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https://github.com/rubygarage/api_struct

API wrapper builder with response serialization
https://github.com/rubygarage/api_struct

api ruby serialization wrapper

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API wrapper builder with response serialization

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# ApiStruct

**ApiStruct** consists of two main interfaces: `ApiStruct::Client` and `ApiStruct::Entity`. The `ApiStruct::Client` class is aimed at using the same interface for describing requests to different APIs. The `ApiStruct::Entity` enables you to use *ApiStruct* clients in ORM-like style.

[![Gem Version](https://badge.fury.io/rb/api_struct.svg)](https://badge.fury.io/rb/api_struct)
![Maintainability](https://api.codeclimate.com/v1/badges/dc07c83ccbcaaebc6c44/maintainability)
[![CircleCI](https://circleci.com/gh/rubygarage/api_struct/tree/master.svg?style=svg)](https://circleci.com/gh/rubygarage/api_struct/tree/master)

## Installation

Add this line to your application's Gemfile:

```ruby
gem 'api_struct'
```

And then execute:

$ bundle

Or install it yourself as:

$ gem install api_struct

## Usage

Initialize APIs routes:

```ruby
ApiStruct::Settings.configure do |config|
config.endpoints = {
first_api: {
root: 'http://localhost:3000/api/v1',
headers: {
'content-type': 'application/json',
'Authorization': 'Bearer TOKEN'
}
},
second_api: {
root: 'http://localhost:3001/api/v1',
params: { token: 'Default token' }
}
}
end
```

# Client
Endpoint wrapper

```ruby
class PostsClient < ApiStruct::Client
first_api :posts

def show(id)
get(id)
end

def index
get
end

def user_posts(user_id, post_id = nil)
get(post_id, prefix: [:users, user_id])
# alias:
# get(post_id, prefix: '/users/:id', id: user_id)
end

def custom_path(user_id)
get(path: 'users_posts/:user_id', user_id: user_id)
end
end
```

Usage:
```ruby
PostsClient.new.get(1) # -> /posts/1
```
Returns `Result` [monad](https://dry-rb.org/gems/dry-monads/1.0/result/)
```ruby
# => Success({:id=>1, :title=>"Post"})
```

Other methods from sample:
```ruby
post_client = PostsClient.new

post_client.index # -> /posts
post_client.user_posts(1) # -> /users/1/posts
post_client.user_posts(1, 2) # -> /users/1/posts/2
post_client.custom_path(1) # -> /users_posts/1/
```

# Entity
Response serializer

```ruby
class User < ApiStruct::Entity
client_service UsersClient

client_service AuthorsClient, prefix: true, only: :index
# alias:
# client_service AuthorsClient, prefix: :prefix, except: :index

attr_entity :name, :id
end
```

```ruby
class UsersClient < ApiStruct::Client
first_api :users

def show(id)
get(id)
end
end
```

```ruby
class AuthorsClient < ApiStruct::Client
first_api :authors

def index
get
end
end
```

Usage:
```ruby
user = User.show(1)
# => {"id"=>1, "name"=>"John"}
```

Call methods from prefixed clients:
```ruby
users = User.authors_client_index
# or
# users = User.prefix_index
```

Response serializers with related entities:
```ruby
class Network < ApiStruct::Entity
client_service NetworkClient

attr_entity :name, :id
attr_entity :state, &:to_sym

has_entity :super_admin, as: User
end
```

```ruby
class NetworkClient < ApiStruct::Client
first_api :networks

def show(id)
get(id)
end
end
```

Usage:
```ruby
network = Network.show(1)
# => {"id"=>1, "name"=>"Main network", "state"=>"active", "super_admin"=>{"id"=>1, "name"=>"John"}}

network.state
# => :active
```

## Dynamic headers:

```ruby
class Auth
def self.call
# Get a token..
end
end
```

```ruby
class AuthHeaderValue
def self.call
{ "Authorization": "Bearer #{Auth.call}" }
end
end
```

```ruby
class PostClient < ApiStruct::Client
first_api :posts

def update(id, post_data)
put(id, json: post_data, headers: AuthHeaderValue.call)
end
end
```

## Contributing

Bug reports and pull requests are welcome on GitHub at https://github.com/rubygarage/api_struct.

## License

The gem is available as open source under the terms of the [MIT License](https://opensource.org/licenses/MIT).
***
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