empty? && !l.strip.start_with?('#') }

    # Extract imports (require/require_relative)
    imports = _extract_imports(lines)
    import_graph[rel_path] = imports

    imports.each do |imp|
      reverse_graph[imp] ||= []
      reverse_graph[imp] << rel_path
    end

    # Parse functions/methods and their complexity
    file_functions = _extract_functions(source, tokens, lines)
    file_complexity = 0

    file_functions.each do |func_info|
      func_info["file"] = rel_path
      all_functions << func_info
      file_complexity += func_info["complexity"]
    end

    # Halstead metrics from tokens
    halstead = _count_halstead(tokens)
    n1 = halstead[:unique_operators].length
    n2 = halstead[:unique_operands].length
    n_total_1 = halstead[:operators]
    n_total_2 = halstead[:operands]
    vocabulary = n1 + n2
    length = n_total_1 + n_total_2
    volume = vocabulary > 0 ? length * Math.log2(vocabulary) : 0.0

    # Maintainability index
    avg_cc = file_functions.empty? ? 0 : file_complexity.to_f / file_functions.length
    mi = _maintainability_index(volume, avg_cc, loc)

    # Coupling
    ce = imports.length
    ca = (reverse_graph[rel_path] || []).length
    instability = (ca + ce) > 0 ? ce.to_f / (ca + ce) : 0.0

    file_metrics << {
      "path" => rel_path,
      "loc" => loc,
      "complexity" => file_complexity,
      "avg_complexity" => avg_cc.round(2),
      "functions" => file_functions.length,
      "maintainability" => mi.round(1),
      "halstead_volume" => volume.round(1),
      "coupling_afferent" => ca,
      "coupling_efferent" => ce,
      "instability" => instability.round(3),
      "has_tests" => _has_matching_test(rel_path),
      "dep_count" => imports.length
    }
  end

  # Update afferent coupling now that all files are processed
  file_metrics.each do |fm|
    fm["coupling_afferent"] = (reverse_graph[fm["path"]] || []).length
    ca = fm["coupling_afferent"]
    ce = fm["coupling_efferent"]
    fm["instability"] = (ca + ce) > 0 ? (ce.to_f / (ca + ce)).round(3) : 0.0
  end

  all_functions.sort_by! { |f| -f["complexity"] }
  file_metrics.sort_by! { |f| f["maintainability"] }

  violations = _detect_violations(all_functions, file_metrics)

  total_cc = all_functions.sum { |f| f["complexity"] }
  avg_cc = all_functions.empty? ? 0 : total_cc.to_f / all_functions.length
  total_mi = file_metrics.sum { |f| f["maintainability"] }
  avg_mi = file_metrics.empty? ? 0 : total_mi.to_f / file_metrics.length

  # Detect if we're scanning framework or project
  framework_dir = File.expand_path(File.dirname(__FILE__))
  resolved_root = File.expand_path(root_path.to_s)
  scanning_framework = resolved_root == framework_dir || resolved_root.start_with?(framework_dir + '/')

  result = {
    "files_analyzed" => file_metrics.length,
    "total_functions" => all_functions.length,
    "avg_complexity" => avg_cc.round(2),
    "avg_maintainability" => avg_mi.round(1),
    "most_complex_functions" => all_functions.first(15),
    "file_metrics" => file_metrics,
    "violations" => violations,
    "dependency_graph" => import_graph,
    "scan_mode" => scanning_framework ? "framework" : "project",
    "scan_root" => resolved_root
  }

  @full_cache_hash = current_hash
  @full_cache_data = result
  @full_cache_time = now

  result
end

.last_scan_root ⇒ Object 



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# File 'lib/tina4/metrics.rb', line 45

def self.last_scan_root
  @last_scan_root
end

.quick_metrics(root = 'src') ⇒ Object

── Quick Metrics ───────────────────────────────────────────



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# File 'lib/tina4/metrics.rb', line 51

def self.quick_metrics(root = 'src')
  # Check if the requested directory exists before falling back
  root_path = Pathname.new(root)
  return { "error" => "Directory not found: #{root}" } unless root_path.directory?

