# README

OpenFGA Language - GoLang

GoLang implementation of ANTLR Grammar for the OpenFGA DSL and parser from and to the OpenFGA JSON Syntax

Installation

go get github.com/openfga/language/pkg/go

Usage

Transformer

import "github.com/openfga/language/pkg/go/transformer"

...

dslString := `model
  schema 1.1
type user
type folder
  relations
    define viewer: [user]`

// Transform from DSL syntax to the OpenFGA Authorization Model Protobuf format
generatedProto, err := transformer.TransformDSLToProto(dslString)

// Transform from DSL to a JSON string
generatedJsonString, err := transformer.TransformDSLToJSONString(dslString)

// Transform from a JSON string to DSL
generatedDsl, err := transformer.TransformJSONStringToDSL(generatedJsonString)

Transform Mod to JSON

import "github.com/openfga/language/pkg/go/transformer"

...

modFileContents := `schema: "1.2"
contents:
  - core.fga
  - board.fga
  - wiki.fga`

// Transform from fga.mod to a JSON object for parsing
jsonModFile, err := transformer.TransformModFile(modFileContents)

Transform Modules To Model

import "github.com/openfga/language/pkg/go/transformer"

...

// Transform an array of modules, and their contents, into a singular model
model, err := transformer.TransformModuleFilesToModel([]transformer.ModuleFile{
		{
			Name: "core.fga",
			Contents: `module core
  type user`,
		},
    {
			Name: "board.fga",
			Contents: `module core
  type board`,
		},
    {
			Name: "wiki.fga",
			Contents: `module core
  type wiki`,
		},

	}, "1.2")


jsonString, _ := json.MarshalIndent(model, "", "  ")

/*
{
  "schema_version": "1.2",
  "type_definitions": [
    {
      "type": "user",
      "metadata": {
        "module": "core",
        "source_info": {
          "file": "core.fga"
        }
      }
    },
    {
      "type": "board",
      "metadata": {
        "module": "core",
        "source_info": {
          "file": "board.fga"
        }
      }
    },
    {
      "type": "wiki",
      "metadata": {
        "module": "core",
        "source_info": {
          "file": "wiki.fga"
        }
      }
    }
  ]
}
*/

Validation

Not yet implemented, but the feature is in our issue backlog.