add check endpoint

ai/README.md

@@ -2,4 +2,5 @@ AI as a service
 
 # Ai Service
 
-Provides easy use of OpenAI endpoints for text completion and hate speech moderation
+Provides easy use of OpenAI endpoints for text completion, hate speech moderation, content generation 
+and much more. Limits to 1000 tokens per request.

ai/config/examples.json

@@ -9,6 +9,16 @@
 	  "text": "\n\nLeonardo da Vinci was an Italian Renaissance architect, musician, inventor, engineer, and painter."
         }
     }],
+    "check": [{
+        "title": "Check text",
+        "run_check": false,
+        "request": {
+          "text": "What day of the wek is it?"
+        },
+        "response": {
+          "text": "What is the day of the week?\n"
+	}
+    }],
     "moderate": [{
         "title": "Moderate hate speech",
         "run_check": false,

ai/config/publicapi.json

@@ -5,6 +5,7 @@
   "display_name": "AI",
   "pricing": {
     "Ai.Call": 50000,
+    "Ai.Check": 50000,
     "Ai.Moderate": 50000
   }
 }

ai/handler/ai.go

@@ -69,6 +69,41 @@ func (e *Ai) Call(ctx context.Context, req *pb.CallRequest, rsp *pb.CallResponse
 	return nil
 }
 
+func (e *Ai) Check(ctx context.Context, req *pb.CheckRequest, rsp *pb.CheckResponse) error {
+	if len(req.Text) == 0 {
+		return errors.BadRequest("ai.check", "missing text")
+	}
+
+	uri := "https://api.openai.com/v1/edits"
+
+	if len(req.Instruction) == 0 {
+		req.Instruction = "Check the spelling and grammar"
+	}
+
+	var resp map[string]interface{}
+	if err := api.Post(uri, map[string]interface{}{
+		"model":       "text-davinci-edit-001",
+		"input":       req.Text,
+		"instruction": req.Instruction,
+	}, &resp); err != nil {
+		log.Errorf("Failed AI call: %v\n", err)
+		return errors.InternalServerError("ai.check", "Failed to make request")
+	}
+
+	v := resp["choices"]
+	if v == nil {
+		return nil
+	}
+
+	// get first choice
+	choice := v.([]interface{})[0].(map[string]interface{})
+
+	// set response text
+	rsp.Text = choice["text"].(string)
+
+	return nil
+}
+
 func (e *Ai) Moderate(ctx context.Context, req *pb.ModerateRequest, rsp *pb.ModerateResponse) error {
 	if len(req.Text) == 0 {
 		return errors.BadRequest("ai.moderate", "missing text")