add experimental deepl support

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;
+}