add experimental deepl support

CMakeLists.txt

@@ -33,6 +33,7 @@ set(DTRANSLATEBOT_HEADERS
     src/core/translator.h
     src/core/webhook_push.h
     src/database/file/file.h
+    src/translator/deepl/deepl.h
     src/translator/libretranslate/libretranslate.h
     src/translator/stub/stub.h
 )
@@ -46,6 +47,7 @@ set(DTRANSLATEBOT_SOURCES
     src/core/translator.cpp
     src/core/webhook_push.cpp
     src/database/file/file.cpp
+    src/translator/deepl/deepl.cpp
     src/translator/libretranslate/libretranslate.cpp
     src/translator/stub/stub.cpp
 )

src/core/settings.cpp

@@ -21,6 +21,7 @@
 #include <iostream>
 #include "settings.h"
 #include "../database/file/file.h"
+#include "../translator/deepl/deepl.h"
 #include "../translator/libretranslate/libretranslate.h"
 #include "../translator/stub/stub.h"
 using namespace bot::settings;
@@ -233,7 +234,23 @@ bool process_translator_settings(const dpp::json &json, translator &translator)
         std::transform(translator_type.begin(), translator_type.end(), translator_type.begin(), ::tolower);
     }
 
-    if (translator_type == "libretranslate") {
+    if (translator_type == "deepl") {
+        translator.type = TRANSLATOR_DEEPL;
+
+        auto json_deepl_hostname = json.find("hostname");
+        if (json_deepl_hostname != json.end())
+            translator.hostname = *json_deepl_hostname;
+        else
+            translator.hostname = "api-free.deepl.com";
+
+        auto json_deepl_apiKey = json.find("apiKey");
+        if (json_deepl_apiKey == json.end()) {
+            std::cerr << "[Error] DeepL requires API key for authorization" << std::endl;
+            return false;
+        }
+        translator.apiKey = *json_deepl_apiKey;
+    }
+    else if (translator_type == "libretranslate") {
         translator.type = TRANSLATOR_LIBRETRANSLATE;
 
         auto json_lt_hostname = json.find("hostname");
@@ -459,6 +476,8 @@ std::unique_ptr<bot::translator::translator> settings::get_translator() const
     const std::lock_guard<std::recursive_mutex> guard(m_mutex);
 
     switch (m_translator.type) {
+    case TRANSLATOR_DEEPL:
+        return std::make_unique<bot::translator::deepl>(m_translator.hostname, m_translator.apiKey);
     case TRANSLATOR_LIBRETRANSLATE:
         return std::make_unique<bot::translator::libretranslate>(m_translator.hostname, m_translator.port, m_translator.url, m_translator.tls, m_translator.apiKey);
     case TRANSLATOR_STUB:

src/core/settings_types.h

@@ -41,6 +41,7 @@ namespace bot {
             std::vector<bot::settings::channel> channel;
         };
         enum translator_type {
+            TRANSLATOR_DEEPL,
             TRANSLATOR_LIBRETRANSLATE,
             TRANSLATOR_STUB
         };

src/core/slashcommands.cpp

@@ -434,9 +434,9 @@ void slashcommands::register_commands(dpp::cluster *bot, bot::settings::settings
     std::vector<dpp::slashcommand> commands;
 
     dpp::command_option source_option(dpp::co_string, "source", "Source language (ISO 639-1)", true);
-    source_option.set_max_length(static_cast<int64_t>(2)).set_min_length(static_cast<int64_t>(2));
+    source_option.set_max_length(static_cast<int64_t>(5)).set_min_length(static_cast<int64_t>(2));
     dpp::command_option target_option(dpp::co_string, "target", "Target language (ISO 639-1)", true);
-    target_option.set_max_length(static_cast<int64_t>(2)).set_min_length(static_cast<int64_t>(2));
+    target_option.set_max_length(static_cast<int64_t>(5)).set_min_length(static_cast<int64_t>(2));
 
     dpp::slashcommand command_edit("edit", "Edit current channel settings", bot->me.id);
     command_edit.set_default_permissions(dpp::p_manage_webhooks);

