mirror of
https://github.com/stripe/stripe-ruby.git
synced 2025-05-28 00:02:13 -04:00
444 lines
14 KiB
Ruby
444 lines
14 KiB
Ruby
module Stripe
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class StripeObject
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include Enumerable
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@@permanent_attributes = Set.new([:id])
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# The default :id method is deprecated and isn't useful to us
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if method_defined?(:id)
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undef :id
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end
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def initialize(id=nil, opts={})
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id, @retrieve_params = Util.normalize_id(id)
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@opts = Util.normalize_opts(opts)
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@original_values = {}
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@values = {}
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# This really belongs in APIResource, but not putting it there allows us
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# to have a unified inspect method
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@unsaved_values = Set.new
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@transient_values = Set.new
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@values[:id] = id if id
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end
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def self.construct_from(values, opts={})
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values = Stripe::Util.symbolize_names(values)
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# work around protected #initialize_from for now
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self.new(values[:id]).send(:initialize_from, values, opts)
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end
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# Determines the equality of two Stripe objects. Stripe objects are
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# considered to be equal if they have the same set of values and each one
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# of those values is the same.
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def ==(other)
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other.is_a?(StripeObject) && @values == other.instance_variable_get(:@values)
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end
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# Indicates whether or not the resource has been deleted on the server.
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# Note that some, but not all, resources can indicate whether they have
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# been deleted.
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def deleted?
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@values.fetch(:deleted, false)
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end
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def to_s(*args)
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JSON.pretty_generate(to_hash)
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end
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def inspect
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id_string = (self.respond_to?(:id) && !self.id.nil?) ? " id=#{self.id}" : ""
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"#<#{self.class}:0x#{self.object_id.to_s(16)}#{id_string}> JSON: " + JSON.pretty_generate(@values)
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end
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# Re-initializes the object based on a hash of values (usually one that's
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# come back from an API call). Adds or removes value accessors as necessary
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# and updates the state of internal data.
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#
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# Please don't use this method. If you're trying to do mass assignment, try
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# #initialize_from instead.
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def refresh_from(values, opts, partial=false)
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initialize_from(values, opts, partial)
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end
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extend Gem::Deprecate
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deprecate :refresh_from, "#update_attributes", 2016, 01
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# Mass assigns attributes on the model.
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#
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# This is a version of +update_attributes+ that takes some extra options
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# for internal use.
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#
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# ==== Attributes
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#
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# * +values+ - Hash of values to use to update the current attributes of
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# the object.
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# * +opts+ - Options for +StripeObject+ like an API key that will be reused
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# on subsequent API calls.
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#
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# ==== Options
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#
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# * +:dirty+ - Whether values should be initiated as "dirty" (unsaved) and
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# which applies only to new StripeObjects being initiated under this
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# StripeObject. Defaults to true.
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def update_attributes(values, opts = {}, method_options = {})
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# Default to true. TODO: Convert to optional arguments after we're off
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# 1.9 which will make this quite a bit more clear.
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dirty = method_options.fetch(:dirty, true)
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values.each do |k, v|
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add_accessors([k], values) unless metaclass.method_defined?(k.to_sym)
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@values[k] = Util.convert_to_stripe_object(v, opts)
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dirty_value!(@values[k]) if dirty
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@unsaved_values.add(k)
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end
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end
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def [](k)
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@values[k.to_sym]
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end
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def []=(k, v)
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send(:"#{k}=", v)
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end
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def keys
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@values.keys
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end
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def values
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@values.values
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end
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def to_json(*a)
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JSON.generate(@values)
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end
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def as_json(*a)
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@values.as_json(*a)
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end
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def to_hash
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maybe_to_hash = lambda do |value|
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value.respond_to?(:to_hash) ? value.to_hash : value
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end
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@values.inject({}) do |acc, (key, value)|
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acc[key] = case value
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when Array
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value.map(&maybe_to_hash)
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else
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maybe_to_hash.call(value)
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end
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acc
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end
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end
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def each(&blk)
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@values.each(&blk)
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end
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def _dump(level)
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# The StripeClient instance in @opts is not serializable and is not
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# really a property of the StripeObject, so we exclude it when
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# dumping
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opts = @opts.clone
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opts.delete(:client)
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Marshal.dump([@values, opts])
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end
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def self._load(args)
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values, opts = Marshal.load(args)
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construct_from(values, opts)
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end
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# Sets all keys within the StripeObject as unsaved so that they will be
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# included with an update when #serialize_params is called. This method is
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# also recursive, so any StripeObjects contained as values or which are
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# values in a tenant array are also marked as dirty.
