Begin refactoring gui

This begins a big refactor of moving more code out of the Gui struct into contexts, controllers, and helpers. We also move some code into structs in the
gui package purely for the sake of better encapsulation

pkg/gui/controllers/helpers/update_helper.go

@@ -0,0 +1,98 @@
+package helpers
+
+import (
+	"github.com/jesseduffield/lazygit/pkg/gui/types"
+	"github.com/jesseduffield/lazygit/pkg/updates"
+	"github.com/jesseduffield/lazygit/pkg/utils"
+)
+
+type UpdateHelper struct {
+	c       *types.HelperCommon
+	updater *updates.Updater
+}
+
+func NewUpdateHelper(c *types.HelperCommon, updater *updates.Updater) *UpdateHelper {
+	return &UpdateHelper{
+		c:       c,
+		updater: updater,
+	}
+}
+
+func (self *UpdateHelper) CheckForUpdateInBackground() error {
+	self.updater.CheckForNewUpdate(func(newVersion string, err error) error {
+		if err != nil {
+			// ignoring the error for now so that I'm not annoying users
+			self.c.Log.Error(err.Error())
+			return nil
+		}
+		if newVersion == "" {
+			return nil
+		}
+		if self.c.UserConfig.Update.Method == "background" {
+			self.startUpdating(newVersion)
+			return nil
+		}
+		return self.showUpdatePrompt(newVersion)
+	}, false)
+
+	return nil
+}
+
+func (self *UpdateHelper) CheckForUpdateInForeground() error {
+	return self.c.WithWaitingStatus(self.c.Tr.CheckingForUpdates, func() error {
+		self.updater.CheckForNewUpdate(func(newVersion string, err error) error {
+			if err != nil {
+				return self.c.Error(err)
+			}
+			if newVersion == "" {
+				return self.c.ErrorMsg(self.c.Tr.FailedToRetrieveLatestVersionErr)
+			}
+			return self.showUpdatePrompt(newVersion)
+		}, true)
+
+		return nil
+	})
+}
+
+func (self *UpdateHelper) startUpdating(newVersion string) {
+	_ = self.c.WithWaitingStatus(self.c.Tr.UpdateInProgressWaitingStatus, func() error {
+		self.c.State().SetUpdating(true)
+		err := self.updater.Update(newVersion)
+		return self.onUpdateFinish(err)
+	})
+}
+
+func (self *UpdateHelper) onUpdateFinish(err error) error {
+	self.c.State().SetUpdating(false)
+	self.c.OnUIThread(func() error {
+		self.c.SetViewContent(self.c.Views().AppStatus, "")
+		if err != nil {
+			errMessage := utils.ResolvePlaceholderString(
+				self.c.Tr.UpdateFailedErr, map[string]string{
+					"errMessage": err.Error(),
+				},
+			)
+			return self.c.ErrorMsg(errMessage)
+		}
+		return self.c.Alert(self.c.Tr.UpdateCompletedTitle, self.c.Tr.UpdateCompleted)
+	})
+
+	return nil
+}
+
+func (self *UpdateHelper) showUpdatePrompt(newVersion string) error {
+	message := utils.ResolvePlaceholderString(
+		self.c.Tr.UpdateAvailable, map[string]string{
+			"newVersion": newVersion,
+		},
+	)
+
+	return self.c.Confirm(types.ConfirmOpts{
+		Title:  self.c.Tr.UpdateAvailableTitle,
+		Prompt: message,
+		HandleConfirm: func() error {
+			self.startUpdating(newVersion)
+			return nil
+		},
+	})
+}