src/translator/deepl/deepl.cpp

@@ -0,0 +1,104 @@
+/*****************************************************************************
+* dtranslatebot Discord Translate Bot
+* Copyright (C) 2024 Syping
+*
+* Redistribution and use in source and binary forms, with or without modification,
+* are permitted provided that the following conditions are met:
+*
+* 1. Redistributions of source code must retain the above copyright notice,
+* this list of conditions and the following disclaimer.
+*
+* 2. Redistributions in binary form must reproduce the above copyright notice,
+* this list of conditions and the following disclaimer in the documentation
+* and/or other materials provided with the distribution.
+*
+* This software is provided as-is, no warranties are given to you, we are not
+* responsible for anything with use of the software, you are self responsible.
+*****************************************************************************/
+
+#include <dpp/json.h>
+#include <dpp/httpsclient.h>
+#include "deepl.h"
+using namespace bot::translator;
+using namespace std::string_literals;
+
+deepl::deepl(const std::string &hostname, const std::string apiKey) :
+    m_hostname(hostname), m_apiKey(apiKey)
+{
+}
+
+deepl::~deepl()
+{
+}
+
+const std::vector<language> deepl::get_languages()
+{
+    std::vector<language> languages;
+
+    try {
+        dpp::https_client http_request(m_hostname, 443, "/v2/languages?type=target", "GET", {}, { {"Authorization"s, "DeepL-Auth-Key " + m_apiKey} }, false);
+        if (http_request.get_status() == 200) {
+            const dpp::json response = dpp::json::parse(http_request.get_content());
+            if (response.is_array()) {
+                for (const auto &json_language : response) {
+                    if (json_language.is_object()) {
+                        language language;
+
+                        auto json_lang_code = json_language.find("language");
+                        if (json_lang_code != json_language.end())
+                            language.code = *json_lang_code;
+
+                        std::transform(language.code.begin(), language.code.end(), language.code.begin(), ::tolower);
+
+                        auto json_lang_name = json_language.find("name");
+                        if (json_lang_name != json_language.end())
+                            language.name = *json_lang_name;
+
+                        if (!language.code.empty() && !language.name.empty())
+                            languages.push_back(std::move(language));
+                    }
+                }
+            }
+        }
+    }
+    catch (const std::exception &exception) {
+        std::cerr << "[Exception] " << exception.what() << std::endl;
+    }
+
+    return languages;
+}
+
+const std::string deepl::translate(const std::string &text, const std::string &source, const std::string &target)
+{
+    const dpp::http_headers http_headers = {
+        {"Authorization"s, "DeepL-Auth-Key "s + m_apiKey},
+        {"Content-Type"s, "application/json"s}
+    };
+
+    dpp::json json_body = {
+        {"text"s, { text } },
+        {"target_lang"s, target},
+    };
+
+    try {
+        dpp::https_client http_request(m_hostname, 443, "/v2/translate", "POST", json_body.dump(), http_headers, false);
+        if (http_request.get_status() == 200) {
+            const dpp::json response = dpp::json::parse(http_request.get_content());
+            if (response.is_object()) {
+                auto translations = response.find("translations");
+                if (translations != response.end() && translations->is_array()) {
+                    for (auto translation = translations->begin(); translation != translations->end(); translation++) {
+                        auto tr_text = translation->find("text");
+                        if (tr_text != translation->end())
+                            return *tr_text;
+                    }
+                }
+            }
+        }
+    }
+    catch (const std::exception &exception) {
+        std::cerr << "[Exception] " << exception.what() << std::endl;
+    }
+
+    return text;
+}

src/translator/deepl/deepl.h

@@ -0,0 +1,40 @@
+/*****************************************************************************
+* dtranslatebot Discord Translate Bot
+* Copyright (C) 2024 Syping
+*
+* Redistribution and use in source and binary forms, with or without modification,
+* are permitted provided that the following conditions are met:
+*
+* 1. Redistributions of source code must retain the above copyright notice,
+* this list of conditions and the following disclaimer.
+*
+* 2. Redistributions in binary form must reproduce the above copyright notice,
+* this list of conditions and the following disclaimer in the documentation
+* and/or other materials provided with the distribution.
+*
+* This software is provided as-is, no warranties are given to you, we are not
+* responsible for anything with use of the software, you are self responsible.
+*****************************************************************************/
+
+#ifndef TRANSLATOR_DEEPL_H
+#define TRANSLATOR_DEEPL_H
+
+#include "../../core/translator.h"
+
+namespace bot {
+    namespace translator {
+        class deepl : public translator {
+        public:
+            explicit deepl(const std::string &hostname, const std::string apiKey = {});
+            ~deepl() override;
+            const std::vector<language> get_languages() override;
+            const std::string translate(const std::string &text, const std::string &source, const std::string &target) override;
+
+        private:
+            std::string m_apiKey;
+            std::string m_hostname;
+        };
+    }
+}
+
+#endif // TRANSLATOR_DEEPL_H