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def dirty!
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@unsaved_values = Set.new(@values.keys)
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@values.each do |k, v|
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dirty_value!(v)
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end
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end
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def serialize_params(options = {})
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update_hash = {}
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@values.each do |k, v|
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# There are a few reasons that we may want to add in a parameter for
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# update:
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#
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# 1. The `force` option has been set.
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# 2. We know that it was modified.
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# 3. Its value is a StripeObject. A StripeObject may contain modified
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# values within in that its parent StripeObject doesn't know about.
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#
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unsaved = @unsaved_values.include?(k)
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if options[:force] || unsaved || v.is_a?(StripeObject)
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update_hash[k.to_sym] =
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serialize_params_value(@values[k], @original_values[k], unsaved, options[:force], key: k)
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end
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end
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# a `nil` that makes it out of `#serialize_params_value` signals an empty
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# value that we shouldn't appear in the serialized form of the object
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update_hash.reject! { |_, v| v == nil }
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update_hash
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end
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class << self
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# This class method has been deprecated in favor of the instance method
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# of the same name.
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def serialize_params(obj, options = {})
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obj.serialize_params(options)
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end
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extend Gem::Deprecate
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deprecate :serialize_params, "#serialize_params", 2016, 9
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end
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protected
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# A protected field is one that doesn't get an accessor assigned to it
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# (i.e. `obj.public = ...`) and one which is not allowed to be updated via
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# the class level `Model.update(id, { ... })`.
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def self.protected_fields
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[]
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end
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def metaclass
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class << self; self; end
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end
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def remove_accessors(keys)
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# not available in the #instance_eval below
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protected_fields = self.class.protected_fields
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metaclass.instance_eval do
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keys.each do |k|
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next if protected_fields.include?(k)
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next if @@permanent_attributes.include?(k)
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# Remove methods for the accessor's reader and writer.
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[k, :"#{k}=", :"#{k}?"].each do |method_name|
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if method_defined?(method_name)
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remove_method(method_name)
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end
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end
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end
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end
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end
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def add_accessors(keys, values)
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# not available in the #instance_eval below
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protected_fields = self.class.protected_fields
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metaclass.instance_eval do
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keys.each do |k|
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next if protected_fields.include?(k)
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next if @@permanent_attributes.include?(k)
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define_method(k) { @values[k] }
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define_method(:"#{k}=") do |v|
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if v == ""
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raise ArgumentError.new(
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"You cannot set #{k} to an empty string. " \
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"We interpret empty strings as nil in requests. " \
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"You may set (object).#{k} = nil to delete the property.")
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end
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@values[k] = Util.convert_to_stripe_object(v, @opts)
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dirty_value!(@values[k])
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@unsaved_values.add(k)
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end
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if [FalseClass, TrueClass].include?(values[k].class)
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define_method(:"#{k}?") { @values[k] }
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end
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end
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end
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end
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def method_missing(name, *args)
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# TODO: only allow setting in updateable classes.
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if name.to_s.end_with?('=')
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attr = name.to_s[0...-1].to_sym
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# Pull out the assigned value. This is only used in the case of a
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# boolean value to add a question mark accessor (i.e. `foo?`) for
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# convenience.
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val = args.first
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# the second argument is only required when adding boolean accessors
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add_accessors([attr], { attr => val })
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begin
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mth = method(name)
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rescue NameError
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raise NoMethodError.new("Cannot set #{attr} on this object. HINT: you can't set: #{@@permanent_attributes.to_a.join(', ')}")
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end
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return mth.call(args[0])
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else
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return @values[name] if @values.has_key?(name)
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end
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begin
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super
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rescue NoMethodError => e
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if @transient_values.include?(name)
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raise NoMethodError.new(e.message + ". HINT: The '#{name}' attribute was set in the past, however. It was then wiped when refreshing the object with the result returned by Stripe's API, probably as a result of a save(). The attributes currently available on this object are: #{@values.keys.join(', ')}")
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else
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raise
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end
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end
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end
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def respond_to_missing?(symbol, include_private = false)
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@values && @values.has_key?(symbol) || super
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end
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# Re-initializes the object based on a hash of values (usually one that's
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# come back from an API call). Adds or removes value accessors as necessary
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# and updates the state of internal data.
