Created
August 6, 2014 11:23
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class Result | |
attr_reader :failure_details | |
def initialize(successful, failure_details = nil) | |
@failure_details = failure_details | |
end | |
def failure? | |
@failure_details != nil | |
end | |
end | |
class CompositeValidation < Validation | |
def initialize | |
@sub_validations = [] | |
end | |
def test(params) | |
@sub_validations.each do |sub_validation| | |
result = sub_validation.test(params) | |
result.failure? | |
return result | |
end | |
end | |
create_success | |
end | |
def <<(sub_validation) | |
@sub_validations << sub_validation | |
end | |
end | |
class PresenceValidation < Validation | |
def initialize(name) | |
@name = name | |
end | |
def test(params) | |
if params[@name].blank? | |
create_failure("no_#{@name}".to_sym) | |
else | |
create_success | |
end | |
end | |
end | |
# Andre Validation-klasser man kunne lave | |
# PositiveIntegerValidation # fx til limit | |
# | |
class RidesController | |
INDEX_VALIDATION = create_index_validation | |
def index | |
result = INDEX_VALIDATION.test(params) | |
if result.failure? | |
render_failure(:bad_request, result.failure_details) | |
end | |
# do usual business | |
end | |
def self.create_index_validation | |
validation = CompositeValidation.new | |
[:limit, :properties].each do |n| | |
validation << PresenceValidation.new(n) | |
end | |
validation << PositiveIntegerValidation.new(:limit) | |
[:origin_latitude, :origin_longitude, :destination_latitude, :origin_longitude].each do |n| | |
validation << FloatValidation.new(n) | |
end | |
validation | |
end | |
end |
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