serialized

Serialize and deserialize javascript objects into compact, url encoded strings. Useful when you have to store rich objects (such as ElasticSearch queries) in browser url.

Example

// Describe field types
const ProductField = oneOfType([
  constant('id'),
  constant('name'),
  constant('price'),
  constant('category'),
  constant('manufacturer')
])

const PriceRange = mapOf(
  constant('price'),
  objectOf({ gte: numberType(), lte: numberType() })
)

function getType(productField) {
  switch (productField) {
    case 'id': return integerType()
    case 'price': return numberType()
    default: return stringType()
  }
}

const TermOrWildcard = withCalculatedType(
  getType,
  (from, Calculated) => mapOf(from(ProductField), Calculated)
)

const boolType = template(T => oneOfType([
  objectOf({ should: arrayOfType(T), must: arrayOfType(T) }),
  objectOf({ should: arrayOfType(T) }),
  objectOf({ must: arrayOfType(T) })
]))

const Query = oneOfType([
  objectOf({ term: TermOrWildcard }),
  objectOf({ wildcard: TermOrWildcard }),
  objectOf({ range: PriceRange }),
  objectOf({ bool: boolType(() => Query) })
])

const Search = objectOf({
  from: integerType(),
  size: oneOfType([constant(10), constant(100), constant(1000)]),
  query: Query
})

// Complex query
const search = {
  from: 15,
  size: 100,
  query: {
    bool: {
      must: [{
        bool: {
          should: [
            { wildcard: { name: '*tablet*' }},
            { term: { category: 'Electronics/Tablets' }}]}}, {
          bool: {
            should: [{
              bool: {
                must: [
                  { term: { manufacturer: 'Apple' }},
                  { range: { price: { gte: 0, lte: 1000 }}}]}}, {
              bool: {
                must: [
                  { term: { manufacturer: 'Samsung' }},
                  { range: { price: { gte: 0, lte: 500 }}}]}}]}}]}}}

// Serialize object
const serializedString = Search.serialize(search)
//=> f$1323111*tablet*$$03Electronics%2FTablets$$$313204Apple$$20$1000$$$3204Samsung$$20$500

Search.deserialize(serializedString)
//=> equals to 'search'

API

stringType([length])

Simple string. By default serializes strings with encodeURIComponent

• length Accept only strings with provided length

integerType([max])

Positive integer

• max Accept only integers between 0 and max

numberType()

Simple number

constant(value)

• value Any javascript primitive type

objectOf(schema)

• schema Object with token type values

const Person = objectOf({
  name: stringType(),
  age: integerType(),
})

mapOf(keyToken, valueToken)

Javascript object as map

• keyToken Type of map keys
• valueToken Type of map values

oneOfType(tokens)

Union type

• tokens Array of possible types

const OptionalString = oneOfType([
  constant(undefined),
  constant(null),
  stringType(),
])

arrayOfType(token, [length])

• token Type of array item
• length Accept only arrays with provided length

const Matrix = arrayOfType(numberType(), 9)

template(callback)

const nullableType = template(T => oneOfType([
  constant(null),
  T,
]))
const NullableString = nullableType(stringType())

withCalculatedType(getType, callback)

Utility for deferred type calculation