Module: Tina4::Metrics

Defined in:
lib/tina4/metrics.rb

Constant Summary collapse

CACHE_TTL = 
60
SEVERITY_RANK =

Severity ranking for sorting (higher = more severe).

{ "error" => 2, "warn" => 1, "info" => 0 }.freeze
NOISE_TOKEN_TYPES =

Replace the CONTENT of Ruby string literals, regex literals, and comments with neutral spaces — keeping every line’s length and the line count identical to the original — so decision-point keywords and method-shaped text that live INSIDE strings/comments are never miscounted. Returns an array of cleaned lines (chomped) aligned 1:1 with the original lines.

Ruby’s own lexer (Ripper) does the hard parsing: it tags string/heredoc/ regex bodies as :on_tstring_content (and :on_comment, :on_embdoc — the

begin/=end block-comment body), which we blank out positionally. The

surrounding code structure (def/if/end keywords, operators) is left intact.

%i[
  on_tstring_content on_comment on_embdoc on_embdoc_beg on_embdoc_end
].freeze
BLOCK_OPENERS =

Keywords that ALWAYS open a block needing a matching ‘end`.

%w[def class module begin case].freeze
CONDITIONAL_OPENERS =

Keywords that open a block ONLY in statement-leading position; in trailing position they are modifiers (‘return x if y`) and need no `end`.

%w[if unless while until for].freeze
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

._clean_source(source) ⇒ Object 



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# File 'lib/tina4/metrics.rb', line 722

def self._clean_source(source)
  lines = source.lines.map(&:chomp)
  # Mutable per-line character buffers we can blank out by column range.
  buffers = lines.map(&:dup)

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

  tokens.each do |(pos, type, token)|
    next unless NOISE_TOKEN_TYPES.include?(type)

    row = pos[0] - 1
    col = pos[1]
    # A noise token may span multiple physical lines (heredocs, block
    # comments, multi-line strings). Blank each covered line segment.
    token.to_s.each_line.with_index do |seg, offset|
      line_idx = row + offset
      next if line_idx.negative? || line_idx >= buffers.length

      buf = buffers[line_idx]
      # On the token's first line the content starts at `col`; on
      # continuation lines it starts at column 0.
      start = offset.zero? ? col : 0
      seg_len = seg.chomp.length
      stop = [start + seg_len, buf.length].min
      (start...stop).each { |c| buf[c] = ' ' } if stop > start
    end
  end

  buffers
end

._count_halstead(tokens) ⇒ Object 



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# File 'lib/tina4/metrics.rb', line 956

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 906

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

._defined_constants(rel_path) ⇒ Object

Top-level class/module names defined in the file at rel_path (resolved against the last scan root when present). Distinctive names only: leading-uppercase, longer than 2 chars — so genuine 3-char constants like ORM (orm.rb) and API (api.rb), which specs reference as ‘Tina4::ORM` / `Tina4::API`, are detected as tested instead of being mislabelled untested. (Was > 3, which silently excluded every 3-char constant.)



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# File 'lib/tina4/metrics.rb', line 656

def self._defined_constants(rel_path)
  src_file = if @last_scan_root && !@last_scan_root.empty? && !File.exist?(rel_path)
               File.join(@last_scan_root, rel_path)
             else
               rel_path
             end
  symbols = Set.new
  content = begin
    File.read(src_file, encoding: 'utf-8')
  rescue StandardError
    return symbols
  end
  content.each_line do |line|
    stripped = line.strip
    m = stripped.match(/\A(?:class|module)\s+([A-Z][A-Za-z0-9_]*)/)
    next unless m
    const = m[1]
    symbols.add(const) if const.length > 2
  end
  symbols
end

._detect_violations(functions, file_metrics) ⇒ Object 



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# File 'lib/tina4/metrics.rb', line 1004

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 757

def self._extract_functions(source, _tokens, _lines)
  functions = []
  # Operate on a neutralised copy: string/regex/comment CONTENT is blanked
  # so keywords inside them are never read as real code (line numbers, line
  # count and column widths are preserved).
  lines = _clean_source(source)
  # 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 — require a real `def ` declaration so a
    # `def`-shaped substring inside a (now-blanked) string is never a method.
    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 693

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 678

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

Find the line index where the method that starts at ‘start_index` ends.

Token-driven (Ripper) so it is immune to the line-regex footguns that made this over-run to end-of-file (CC 496 on tiny methods):

* `self.class` — `class` after a `.` is an identifier, not a block opener
  (Ripper tags it :on_ident), so it no longer bumps depth.
* modifier `if/unless/while/until/for` (`return x if y`) — only counted
  as an opener in statement-LEADING position (first real token of a
  statement), never trailing.
* `lines` are already string/comment-cleaned, so keywords inside string
  bodies are gone too.

