missing_template.rb

# frozen_string_literal: true
module ThemeCheck
  # Reports missing include/render/section liquid file
  class MissingTemplate < LiquidCheck
    severity :suggestion
    category :liquid
    doc docs_url(__FILE__)
    single_file false

    def initialize(ignore_missing: [])
      @ignore_missing = ignore_missing
    end

    def on_include(node)
      snippet = node.value.template_name_expr
      if snippet.is_a?(String)
        add_missing_offense(filename_for(snippet), node: node)
      end
    end

    alias_method :on_render, :on_include

    private

    def filename_for(name)
      name.include?("/") ? name : "partials/#{name}"
    end

    def ignore?(path)
      all_ignored_patterns.any? { |pattern| File.fnmatch?(pattern, path) }
    end

    def all_ignored_patterns
      @all_ignored_patterns ||= @ignore_missing + ignored_patterns
    end

    def add_missing_offense(name, node:)
      path = "#{name}.liquid"
      unless ignore?(path) || theme[Pathname.new(path)]
        add_offense("'#{path}' is not found", node: node) do |corrector|
          corrector.create_file(@theme.storage, "#{name}.liquid", "")
        end
      end
    end
  end
end