Work on translate

src/libse/AutoTranslate/ChatGptTranslate.cs

@@ -0,0 +1,164 @@
+using Nikse.SubtitleEdit.Core.Common;
+using Nikse.SubtitleEdit.Core.SubtitleFormats;
+using Nikse.SubtitleEdit.Core.Translate;
+using System;
+using System.Collections.Generic;
+using System.Net.Http;
+using System.Net.Http.Headers;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Nikse.SubtitleEdit.Core.AutoTranslate
+{
+    public class ChatGptTranslate : IAutoTranslator
+    {
+        private HttpClient _httpClient;
+
+        public static string StaticName { get; set; } = "ChatGPT";
+        public string Name => StaticName;
+        public string Url => "https://chat.openai.com/";
+
+        public void Initialize()
+        {
+            _httpClient?.Dispose();
+            _httpClient = new HttpClient();
+            _httpClient.DefaultRequestHeaders.TryAddWithoutValidation("Content-Type", "application/json");
+            _httpClient.DefaultRequestHeaders.TryAddWithoutValidation("accept", "application/json");
+            _httpClient.BaseAddress = new Uri(Configuration.Settings.Tools.ChatGptUrl);
+            _httpClient.DefaultRequestHeaders.TryAddWithoutValidation("Authorization", "Bearer " + Configuration.Settings.Tools.ChatGptApiKey);
+        }
+
+        public List<TranslationPair> GetSupportedSourceLanguages()
+        {
+            return ListLanguages();
+        }
+
+        public List<TranslationPair> GetSupportedTargetLanguages()
+        {
+            return ListLanguages();
+        }
+
+        public async Task<string> Translate(string text, string sourceLanguageCode, string targetLanguageCode)
+        {
+            var input = "{\"model\": \"gpt-3.5-turbo\",\"messages\": [{ \"role\": \"user\", \"content\": \"Please translate the following text from " + sourceLanguageCode + " to " + targetLanguageCode + ", only write the result: \\n\\n" + Json.EncodeJsonText(text.Trim()) + "\" }]}";
+            var content = new StringContent(input, Encoding.UTF8);
+            content.Headers.ContentType = MediaTypeHeaderValue.Parse("application/json");
+            var result = _httpClient.PostAsync(string.Empty, content).Result;
+            result.EnsureSuccessStatusCode();
+            var bytes = await result.Content.ReadAsByteArrayAsync();
+            var json = Encoding.UTF8.GetString(bytes).Trim();
+
+            var parser = new SeJsonParser();
+            var resultText = parser.GetFirstObject(json, "content");
+            if (resultText == null)
+            {
+                return string.Empty;
+            }
+
+            var outputText = Json.DecodeJsonText(resultText).Trim();
+            if (outputText.StartsWith('"') && outputText.EndsWith('"') && !text.StartsWith('"'))
+            {
+                outputText = outputText.Trim('"').Trim();
+            }
+
+            return outputText;
+        }
+
+        private static List<TranslationPair> ListLanguages()
+        {
+            return new List<TranslationPair>
+            {
+               MakePair("Albanian","sq"),
+               MakePair("Arabic","ar"),
+               MakePair("Armenian","hy"),
+               MakePair("Awadhi","ay"),
+               MakePair("Azerbaijani","az"),
+               MakePair("Bashkir","ba"),
+               MakePair("Basque","eu"),
+               MakePair("Belarusian","be"),
+               MakePair("Bengali","bn"),
+               MakePair("Bhojpuri",""),
+               MakePair("Bosnian","bs"),
+               MakePair("Brazilian Portuguese","br"),
+               MakePair("Bulgarian","bg"),
+               MakePair("Cantonese","zh"),
+               MakePair("Catalan","ca"),
+               MakePair("Chhattisgarhi",""),
+               MakePair("Chinese","zh"),
+               MakePair("Croatian","hr"),
+               MakePair("Czech","cs"),
+               MakePair("Danish","da"),
+               MakePair("Dogri",""),
+               MakePair("Dutch","nl"),
+               MakePair("English","en"),
+               MakePair("Estonian","et"),
+               MakePair("Faroese","fo"),
+               MakePair("Finnish","fi"),
+               MakePair("French","fr"),
+               MakePair("Galician","gl"),
+               MakePair("Georgian","ka"),
+               MakePair("German","de"),
+               MakePair("Greek","el"),
+               MakePair("Gujarati","gu"),
+               MakePair("Haryanvi",""),
+               MakePair("Hindi","hi"),
+               MakePair("Hungarian","hu"),
+               MakePair("Indonesian","id"),
+               MakePair("Irish","ga"),
+               MakePair("Italian","it"),
+               MakePair("Japanese","ja"),
+               MakePair("Javanese","jv"),
+               MakePair("Kannada","kn"),
+               MakePair("Kashmiri","ks"),
+               MakePair("Kazakh","kk"),
+               MakePair("Konkani",""),
+               MakePair("Korean","ko"),
+               MakePair("Kyrgyz","ky"),
+               MakePair("Latvian","lv"),
+               MakePair("Lithuanian","lt"),
+               MakePair("Macedonian","mk"),
+               MakePair("Maithili",""),
+               MakePair("Malay","ms"),
+               MakePair("Maltese","mt"),
+               MakePair("Mandarin","zh"),
+               MakePair("Mandarin Chinese","zh"),
+               MakePair("Marathi","mr"),
+               MakePair("Marwari",""),
+               MakePair("Min Nan",""),
+               MakePair("Moldovan","ro"),
+               MakePair("Mongolian","mn"),
+               MakePair("Montenegrin",""),
+               MakePair("Nepali","ne"),
+               MakePair("Norwegian","no"),
+               MakePair("Oriya","or"),
+               MakePair("Pashto","ps"),
+               MakePair("Persian","fa"),
+               MakePair("Polish","pl"),
+               MakePair("Portuguese","pt"),
+               MakePair("Punjabi","pa"),
+               MakePair("Rajasthani",""),
+               MakePair("Romanian","ro"),
+               MakePair("Russian","ru"),
+               MakePair("Sanskrit","sa"),
+               MakePair("Santali",""),
+               MakePair("Serbian","sr"),
+               MakePair("Sindhi","sd"),
+               MakePair("Sinhala","si"),
+               MakePair("Slovak","sk"),
+               MakePair("Slovene","sl"),
+               MakePair("Slovenian","sl"),
+               MakePair("Ukrainian","uk"),
+               MakePair("Urdu","ur"),
+               MakePair("Uzbek","uz"),
+               MakePair("Vietnamese","vi"),
+               MakePair("Welsh","cy"),
+               MakePair("Wu",""),
+            };
+        }
+
+        private static TranslationPair MakePair(string nameCode, string twoLetter)
+        {
+            return new TranslationPair(nameCode, nameCode, twoLetter);
+        }
+    }
+}

