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Contents
module Decanter
module Parser
class ArrayParser < ValueParser
DUMMY_VALUE_KEY = '_'.freeze
parser do |val, options|
next if val.nil?
raise Decanter::ParseError.new 'Expects an array' unless val.is_a? Array
# Fetch parser classes for provided keys
parse_each = options.fetch(:parse_each, :pass)
item_parsers = Parser.parsers_for(Array.wrap(parse_each))
unless item_parsers.all? { |parser| parser <= ValueParser }
raise Decanter::ParseError.new 'parser(s) for array items must subclass ValueParser'
end
# Compose supplied parsers
item_parser = Parser.compose_parsers(item_parsers)
# Parse all values
val.map do |item|
# Value parsers will expect a "key" for the value they're parsing,
# so we provide a dummy one.
result = item_parser.parse(DUMMY_VALUE_KEY, item, options)
result[DUMMY_VALUE_KEY]
end.compact
end
end
end
end
Version data entries
17 entries across 17 versions & 1 rubygems