Module: Condenser::Resolve

Included in:
Condenser
Defined in:
lib/condenser/resolve.rb

Instance Method Summary collapse

Instance Method Details

#[](filename) ⇒ Object 



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# File 'lib/condenser/resolve.rb', line 122

def [](filename)
  build do
    find!(filename).export
  end
end

#build ⇒ Object 



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# File 'lib/condenser/resolve.rb', line 135

def build
  if build_cache.listening && !build_cache.semaphore.owned?
    build_cache.semaphore.lock 
    logger.debug { "build cache semaphore locked by #{Thread.current.object_id}" }
  end
  
  @build_cc += 1
  yield
ensure
  @build_cc -= 1
  if @build_cc == 0
    if build_cache.listening && build_cache.semaphore.owned?
      logger.debug { "build cache semaphore unlocked by #{Thread.current.object_id}" }
      build_cache.semaphore.unlock
    end
  end
end

#build_cache ⇒ Object 



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# File 'lib/condenser/resolve.rb', line 10

def build_cache
  return @build_cache if instance_variable_defined?(:@build_cache)
  @build_cache = BuildCache.new(path, logger: logger)
end

#decompose_path(path, base = nil) ⇒ Object 



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# File 'lib/condenser/resolve.rb', line 153

def decompose_path(path, base=nil)
  dirname = path.index('/') ? File.dirname(path) : nil
  if base && path&.start_with?('.')
    dirname = File.expand_path(dirname, base)
  end
  
  _, star, basename, extensions = path.match(/(([^\.\/]+)(\.[^\/]+)|\*|[^\/]+)$/).to_a
  if extensions == '.*'
    extensions = nil
  end
  if basename.nil? && extensions.nil?
    basename = star
  end
    
  if extensions.nil? && basename == '*'
    extensions = nil
    mime_types = []
  elsif extensions.nil?
    mime_types = []
  else
    exts = []
    while !extensions.empty?
      matching_extensions = @extensions.keys.select { |e| extensions.end_with?(e) }
      if matching_extensions.empty?
        basename << extensions
        break
        # raise 'unkown mime'
      else
        matching_extensions.sort_by! { |e| -e.length }
        exts.unshift(matching_extensions.first)
        extensions.delete_suffix!(matching_extensions.first)
      end
    end
    extensions = exts
    mime_types = extensions.map { |k| @extensions[k] }
  end
  
  
  [ dirname, basename, extensions, mime_types ]
end

#find(filename, base = nil, accept: nil) ⇒ Object 



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# File 'lib/condenser/resolve.rb', line 110

def find(filename, base=nil, accept: nil)
  build do
    resolve(filename, base, accept: accept).first
  end
end

#find!(filename, base = nil, **kargs) ⇒ Object 



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# File 'lib/condenser/resolve.rb', line 116

def find!(filename, base=nil, **kargs)
  build do
    resolve!(filename, base, **kargs).first
  end
end

#find_export(filename, base = nil, **kargs) ⇒ Object 



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# File 'lib/condenser/resolve.rb', line 128

def find_export(filename, base=nil, **kargs)
  build do
    asset = resolve(filename, base, **kargs).first
    asset&.export
  end
end

#initialize(*args, **kws, &block) ⇒ Object 



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# File 'lib/condenser/resolve.rb', line 4

def initialize(*args, **kws, &block)
  @reverse_mapping = nil
  @build_cache_options = kws[:listen]
  super
end

#match_mime_type?(value, matcher) ⇒ Boolean

Public: Test mime type against mime range.

match_mime_type?('text/html', 'text/*') => true
match_mime_type?('text/plain', '*') => true
match_mime_type?('text/html', 'application/json') => false

Returns true if the given value is a mime match for the given mime match specification, false otherwise.

Returns:

  • (Boolean) 


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# File 'lib/condenser/resolve.rb', line 246

def match_mime_type?(value, matcher)
  v1, v2 = value.split('/'.freeze, 2)
  m1, m2 = matcher.split('/'.freeze, 2)
  (m1 == '*'.freeze || v1 == m1) && (m2.nil? || m2 == '*'.freeze || m2 == v2)
end

#match_mime_types?(value, matcher) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/condenser/resolve.rb', line 221

def match_mime_types?(value, matcher)
  matcher = Array(matcher)
  value = Array(value)
  
  if matcher.length == 1 && matcher.last == '*/*'
    true
  else
    value.length == matcher.length && value.zip(matcher).all? { |v, m| match_mime_type?(v, m) }
  end
end