Falls back to the last line only if no matching ‘end` is found.



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# File 'lib/tina4/metrics.rb', line 857

def self._find_method_end(lines, start_index)
  source = lines[start_index..].join("\n")
  tokens = begin
    Ripper.lex(source)
  rescue StandardError
    return lines.length - 1
  end

  depth = 0
  # A keyword is a block opener only when it leads a statement. Track that:
  # we are at statement start initially and right after a newline / `;`.
  at_statement_start = true
  seen_opener = false

  tokens.each do |(pos, type, token)|
    case type
    when :on_kw
      if BLOCK_OPENERS.include?(token)
        depth += 1
        seen_opener = true
      elsif token == 'do'
        depth += 1
        seen_opener = true
      elsif CONDITIONAL_OPENERS.include?(token)
        # Leading => real block opener; trailing => modifier (no end).
        if at_statement_start
          depth += 1
          seen_opener = true
        end
      elsif token == 'end'
        depth -= 1
        if seen_opener && depth <= 0
          return start_index + (pos[0] - 1)
        end
      end
      at_statement_start = false
    when :on_nl, :on_ignored_nl, :on_semicolon
      at_statement_start = true
    when :on_sp, :on_comment, :on_embdoc, :on_embdoc_beg, :on_embdoc_end
      # whitespace/comments don't change statement-start state
    else
      at_statement_start = false
    end
  end

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

._has_matching_test(rel_path) ⇒ Object

Check whether a source file has a test that actually exercises it.

PRECISE detection (a bare word-mention is NOT enough — that over-reported badly: ‘sqlite3_adapter.rb` looked “tested” because some spec merely said “sqlite3_adapter”):

1. Filename — a dedicated `<module>_spec.rb` / `<module>_test.rb` /
   `test_<module>.rb` for THIS exact module (NOT the parent directory —
   one `database_spec.rb` must not mark every file under `database/`
   tested).
2. Require — a spec that actually requires this file: its require path
   (`require "tina4/database/sqlite"` / `require_relative ".../sqlite"`)
   matched by the basename of a require target. A constant/class that is
   genuinely DEFINED in this file (top-level class/module) referenced by
   a spec also counts.

Returns true only on a real, file-specific signal — so the “untested” offenders surfaced by ‘tina4 metrics` and the dashboard “T” badge are trustworthy. (If you wire real coverage data later, prefer it over this.)



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# File 'lib/tina4/metrics.rb', line 563

def self._has_matching_test(rel_path)
  require 'set'

  name = File.basename(rel_path, '.rb')

  # Require path WITHOUT extension, leading lib/ stripped:
  # "lib/tina4/database/sqlite.rb" -> "tina4/database/sqlite"
  require_path = rel_path.sub(/\.rb$/, '').sub(%r{^lib/}, '')

  # Constants (classes/modules) DEFINED at the top level of this file — a
  # spec referencing one of them genuinely exercises this file. Names only,
  # distinctive (>3 chars, leading uppercase); bare module-name words and
  # guessed CamelCase are too loose to trust.
  defined_symbols = _defined_constants(rel_path)

  # Search roots: CWD plus (in framework-fallback mode) the repo root that
  # owns spec/ — walk up from the scan root to find it.
  search_roots = ['.']
  if @last_scan_root && !@last_scan_root.empty?
    scan_root = @last_scan_root
    5.times do
      if %w[spec test tests].any? { |d| Dir.exist?(File.join(scan_root, d)) }
        search_roots << scan_root
        break
      end
      parent = File.dirname(scan_root)
      break if parent == scan_root
      scan_root = parent
    end
  end
  search_roots.uniq!

  test_dirs = %w[spec test tests]

  # Stage 1: a dedicated spec/test FILE named for THIS module (no parent-dir
  # blanket match).
  filename_patterns = [
    "#{name}_spec.rb",
    "#{name}s_spec.rb",
    "#{name}_test.rb",
    "test_#{name}.rb",
  ]
  search_roots.each do |root|
    test_dirs.each do |td|
      filename_patterns.each do |fn|
        return true if File.exist?(File.join(root, td, fn))
      end
    end
  end

