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# Encapsulates a string representing a filename to provide convenience access to parts of it and a sanitized version.
# This is what's returned by `ActiveStorage::Blob#filename`. A Filename instance is comparable so it can be used for sorting.
class ActiveStorage::Filename
include Comparable
def initialize(filename)
@filename = filename
end
# Filename.new("racecar.jpg").extname # => ".jpg"
def extname
File.extname(@filename)
end
# Filename.new("racecar.jpg").extension # => "jpg"
def extension
extname.from(1)
end
# Filename.new("racecar.jpg").base # => "racecar"
def base
File.basename(@filename, extname)
end
# Filename.new("foo:bar.jpg").sanitized # => "foo-bar.jpg"
# Filename.new("foo/bar.jpg").sanitized # => "foo-bar.jpg"
#
# ...and any other character unsafe for URLs or storage is converted or stripped.
def sanitized
@filename.encode(Encoding::UTF_8, invalid: :replace, undef: :replace, replace: "�").strip.tr("\u{202E}%$|:;/\t\r\n\\", "-")
end
# Returns the sanitized version of the filename.
def to_s
sanitized.to_s
end
def as_json(*)
to_s
end
def to_json
to_s
end
def <=>(other)
to_s.downcase <=> other.to_s.downcase
end
end
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