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# frozen_string_literal: true
module Gitlab
module Database
# PostgreSQL defines its own class with slightly different
# behaviour from the default Binary type.
BINARY_TYPE = ActiveRecord::ConnectionAdapters::PostgreSQL::OID::Bytea
# Class for casting binary data to hexadecimal SHA1 hashes (and vice-versa).
#
# Using ShaAttribute allows you to store SHA1 values as binary while still
# using them as if they were stored as string values. This gives you the
# ease of use of string values, but without the storage overhead.
class ShaAttribute < BINARY_TYPE
PACK_FORMAT = 'H*'
# Casts binary data to a SHA1 in hexadecimal.
def deserialize(value)
value = super(value)
value ? value.unpack1(PACK_FORMAT) : nil
end
# Casts a SHA1 in hexadecimal to the proper binary format.
def serialize(value)
arg = value ? [value].pack(PACK_FORMAT) : nil
BINARY_TYPE.new.serialize(arg)
end
# Casts a SHA1 in hexadecimal to the proper binary format.
def self.serialize(value)
arg = value ? [value].pack(PACK_FORMAT) : nil
BINARY_TYPE.new.serialize(arg)
end
end
end
end
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