require 'test_helper'

class ContextDrop < Liquid::Drop
  def scopes
    @context.scopes.size
  end

  def scopes_as_array
    (1..@context.scopes.size).to_a
  end

  def loop_pos
    @context['forloop.index']
  end

  def liquid_method_missing(method)
    @context[method]
  end
end

class ProductDrop < Liquid::Drop
  class TextDrop < Liquid::Drop
    def array
      ['text1', 'text2']
    end

    def text
      'text1'
    end
  end

  class CatchallDrop < Liquid::Drop
    def liquid_method_missing(method)
      'catchall_method: ' << method.to_s
    end
  end

  def texts
    TextDrop.new
  end

  def catchall
    CatchallDrop.new
  end

  def context
    ContextDrop.new
  end

  def user_input
    "foo".taint
  end

  protected

  def callmenot
    "protected"
  end
end

class EnumerableDrop < Liquid::Drop
  def liquid_method_missing(method)
    method
  end

  def size
    3
  end

  def first
    1
  end

  def count
    3
  end

  def min
    1
  end

  def max
    3
  end

  def each
    yield 1
    yield 2
    yield 3
  end
end

class RealEnumerableDrop < Liquid::Drop
  include Enumerable

  def liquid_method_missing(method)
    method
  end

  def each
    yield 1
    yield 2
    yield 3
  end
end

class DropsTest < Minitest::Test
  include Liquid

  def test_product_drop
    tpl = Liquid::Template.parse('  ')
    assert_equal '  ', tpl.render!('product' => ProductDrop.new)
  end

  def test_rendering_raises_on_tainted_attr
    skip "Skip check. #{RUBY_ENGINE} #{RUBY_VERSION} doesn't support taint checking" if RUBY_VERSION >= '2.7'
    with_taint_mode(:error) do
      tpl = Liquid::Template.parse('{{ product.user_input }}')
      assert_raises TaintedError do
        tpl.render!('product' => ProductDrop.new)
      end
    end
  end

  def test_rendering_warns_on_tainted_attr
    skip "Skip check. #{RUBY_ENGINE} #{RUBY_VERSION} doesn't support taint checking" if RUBY_VERSION >= '2.7'
    with_taint_mode(:warn) do
      tpl = Liquid::Template.parse('{{ product.user_input }}')
      context = Context.new('product' => ProductDrop.new)
      tpl.render!(context)
      assert_equal [Liquid::TaintedError], context.warnings.map(&:class)
      assert_equal "variable 'product.user_input' is tainted and was not escaped", context.warnings.first.to_s(false)
    end
  end

  def test_rendering_doesnt_raise_on_escaped_tainted_attr
    skip "Skip check. #{RUBY_ENGINE} #{RUBY_VERSION} doesn't support taint checking" if RUBY_VERSION >= '2.7'
    with_taint_mode(:error) do
      tpl = Liquid::Template.parse('{{ product.user_input | escape }}')
      tpl.render!('product' => ProductDrop.new)
    end
  end

  def test_drop_does_only_respond_to_whitelisted_methods
    assert_equal "", Liquid::Template.parse("{{ product.inspect }}").render!('product' => ProductDrop.new)
    assert_equal "", Liquid::Template.parse("{{ product.pretty_inspect }}").render!('product' => ProductDrop.new)
    assert_equal "", Liquid::Template.parse("{{ product.whatever }}").render!('product' => ProductDrop.new)
    assert_equal "", Liquid::Template.parse('{{ product | map: "inspect" }}').render!('product' => ProductDrop.new)
    assert_equal "", Liquid::Template.parse('{{ product | map: "pretty_inspect" }}').render!('product' => ProductDrop.new)
    assert_equal "", Liquid::Template.parse('{{ product | map: "whatever" }}').render!('product' => ProductDrop.new)
  end

  def test_drops_respond_to_to_liquid
    assert_equal "text1", Liquid::Template.parse("{{ product.to_liquid.texts.text }}").render!('product' => ProductDrop.new)
    assert_equal "text1", Liquid::Template.parse('{{ product | map: "to_liquid" | map: "texts" | map: "text" }}').render!('product' => ProductDrop.new)
  end

