Function collectReachableDefinitionNames

scripts/codegen/utils.ts:1283–1322

(
    schema: Record<string, unknown>,
    rootDefinitionNames: Iterable<string> = ["SessionEvent"]
)

}

export function collectReachableDefinitionNames(
    schema: Record<string, unknown>,
    rootDefinitionNames: Iterable<string> = ["SessionEvent"]
): Set<string> {
    const definitions = collectDefinitions(schema);
    const reachable = new Set<string>();
    const visiting = new Set<string>();

    const visitDefinition = (name: string): void => {
        if (reachable.has(name) || visiting.has(name)) return;
        const definition = definitions[name];
        if (definition === undefined) return;

        visiting.add(name);
        reachable.add(name);
        visitSchema(definition);
        visiting.delete(name);
    };

    const visitSchema = (value: unknown): void => {
        if (!value || typeof value !== "object") return;
        if (Array.isArray(value)) {
            for (const item of value) visitSchema(item);
            return;
        }

        const record = value as Record<string, unknown>;
        if (typeof record.$ref === "string") {
            const localRef = parseLocalDefinitionRef(record.$ref);
            if (localRef) visitDefinition(localRef);
        }
        for (const child of Object.values(record)) visitSchema(child);
    };

    for (const rootName of rootDefinitionNames) {
        visitDefinition(rootName);
    }

    return reachable;
}

export function collectSchemaReferencedDefinitionNames(
    schemas: Iterable<JSONSchema7 | null | undefined>,