Deposit, Withdrawal, and Interest Transactions for Investment View (#1075)

* Trade and Transaction builders

* Consolidate logic

* Remove redundant fields from trade form

* Add deposit, withdrawal, and interest form controls

app/models/account/entry_builder.rb

@@ -0,0 +1,45 @@
+class Account::EntryBuilder
+  include ActiveModel::Model
+
+  TYPES = %w[ income expense buy sell interest transfer_in transfer_out ].freeze
+
+  attr_accessor :type, :date, :qty, :ticker, :price, :amount, :currency, :account, :transfer_account_id
+
+  validates :type, inclusion: { in: TYPES }
+
+  def save
+    if valid?
+      create_builder.save
+    end
+  end
+
+  private
+
+    def create_builder
+      case type
+      when "buy", "sell"
+        create_trade_builder
+      else
+        create_transaction_builder
+      end
+    end
+
+    def create_trade_builder
+      Account::TradeBuilder.new \
+        type: type,
+        date: date,
+        qty: qty,
+        ticker: ticker,
+        price: price,
+        account: account
+    end
+
+    def create_transaction_builder
+      Account::TransactionBuilder.new \
+        type: type,
+        date: date,
+        amount: amount,
+        account: account,
+        transfer_account_id: transfer_account_id
+    end
+end