  def test_text_drop
    output = Liquid::Template.parse(' {{ product.texts.text }} ').render!('product' => ProductDrop.new)
    assert_equal ' text1 ', output
  end

  def test_catchall_unknown_method
    output = Liquid::Template.parse(' {{ product.catchall.unknown }} ').render!('product' => ProductDrop.new)
    assert_equal ' catchall_method: unknown ', output
  end

  def test_catchall_integer_argument_drop
    output = Liquid::Template.parse(' {{ product.catchall[8] }} ').render!('product' => ProductDrop.new)
    assert_equal ' catchall_method: 8 ', output
  end

  def test_text_array_drop
    output = Liquid::Template.parse('{% for text in product.texts.array %} {{text}} {% endfor %}').render!('product' => ProductDrop.new)
    assert_equal ' text1  text2 ', output
  end

  def test_context_drop
    output = Liquid::Template.parse(' {{ context.bar }} ').render!('context' => ContextDrop.new, 'bar' => "carrot")
    assert_equal ' carrot ', output
  end

  def test_nested_context_drop
    output = Liquid::Template.parse(' {{ product.context.foo }} ').render!('product' => ProductDrop.new, 'foo' => "monkey")
    assert_equal ' monkey ', output
  end

  def test_protected
    output = Liquid::Template.parse(' {{ product.callmenot }} ').render!('product' => ProductDrop.new)
    assert_equal '  ', output
  end

  def test_object_methods_not_allowed
    [:dup, :clone, :singleton_class, :eval, :class_eval, :inspect].each do |method|
      output = Liquid::Template.parse(" {{ product.#{method} }} ").render!('product' => ProductDrop.new)
      assert_equal '  ', output
    end
  end

  def test_scope
    assert_equal '1', Liquid::Template.parse('{{ context.scopes }}').render!('context' => ContextDrop.new)
    assert_equal '2', Liquid::Template.parse('{%for i in dummy%}{{ context.scopes }}{%endfor%}').render!('context' => ContextDrop.new, 'dummy' => [1])
    assert_equal '3', Liquid::Template.parse('{%for i in dummy%}{%for i in dummy%}{{ context.scopes }}{%endfor%}{%endfor%}').render!('context' => ContextDrop.new, 'dummy' => [1])
  end

  def test_scope_though_proc
    assert_equal '1', Liquid::Template.parse('{{ s }}').render!('context' => ContextDrop.new, 's' => proc{ |c| c['context.scopes'] })
    assert_equal '2', Liquid::Template.parse('{%for i in dummy%}{{ s }}{%endfor%}').render!('context' => ContextDrop.new, 's' => proc{ |c| c['context.scopes'] }, 'dummy' => [1])
    assert_equal '3', Liquid::Template.parse('{%for i in dummy%}{%for i in dummy%}{{ s }}{%endfor%}{%endfor%}').render!('context' => ContextDrop.new, 's' => proc{ |c| c['context.scopes'] }, 'dummy' => [1])
  end

  def test_scope_with_assigns
    assert_equal 'variable', Liquid::Template.parse('{% assign a = "variable"%}{{a}}').render!('context' => ContextDrop.new)
    assert_equal 'variable', Liquid::Template.parse('{% assign a = "variable"%}{%for i in dummy%}{{a}}{%endfor%}').render!('context' => ContextDrop.new, 'dummy' => [1])
    assert_equal 'test', Liquid::Template.parse('{% assign header_gif = "test"%}{{header_gif}}').render!('context' => ContextDrop.new)
    assert_equal 'test', Liquid::Template.parse("{% assign header_gif = 'test'%}{{header_gif}}").render!('context' => ContextDrop.new)
  end

