Feat/open ai gateway

Gemfile

@@ -38,13 +38,17 @@ gem "jsonapi-serializer"
 gem "rolify"
 gem "pundit", "~> 2.4"
 
+gem 'faraday'
+
 group :development, :test do
   # See https://guides.rubyonrails.org/debugging_rails_applications.html#debugging-with-the-debug-gem
   gem "debug", platforms: %i[ mri windows ]
   gem "pry"
   gem "rspec-rails"
   gem "shoulda-matchers"
   gem 'pundit-matchers', '~> 3.1'
+  gem 'webmock'
+  gem "vcr"
 end
 
 group :test do

Gemfile.lock

@@ -78,6 +78,8 @@ GEM
       mutex_m
       securerandom (>= 0.3)
       tzinfo (~> 2.0)
+    addressable (2.8.7)
+      public_suffix (>= 2.0.2, < 7.0)
     base64 (0.2.0)
     bcrypt (3.1.20)
     benchmark (0.3.0)
@@ -88,6 +90,9 @@ GEM
     coderay (1.1.3)
     concurrent-ruby (1.3.4)
     connection_pool (2.4.1)
+    crack (1.0.0)
+      bigdecimal
+      rexml
     crass (1.0.6)
     date (3.4.0)
     debug (1.9.2)
@@ -97,14 +102,22 @@ GEM
     docile (1.4.1)
     drb (2.2.1)
     erubi (1.13.0)
+    faraday (2.12.2)
+      faraday-net_http (>= 2.0, < 3.5)
+      json
+      logger
+    faraday-net_http (3.4.0)
+      net-http (>= 0.5.0)
     globalid (1.2.1)
       activesupport (>= 6.1)
+    hashdiff (1.1.2)
     i18n (1.14.6)
       concurrent-ruby (~> 1.0)
     io-console (0.7.2)
     irb (1.14.1)
       rdoc (>= 4.0.0)
       reline (>= 0.4.2)
+    json (2.10.1)
     jsonapi-serializer (2.2.0)
       activesupport (>= 4.2)
     jwt (2.9.3)
@@ -124,6 +137,8 @@ GEM
     minitest (5.25.1)
     msgpack (1.7.3)
     mutex_m (0.2.0)
+    net-http (0.6.0)
+      uri
     net-imap (0.5.0)
       date
       net-protocol
@@ -152,6 +167,7 @@ GEM
       method_source (~> 1.0)
     psych (5.2.0)
       stringio
+    public_suffix (6.0.1)
     puma (6.4.3)
       nio4r (~> 2.0)
     pundit (2.4.0)
@@ -205,6 +221,7 @@ GEM
       psych (>= 4.0.0)
     reline (0.5.10)
       io-console (~> 0.5)
+    rexml (3.4.1)
     rolify (6.0.1)
     rspec-core (3.13.2)
       rspec-support (~> 3.13.0)
@@ -237,6 +254,13 @@ GEM
     timeout (0.4.2)
     tzinfo (2.0.6)
       concurrent-ruby (~> 1.0)
+    uri (1.0.2)
+    vcr (6.3.1)
+      base64
+    webmock (3.25.0)
+      addressable (>= 2.8.0)
+      crack (>= 0.3.2)
+      hashdiff (>= 0.4.0, < 2.0.0)
     websocket-driver (0.7.6)
       websocket-extensions (>= 0.1.0)
     websocket-extensions (0.1.5)
@@ -254,6 +278,7 @@ DEPENDENCIES
   bcrypt (~> 3.1.7)
   bootsnap
   debug
+  faraday
   jsonapi-serializer
   jwt
   pg (~> 1.1)
@@ -268,6 +293,8 @@ DEPENDENCIES
   shoulda-matchers
   simplecov
   tzinfo-data
+  vcr
+  webmock
 
 RUBY VERSION
    ruby 3.2.2p53

app/gateways/openai_gateway.rb

@@ -0,0 +1,46 @@
+class OpenaiGateway
+
+  def generate_interview_questions(description)
+    prompt = build_prompt(description)
+
+    response = Faraday.post("https://api.openai.com/v1/chat/completions") do |req|
+      req.headers['Content-Type'] = 'application/json'
+      req.headers['Authorization'] = "Bearer #{Rails.application.credentials.dig(:open_ai, :key)}"
+      req.body = {
+        model: "gpt-4o-mini",
+        messages: [{ role: "user", content: prompt }],
+        max_tokens: 300,
+        temperature: 0.7
+      }.to_json
+    end
+
+    if response.status == 200
+      api_response = JSON.parse(response.body, symbolize_names: true)
+      raw_content = api_response.dig(:choices, 0, :message, :content)
+
+      cleaned_content = raw_content.match(/\[.*\]/m)&.to_s if raw_content
+
+      if cleaned_content
+        {
+          success: true,
+          id: api_response[:id],
+          data: JSON.parse(cleaned_content)
+        }
+      else
+        { success: false, error: "Unexpected response format from OpenAI." }
+      end
+    else
+      { success: false, error: "Failed to fetch interview questions." }
+    end
+  rescue => error
+      { success: false, error: "An error occurred: #{error.message}" }
+
+  end
+
+  private 
+
+  def build_prompt(description)
+    "Please generate 10 practice interview questions based on the following job description: #{description}.
+    ONLY return a JSON array of strings containing the questions, with no additional formatting or object keys."
+  end
+end

config/credentials.yml.enc

@@ -1 +1 @@
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