Function estimateZipSize

website/src/lib/repo-provider.ts:377–410

(
  ref: RepoRef,
  branchesToTry: string[]
)

}

export async function estimateZipSize(
  ref: RepoRef,
  branchesToTry: string[]
): Promise<{ estimatedZipSize: number; isEstimateReliable: boolean }> {
  let estimatedZipSize = 4 * 1024 * 1024;
  let isEstimateReliable = false;

  if (ref.provider !== "github") {
    return { estimatedZipSize, isEstimateReliable };
  }

  for (const branch of branchesToTry) {
    const jsdelivrMetaUrl = getJsdelivrMetaUrl(ref, branch);
    if (!jsdelivrMetaUrl) continue;
    try {
      const metaRes = await fetch(jsdelivrMetaUrl);
      if (metaRes.ok) {
        const metaData = await metaRes.json();
        if (metaData?.files && Array.isArray(metaData.files)) {
          const uncompressedSize = getJsdelivrTotalSize(metaData.files);
          if (uncompressedSize > 0) {
            estimatedZipSize = Math.max(500 * 1024, uncompressedSize * 0.22);
            isEstimateReliable = true;
          }
          break;
        }
      }
    } catch (err) {
      console.warn(`[Explore] Failed jsDelivr metadata fetch for branch ${branch}:`, err);
    }
  }

  return { estimatedZipSize, isEstimateReliable };
}