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#
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# Protected on purpose! Please do not expose.
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#
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# ==== Options
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#
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# * +:values:+ Hash used to update accessors and values.
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# * +:opts:+ Options for StripeObject like an API key.
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# * +:partial:+ Indicates that the re-initialization should not attempt to
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# remove accessors.
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def initialize_from(values, opts, partial=false)
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@opts = Util.normalize_opts(opts)
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@original_values = Marshal.load(Marshal.dump(values)) # deep copy
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removed = partial ? Set.new : Set.new(@values.keys - values.keys)
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added = Set.new(values.keys - @values.keys)
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# Wipe old state before setting new. This is useful for e.g. updating a
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# customer, where there is no persistent card parameter. Mark those values
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# which don't persist as transient
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remove_accessors(removed)
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add_accessors(added, values)
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removed.each do |k|
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@values.delete(k)
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@transient_values.add(k)
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@unsaved_values.delete(k)
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end
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update_attributes(values, opts, :dirty => false)
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values.each do |k, _|
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@transient_values.delete(k)
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@unsaved_values.delete(k)
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end
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self
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end
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def serialize_params_value(value, original, unsaved, force, key: nil)
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case true
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when value == nil
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''
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# The logic here is that essentially any object embedded in another
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# object that had a `type` is actually an API resource of a different
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# type that's been included in the response. These other resources must
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# be updated from their proper endpoints, and therefore they are not
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# included when serializing even if they've been modified.
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#
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# There are _some_ known exceptions though.
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#
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# For example, if the value is unsaved (meaning the user has set it), and
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# it looks like the API resource is persisted with an ID, then we include
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# the object so that parameters are serialized with a reference to its
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# ID.
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#
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# Another example is that on save API calls it's sometimes desirable to
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# update a customer's default source by setting a new card (or other)
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# object with `#source=` and then saving the customer. The
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# `#save_with_parent` flag to override the default behavior allows us to
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# handle these exceptions.
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#
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# We throw an error if a property was set explicitly but we can't do
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# anything with it because the integration is probably not working as the
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# user intended it to.
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when value.is_a?(APIResource) && !value.save_with_parent
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if !unsaved
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nil
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elsif value.respond_to?(:id) && value.id != nil
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value
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else
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raise ArgumentError, "Cannot save property `#{key}` containing " \
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"an API resource. It doesn't appear to be persisted and is " \
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"not marked as `save_with_parent`."
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end
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when value.is_a?(Array)
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update = value.map { |v| serialize_params_value(v, nil, true, force) }
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# This prevents an array that's unchanged from being resent.
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if update != serialize_params_value(original, nil, true, force)
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update
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else
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nil
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end
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# Handle a Hash for now, but in the long run we should be able to
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# eliminate all places where hashes are stored as values internally by
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# making sure any time one is set, we convert it to a StripeObject. This
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# will simplify our model by making data within an object more
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# consistent.
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#
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# For now, you can still run into a hash if someone appends one to an
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# existing array being held by a StripeObject. This could happen for
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# example by appending a new hash onto `additional_owners` for an
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# account.
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when value.is_a?(Hash)
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Util.convert_to_stripe_object(value, @opts).serialize_params
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when value.is_a?(StripeObject)
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update = value.serialize_params(:force => force)
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# If the entire object was replaced, then we need blank each field of
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# the old object that held a value. The new serialized values will
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# override any of these empty values.
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update = empty_values(original).merge(update) if original && unsaved
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update
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else
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value
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end
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end
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private
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def dirty_value!(value)
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case value
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when Array
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value.map { |v| dirty_value!(v) }
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when StripeObject
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value.dirty!
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end
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end
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# Returns a hash of empty values for all the values that are in the given
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# StripeObject.
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def empty_values(obj)
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values = case obj
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when Hash then obj
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when StripeObject then obj.instance_variable_get(:@values)
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else
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raise ArgumentError, "#empty_values got unexpected object type: #{obj.class.name}"
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end
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values.inject({}) do |update, (k, _)|
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update[k] = ''
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update
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end
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end
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end
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end
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