  root = _resolve_root(root)
  root_path = Pathname.new(root)

  rb_files = Dir.glob(root_path.join('**', '*.rb'))
  twig_files = Dir.glob(root_path.join('**', '*.twig')) + Dir.glob(root_path.join('**', '*.erb'))

  migrations_path = Pathname.new('migrations')
  sql_files = if migrations_path.directory?
                Dir.glob(migrations_path.join('**', '*.sql')) + Dir.glob(migrations_path.join('**', '*.rb'))
              else
                []
              end

  scss_files = Dir.glob(root_path.join('**', '*.scss')) + Dir.glob(root_path.join('**', '*.css'))

  total_loc = 0
  total_blank = 0
  total_comment = 0
  total_classes = 0
  total_functions = 0
  file_details = []

  rb_files.each do |f|
    source = begin
      File.read(f, encoding: 'utf-8')
    rescue StandardError
      next
    end

    lines = source.lines.map(&:chomp)
    loc = 0
    blank = 0
    comment = 0
    in_heredoc = false
    heredoc_id = nil
    in_block_comment = false

    lines.each do |line|
      stripped = line.strip

      if stripped.empty?
        blank += 1
        next
      end

      # =begin/=end block comments
      if in_block_comment
        comment += 1
        in_block_comment = false if stripped.start_with?('=end')
        next
      end

      if stripped.start_with?('=begin')
        comment += 1
        in_block_comment = true
        next
      end

      # Heredoc tracking (simplified)
      if in_heredoc
        if stripped == heredoc_id
          in_heredoc = false
        end
        loc += 1
        next
      end

      if stripped.match?(/<<[~-]?['"]?(\w+)['"]?/)
        m = stripped.match(/<<[~-]?['"]?(\w+)['"]?/)
        heredoc_id = m[1]
        in_heredoc = true unless stripped.include?(heredoc_id + stripped[-1].to_s)
        loc += 1
        next
      end

      if stripped.start_with?('#')
        comment += 1
        next
      end

      loc += 1
    end

    # Count classes and methods via simple pattern matching
    classes = lines.count { |l| l.strip.match?(/\A(class|module)\s+/) }
    functions = lines.count { |l| l.strip.match?(/\Adef\s+/) }

    total_loc += loc
    total_blank += blank
    total_comment += comment
    total_classes += classes
    total_functions += functions

    rel_path = begin
      Pathname.new(f).relative_path_from(root_path).to_s
    rescue ArgumentError
      f
    end

    file_details << {
      "path" => rel_path,
      "loc" => loc,
      "blank" => blank,
      "comment" => comment,
      "classes" => classes,
      "functions" => functions
    }
  end

  file_details.sort_by! { |d| -d["loc"] }

  # Route and ORM counts
  route_count = 0
  orm_count = 0
  begin
    if defined?(Tina4::Router) && Tina4::Router.respond_to?(:routes)
      route_count = Tina4::Router.routes.length
    elsif defined?(Tina4::Router) && Tina4::Router.instance_variable_defined?(:@routes)
      route_count = Tina4::Router.instance_variable_get(:@routes).length
    end
  rescue StandardError
    # ignore
  end

  begin
    if defined?(Tina4::ORM)
      orm_count = ObjectSpace.each_object(Class).count { |c| c < Tina4::ORM }
    end
  rescue StandardError
    # ignore
  end

  breakdown = {
    "ruby" => rb_files.length,
    "templates" => twig_files.length,
    "migrations" => sql_files.length,
    "stylesheets" => scss_files.length
  }

  {
    "file_count" => rb_files.length,
    "total_loc" => total_loc,
    "total_blank" => total_blank,
    "total_comment" => total_comment,
    "lloc" => total_loc,
    "classes" => total_classes,
    "functions" => total_functions,
    "route_count" => route_count,
    "orm_count" => orm_count,
    "template_count" => twig_files.length,
    "migration_count" => sql_files.length,
    "avg_file_size" => rb_files.empty? ? 0 : (total_loc.to_f / rb_files.length).round(1),
    "largest_files" => file_details.first(10),
    "breakdown" => breakdown
  }
end