Further cleanup

src/core/sources.ts

@@ -1,6 +1,39 @@
 import { Glob } from "bun";
 import { type LoadedFile, loadFileContent } from "./files";
 import { type UnknownRecord, autoParseEntry } from "./records";
+import { z } from "zod";
+import { MuseError } from "#errors";
+
+export const SourceSchema = z.union([
+  z.object({
+    file: z.string(),
+  }),
+  z.object({
+    url: z.string().url(),
+  }),
+]);
+
+export type SourceShorthand = z.infer<typeof SourceSchema>;
+
+export function sourceShorthandToSource(
+  shorthand: SourceShorthand,
+): MuseSource {
+  if ("file" in shorthand) {
+    return {
+      location: shorthand.file,
+      type: "file",
+    };
+  }
+
+  if ("url" in shorthand) {
+    return {
+      location: shorthand.url,
+      type: "url",
+    };
+  }
+
+  throw new MuseError("Invalid source shorthand");
+}
 
 export type SourceType = "file" | "url";