Function collectGoSharedAnyOfDiscriminatorAliasNames

scripts/codegen/go.ts:3569–3609

* For a shared definition that is an `anyOf` discriminated union with a * string-const discriminator property (e.g. `Attachment` with `type: "file" | * "directory" | ...`), return the synthesized Go discriminator enum name and * per-variant const names that the api/rpc generator emits via * `emi

(
    unionTypeName: string,
    schema: JSONSchema7,
    definitions: Record<string, unknown>
)

 * not match the const-discriminator pattern.
 */
function collectGoSharedAnyOfDiscriminatorAliasNames(
    unionTypeName: string,
    schema: JSONSchema7,
    definitions: Record<string, unknown>
): { enumName: string; constNames: string[] } | undefined {
    const variants = Array.isArray(schema.anyOf) ? schema.anyOf : undefined;
    if (!variants || variants.length === 0) return undefined;

    const resolvedVariants: JSONSchema7[] = [];
    for (const variant of variants) {
        const resolved = resolveSharedAnyOfVariant(variant, definitions);
        if (!resolved || !resolved.properties) return undefined;
        resolvedVariants.push(resolved);
    }

    const firstVariant = resolvedVariants[0];
    for (const [propName, propSchemaRaw] of Object.entries(firstVariant.properties!)) {
        if (typeof propSchemaRaw !== "object" || propSchemaRaw === null) continue;
        const firstPropSchema = propSchemaRaw as JSONSchema7;
        if (typeof firstPropSchema.const !== "string") continue;

        const collectedValues: string[] = [];
        let valid = true;
        for (const variant of resolvedVariants) {
            if (!(variant.required || []).includes(propName)) { valid = false; break; }
            const variantProp = variant.properties?.[propName];
            if (typeof variantProp !== "object" || variantProp === null) { valid = false; break; }
            const variantConst = (variantProp as JSONSchema7).const;
            if (typeof variantConst !== "string") { valid = false; break; }
            collectedValues.push(variantConst);
        }
        if (!valid || collectedValues.length === 0) continue;

        const enumName = `${unionTypeName}${toGoFieldName(propName)}`;
        const constNames = [...new Set(collectedValues)].map(
            (value) => `${enumName}${goEnumConstSuffix(value)}`
        );
        return { enumName, constNames };
    }
    return undefined;
}

function resolveSharedAnyOfVariant(
    variant: JSONSchema7 | boolean,