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Versions: 36
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Stored size: 1.41 KB
Contents
# frozen_string_literal: true
# Argument validation.
class Args
def self.fetch_non_empty_string(hash, key)
value = fetch_non_nil(hash, key, String)
raise ArgumentError, "parameter #{key} empty" if value.strip.empty?
value
end
def self.fetch_non_empty_int(hash, key)
fetch_non_nil(hash, key, Integer)
end
def self.fetch_non_empty_hash(hash, key)
value = fetch_non_nil(hash, key, Hash)
raise ArgumentError, "parameter #{key} empty" if value.empty?
value
end
def self.fetch_optional_hash(hash, key)
fetch_optional(hash, key, Hash)
end
def self.fetch_optional_array(hash, key)
fetch_optional(hash, key, Array)
end
def self.fetch_non_nil(hash, key, *classes)
raise ArgumentError, "parameter #{key} missing" unless hash.key?(key)
raise ArgumentError, "parameter #{key} null" if hash[key].nil?
fetch_optional(hash, key, *classes)
end
def self.fetch_optional(hash, key, *classes)
value = hash[key]
if value && classes.size.positive? && !classes.find { |clazz| value.is_a?(clazz) }
if classes.size != 1
raise ArgumentError, "parameter #{key} not #{classes.map(&:to_s).map(&:downcase).join(' or ')}"
end
class_name = classes[0].to_s.downcase
class_name = %w[a e i o u].include?(class_name[0]) ? "an #{class_name}" : "a #{class_name}"
raise ArgumentError, "parameter #{key} not #{class_name}"
end
value
end
end
Version data entries
36 entries across 36 versions & 1 rubygems