CSV Imports Overhaul (Transactions, Trades, Accounts, and Mint import support) (#1209)

* Remove stale 1.0 import logic and model

* Fresh start

* Checkpoint before removing nav

* First working prototype

* Add trade, account, and mint import flows

* Basic working version with tests

* System tests for each import type

* Clean up mappings flow

* Clean up PR, refactor stale code, tests

* Add back row validations

* Row validations

* Fix import job test

* Fix import navigation

* Fix mint import configuration form

* Currency preset for new accounts

test/models/transaction_import_test.rb

@@ -0,0 +1,66 @@
+require "test_helper"
+
+class TransactionImportTest < ActiveSupport::TestCase
+  include ActiveJob::TestHelper, ImportInterfaceTest
+
+  setup do
+    @subject = @import = imports(:transaction)
+  end
+
+  test "uploaded? if raw_file_str is present" do
+    @import.expects(:raw_file_str).returns("test").once
+    assert @import.uploaded?
+  end
+
+  test "configured? if uploaded and rows are generated" do
+    @import.expects(:uploaded?).returns(true).once
+    assert @import.configured?
+  end
+
+  test "cleaned? if rows are generated and valid" do
+    @import.expects(:configured?).returns(true).once
+    assert @import.cleaned?
+  end
+
+  test "publishable? if cleaned and mappings are valid" do
+    @import.expects(:cleaned?).returns(true).once
+    assert @import.publishable?
+  end
+
+  test "imports transactions, categories, tags, and accounts" do
+    import = <<-CSV
+      date,name,amount,category,tags,account,notes
+      01/01/2024,Txn1,100,TestCategory1,TestTag1,TestAccount1,notes1
+      01/02/2024,Txn2,200,TestCategory2,TestTag1|TestTag2,TestAccount2,notes2
+      01/03/2024,Txn3,300,,,,notes3
+    CSV
+
+    @import.update!(raw_file_str: import)
+
+    @import.generate_rows_from_csv
+
+    @import.mappings.create! key: "TestCategory1", create_when_empty: true, type: "Import::CategoryMapping"
+    @import.mappings.create! key: "TestCategory2", mappable: categories(:food_and_drink), type: "Import::CategoryMapping"
+    @import.mappings.create! key: "", create_when_empty: false, mappable: nil, type: "Import::CategoryMapping" # Leaves uncategorized
+
+    @import.mappings.create! key: "TestTag1", create_when_empty: true, type: "Import::TagMapping"
+    @import.mappings.create! key: "TestTag2", mappable: tags(:one), type: "Import::TagMapping"
+    @import.mappings.create! key: "", create_when_empty: false, mappable: nil, type: "Import::TagMapping" # Leaves untagged
+
+    @import.mappings.create! key: "TestAccount1", create_when_empty: true, type: "Import::AccountMapping"
+    @import.mappings.create! key: "TestAccount2", mappable: accounts(:depository), type: "Import::AccountMapping"
+    @import.mappings.create! key: "", mappable: accounts(:depository), type: "Import::AccountMapping"
+
+    @import.reload
+
+    assert_difference -> { Account::Entry.count } => 3,
+                      -> { Account::Transaction.count } => 3,
+                      -> { Tag.count } => 1,
+                      -> { Category.count } => 1,
+                      -> { Account.count } => 1 do
+      @import.publish
+    end
+
+    assert_equal "complete", @import.status
+  end
+end