Extract BaseStore deps into constructor argument

Signed-off-by: Sebastian Malton <sebastian@malton.name>

src/common/utils/type-narrowing.ts

@@ -123,6 +123,10 @@ export function isDefined<T>(val: T | undefined | null): val is T {
   return val != null;
 }
 
+export function isFunction(val: unknown): val is (...args: unknown[]) => unknown {
+  return typeof val === "function";
+}
+
 /**
  * Checks if the value in the second position is non-nullable
  */
@@ -146,6 +150,15 @@ export function hasDefiniteField<Field extends keyof T, T>(field: Field): (val:
   return (val): val is T & { [f in Field]-?: NonNullable<T[Field]> } => val[field] != null;
 }
 
+export function isPromiseLike(res: unknown): res is (Promise<unknown> | { then: () => unknown }) {
+  if (res instanceof Promise) {
+    return true;
+  }
+
+  return isObject(res)
+    && hasTypedProperty(res, "then", isFunction);
+}
+
 export function isPromiseSettledRejected<T>(result: PromiseSettledResult<T>): result is PromiseRejectedResult {
   return result.status === "rejected";
 }