Extract amendHead function into new AmendHelper

pkg/gui/controllers/helpers/amend_helper.go

@@ -0,0 +1,36 @@
+package helpers
+
+import (
+	"github.com/jesseduffield/lazygit/pkg/commands"
+	"github.com/jesseduffield/lazygit/pkg/gui/types"
+)
+
+type AmendHelper struct {
+	c   *types.HelperCommon
+	git *commands.GitCommand
+	gpg *GpgHelper
+}
+
+func NewAmendHelper(
+	c *types.HelperCommon,
+	git *commands.GitCommand,
+	gpg *GpgHelper,
+) *AmendHelper {
+	return &AmendHelper{
+		c:   c,
+		git: git,
+		gpg: gpg,
+	}
+}
+
+func (self *AmendHelper) AmendHead() error {
+	return self.c.Confirm(types.ConfirmOpts{
+		Title:  self.c.Tr.AmendLastCommitTitle,
+		Prompt: self.c.Tr.SureToAmend,
+		HandleConfirm: func() error {
+			cmdObj := self.git.Commit.AmendHeadCmdObj()
+			self.c.LogAction(self.c.Tr.Actions.AmendCommit)
+			return self.gpg.WithGpgHandling(cmdObj, self.c.Tr.AmendingStatus, nil)
+		},
+	})
+}