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feat: Access params ActionMailer::Preview style #1970

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feat: Access params ActionMailer::Preview style #1970

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19 changes: 17 additions & 2 deletions lib/view_component/preview.rb
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Original file line number Diff line number Diff line change
@@ -1,5 +1,6 @@
# frozen_string_literal: true

require "active_support/core_ext/object/blank"
require "active_support/descendants_tracker"

module ViewComponent # :nodoc:
Expand All @@ -13,6 +14,12 @@ class Preview
include ActionView::Helpers::AssetTagHelper
extend ActiveSupport::DescendantsTracker

attr_reader :params

def initialize(params = {})
@params = params
end

def render(component, **args, &block)
{
args: args,
Expand Down Expand Up @@ -43,8 +50,16 @@ def all
# Returns the arguments for rendering of the component in its layout
def render_args(example, params: {})
example_params_names = instance_method(example).parameters.map(&:last)
provided_params = params.slice(*example_params_names).to_h.symbolize_keys
result = provided_params.empty? ? new.public_send(example) : new.public_send(example, **provided_params)

result =
if example_params_names.blank?
new(params).public_send(example)
else
Deprecation.deprecation_warning("Preview variant arguments are deprecated, user params instead")
provided_params = params.slice(*example_params_names).to_h.symbolize_keys
new(params).public_send(example, **provided_params)
end

result ||= {}
result[:template] = preview_example_template_path(example) if result[:template].nil?
@layout = nil unless defined?(@layout)
Expand Down
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