Function toSerializableIndexValue

packages/db/src/collection/indexes.ts:40–129

(
  value: unknown,
)

}

function toSerializableIndexValue(
  value: unknown,
): CollectionIndexSerializableValue | undefined {
  if (value == null) {
    return value
  }

  switch (typeof value) {
    case `string`:
    case `boolean`:
      return value
    case `number`:
      return Number.isFinite(value) ? value : null
    case `bigint`:
      return { __type: `bigint`, value: value.toString() }
    case `function`:
    case `symbol`:
      // Function and symbol identity are process-local and not stable across runtimes.
      // Dropping them keeps signatures deterministic; we may skip index reuse, which is acceptable.
      return undefined
    case `undefined`:
      return undefined
  }

  if (Array.isArray(value)) {
    return value.map((entry) => toSerializableIndexValue(entry) ?? null)
  }

  if (value instanceof Date) {
    return {
      __type: `date`,
      value: value.toISOString(),
    }
  }

  if (value instanceof Set) {
    const serializedValues = Array.from(value)
      .map((entry) => toSerializableIndexValue(entry) ?? null)
      .sort((a, b) =>
        compareStringsCodePoint(
          stableStringifyCollectionIndexValue(a),
          stableStringifyCollectionIndexValue(b),
        ),
      )
    return {
      __type: `set`,
      values: serializedValues,
    }
  }

  if (value instanceof Map) {
    const serializedEntries = Array.from(value.entries())
      .map(([mapKey, mapValue]) => ({
        key: toSerializableIndexValue(mapKey) ?? null,
        value: toSerializableIndexValue(mapValue) ?? null,
      }))
      .sort((a, b) =>
        compareStringsCodePoint(