#mime_type_match_accept?(value, accept) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/condenser/resolve.rb', line 232

def mime_type_match_accept?(value, accept)
  accept.any? do |a|
    match_mime_types?(value, Array(a))
  end
end

#resolve(filename, base = nil, accept: nil) ⇒ Object 



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# File 'lib/condenser/resolve.rb', line 15

def resolve(filename, base=nil, accept: nil)
  filename = filename.delete_prefix("/") if path.none? { |p| filename.start_with?(p) }
  dirname, basename, extensions, mime_types = decompose_path(filename, base)
  accept ||= mime_types.empty? ? ['*/*'] : mime_types
  accept = Array(accept)
  
  cache_key = [dirname, basename].flatten.join('/')
  cache_key = "/#{cache_key}" if !cache_key.starts_with?('/')
  cache_key << "@#{accept.join(',')}" if accept
  build_cache.fetch(cache_key) do
    build do
      results = []

      paths = if dirname&.start_with?('/')
        if pat = path.find { |pa| dirname.start_with?(pa) }
          dirname.delete_prefix!(pat)
          dirname.delete_prefix!('/')
          [pat]
        else
          []
        end
      else
        path
      end
    
      paths.each do |path|
        glob = path
        glob = File.join(glob, dirname) if dirname
        glob = File.join(glob, basename)
        glob << '.*' unless glob.end_with?('*')
      
        Dir.glob(glob).sort.each do |f|
          next if !File.file?(f)
      
          f_dirname, f_basename, f_extensions, f_mime_types = decompose_path(f)
          if (basename == '*' || basename == f_basename)
            if accept == ['*/*'] || mime_type_match_accept?(f_mime_types, accept)
              asset_dir = f_dirname.delete_prefix(path).delete_prefix('/')
              asset_basename = f_basename + f_extensions.join('')
              asset_filename = asset_dir.empty? ? asset_basename : File.join(asset_dir, asset_basename)
              results << build_cache.map("#{asset_filename}@#{f_mime_types.join('')}") do
                Asset.new(self, {
                  filename: asset_filename,
                  content_types: f_mime_types,
                  source_file: f,
                  source_path: path
                })
              end
            else
              reverse_mapping[f_mime_types]&.each do |derivative_mime_types|
                if accept == ['*/*'] || mime_type_match_accept?(derivative_mime_types, accept)
                  asset_dir = f_dirname.delete_prefix(path).delete_prefix('/')
                  asset_basename = f_basename + derivative_mime_types.map { |t| @mime_types[t][:extensions].first }.join('')
                  asset_filename = asset_dir.empty? ? asset_basename : File.join(asset_dir, asset_basename)
                  results << build_cache.map("#{asset_filename}@#{derivative_mime_types.join('')}") do
                    Asset.new(self, {
                      filename: asset_filename,
                      content_types: derivative_mime_types,
                      source_file: f,
                      source_path: path
                    })
                  end
                end
              end
            end

          end
        end
      end
    
      results = results.group_by do |a|
        accept.find_index { |m| match_mime_types?(a.content_types, m) }
      end
    
      results = results.keys.sort.reduce([]) do |c, key|
        c += results[key].sort_by(&:filename).uniq { |f| f.filename }
      end

      results.sort_by!(&:filename)
      results
    end
  end
end

#resolve!(filename, base = nil, **kargs) ⇒ Object 



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# File 'lib/condenser/resolve.rb', line 99

def resolve!(filename, base=nil, **kargs)
  build do
    assets = resolve(filename, base, **kargs)
    if assets.empty?
      raise FileNotFound, "couldn't find file '#{filename}'"
    else
      assets
    end
  end
end

#reverse_mapping ⇒ Object 



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# File 'lib/condenser/resolve.rb', line 194

def reverse_mapping
  return @reverse_mapping if @reverse_mapping
  map = {}
  @mime_types.each_key do |source_mime_type|
    to_mime_type = source_mime_type

    ([nil] + (@transformers[source_mime_type]&.keys || [])).each do |transform_mime_type|
      to_mime_type = transform_mime_type if transform_mime_type
      
      ([nil] + @templates.keys).each do |template_mime_type|
        from_mimes = [source_mime_type, template_mime_type].compact
        to_mime_types = [to_mime_type].compact
        if from_mimes != to_mime_types
          map[from_mimes] ||= Set.new
          map[from_mimes] << to_mime_types
        end
      end

    end
  end
  $map = map
end

#writers_for_mime_type(mime_type) ⇒ Object 



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# File 'lib/condenser/resolve.rb', line 217

def writers_for_mime_type(mime_type)
  @writers.select { |m, e| match_mime_type?(mime_type, m) }.values.reduce(&:+)
end