refactor: component manager usecases (#2354)

packages/snjs/lib/Services/ComponentManager/UseCase/DoesEditorChangeRequireAlert.ts

@@ -0,0 +1,24 @@
+import { EditorFeatureDescription, IframeComponentFeatureDescription } from '@standardnotes/features'
+import { UIFeature } from '@standardnotes/models'
+
+export class DoesEditorChangeRequireAlertUseCase {
+  execute(
+    from: UIFeature<IframeComponentFeatureDescription | EditorFeatureDescription> | undefined,
+    to: UIFeature<IframeComponentFeatureDescription | EditorFeatureDescription> | undefined,
+  ): boolean {
+    if (!from || !to) {
+      return false
+    }
+
+    const fromFileType = from.fileType
+    const toFileType = to.fileType
+    const isEitherMarkdown = fromFileType === 'md' || toFileType === 'md'
+    const areBothHtml = fromFileType === 'html' && toFileType === 'html'
+
+    if (isEitherMarkdown || areBothHtml) {
+      return false
+    } else {
+      return true
+    }
+  }
+}