37 lines
1.4 KiB
TypeScript
37 lines
1.4 KiB
TypeScript
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import type {
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AtomId,
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Binding,
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Conformance,
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InterfaceRevisionId,
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OperationBinding,
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OperationId,
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WorkspaceRevision,
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} from "./types.js";
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export type ConcreteBinding = Exclude<Binding, { kind: "interface" }>;
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export type ResolvedBinding = { conformance: Conformance; entry: OperationBinding; binding: ConcreteBinding };
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/** Follow public operations on the same receiver, never private attachment names. */
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export function resolveForwardedBinding(
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workspace: Pick<WorkspaceRevision, "conformances">,
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atomId: AtomId,
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interfaceRevisionId: InterfaceRevisionId,
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operationId: OperationId,
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): ResolvedBinding {
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const visited = new Set<string>();
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for (;;) {
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const key = `${interfaceRevisionId}\0${operationId}`;
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if (visited.has(key)) throw new Error(`Forwarding cycle at ${interfaceRevisionId}/${operationId}`);
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visited.add(key);
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const conformance = workspace.conformances.find(
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(c) => c.atomId === atomId && c.interfaceRevisionId === interfaceRevisionId,
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);
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const entry = conformance?.operationBindings.find((b) => b.operationId === operationId);
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if (!conformance || !entry)
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throw new Error(`Missing forwarding target ${atomId} as ${interfaceRevisionId}/${operationId}`);
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if (entry.binding.kind !== "interface") return { conformance, entry, binding: entry.binding };
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interfaceRevisionId = entry.binding.interfaceRevisionId;
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operationId = entry.binding.operationId;
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}
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}
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