feat: fetch line email

lib/omniauth/strategies/line.rb

@@ -25,10 +25,21 @@ def callback_phase
         {
           name:        raw_info['displayName'],
           image:       raw_info['pictureUrl'],
-          description: raw_info['statusMessage']
+          description: raw_info['statusMessage'],
+          email:       raw_info["email"]
         }
       end
 
+      def email
+        params = {
+          id_token: @id_token,
+          client_id: client.id
+        }
+
+        response = Net::HTTP.post_form(URI("https://api.line.me/oauth2/v2.1/verify"), params)
+        JSON.load(response.body)["email"]
+      end
+
       extra do
         hash = {}
         hash[:id_token] = access_token['id_token'] if access_token['id_token'].present?
@@ -38,11 +49,24 @@ def callback_phase
 
       # Require: Access token with PROFILE permission issued.
       def raw_info
-        @raw_info ||= JSON.load(access_token.get('v2/profile').body)
+        return @raw_info if @raw_info.present?
+
+        @raw_info = JSON.load(access_token.get('v2/profile').body)
+        @raw_info["email"] = email
+        @raw_info
       rescue ::Errno::ETIMEDOUT
         raise ::Timeout::Error
       end
-
+
+      def build_access_token
+        verifier = request.params["code"]
+        get_token_params = {:redirect_uri => callback_url}.merge(token_params.to_hash(:symbolize_keys => true))
+        result = client.auth_code.get_token(verifier, get_token_params, deep_symbolize(options.auth_token_params))
+        @id_token = result.params["id_token"]
+
+        return result
+      end
+
       def callback_url
         full_host + script_name + callback_path
       end