glitr_convert

Encode and decode from and to Gleam types effortlessly !

Define a converter once and encode and decode as much as you want.

Installation

gleam add glitr_convert

Usage

import gleam/io
import gleam/json
import glitr/convert as c
import glitr/convert/json as glitr_json

pub type Person {
  Person(name: String, age: Int)
}

pub fn main() {
  let converter =
    c.object({
      use name <- c.parameter
      use age <- c.parameter
      use <- c.constructor
      Person(name:, age:)
    })
    |> c.field("name", fn(v) { Ok(v.name) }, c.string())
    |> c.field("age", fn(v) { Ok(v.age) }, c.int())
    |> c.to_converter

  Person("Anna", 21)
  |> glitr_json.json_encode(converter)
  |> json.to_string
  |> io.debug
  // '{"name": "Anna", "age": 21}'

  "{\"name\": \"Bob\", \"age\": 36}"
  |> json.decode(glitr_json.json_decode(converter))
  |> io.debug
  // Ok(Person("Bob", 36))
}

Further documentation can be found at https://hexdocs.pm/glitr_convert.

Features

• Javascript and Erlang targets
• Converters for all basic types (except BitArray)
• Define converters for List, Dict, Result & Option
• Build decoders for custom objects and enums
• Encode and decode to JSON.

Potential developments

• Add BitArray support
• Add Tuple support
• Add Yaml conversion

Feel free to open PRs and issues if you want more features !

Development

gleam run   # Run the project
gleam test  # Run the tests