{"id":"9SrdqXrDNy","url":"https://pastebin.ca/9SrdqXrDNy","raw_url":"https://raw.anybin.ca/9SrdqXrDNy","visibility":"public","access":"public","created_at":1782856813892,"expires_at":1783461613892,"fetch_limit":null,"fetches_used":0,"reads_remaining":null,"size_bytes":5587,"syntax_hint":null,"title":null,"filename":null,"change_note":null,"cipher":null,"cipher_meta":null,"parent_id":null,"root_id":"9SrdqXrDNy","version":1,"owner_id":null,"recipient_id":null,"body":"# What requirements does this class satisfy?\n#\n# Why is this a class? does an object instance have meaning?\nclass AdvancedInventoryManager\n  attr_accessor :pricing_rules\n\n  attr_accessor :store, :tax_rate, :discount_threshold\n\n  # How is this meant to be used?\n  #\n  # use keyword args if possible; documents defaults better\n  def initialize(store_id, pricing_rules: , tax_rate: 0.08, discount_threshold:)\n\n    # store_id never validated; should look up store record first\n    @store_id = store_id\n    @products = []\n    @pricing_rules = config[:pricing_rules]\n    @tax_rate = config[:tax_rate] || 0.08\n    @discount_threshold = config[:discount_threshold]\n  end\n\n  # consider lazy instantiators like this for products\n  def products\n    return @products if defined?(@products)\n\n    @products = build_products # calls import_inventor behind the scenes\n  end\n\n  # make a class method `from_file`\n  def import_inventory(file_path, format: 'csv')\n    begin\n      data = File.read(file_path)\n    rescue\n      puts \"Error reading file\"\n    end\n\n    case format\n    when 'csv'\n      parse_csv(data)\n    when 'json' #DEAD CODE, will error\n      parse_json(data)\n    when 'xml' #DEAD CODE, will error\n      parse_xml(data)\n    end\n\n    validate_products\n    sync_to_database\n\n    return @products.size\n  end\n\n  # move helper methods to private\n  def parse_csv(data)\n    lines = data.split(\"\\n\")\n    lines.each_with_index do |line, index|\n      next if index = 0\n\n      parts = line.split(\",\")\n      @products << create_product(parts[0], parts[1], parts[2], parts[3])\n    end\n  end\n\n  \n  def create_product(name, price, quantity, category)\n    {\n      name: name.strip,\n      price: price.to_f,\n      quantity: quantity.to_i,\n      category: category.strip.upcase,\n      store_id: @store_id,\n      created_at: Time.now\n    }\n  end\n\n  def sync_to_database\n    @products.each do |product|\n\n      # consider find_or_create here. don't use interpolated SQL\n      existing = Product.where(\"name = '#{product[:name]}' AND store_id = #{@store_id}\").first\n      # product = Product.find_or_create(name: product[:name], store: )\n\n      if existing\n        existing.update(\n          price: product[:price],\n          quantity: existing.quantity + product[:quantity]\n        )\n      else\n        Product.create(product)\n      end\n    end\n  end\n\n  def search_products(search_term)\n    query = \"SELECT * FROM products WHERE name LIKE '%#{search_term}%' AND store_id = #{@store_id}\" # use AR/arel\n    results = ActiveRecord::Base.connection.execute(query)\n    results.to_a\n  end\n\n  def get_product_by_id(product_id)\n    sql = \"SELECT * FROM products WHERE id = #{product_id}\" # use activerecord\n    Product.find_by_sql(sql).first\n  end\n\n  def delete_old_inventory(category_name)\n    delete_query = \"DELETE FROM products WHERE category = '#{category_name}' AND store_id = #{@store_id} AND updated_at < '#{30.days.ago}'\" #use AR/arel\n    ActiveRecord::Base.connection.execute(delete_query)\n  end\n\n\n  def calculate_total_value(apply_tax = true)\n    total = 0\n    \n    \n    @products.each do |product| # use Enumerable.map and sum\n      subtotal = product[:price] * product[:quantity]\n\n\n      # make pricing rules a class? add as helper method\n      if @pricing_rules && @pricing_rules[product[:category]]\n        discount = @pricing_rules[product[:category]][:discount]\n        subtotal = subtotal - (subtotal * discount)\n      end\n\n      total += subtotal\n    end\n\n    if apply_tax\n      total = total + (total * @tax_rate)\n    end\n\n    total.round(2)\n  end\n\n  def generate_report(email_to)\n\n    # This wants to be a PORO\n    report_data = {\n      store_id: @store_id,\n      total_products: @products.length,\n      total_value: calculate_total_value,\n      timestamp: Time.now.strftime(\"%Y-%m-%d %H:%M:%S\")\n    }\n\n    categories = {}\n\n    # PORO report_data: have an add_product method, or a from_products class method (even better!)\n    @products.each do |product|\n      if categories[product[:category]]\n        categories[product[:category]][:count] += product[:quantity]\n        categories[product[:category]][:value] += product[:price] * product[:quantity]\n      else\n        categories[product[:category]] = {\n          count: product[:quantity],\n          value: product[:price] * product[:quantity]\n        }\n      end\n    end\n\n    report_data[:categories] = categories\n\n    send_report_email(email_to, report_data)\n    save_report_to_file(report_data)\n\n    report_data\n  end\n\n  def apply_bulk_discount(category, discount_percent)\n    products_in_category = @products.select { |p| p[:category] == category }\n\n    if products_in_category.length < @discount_threshold\n      raise \"Not enough products to apply bulk discount\"\n    end\n\n    products_in_category.each do |product\n      original_price = product[:price]\n      product[:price] = original_price - (original_price * discount_percent / 100)\n\n      # HERE BE DRAGONS (callbacks go out the window)\n      Product.where(name: product[:name], store_id: @store_id).update_all(price: product[:price])\n    end\n  end\n\n  private\n\n  def validate_products\n    @products.reject! do |product|\n      product[:price] <= 0 or product[:quantity] < 0 or product[:name].empty?\n    end\n  end\n\n  def send_report_email(email, data\n    InventoryMailer.report(email, data).deliver_later\n  end\n\n  def save_report_to_file(data)\n    File.open(\"/tmp/inventory_report_#{@store_id}_#{Time.now.to_i}.json\", 'w') do |f|\n      f.write(JSON.generate(data))\n    end\n  end\n\n  def parse_json(data)\n    # JSON parsing logic\n  end\n\n  def parse_xml(data)\n    # XML parsing logic\n  end\nend\n"}