Function toStableSerializable

packages/db-sqlite-persistence-core/src/persisted.ts:624–697

(value: unknown)

}

function toStableSerializable(value: unknown): unknown {
  if (value == null) {
    return value
  }

  switch (typeof value) {
    case `string`:
    case `number`:
    case `boolean`:
      return value
    case `bigint`:
      return value.toString()
    case `function`:
    case `symbol`:
    case `undefined`:
      return undefined
  }

  if (value instanceof Date) {
    return value.toISOString()
  }

  if (Array.isArray(value)) {
    return value
      .map((entry) => toStableSerializable(entry))
      .filter((entry) => entry !== undefined)
  }

  if (value instanceof Set) {
    return Array.from(value)
      .map((entry) => toStableSerializable(entry))
      .filter((entry) => entry !== undefined)
      .sort((left, right) => {
        const leftSerialized = JSON.stringify(left)
        const rightSerialized = JSON.stringify(right)
        return leftSerialized < rightSerialized
          ? -1
          : leftSerialized > rightSerialized
            ? 1
            : 0
      })
  }

  if (value instanceof Map) {
    return Array.from(value.entries())
      .map(([key, mapValue]) => ({
        key: toStableSerializable(key),
        value: toStableSerializable(mapValue),
      }))
      .filter((entry) => entry.key !== undefined && entry.value !== undefined)
      .sort((left, right) => {
        const leftSerialized = JSON.stringify(left.key)
        const rightSerialized = JSON.stringify(right.key)
        return leftSerialized < rightSerialized
          ? -1
          : leftSerialized > rightSerialized
            ? 1
            : 0