src/libse/Common/Settings.cs

@@ -513,6 +513,7 @@ namespace Nikse.SubtitleEdit.Core.Common
             AutoTranslateLibreUrl = "http://localhost:5000/";
             AutoTranslateSeamlessM4TUrl = "http://localhost:5000/";
             AutoTranslateDeepLUrl = "https://api-free.deepl.com/";
+            ChatGptUrl = "https://api.openai.com/v1/chat/completions";
             TranslateAllowSplit = true;
             TranslateViaCopyPasteAutoCopyToClipboard = true;
             TranslateViaCopyPasteMaxSize = 5000;

src/ui/Forms/Translate/AutoTranslate.cs

@@ -113,6 +113,7 @@ namespace Nikse.SubtitleEdit.Forms.Translate
                 new NoLanguageLeftBehindServe(),
                 new NoLanguageLeftBehindApi(),
                 new MyMemoryApi(),
+                new ChatGptTranslate(),
             };
 
             nikseComboBoxEngine.Items.Clear();
@@ -235,6 +236,17 @@ namespace Nikse.SubtitleEdit.Forms.Translate
                 return;
             }
 
+            if (engineType == typeof(ChatGptTranslate))
+            {
+                labelApiKey.Left = labelUrl.Left;
+                nikseTextBoxApiKey.Text = Configuration.Settings.Tools.ChatGptApiKey;
+                nikseTextBoxApiKey.Left = labelApiKey.Right + 3;
+                labelApiKey.Visible = true;
+                nikseTextBoxApiKey.Visible = true;
+                return;
+            }
+
+
             throw new Exception($"Engine {_autoTranslator.Name} not handled!");
         }
 
@@ -310,6 +322,12 @@ namespace Nikse.SubtitleEdit.Forms.Translate
             var threeLetterLanguageCode = Iso639Dash2LanguageCode.GetThreeLetterCodeFromTwoLetterCode(languageIsoCode);
             foreach (TranslationPair item in comboBox.Items)
             {
+                if (!string.IsNullOrEmpty(item.TwoLetterIsoLanguageName) && item.TwoLetterIsoLanguageName == languageIsoCode)
+                {
+                    comboBox.SelectedIndex = i;
+                    return;
+                }
+
                 if (item.Code.Contains('-'))
                 {
                     var arr = item.Code.ToLowerInvariant().Split('-');
@@ -654,6 +672,11 @@ namespace Nikse.SubtitleEdit.Forms.Translate
             {
                 Configuration.Settings.Tools.AutoTranslateMyMemoryApiKey = nikseTextBoxApiKey.Text.Trim();
             }
+
+            if (engineType == typeof(ChatGptTranslate) && !string.IsNullOrWhiteSpace(nikseTextBoxApiKey.Text))
+            {
+                Configuration.Settings.Tools.ChatGptApiKey = nikseTextBoxApiKey.Text.Trim();
+            }
         }
 
         private static void StartNoLanguageLeftBehindServe()

src/ui/Forms/Translate/MergeAndSplitHelper.cs

@@ -188,6 +188,12 @@ namespace Nikse.SubtitleEdit.Forms.Translate
                 return false;
             }
 
+            var next = subtitle.GetParagraphOrDefault(index + 1);
+            if (next == null || !next.Text.HasSentenceEnding("en"))
+            {
+                return false;
+            }
+
             if (subtitle.Paragraphs[index].Text.EndsWith(".") && Utilities.CountTagInText(subtitle.Paragraphs[index].Text, '.') == 1)
             {
                 c = '.';