  def test_scope_from_tags
    assert_equal '1', Liquid::Template.parse('{% for i in context.scopes_as_array %}{{i}}{% endfor %}').render!('context' => ContextDrop.new, 'dummy' => [1])
    assert_equal '12', Liquid::Template.parse('{%for a in dummy%}{% for i in context.scopes_as_array %}{{i}}{% endfor %}{% endfor %}').render!('context' => ContextDrop.new, 'dummy' => [1])
    assert_equal '123', Liquid::Template.parse('{%for a in dummy%}{%for a in dummy%}{% for i in context.scopes_as_array %}{{i}}{% endfor %}{% endfor %}{% endfor %}').render!('context' => ContextDrop.new, 'dummy' => [1])
  end

  def test_access_context_from_drop
    assert_equal '123', Liquid::Template.parse('{%for a in dummy%}{{ context.loop_pos }}{% endfor %}').render!('context' => ContextDrop.new, 'dummy' => [1, 2, 3])
  end

  def test_enumerable_drop
    assert_equal '123', Liquid::Template.parse('{% for c in collection %}{{c}}{% endfor %}').render!('collection' => EnumerableDrop.new)
  end

  def test_enumerable_drop_size
    assert_equal '3', Liquid::Template.parse('{{collection.size}}').render!('collection' => EnumerableDrop.new)
  end

  def test_enumerable_drop_will_invoke_liquid_method_missing_for_clashing_method_names
    ["select", "each", "map", "cycle"].each do |method|
      assert_equal method.to_s, Liquid::Template.parse("{{collection.#{method}}}").render!('collection' => EnumerableDrop.new)
      assert_equal method.to_s, Liquid::Template.parse("{{collection[\"#{method}\"]}}").render!('collection' => EnumerableDrop.new)
      assert_equal method.to_s, Liquid::Template.parse("{{collection.#{method}}}").render!('collection' => RealEnumerableDrop.new)
      assert_equal method.to_s, Liquid::Template.parse("{{collection[\"#{method}\"]}}").render!('collection' => RealEnumerableDrop.new)
    end
  end

  def test_some_enumerable_methods_still_get_invoked
    [ :count, :max ].each do |method|
      assert_equal "3", Liquid::Template.parse("{{collection.#{method}}}").render!('collection' => RealEnumerableDrop.new)
      assert_equal "3", Liquid::Template.parse("{{collection[\"#{method}\"]}}").render!('collection' => RealEnumerableDrop.new)
      assert_equal "3", Liquid::Template.parse("{{collection.#{method}}}").render!('collection' => EnumerableDrop.new)
      assert_equal "3", Liquid::Template.parse("{{collection[\"#{method}\"]}}").render!('collection' => EnumerableDrop.new)
    end

    assert_equal "yes", Liquid::Template.parse("{% if collection contains 3 %}yes{% endif %}").render!('collection' => RealEnumerableDrop.new)

    [ :min, :first ].each do |method|
      assert_equal "1", Liquid::Template.parse("{{collection.#{method}}}").render!('collection' => RealEnumerableDrop.new)
      assert_equal "1", Liquid::Template.parse("{{collection[\"#{method}\"]}}").render!('collection' => RealEnumerableDrop.new)
      assert_equal "1", Liquid::Template.parse("{{collection.#{method}}}").render!('collection' => EnumerableDrop.new)
      assert_equal "1", Liquid::Template.parse("{{collection[\"#{method}\"]}}").render!('collection' => EnumerableDrop.new)
    end
  end

  def test_empty_string_value_access
    assert_equal '', Liquid::Template.parse('{{ product[value] }}').render!('product' => ProductDrop.new, 'value' => '')
  end

  def test_nil_value_access
    assert_equal '', Liquid::Template.parse('{{ product[value] }}').render!('product' => ProductDrop.new, 'value' => nil)
  end

  def test_default_to_s_on_drops
    assert_equal 'ProductDrop', Liquid::Template.parse("{{ product }}").render!('product' => ProductDrop.new)
    assert_equal 'EnumerableDrop', Liquid::Template.parse('{{ collection }}').render!('collection' => EnumerableDrop.new)
  end
end # DropsTest