refactor(core): zero circulars + esm ready (#10770)

packages/core/http/http-shared.ts

@@ -0,0 +1,21 @@
+// Shared types and interfaces for http and image-source modules.
+// Only put platform-agnostic types/interfaces here.
+
+// Example: (add more as needed)
+// TODO: look at removing this after circulars are completely resolved.
+export interface ImageSourceLike {
+	toBase64String(format: string, quality?: number): string;
+	// ... add other shared methods/properties as needed
+}
+
+// Circular dependency resolution handling (http <--> image-source)
+let _getImage: (arg: any) => Promise<ImageSourceLike>;
+export function getImageRequest(arg: any): Promise<ImageSourceLike> {
+	if (_getImage) {
+		return _getImage(arg);
+	}
+	return Promise.reject(new Error('No getImage request handler set.'));
+}
+export function setGetImageRequest(fn: (arg: any) => Promise<ImageSourceLike>) {
+	_getImage = fn;
+}