OpenAI: added moderation

app/src/main/java/eu/faircode/email/OpenAI.java

@@ -36,6 +36,10 @@ import java.io.IOException;
 import java.io.InputStream;
 import java.net.HttpURLConnection;
 import java.net.URL;
+import java.util.ArrayList;
+import java.util.Date;
+import java.util.Iterator;
+import java.util.List;
 
 public class OpenAI {
     static final String URI_ENDPOINT = "https://api.openai.com/";
@@ -82,12 +86,39 @@ public class OpenAI {
                 grants.getDouble("total_granted"));
     }
 
+    static void checkModeration(Context context, String text) throws JSONException, IOException {
+        // https://platform.openai.com/docs/api-reference/moderations/create
+        JSONObject jrequest = new JSONObject();
+        jrequest.put("input", text);
+        JSONObject jresponse = call(context, "POST", "v1/moderations", jrequest);
+        JSONArray jresults = jresponse.getJSONArray("results");
+        for (int i = 0; i < jresults.length(); i++) {
+            JSONObject jresult = jresults.getJSONObject(i);
+            if (jresult.getBoolean("flagged")) {
+                List<String> violations = new ArrayList<>();
+                JSONObject jcategories = jresult.getJSONObject("categories");
+                JSONObject jcategory_scores = jresult.getJSONObject("category_scores");
+                Iterator<String> keys = jcategories.keys();
+                while (keys.hasNext()) {
+                    String key = keys.next();
+                    Object value = jcategories.get(key);
+                    if (Boolean.TRUE.equals(value)) {
+                        Double score = (jcategories.has(key) ? jcategory_scores.getDouble(key) : null);
+                        violations.add(key + (score == null ? "" : ":" + Math.round(score * 100) + "%"));
+                    }
+                }
+                throw new IllegalArgumentException(TextUtils.join(", ", violations));
+            }
+        }
+    }
+
     static Message[] completeChat(Context context, String model, Message[] messages, Float temperature, int n) throws JSONException, IOException {
         // https://platform.openai.com/docs/guides/chat/introduction
         // https://platform.openai.com/docs/api-reference/chat/create
 
         JSONArray jmessages = new JSONArray();
         for (Message message : messages) {
+            checkModeration(context, message.content);
             JSONObject jmessage = new JSONObject();
             jmessage.put("role", message.role);
             jmessage.put("content", message.content);
@@ -121,6 +152,8 @@ public class OpenAI {
         Uri uri = Uri.parse(URI_ENDPOINT).buildUpon().appendEncodedPath(path).build();
         Log.i("OpenAI uri=" + uri);
 
+        long start = new Date().getTime();
+
         URL url = new URL(uri.toString());
         HttpURLConnection connection = (HttpURLConnection) url.openConnection();
         connection.setRequestMethod(method);
@@ -161,6 +194,8 @@ public class OpenAI {
             return new JSONObject(response);
         } finally {
             connection.disconnect();
+            long elapsed = new Date().getTime() - start;
+            Log.i("OpenAI elapsed=" + (elapsed / 1000f));
         }
     }