fix(environments): allow deleting disconnected environments

Signed-off-by: Solaris-star <820622658@qq.com>

src/lib/utils/environment-delete.ts

@@ -0,0 +1,42 @@
+export interface EnvironmentDeleteCounts {
+	stackCount: number;
+	gitStackCount: number;
+	unknown: boolean;
+}
+
+type FetchEnvironmentDeleteCounts = (input: string) => Promise<Response>;
+
+async function readArray(response: Response | null): Promise<{ count: number; unknown: boolean }> {
+	if (!response?.ok) {
+		return { count: 0, unknown: true };
+	}
+
+	try {
+		const value: unknown = await response.json();
+		return Array.isArray(value)
+			? { count: value.length, unknown: false }
+			: { count: 0, unknown: true };
+	} catch {
+		return { count: 0, unknown: true };
+	}
+}
+
+export async function fetchEnvironmentDeleteCounts(
+	environmentId: number,
+	fetcher: FetchEnvironmentDeleteCounts = fetch
+): Promise<EnvironmentDeleteCounts> {
+	const [stacksResponse, gitStacksResponse] = await Promise.all([
+		fetcher(`/api/stacks?env=${environmentId}`).catch(() => null),
+		fetcher(`/api/git/stacks?env=${environmentId}`).catch(() => null)
+	]);
+	const [stacks, gitStacks] = await Promise.all([
+		readArray(stacksResponse),
+		readArray(gitStacksResponse)
+	]);
+
+	return {
+		stackCount: stacks.count,
+		gitStackCount: gitStacks.count,
+		unknown: stacks.unknown || gitStacks.unknown
+	};
+}