Adding read file tool

CMakeLists.txt

@@ -16,6 +16,7 @@ add_library(drharness_lib
     tools/agent_tool.cpp
     tools/edit_tool.cpp
     tools/file_list_tool.cpp
+    tools/file_read_tool.cpp
 )
 target_include_directories(drharness_lib PUBLIC include tools)
 target_link_libraries(drharness_lib

src/main.cpp

@@ -6,6 +6,7 @@
 #include "agent_tool.hpp"
 #include "edit_tool.hpp"
 #include "file_list_tool.hpp"
+#include "file_read_tool.hpp"
 #include <cstdlib>
 #include <iostream>
 #include <fstream>
@@ -28,6 +29,7 @@ static const std::vector<std::string> default_tools =
     "run_shell",
     "edit",
     "list_files",
+    "read_file",
 };
 
 
@@ -42,8 +44,8 @@ int main(int argc, char** argv) {
     master_registery.register_tool(make_shell_tool());
     master_registery.register_tool(make_edit_tool());
     master_registery.register_tool(make_file_list_tool());
+    master_registery.register_tool(make_file_read_tool());
     // Add more base tools here:
-    // registry.register_tool(make_file_read_tool());
 
     for (const auto& profile : profiles)
         master_registery.register_tool(make_agent_tool(profile, master_registery, cfg.base_url));

tools/file_read_tool.cpp

@@ -0,0 +1,43 @@
+#include "file_read_tool.hpp"
+#include <fstream>
+#include <stdexcept>
+#include <string>
+#include <filesystem>
+
+Tool make_file_read_tool() {
+    return Tool{
+        .name        = "read_file",
+        .description = "Read the contents of a text file.",
+        .parameters_schema = {
+            {"type", "object"},
+            {"properties", {
+                {"path", {
+                    {"type", "string"},
+                    {"description", "The absolute path to the file to read."}
+                }}
+            }},
+            {"required", {"path"}}
+        },
+        .execute = [](const nlohmann::json& args) -> std::string {
+            if (!args.contains("path") || !args["path"].is_string())
+                return "Error: missing or invalid required parameter 'path'";
+
+            std::string file_path = args["path"].get<std::string>();
+
+            if (!std::filesystem::exists(file_path))
+                return "Error: file does not exist: " + file_path;
+            if (!std::filesystem::is_regular_file(file_path))
+                return "Error: path is not a regular file: " + file_path;
+
+            std::ifstream file(file_path);
+            if (!file.is_open())
+                return "Error: could not open file: " + file_path;
+
+            // Use char as template argument for text file
+            std::string content((std::istreambuf_iterator<char>(file)),
+                               std::istreambuf_iterator<char>());
+            
+            return content.empty() ? "(empty file)" : content;
+        }
+    };
+}

tools/file_read_tool.hpp

@@ -0,0 +1,4 @@
+#pragma once
+#include "tool.hpp"
+
+Tool make_file_read_tool();