class ActionView::PathResolver

:nodoc:
An abstract class that implements a Resolver with path semantics.

def build_query(path, details)

Helper for building query glob string based on resolver's pattern. 
def build_query(path, details)
  query = @pattern.dup
  prefix = path.prefix.empty? ? "" : "#{escape_entry(path.prefix)}\\1"
  query.gsub!(/:prefix(\/)?/, prefix)
  partial = escape_entry(path.partial? ? "_#{path.name}" : path.name)
  query.gsub!(/:action/, partial)
  details.each do |ext, candidates|
    if ext == :variants && candidates == :any
      query.gsub!(/:#{ext}/, "*")
    else
      query.gsub!(/:#{ext}/, "{#{candidates.compact.uniq.join(',')}}")
    end
  end
  File.expand_path(query, @path)
end

def escape_entry(entry) 

def escape_entry(entry)
  entry.gsub(/[*?{}\[\]]/, '\\\\\\&'.freeze)
end

def extract_handler_and_format_and_variant(path)

to the resolver.
from the path, or the handler, we should return the array of formats given
Extract handler, formats and variant from path. If a format cannot be found neither 
def extract_handler_and_format_and_variant(path)
  pieces = File.basename(path).split(".".freeze)
  pieces.shift
  extension = pieces.pop
  handler = Template.handler_for_extension(extension)
  format, variant = pieces.last.split(EXTENSIONS[:variants], 2) if pieces.last
  format &&= Template::Types[format]
  [handler, format, variant]
end

def find_template_paths(query) 

def find_template_paths(query)
  Dir[query].uniq.reject do |filename|
    File.directory?(filename) ||
      # deals with case-insensitive file systems.
      !File.fnmatch(query, filename, File::FNM_EXTGLOB)
  end
end

def find_templates(name, prefix, partial, details, outside_app_allowed = false) 

def find_templates(name, prefix, partial, details, outside_app_allowed = false)
  path = Path.build(name, prefix, partial)
  query(path, details, details[:formats], outside_app_allowed)
end

def initialize(pattern = nil) 

def initialize(pattern = nil)
  @pattern = pattern || DEFAULT_PATTERN
  super()
end

def inside_path?(path, filename) 

def inside_path?(path, filename)
  filename = File.expand_path(filename)
  path = File.join(path, "")
  filename.start_with?(path)
end

def mtime(p)

Returns the file mtime from the filesystem. 
def mtime(p)
  File.mtime(p)
end

def query(path, details, formats, outside_app_allowed) 

def query(path, details, formats, outside_app_allowed)
  query = build_query(path, details)
  template_paths = find_template_paths(query)
  template_paths = reject_files_external_to_app(template_paths) unless outside_app_allowed
  template_paths.map do |template|
    handler, format, variant = extract_handler_and_format_and_variant(template)
    contents = File.binread(template)
    Template.new(contents, File.expand_path(template), handler,
      virtual_path: path.virtual,
      format: format,
      variant: variant,
      updated_at: mtime(template)
    )
  end
end

def reject_files_external_to_app(files) 

def reject_files_external_to_app(files)
  files.reject { |filename| !inside_path?(@path, filename) }
end