From b8e049f02a16dc8398b2a954b561c84beda423c7 Mon Sep 17 00:00:00 2001
From: Aldrik Ramaekers <aldrikboy@gmail.com>
Date: Sat, 4 Oct 2025 13:57:52 +0200
Subject: deepseek ai backend

---
 src/ai_providers/DeepSeek.cpp | 118 ++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 118 insertions(+)
 create mode 100644 src/ai_providers/DeepSeek.cpp

(limited to 'src/ai_providers/DeepSeek.cpp')

diff --git a/src/ai_providers/DeepSeek.cpp b/src/ai_providers/DeepSeek.cpp
new file mode 100644
index 0000000..67d17c2
--- /dev/null
+++ b/src/ai_providers/DeepSeek.cpp
@@ -0,0 +1,118 @@
+/*
+* Copyright (c) 2025 Aldrik Ramaekers <aldrik.ramaekers@gmail.com>
+* 
+* Permission to use, copy, modify, and/or distribute this software for any
+* purpose with or without fee is hereby granted, provided that the above
+* copyright notice and this permission notice appear in all copies.
+* 
+* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+*/
+
+#define _CRT_SECURE_NO_WARNINGS
+
+#include <fstream>
+#include <iostream>
+#include <string>
+
+#define CPPHTTPLIB_OPENSSL_SUPPORT
+#include "httplib.h"
+#include "strops.hpp"
+#include "log.hpp"
+#include "import_service.hpp"
+
+#define QUERY_BUFFER_SIZE 1000000
+
+char* query_buffer = 0;
+static bool _DeepSeek_query_with_file(char* query, size_t query_length, char* file_id, char** response)
+{
+    assert(query_buffer);
+
+    const char *api_key = administration_get_ai_service().api_key_public;
+    
+    httplib::SSLClient cli("api.deepseek.com");
+    //cli.enable_server_certificate_verification(false);
+
+    //char* query_escaped = strops_prep_str_for_json(query, query_length);
+    //free(query); // TODO why??
+
+    size_t file_size = strlen(query_buffer);
+    sprintf(query_buffer + file_size, "%s", query);
+
+    char* query_escaped = strops_prep_str_for_json(query_buffer, strlen(query_buffer));
+    
+    size_t body_size = file_size + QUERY_BUFFER_SIZE;
+    char* body = (char*)malloc(body_size);
+    snprintf(body, body_size, 
+        "{\"model\":\"deepseek-reasoner\", \"messages\": [ { \"role\": \"user\", \"content\": \"%s\" } ] }", query_escaped);
+
+    httplib::Headers headers;
+    headers.insert(std::make_pair("Authorization", std::string("Bearer ") + api_key));
+    headers.insert(std::make_pair("Content-Type", "application/json"));
+    headers.insert(std::make_pair("Accept", "application/json"));
+
+    httplib::Result res = cli.Post("/chat/completions", headers, body, "application/json");
+    free(body);
+
+    if (!res || res->status != 200) {
+        log_error("ERROR Failed to query API.");
+        log_error(res->body.c_str());
+        return 0;
+    }
+
+    char* response_body = (char*)res->body.c_str();
+    *response = (char*)malloc(100000);
+    memset(*response, 0, 100000);
+    strncpy(*response, response_body, 100000);
+    
+    strops_get_json_value(*response, "content", *response, 100000);
+    *response = strops_unprep_str_from_json(*response);
+
+    return 1;
+}
+
+static bool _DeepSeek_upload_file(char* file_path, char* file_id, size_t file_id_len)
+{
+    const char *filename = strops_get_filename(file_path);
+
+    FILE* orig_file = fopen(file_path, "r");
+    if (orig_file == NULL) {
+        log_error("ERROR: file to upload could not be opened.");
+        return 0;
+    }
+
+    fseek(orig_file, 0L, SEEK_END);
+    long sz = ftell(orig_file);
+    fseek(orig_file, 0, SEEK_SET);
+
+    size_t buffer_size = sz + QUERY_BUFFER_SIZE;
+    char* file_content_buffer = (char*)malloc(buffer_size);
+    memset(file_content_buffer, 0, buffer_size);
+
+    query_buffer = file_content_buffer;
+
+    file_content_buffer += sprintf(file_content_buffer, "[file name]: %s\n", filename);
+    file_content_buffer += sprintf(file_content_buffer, "[file content begin]\n");
+
+    fread(file_content_buffer, sz, 1, orig_file);
+    file_content_buffer += sz;    
+    
+    for (int i = 0; i < file_content_buffer-query_buffer; i++) if (query_buffer[i] <= 0x1f) query_buffer[i] = ' ';
+    
+    file_content_buffer += sprintf(file_content_buffer, "\n[file content end]\n");
+    file_content_buffer[0] = 0;
+
+    fclose(orig_file);    
+
+    return 1;
+}
+
+ai_provider_impl _deepseek_api_provider = {
+    _DeepSeek_upload_file,
+    _DeepSeek_query_with_file,
+};
\ No newline at end of file
-- 
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