Class: Tr8n::Api::Client

Inherits:
Base
  • Object
show all
Defined in:
lib/tr8n/api/client.rb

Direct Known Subclasses

PostOffice

Constant Summary collapse

API_HOST = 
'https://api.translationexchange.com'
API_PATH = 
'/v1'

Instance Attribute Summary

Attributes inherited from Base

#attributes

Class Method Summary collapse

Instance Method Summary collapse

Methods inherited from Base

attributes, belongs_to, has_many, #hash_value, hash_value, #initialize, #method_missing, #to_hash, #update_attributes

Constructor Details

This class inherits a constructor from Tr8n::Base

Dynamic Method Handling

This class handles dynamic methods through the method_missing method in the class Tr8n::Base

Class Method Details

.error?(data) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/tr8n/api/client.rb', line 77

def self.error?(data)
  not data['error'].nil?
end

Instance Method Details

#access_token ⇒ Object 



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# File 'lib/tr8n/api/client.rb', line 41

def access_token
  return Tr8n::Session.access_token if Tr8n::Session.access_token

  application.access_token ||= begin
    token = Tr8n.cache.fetch("#{application.key}/access_token") do
      api('oauth/token', {
        :client_id      => application.key,
        :client_secret  => application.secret,
        :grant_type     => :client_credentials
      }, {:method => :post})
    end
    Tr8n::Session.access_token = token['access_token']
    Tr8n::Session.access_token
  end
end

#api(path, params = {}, opts = {}) ⇒ Object 



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# File 'lib/tr8n/api/client.rb', line 93

def api(path, params = {}, opts = {})
  if Tr8n.session.inline_mode?
    return process_response(execute_request(path, params, opts), opts)
  end

  if opts[:method] == :get and opts[:cache_key]
    data = Tr8n.cache.fetch(opts[:cache_key]) do
      Tr8n.cache.read_only? ? {} : execute_request(path, params, opts)
    end
    process_response(data, opts)
  else
    process_response(execute_request(path, params, opts), opts)
  end
end

#connection ⇒ Object 



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# File 'lib/tr8n/api/client.rb', line 85

def connection
  @connection ||= Faraday.new(:url => host) do |faraday|
    faraday.request(:url_encoded)               # form-encode POST params
    # faraday.response :logger                  # log requests to STDOUT
    faraday.adapter(Faraday.default_adapter)    # make requests with Net::HTTP
  end
end

#delete(path, params = {}, opts = {}) ⇒ Object 



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# File 'lib/tr8n/api/client.rb', line 73

def delete(path, params = {}, opts = {})
  api(path, params, opts.merge(:method => :delete))
end

#execute_request(path, params = {}, opts = {}) ⇒ Object

Raises:



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# File 'lib/tr8n/api/client.rb', line 134

def execute_request(path, params = {}, opts = {})
  response = nil
  error = nil

  # oauth path is separate from versioned APIs
  path = prepare_api_path(path)
  params = params.merge(:access_token => access_token) unless path.index('oauth')

  if opts[:method] == :post
    params = params.merge(:api_key => application.key)
  end

  Tr8n.logger.trace_api_call(path, params, opts) do
    begin
      if opts[:method] == :post
        response = connection.post(path, params)
      elsif opts[:method] == :put
        response = connection.put(path, params)
      elsif opts[:method] == :delete
        response = connection.delete(path, params)
      else
        response = connection.get(path, params)
      end
    rescue Exception => ex
      Tr8n.logger.error("Failed to execute request: #{ex.message[0..255]}")
      error = ex
      nil
    end
  end
  raise Tr8n::Exception.new("Error: #{error}") if error

  if response.status >= 500 and response.status < 600
    raise Tr8n::Exception.new("Error: #{response.body}")
  end

  return if response.body.nil? or response.body == ''

  begin
    data = JSON.parse(response.body)
  rescue Exception => ex
    raise Tr8n::Exception.new("Failed to parse response: #{ex.message[0..255]}")
  end

  if data.is_a?(Hash) and not data['error'].nil?
    raise Tr8n::Exception.new("Error: #{data['error']}")
  end

  data
end

#get(path, params = {}, opts = {}) ⇒ Object 



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# File 'lib/tr8n/api/client.rb', line 61

def get(path, params = {}, opts = {})
  api(path, params, opts.merge(:method => :get))
end

#host ⇒ Object 



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# File 'lib/tr8n/api/client.rb', line 81

def host
  application.host || API_HOST
end

#object_class(opts) ⇒ Object 



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# File 'lib/tr8n/api/client.rb', line 184

def object_class(opts)
  return unless opts[:class]
  opts[:class].is_a?(String) ? opts[:class].constantize : opts[:class]
end

#paginate(path, params = {}, opts = {}) ⇒ Object 



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# File 'lib/tr8n/api/client.rb', line 108

def paginate(path, params = {}, opts = {})
  data = get(path, params, opts.merge({'raw' => true}))

  while data
    if data['results'].is_a?(Array)
      data['results'].each do |result|
        yield(result)
      end
    else
      yield(data['results'])
    end

    if data['pagination'] and data['pagination']['links']['next']
      data = get(data['pagination']['links']['next'], {}, opts.merge({'raw' => true}))
    else
      data = nil
    end
  end
end

#post(path, params = {}, opts = {}) ⇒ Object 



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# File 'lib/tr8n/api/client.rb', line 65

def post(path, params = {}, opts = {})
  api(path, params, opts.merge(:method => :post))
end

#prepare_api_path(path) ⇒ Object 



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# File 'lib/tr8n/api/client.rb', line 128

def prepare_api_path(path)
  return path if path.index('oauth')
  return path if path.match(/^https?:\/\//)
  "#{API_PATH}#{path[0] == '/' ? '' : '/'}#{path}"
end

#process_response(data, opts) ⇒ Object 



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# File 'lib/tr8n/api/client.rb', line 189

def process_response(data, opts)
  return data if opts['raw']

  if data.is_a?(Hash) and data['results']
    #Tr8n.logger.debug("received #{data['results'].size} result(s)")
    return data['results'] unless object_class(opts)
    objects = []
    data['results'].each do |data|
      objects << object_class(opts).new(data.merge(opts[:attributes] || {}))
    end
    return objects
  end

  return data unless object_class(opts)
  object_class(opts).new(data.merge(opts[:attributes] || {}))
end

#put(path, params = {}, opts = {}) ⇒ Object 



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# File 'lib/tr8n/api/client.rb', line 69

def put(path, params = {}, opts = {})
  api(path, params, opts.merge(:method => :put))
end

#results(path, params = {}, opts = {}) ⇒ Object 



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# File 'lib/tr8n/api/client.rb', line 57

def results(path, params = {}, opts = {})
  get(path, params, opts)['results']
end