chore: init commit

in worker.../repo/GITFOLDER.zip is the .git folder.

worker-toolkit-stocks-in-the-future/repo/app/models/portfolio_position.rb

@@ -0,0 +1,55 @@
+# frozen_string_literal: true
+
+class PortfolioPosition
+  attr_reader :stock, :shares, :portfolio, :change_amount, :total_return_amount
+
+  delegate :current_price, :price_cents, :ticker, to: :stock, prefix: :stock
+
+  def initialize(stock:, shares:, portfolio: nil, financial_data: {})
+    @stock = stock
+    @shares = shares
+    @portfolio = portfolio
+    @change_amount = financial_data[:change_amount]
+    @total_return_amount = financial_data[:total_return_amount]
+  end
+
+  def current_value
+    shares * stock_current_price
+  end
+
+  def current_value_cents
+    shares * stock_price_cents
+  end
+
+  def self.for_portfolio(portfolio)
+    Stock
+      .joins(:portfolio_stocks)
+      .where(portfolio_stocks: { portfolio_id: portfolio.id })
+      .group("stocks.id")
+      .having("SUM(portfolio_stocks.shares) > 0")
+      .select(
+        <<~SQL.squish
+          stocks.*,
+          SUM(portfolio_stocks.shares) AS total_shares,
+          (stocks.price_cents / 100.0) * SUM(portfolio_stocks.shares) -
+          SUM(portfolio_stocks.purchase_price * portfolio_stocks.shares) AS aggregated_change_amount,
+          (stocks.price_cents / 100.0) * SUM(portfolio_stocks.shares) AS aggregated_total_return
+        SQL
+      )
+      .map { |result| build_position(result, portfolio) }
+  end
+
+  def self.build_position(result, portfolio)
+    new(
+      stock: result,
+      shares: result.total_shares,
+      portfolio: portfolio,
+      financial_data: {
+        change_amount: result.aggregated_change_amount,
+        total_return_amount: result.aggregated_total_return
+      }
+    )
+  end
+
+  private_class_method :build_position
+end