From ab9fd65a193c1fe34baa95f49f9b66f792dd90eb Mon Sep 17 00:00:00 2001
From: Oleksii Kriuchykhin <okriuchykhin@biosistemika.com>
Date: Fri, 12 Mar 2021 10:53:10 +0100
Subject: [PATCH] Add basic API client for BMT [SCI-5531]

---
 app/services/biomolecule_toolkit_client.rb    | 67 +++++++++++++++++++
 .../biomolecule_toolkit_client.rb             |  4 ++
 .../locales/biomolecule_toolkit_client/en.yml |  4 ++
 3 files changed, 75 insertions(+)
 create mode 100644 app/services/biomolecule_toolkit_client.rb
 create mode 100644 config/initializers/biomolecule_toolkit_client.rb
 create mode 100644 config/locales/biomolecule_toolkit_client/en.yml

diff --git a/app/services/biomolecule_toolkit_client.rb b/app/services/biomolecule_toolkit_client.rb
new file mode 100644
index 000000000..c01f1cdc4
--- /dev/null
+++ b/app/services/biomolecule_toolkit_client.rb
@@ -0,0 +1,67 @@
+# frozen_string_literal: true
+
+class BiomoleculeToolkitClient
+  MACROMOLECULES_PATH = '/api/macromolecules'
+
+  class BiomoleculeToolkitClientException < StandardError; end
+
+  def initialize
+    @host = Rails.configuration.x.biomolecule_toolkit_host
+    @http = Net::HTTP.new(
+      Rails.configuration.x.biomolecule_toolkit_host,
+      Rails.application.config.x.biomolecule_toolkit_port
+    )
+  end
+
+  def healthy?
+    request = Net::HTTP::Get.new('/api/health')
+    process_request(request)&.dig('status') == 'UP'
+  end
+
+  def list
+    request = Net::HTTP::Get.new(MACROMOLECULES_PATH)
+    process_request(request)
+  end
+
+  def create(params:)
+    request = Net::HTTP::Post.new(MACROMOLECULES_PATH, 'Content-Type': 'application/json')
+    request.body = params
+    process_request(request)
+  end
+
+  def get(cid:)
+    request = Net::HTTP::Get.new("#{MACROMOLECULES_PATH}/#{CGI.escape(cid)}")
+    process_request(request)
+  end
+
+  def update(cid:, params:)
+    request = Net::HTTP::Put.new("#{MACROMOLECULES_PATH}/#{CGI.escape(cid)}", 'Content-Type': 'application/json')
+    request.body = params
+    process_request(request)
+  end
+
+  def delete
+    request = Net::HTTP::Delete.new("#{MACROMOLECULES_PATH}/#{CGI.escape(cid)}")
+    process_request(request)
+  end
+
+  private
+
+  def process_request(request)
+    responce = @http.request(request)
+
+    if responce.is_a? Net::HTTPOK
+      JSON.parse(responce.body)
+    elsif responce.is_a? Net::HTTPNoContent
+      true
+    else
+      error_message = JSON.parse(responce.body).dig('error', 'message')
+      error_message ||= I18n.t('biomolecule_toolkit_client.generic_error')
+      raise BiomoleculeToolkitClientException, error_message
+    end
+  rescue JSON::ParserError
+    raise BiomoleculeToolkitClientException, I18n.t('biomolecule_toolkit_client.responce_parsing_error')
+  rescue StandardError
+    raise BiomoleculeToolkitClientException, I18n.t('biomolecule_toolkit_client.generic_error')
+  end
+end
diff --git a/config/initializers/biomolecule_toolkit_client.rb b/config/initializers/biomolecule_toolkit_client.rb
new file mode 100644
index 000000000..241d21088
--- /dev/null
+++ b/config/initializers/biomolecule_toolkit_client.rb
@@ -0,0 +1,4 @@
+# frozen_string_literal: true
+
+Rails.application.config.x.biomolecule_toolkit_host = ENV['BIOMOLECULE_TOOLKIT_HOST']
+Rails.application.config.x.biomolecule_toolkit_port = ENV['BIOMOLECULE_TOOLKIT_PORT'] || 80
diff --git a/config/locales/biomolecule_toolkit_client/en.yml b/config/locales/biomolecule_toolkit_client/en.yml
new file mode 100644
index 000000000..6739dff13
--- /dev/null
+++ b/config/locales/biomolecule_toolkit_client/en.yml
@@ -0,0 +1,4 @@
+en:
+  biomolecule_toolkit_client:
+    generic_error: 'Failed to execute API command'
+    responce_parsing_error: 'Failed to parse API response'