Transfer and Payment auto-matching, model and UI improvements (#1585)

* Transfer data model migration

* Transfers and payment modeling and UI improvements

* Fix CI

* Transfer matching flow

* Better UI for transfers

* Auto transfer matching, approve, reject flow

* Mark transfers created from form as confirmed

* Account filtering

* Excluded rejected transfers from calculations

* Calculation tweaks with transfer exclusions

* Clean up migration

app/controllers/account/transfer_matches_controller.rb

@@ -0,0 +1,56 @@
+class Account::TransferMatchesController < ApplicationController
+  before_action :set_entry
+
+  def new
+    @accounts = Current.family.accounts.alphabetically.where.not(id: @entry.account_id)
+    @transfer_match_candidates = @entry.transfer_match_candidates
+  end
+
+  def create
+    @transfer = build_transfer
+    @transfer.save!
+    @transfer.sync_account_later
+
+    redirect_back_or_to transactions_path, notice: t(".success")
+  end
+
+  private
+    def set_entry
+      @entry = Current.family.entries.find(params[:transaction_id])
+    end
+
+    def transfer_match_params
+      params.require(:transfer_match).permit(:method, :matched_entry_id, :target_account_id)
+    end
+
+    def build_transfer
+      if transfer_match_params[:method] == "new"
+        target_account = Current.family.accounts.find(transfer_match_params[:target_account_id])
+
+        missing_transaction = Account::Transaction.new(
+          entry: target_account.entries.build(
+            amount: @entry.amount * -1,
+            currency: @entry.currency,
+            date: @entry.date,
+            name: "Transfer to #{@entry.amount.negative? ? @entry.account.name : target_account.name}",
+          )
+        )
+
+        transfer = Transfer.find_or_initialize_by(
+          inflow_transaction: @entry.amount.positive? ? missing_transaction : @entry.account_transaction,
+          outflow_transaction: @entry.amount.positive? ? @entry.account_transaction : missing_transaction
+        )
+        transfer.status = "confirmed"
+        transfer
+      else
+        target_transaction = Current.family.entries.find(transfer_match_params[:matched_entry_id])
+
+        transfer = Transfer.find_or_initialize_by(
+          inflow_transaction: @entry.amount.negative? ? @entry.account_transaction : target_transaction.account_transaction,
+          outflow_transaction: @entry.amount.negative? ? target_transaction.account_transaction : @entry.account_transaction
+        )
+        transfer.status = "confirmed"
+        transfer
+      end
+    end
+end