swagger

# Swagger

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Swagger is a low-level library which generates a document compatible with [Swagger / OpenAPI Spec 3.0.3](https://github.com/OAI/OpenAPI-Specification/blob/master/versions/3.0.3.md),
and wrapped many friendly APIs let developer understand and use it easier.

## Installation

```yaml
dependencies:
  swagger:
    github: icyleaf/swagger
```

## Quick look

```crystal
require "swagger"

builder = Swagger::Builder.new(
  title: "App API",
  version: "1.0.0",
  description: "This is a sample api for users",
  terms_url: "http://yourapp.com/terms",
  contact: Swagger::Contact.new("icyleaf", "icyleaf.cn@gmail.com", "http://icyleaf.com"),
  license: Swagger::License.new("MIT", "https://github.com/icyleaf/swagger/blob/master/LICENSE"),
  authorizations: [
    Swagger::Authorization.jwt(description: "Use JWT Auth"),
  ]
)

builder.add(Swagger::Controller.new("Users", "User resources", [
  Swagger::Action.new("get", "/users", description: "All users", responses: [
    Swagger::Response.new("200", "Success response")
  ]),
  Swagger::Action.new("get", "/users/{id}", description: "Get user by id", parameters: [
    Swagger::Parameter.new("id", "path")
  ], responses: [
    Swagger::Response.new("200", "Success response"),
    Swagger::Response.new("404", "Not found user")
  ], authorization: true),
  Swagger::Action.new("post", "/users", description: "Create User", responses: [
    Swagger::Response.new("201", "Return user resource after created"),
    Swagger::Response.new("401", "Unauthorizated")
  ], authorization: false)
]))

document = builder.built
puts document.to_json
```

## Structure

Structure in `src` directory:

```
.
├── xxx.cr                        # Friendly APIs
├── http                          # HTTP assets and libraries
└── objects                       # OpenAPI objects
```

## Running on web

Swagger provids a built-in web server, if you have no idea how to preview it:

###
```crystal
require "swagger"
require "swagger/http/server"

# made your document (See `builder` code example above)
document = builder.built

# Run web server
Swagger::HTTP::Server.run(document)
```

## Integrating

Swagger has two HTTP handlers which you can integrate it to bult-in HTTP Server and mostly frameworks (like kemal, amber, lucky etc):

- Swagger::HTTP::APIHandler
- Swagger::HTTP::WebHandler

## Examples

See more [examples](/examples).

## Todo

- [x] openapi
- [x] Info Object
- [x] Paths Object
  - [x] PathItem Object
    - [x] Parameter Object
    - [x] RequestBody Object
    - [x] Responses Object
    - [x] Security Object
    - [x] Tag Object
- [x] Tags Object
- [x] Servers Objec
  - [x] ServerVariables Object
- [x] Security Object
- [x] Components Object
  - [x] Schemas Object
  - [x] SecuritySchemes Object
    - [x] Basic
    - [x] Bearer (include JWT)
    - [x] APIKey
    - [x] OAuth2
- [x] ExternalDocs Object

## Donate

Swagger is a open source, collaboratively funded project. If you run a business and are using Swagger in a revenue-generating product,
it would make business sense to sponsor Swagger development. Individual users are also welcome to make a one time donation
if Swagger has helped you in your work or personal projects.

You can donate via [Paypal](https://www.paypal.me/icyleaf/5).

## How to Contribute

Your contributions are always welcome! Please submit a pull request or create an issue to add a new question, bug or feature to the list.

Here is a throughput graph of the repository for the last few weeks:

All [Contributors](https://github.com/icyleaf/swagger/graphs/contributors) are on the wall.

## You may also like

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- [poncho](https://github.com/icyleaf/poncho) - A .env parser/loader improved for performance.
- [popcorn](https://github.com/icyleaf/popcorn) - Easy and Safe casting from one type to another.
- [fast-crystal](https://github.com/icyleaf/fast-crystal) - 💨 Writing Fast Crystal 😍 -- Collect Common Crystal idioms.

## License

[MIT License](https://github.com/icyleaf/swagger/blob/master/LICENSE) © icyleaf