amplience-graphql-codegen-json

amplience-graphql-codegen-json

This is a plugin for GraphQL codegen that generates Amplience JSON schemas from your Graphql schema.

This plugin will look for Graphql types within your schema that contain an @amplienceContentType directive and generate a JSON schema file for each type.

For more information on the Amplience JSON schemas see the documentation on amplience.com.

A basic example

overwrite: true
hooks:
  afterAllFileWrite:
    - prettier --write
schema: ./schema.graphql
generates:
  terraform/amplience_content_types.tf:
    preset: amplience-graphql-codegen-json
    plugins:
      - amplience-graphql-codegen-json
    config:
      hostname: https://schema-examples.com

The hostname is optional and will default to https://schema-examples.com.

type MyContentType @amplienceContentType {
  """
  This a description for the "name" property.
  """
  name: String
  age: Int!
}

This will generate 1 json schema file named terraform/schemas/my-content-type.json describing the content type with 2 properties of which age is required.

Fields

Besides primitive types, lists and enums, you can also use your custom types. These custom types will be generated as inline types by default. To create content links, use the @link directive as shown below. Alternatively, to create content references, use the @reference directive as shown below. Please keep in mind that linked or referenced types also need an @amplienceContentType directive, otherwise the linked field will link to a nonexisting content type.

Union types are always linked so no @link directive is necessary.

Special Amplience Scalars

This plugin adds 2 basic Amplience Scalars that you can use:

• AmplienceImage
• AmplienceVideo

type MyContentType @amplienceContentType {
  image: AmplienceImage!
  video: AmplienceVideo!
}

Field directives

To further enhance the properties in the JSON schemas, you can add directives to the fields.

@amplienceText

Only works on String types.

type MyContentType @amplienceContentType {
  description: String!
    @amplienceText(
      minLength: 2
      maxLength: 4
      format: markdown
      examples: ["fireman", "musician"]
    )
}

@amplienceNumber

Only works on Int and Float types.

type MyContentType @amplienceContentType {
  rating: Int! @amplienceNumber(minimum: 0, maximum: 10)
}

@amplienceList

Only works on list types.

type MyContentType @amplienceContentType {
  name: [String!] @amplienceList(minItems: 1, maxItems: 10)
}

@amplienceLocalized

Works on String, Int, Float, Boolean, AmplienceImage, and AmplienceVideo.

type MyContentType @amplienceContentType {
  name: String! @amplienceLocalized
}

@amplienceLink

Only works on custom types.

type MyContentType @amplienceContentType {
  other: OtherContentType @amplienceLink
}

type OtherContentType @amplienceContentType {
  name: String!
}

@amplienceReference

Only works on custom types.

type MyContentType @amplienceContentType {
  other: OtherContentType @amplienceReference
}

type OtherContentType @amplienceContentType {
  name: String!
}

@amplienceConst

Only works on String! and [String!]! types.

Note that for a string list, you should use the items argument, whereas for a regular string, you should use the item argument.

type MyContentType @amplienceContentType {
  constString: String @amplienceConst(item: "const")
  constArray: [String!]! @amplienceConst(items: ["this", "is", "const"])
}