refactor: pick out logic into services

src/services/imageService.ts

@@ -0,0 +1,45 @@
+import { setCurrentStep } from "../stores/uiStore";
+
+export class ImageService {
+  private static instance: ImageService;
+
+  private constructor() {}
+
+  static getInstance(): ImageService {
+    if (!ImageService.instance) {
+      ImageService.instance = new ImageService();
+    }
+    return ImageService.instance;
+  }
+
+  async loadDefaultBackground(): Promise<string> {
+    const defaultBackground = "/backgrounds/b1.jpg";
+    const response = await fetch(defaultBackground);
+    if (!response.ok) throw new Error("Не удалось загрузить фоновое изображение");
+    const blob = await response.blob();
+    return new Promise((resolve, reject) => {
+      const reader = new FileReader();
+      reader.onload = () => resolve(reader.result as string);
+      reader.onerror = reject;
+      reader.readAsDataURL(blob);
+    });
+  }
+
+  handleImageUpload(image: string): void {
+    setCurrentStep("crop");
+  }
+
+  handleUploadNewImage(): void {
+    setCurrentStep("upload");
+  }
+
+  handleCropComplete(croppedImage: string): void {
+    setCurrentStep("text");
+  }
+
+  handleCropCancel(): void {
+    setCurrentStep("text");
+  }
+}
+
+export const imageService = ImageService.getInstance();