[Init] Initial commit - NetMesh terminal manager

domain/sftpDedicatedStreamPolicy.ts

@@ -0,0 +1,71 @@
+/**
+ * Bulk transfers must use dedicated sessions when a remote host is known.
+ * Browse sessions are tied to a page and disappear when its terminal tab closes.
+ */
+export function remoteEndpointRequiresPool(params: {
+  isLocal: boolean;
+  hostId?: string;
+  poolAvailable: boolean;
+}): boolean {
+  return !params.isLocal && !!params.hostId && params.poolAvailable;
+}
+
+export function resolveDedicatedStreamEndpointIds(params: {
+  sourceIsLocal: boolean;
+  targetIsLocal: boolean;
+  sourceHostId?: string;
+  targetHostId?: string;
+  sourcePoolSftpId?: string;
+  targetPoolSftpId?: string;
+  panelSourceSftpId?: string | null;
+  panelTargetSftpId?: string | null;
+  poolAvailable: boolean;
+}): { sourceSftpId?: string; targetSftpId?: string; error?: string } {
+  const needSource = remoteEndpointRequiresPool({
+    isLocal: params.sourceIsLocal,
+    hostId: params.sourceHostId,
+    poolAvailable: params.poolAvailable,
+  });
+  const needTarget = remoteEndpointRequiresPool({
+    isLocal: params.targetIsLocal,
+    hostId: params.targetHostId,
+    poolAvailable: params.poolAvailable,
+  });
+
+  if (needSource && !params.sourcePoolSftpId) {
+    return { error: "Dedicated source transfer session unavailable" };
+  }
+  if (needTarget && !params.targetPoolSftpId) {
+    return { error: "Dedicated target transfer session unavailable" };
+  }
+
+  return {
+    sourceSftpId: params.sourceIsLocal
+      ? undefined
+      : (params.sourcePoolSftpId ?? params.panelSourceSftpId ?? undefined),
+    targetSftpId: params.targetIsLocal
+      ? undefined
+      : (params.targetPoolSftpId ?? params.panelTargetSftpId ?? undefined),
+  };
+}
+
+export function resolveUploadStreamTargetSftpId(params: {
+  requirePool: boolean;
+  poolSftpId?: string | null;
+  prepSftpId?: string | null;
+}): { sftpId?: string; error?: string } {
+  if (params.requirePool) {
+    if (params.poolSftpId) return { sftpId: params.poolSftpId };
+    return { error: "Dedicated transfer session unavailable" };
+  }
+  return { sftpId: params.prepSftpId ?? undefined };
+}
+
+export function compressedUploadRequiresDedicatedSession(params: {
+  enabled: boolean;
+  hasDirectory: boolean;
+  isLocal: boolean;
+  hostId?: string;
+}): boolean {
+  return params.enabled && params.hasDirectory && !params.isLocal && !!params.hostId;
+}