class Fontist::Indexes::DirectoryChange

# File lib/fontist/indexes/directory_change.rb, line 17
def added(filename, new_info)
  new(ADDED, filename, nil, new_info)
end

# File lib/fontist/indexes/directory_change.rb, line 38
def diff(old_snapshot, new_snapshot)
  changes = []

  # Check for added and modified files
  new_snapshot.files.each do |new_file|
    filename = new_file[:filename]
    old_file = old_snapshot.file_info(filename)

    if old_file.nil?
      changes << added(filename, new_file)
    elsif file_modified?(old_file, new_file)
      changes << modified(filename, old_file, new_file)
    end
  end

  # Check for removed files
  old_snapshot.files.each do |old_file|
    filename = old_file[:filename]

    unless new_snapshot.has_file?(filename)
      changes << removed(filename, old_file)
    end
  end

  changes
end

# File lib/fontist/indexes/directory_change.rb, line 22
def modified(filename, old_info, new_info)
  new(MODIFIED, filename, old_info, new_info)
end

# File lib/fontist/indexes/directory_change.rb, line 76
def initialize(change_type, filename, old_info, new_info)
  @change_type = change_type
  @filename = filename
  @old_info = old_info
  @new_info = new_info
  freeze # Immutable
end

# File lib/fontist/indexes/directory_change.rb, line 27
def removed(filename, old_info)
  new(REMOVED, filename, old_info, nil)
end

# File lib/fontist/indexes/directory_change.rb, line 32
def unchanged(filename, info)
  new(UNCHANGED, filename, info, info)
end

# File lib/fontist/indexes/directory_change.rb, line 85
def added?
  @change_type == ADDED
end

# File lib/fontist/indexes/directory_change.rb, line 89
def modified?
  @change_type == MODIFIED
end

# File lib/fontist/indexes/directory_change.rb, line 93
def removed?
  @change_type == REMOVED
end

# File lib/fontist/indexes/directory_change.rb, line 102
def to_h
  {
    change_type: @change_type,
    filename: @filename,
    old_info: @old_info,
    new_info: @new_info,
  }
end

# File lib/fontist/indexes/directory_change.rb, line 97
def unchanged?
  @change_type == UNCHANGED
end