  # Stage 2: a spec that actually REQUIRES this module (precise — matched by
  # the require target's basename / tail of the require path), or references
  # a constant defined in it. NO bare word-of-the-module-name match.
  require_regexps = []
  unless require_path.empty?
    # require "…/<module>" or require_relative "…/<module>" — match the
    # require string ending in this file's require path or basename.
    rp = Regexp.escape(require_path)
    nm = Regexp.escape(name)
    require_regexps << /(?:require|require_relative)\s+['"][^'"]*#{rp}['"]/
    require_regexps << %r{(?:require|require_relative)\s+['"][^'"]*/#{nm}['"]}
  end
  unless defined_symbols.empty?
    sym_alt = defined_symbols.map { |s| Regexp.escape(s) }.join('|')
    require_regexps << /\b(?:#{sym_alt})\b/
  end

  return false if require_regexps.empty?

  search_roots.each do |root|
    test_dirs.each do |td|
      dir = File.join(root, td)
      next unless Dir.exist?(dir)
      Dir.glob(File.join(dir, '**', '*.rb')).each do |test_file|
        content = begin
          File.read(test_file, encoding: 'utf-8')
        rescue StandardError
          next
        end
        return true if require_regexps.any? { |re| content.match?(re) }
      end
    end
  end

  false
end

._maintainability_index(halstead_volume, avg_cc, loc) ⇒ Object 



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# File 'lib/tina4/metrics.rb', line 996

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 476

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

.offenders(root = 'src', top = 20) ⇒ Object

Rank the worst code-quality issues into a single “top offenders” list.

Reuses full_analysis (does NOT re-analyze). Each offender is a hash:

{"file", "line", "kind", "severity", "score", "detail"}

Rules (one offender per matching condition):

- function complexity > 10  → kind "complexity"
      severity "error" if >20 else "warn"; score = complexity
- file loc > 500            → kind "large_file" (warn); score = loc/100
- file functions > 20       → kind "too_many_functions" (warn); score = functions/4
- file maintainability < 40 → kind "low_maintainability"
      severity "error" if <20 else "warn"; score = (50 - mi)
- file has_tests false      → kind "untested" (info); score = loc/100

Sorted by (severity rank, score) DESCENDING and truncated to ‘top`.

Returns => […], “summary” => {…} where summary carries the headline numbers the CLI prints (files_analyzed, total_functions, avg_complexity, avg_maintainability, scan_mode, scan_root, and the total offender count before truncation).



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# File 'lib/tina4/metrics.rb', line 381

def self.offenders(root = 'src', top = 20)
  analysis = full_analysis(root)
  if analysis.key?("error")
    return { "offenders" => [], "summary" => { "error" => analysis["error"] } }
  end

  items = []

  # Function-level: cyclomatic complexity.
  (analysis["most_complex_functions"] || []).each do |fn|
    cc = fn["complexity"]
    next unless cc > 10
    items << {
      "file" => fn["file"],
      "line" => fn["line"],
      "kind" => "complexity",
      "severity" => cc > 20 ? "error" : "warn",
      "score" => cc.to_f,
      "detail" => "#{fn['name']} — cyclomatic complexity #{cc}"
    }
  end

  # File-level rules.
  (analysis["file_metrics"] || []).each do |fm|
    path = fm["path"]
    loc = fm["loc"]
    funcs = fm["functions"]
    mi = fm["maintainability"]

    if loc > 500
      items << {
        "file" => path,
        "line" => 1,
        "kind" => "large_file",
        "severity" => "warn",
        "score" => loc / 100.0,
        "detail" => "#{loc} LOC (max 500)"
      }
    end

    if funcs > 20
      items << {
        "file" => path,
        "line" => 1,
        "kind" => "too_many_functions",
        "severity" => "warn",
        "score" => funcs / 4.0,
        "detail" => "#{funcs} functions (max 20)"
      }
    end

    if mi < 40
      items << {
        "file" => path,
        "line" => 1,
        "kind" => "low_maintainability",
        "severity" => mi < 20 ? "error" : "warn",
        "score" => 50 - mi,
        "detail" => "maintainability index #{mi} (min 40)"
      }
    end

    if fm["has_tests"] == false
      items << {
        "file" => path,
        "line" => 1,
        "kind" => "untested",
        "severity" => "info",
        "score" => loc / 100.0,
        "detail" => "no referencing test"
      }
    end
  end

  # Sort by (severity rank, score) DESCENDING — stable so insertion order
  # breaks ties deterministically.
  items = items.each_with_index.sort_by do |o, idx|
    [-SEVERITY_RANK[o["severity"]], -o["score"], idx]
  end.map(&:first)

  summary = {
    "files_analyzed" => analysis["files_analyzed"],
    "total_functions" => analysis["total_functions"],
    "avg_complexity" => analysis["avg_complexity"],
    "avg_maintainability" => analysis["avg_maintainability"],
    "scan_mode" => analysis["scan_mode"],
    "scan_root" => analysis["scan_root"],
    "total_offenders" => items.length
  }

  { "offenders" => items.first(top), "summary" => summary }
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