bogui/lib/riverpods/openai.dart

import 'package:flutter/material.dart';
import 'package:flutter_riverpod/flutter_riverpod.dart';
import 'package:openai_gpt3_api/openai_gpt3_api.dart';

class OpenAI extends GPT3 {
  OpenAI() : super(String.fromEnvironment('OPENAPI_SECRET_KEY'));
  // final prompt = TextEditingController();
  final prompt =
      StateProvider<TextEditingController>((ref) => TextEditingController());
  final isLoading = StateProvider<bool>((ref) => false);
  final temperature = StateProvider<double>((ref) => 0.7);

  Future<String> completionEasy(WidgetRef ref) async {
    if (ref.read(isLoading) || ref.read(prompt).text.length < 2) return '';
    ref.read(isLoading.notifier).state = true;
    final anwser = await OpenAI().completion(ref.read(prompt).text,
        maxTokens: 250,
        engine: Engine.davinci3,
        temperature: ref.read(temperature),
        echo: false,
        stream: false);

    String anwserString = '';
    for (final choice in anwser.choices) {
      anwserString += choice.text;
    }

    ref.read(prompt).text += anwserString;
    ref.read(isLoading.notifier).state = false;
    ref.read(prompt).selection = TextSelection.fromPosition(
        TextPosition(offset: ref.read(prompt).text.length));
    return anwserString;
  }
}

double truncateDouble(double val, int decimals) {
  String valString = val.toString();
  int dotIndex = valString.indexOf('.');

  // not enough decimals
  int totalDecimals = valString.length - dotIndex - 1;
  if (totalDecimals < decimals) {
    decimals = totalDecimals;
  }

  valString = valString.substring(0, dotIndex + decimals + 1);

  return double.parse(valString);
}