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| 1 | +# frozen_string_literal: true |
| 2 | +module SkinnyControllers |
| 3 | + # This class provides a way to determine all names / classes of operations |
| 4 | + # and policies based on he given information. |
| 5 | + # |
| 6 | + # The class methods show what is required for each scenario |
| 7 | + class Lookup |
| 8 | + include EnsureExistence |
| 9 | + include Policy |
| 10 | + |
| 11 | + class << self |
| 12 | + def from_controller(controller_class:, verb:, model_class:) |
| 13 | + Lookup.new( |
| 14 | + controller_class_name: controller_class.name, |
| 15 | + verb: verb, |
| 16 | + model_class: model_class |
| 17 | + ) |
| 18 | + end |
| 19 | + |
| 20 | + def from_operation(operation_class:) |
| 21 | + qualified_name = operation_class.name |
| 22 | + parts = qualified_name.split('::') |
| 23 | + operation_name = parts[-2] |
| 24 | + operation_parts = operation_name.split(SkinnyControllers.operations_suffix) |
| 25 | + |
| 26 | + Lookup.new( |
| 27 | + verb: parts.last, |
| 28 | + # namespace: parts[0..-3], |
| 29 | + operation_name: operation_name, |
| 30 | + operation_class: operation_class, |
| 31 | + model_name: operation_parts.first, |
| 32 | + namespace: qualified_name.deconstantize.deconstantize |
| 33 | + ) |
| 34 | + end |
| 35 | + end |
| 36 | + |
| 37 | + # @param [Hash] args - all possible parameters |
| 38 | + # - @option [String] controller_class_name |
| 39 | + # - @option [Class] controller_class |
| 40 | + # - @option [String] verb |
| 41 | + # - @option [String] operation_name |
| 42 | + # - @option [String] model_name |
| 43 | + # - @option [Class] model_class |
| 44 | + # - @option [Hash] options |
| 45 | + def initialize(args = {}) |
| 46 | + @controller_class_name = args[:controller_class_name] |
| 47 | + @controller_class = args[:controller_class] |
| 48 | + @verb_for_action = args[:verb] |
| 49 | + @operation_name = args[:operation_name] |
| 50 | + @operation_class = args[:operation_class] |
| 51 | + @model_name = args[:model_name] |
| 52 | + @namespace = args[:namespace] |
| 53 | + @model_class = args[:model_class] |
| 54 | + @policy_method_name = args[:policy_method_name] |
| 55 | + @options = args[:options] || {} |
| 56 | + end |
| 57 | + |
| 58 | + # PostsController |
| 59 | + # => PostOperations::Verb |
| 60 | + # |
| 61 | + # Api::V2::PostsController |
| 62 | + # => Api::V2::PostOperations::Verb |
| 63 | + def operation_class |
| 64 | + @operation_class ||= begin |
| 65 | + ensure_namespace!(operation_namespace) if operation_namespace.present? |
| 66 | + ensure_operation_class!(namespaced_operation_name) |
| 67 | + end |
| 68 | + end |
| 69 | + |
| 70 | + def policy_class |
| 71 | + @policy_class ||= begin |
| 72 | + ensure_namespace!(namespace) if namespace.present? |
| 73 | + ensure_policy_class!(namespaced_policy_name) |
| 74 | + end |
| 75 | + end |
| 76 | + |
| 77 | + def policy_method_name |
| 78 | + @policy_method_name ||= @verb_for_action.underscore + POLICY_METHOD_SUFFIX |
| 79 | + end |
| 80 | + |
| 81 | + def model_class |
| 82 | + @model_class ||= @options[:model_class] || model_name.safe_constantize |
| 83 | + end |
| 84 | + |
| 85 | + def model_name |
| 86 | + @model_name ||= @model_class.try(:name) || resource_parts[-1].singularize |
| 87 | + end |
| 88 | + |
| 89 | + # @return [String] name of the supposed operation class |
| 90 | + def namespaced_operation_name |
| 91 | + @namespaced_operation_name ||= [ |
| 92 | + operation_namespace, |
| 93 | + @verb_for_action |
| 94 | + ].reject(&:blank?).join('::') |
| 95 | + end |
| 96 | + |
| 97 | + def namespaced_policy_name |
| 98 | + @namespaced_policy_name ||= [ |
| 99 | + namespace, |
| 100 | + "#{model_name}#{SkinnyControllers.policy_suffix}" |
| 101 | + ].reject(&:blank?).join('::') |
| 102 | + end |
| 103 | + |
| 104 | + def operation_namespace |
| 105 | + @operation_namespace ||= [ |
| 106 | + namespace, |
| 107 | + operation_name |
| 108 | + ].reject(&:blank?).join('::') |
| 109 | + end |
| 110 | + |
| 111 | + def operation_name |
| 112 | + @operation_name ||= "#{model_name}#{SkinnyControllers.operations_suffix}" |
| 113 | + end |
| 114 | + |
| 115 | + # @return [String] the namespace |
| 116 | + def namespace |
| 117 | + @namespace ||= begin |
| 118 | + resource_parts.length > 2 ? resource_parts[0..-2].join('::') : '' |
| 119 | + end |
| 120 | + end |
| 121 | + |
| 122 | + # PostsController |
| 123 | + # => Posts |
| 124 | + # |
| 125 | + # Api::V2::PostsController |
| 126 | + # => Api, V2, Posts |
| 127 | + def resource_parts |
| 128 | + @resource_parts ||= controller_class_name.split(/::|Controller/) |
| 129 | + end |
| 130 | + |
| 131 | + def controller_class_name |
| 132 | + @controller_class_name ||= @controller_class.name |
| 133 | + end |
| 134 | + end |
| 135 | +end |
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