npm package discovery and stats viewer.

Discover Tips

  • General search

    [free text search, go nuts!]

  • Package details

    pkg:[package-name]

  • User packages

    @[username]

Sponsor

Optimize Toolset

I’ve always been into building performant and accessible sites, but lately I’ve been taking it extremely seriously. So much so that I’ve been building a tool to help me optimize and monitor the sites that I build to make sure that I’m making an attempt to offer the best experience to those who visit them. If you’re into performant, accessible and SEO friendly sites, you might like it too! You can check it out at Optimize Toolset.

About

Hi, 👋, I’m Ryan Hefner  and I built this site for me, and you! The goal of this site was to provide an easy way for me to check the stats on my npm packages, both for prioritizing issues and updates, and to give me a little kick in the pants to keep up on stuff.

As I was building it, I realized that I was actually using the tool to build the tool, and figured I might as well put this out there and hopefully others will find it to be a fast and useful way to search and browse npm packages as I have.

If you’re interested in other things I’m working on, follow me on Twitter or check out the open source projects I’ve been publishing on GitHub.

I am also working on a Twitter bot for this site to tweet the most popular, newest, random packages from npm. Please follow that account now and it will start sending out packages soon–ish.

Open Software & Tools

This site wouldn’t be possible without the immense generosity and tireless efforts from the people who make contributions to the world and share their work via open source initiatives. Thank you 🙏

© 2024 – Pkg Stats / Ryan Hefner

graph-schema-json-writer

v1.2.8

Published

Write JSON/Object GraphQL schema to GraphQL Type Definition strings or TypeScript source files

Downloads

4

Readme

GraphQL schema JSON Writer

Extension to graphSchemaToJson to write the schema generated from a GraphQL type def to various outputs:

  • Typescript source files
  • GraphQL type def files

Also includes accessor functionality to better work with the schema object generated.

Usage

{
  Person: {
    fields: {
      name: {
        type: 'String',
        directives: {},
        isNullable: false,
        isList: false
      },
      age: {
        type: 'Int',
        directives: {
          range: {
            min: 0,
            max: 130
          }
        },
        isNullable: false,
        isList: false
      },
      gender: {
        type: 'Gender',
        directives: {},
        isNullable: false,
        isList: false
      }
    },
    directives: {},
    type: 'Object',
    implements: []
  },
  Gender: {
    fields: ['male', 'female'],
    directives: {},
    type: 'Enum'
  }
}

Accessor

import { schemaToJS } from "../src/schema";
import { accessor } from "graph-schema-json-writer";
const { schemaByType, filteredSchema } = accessor;
/// ... generate JSON schema
const jsSchema = schemaToJS(schema);

// schema where all entries with keys starting with __ are filtered out
const filteredMap = filteredSchema(jsSchema);

// soreted by type
const typeMap = schemaByType(jsSchema);
console.log(typeMap);
{
    Object: {
        Person: {
            // ....
        }
    },
    Enum: {
        Gender: {
            // ...
        }
    }
}

Writer

import { schemaToJS } from "../src/schema";
import { writer } from "graph-schema-json-writer";
const { writeToTypeDef } = writer;
/// ... generate JSON schema
const jsSchema = schemaToJS(schema);

// schema where all entries with keys starting with __ are filtered out
const typeDef = writeToTypeDef(jsSchema);
console.log(typeDef);

Should output the (original) GraphqL type def, nicely formatted:

type Person {
  name: String!
  age: Int! @range(min: 0, max: 130)
  gender: Gender!
}

enum Gender {
  male
  female
}

Writing typescript source files

The writer also supports writing a TypeScript class, complete with:

  • extends class
  • implements interfaces
  • decorators for class itself and fields and properties
    • imports for the decorators, interfaces and class extended
import { schemaToJS } from "../src/schema";
import { writer, createClass } from "graph-schema-json-writer";
/// ... generate JSON schema
const jsSchema = schemaToJS(schema);
const classType = createClass(jsSchema);

const importsMap = {
  Range: "class-validator",
  BaseEntity: "typeorm",
  Entity: "typeorm"
};
const body = classType.writeClass("Person", jsSchema.Person, {
  importsMap
});
console.log(sourceFileTxt);

Output a TypeScript class with decorators

import { BaseEntity, Entity } from 'typeorm';
import { Range } from 'class-validator';

@Entity()
class Person extends BaseEntity {
  name: string

  @Range(min: 0, max: 130)
  age: number
}

Writing source files

Use the SourceFile class to write source files to disk:

import { createSoureFileWriter, importsMap } from "graph-schema-json-writer";

// include typical import maps, such as for typeorm and class-validator
const myImportsMap = {
  ...importsMap.all
  // ...custom additions or overrides
};
const writeOpts = {
  importsMap: myImportsMap,
  srcFileDir: fs.join(__dirname, "db/model"),
  only: ["Person", "Gender"],
  enumRefs: true, // resolve enumRefs using importsMap
  // classRefs true, // resolve classRefs using importsMap
  validate: true // validate that each const reference has an entry in importsMap
};

const srcFileWriter = createSoureFileWriter(writeOpts);
await srcFileWriter.writeTypeDefs(jsSchema, writeOpts);
await srcFileWriter.writeIndexFiles();

Files written, assuming __dirname is /src, using default flat strategy:

  /src
    /db
      /models
        Person.ts
        Gender.ts
        index.ts

Using defaults:

import { writeTypeDefs, importsMap } from "graph-schema-json-writer";
// ...
await writeTypeDefs(jsSchema, {
  importsMap: importsMap.all,
  srcFileDir: fs.join(__dirname, "db/model"),
  strategy: "type-folder",
  only: ["Person", "Gender"],
  index: true // also add index files
});

Files written using type-folder strategy:

  /src
    /db
      /models
        /class
          Person.ts
          index.ts
        /enum/
          Gender.ts
          index.ts
        index.ts

Note: The SourceFileWriter has not yet been fully tested and could use some futher refactoring. It should include enough building blocks for you to compose a solution to fit your needs ;)

Imports map

Imports maps now have support for aliases

importsMap = {
  range: { name: "Range", importPath: "validator" }
};

Will result in an aliased import:

import { Range as range } from 'validator';

Use cases

This class writer could be used for writing classed for TypeORM, NestJS or TypeGraphQL etc.

Note that the class writer supports passing decorators in place of directives.

License

MIT