Create pencil_utils.hpp

pencil_utils.hpp

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+// pencil_utils.hpp – Notepad logic: directories, templates, session log
+#ifndef PENCIL_UTILS_HPP
+#define PENCIL_UTILS_HPP
+
+#include <iostream>
+#include <fstream>
+#include <string>
+#include <filesystem>
+#include <map>
+
+namespace pencil {
+    const std::string PENCIL_DIR = "./pencil_data/";
+    const std::string SESSION_LOG = "session.log";
+    const std::string BOOK_FILE = "book.txt";
+
+    // Ensure the working directory exists. Returns true on success or if already exists.
+    inline bool init_workspace() {
+        std::error_code ec;
+        bool created = std::filesystem::create_directory(PENCIL_DIR, ec);
+        if (ec) {
+            std::cerr << "Error creating directory " << PENCIL_DIR << ": " << ec.message() << std::endl;
+            return false;
+        }
+        return true; // either created or already existed (create_directory returns false if existed, but no error)
+    }
+
+    // Append a line to the session log. Returns true on success.
+    inline bool append_to_session(const std::string& text) {
+        std::ofstream log(PENCIL_DIR + SESSION_LOG, std::ios::app);
+        if (!log) return false;
+        log << text << std::endl;
+        return !log.fail();
+    }
+
+    // Read entire file content
+    inline std::string read_file(const std::string& path) {
+        std::ifstream f(path);
+        if (!f) return "";
+        std::string content((std::istreambuf_iterator<char>(f)),
+                             std::istreambuf_iterator<char>());
+        return content;
+    }
+
+    // Save text to a file (overwrite). Returns true on success.
+    inline bool save_text(const std::string& path, const std::string& text) {
+        std::ofstream f(path);
+        if (!f) return false;
+        f << text;
+        return !f.fail();
+    }
+
+    // Append to the book file. Returns true on success.
+    inline bool append_to_book(const std::string& text) {
+        std::ofstream book(PENCIL_DIR + BOOK_FILE, std::ios::app);
+        if (!book) return false;
+        book << text << std::endl;
+        return !book.fail();
+    }
+
+    // Return a prompt template for each ADA command
+    inline std::string get_template(const std::string& cmd) {
+        static std::map<std::string, std::string> templates = {
+            {"/STORY", "Write a creative story with the following title. Use vivid descriptions and a clear narrative."},
+            {"/POEM", "Compose a poem about the given subject. Use rhythm and imagery."},
+            {"/BOOK", "You are a novelist. Continue the existing book by writing a new chapter. Maintain style and characters."}
+        };
+        auto it = templates.find(cmd);
+        if (it != templates.end()) return it->second;
+        return "";
+    }
+}
+
+#endif // PENCIL_UTILS_HPP