restore core files accidentally deleted during folder restructure

include/builtins.h

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+/**
+ * builtins.h
+ * Declarations for all built-in shell commands
+ */
+
+#ifndef BUILTINS_H
+#define BUILTINS_H
+
+#include "common.h"
+#include "system_monitor.h"
+#include <time.h>
+
+// Syntax highlighting definitions using ANSI colors
+#define COLOR_DEFAULT ANSI_COLOR_RESET
+#define COLOR_KEYWORD ANSI_COLOR_CYAN
+#define COLOR_STRING ANSI_COLOR_GREEN
+#define COLOR_COMMENT "\x1b[90m" // Dark gray
+#define COLOR_NUMBER ANSI_COLOR_MAGENTA
+#define COLOR_PREPROCESSOR ANSI_COLOR_YELLOW
+#define COLOR_IDENTIFIER "\x1b[97m" // Bright white
+
+// Add declarations for color functions
+void set_color(int color);
+void reset_color();
+
+// History command implementation
+#define HISTORY_SIZE 10
+
+// New struct to hold history entries with timestamps
+typedef struct {
+  char *command;
+  time_t timestamp;
+} HistoryEntry;
+
+// History variables - made extern to be accessible from line_reader.c
+extern HistoryEntry command_history[HISTORY_SIZE];
+extern int history_count;
+extern int history_index;
+
+// Built-in command declarations
+int lsh_cd(char **args);
+int lsh_help(char **args);
+int lsh_exit(char **args);
+int lsh_dir(char **args);
+int lsh_clear(char **args);
+int lsh_mkdir(char **args);
+int lsh_rmdir(char **args);
+int lsh_del(char **args);
+int lsh_touch(char **args);
+int lsh_pwd(char **args);
+int lsh_cat(char **args);
+int lsh_history(char **args);
+int lsh_copy(char **args);
+int lsh_paste(char **args);
+int lsh_move(char **args);
+int lsh_ps(char **args);
+int lsh_news(char **args);
+// Alias command declarations - added for alias support
+int lsh_alias(char **args);
+int lsh_unalias(char **args);
+int lsh_aliases(char **args); // New command to list all aliases
+// Bookmark command declarations - added for bookmark support
+int lsh_bookmark(char **args);
+int lsh_bookmarks(char **args);
+int lsh_goto(char **args);
+int lsh_unbookmark(char **args);
+int lsh_focus_timer(char **args);
+int lsh_weather(char **args);
+// Text search command
+int lsh_grep(char **args);
+int lsh_actual_grep(char **args);
+int lsh_ripgrep(char **args);
+int lsh_fzf_native(char **args);
+int lsh_clip(char **args);
+int lsh_echo(char **args);
+int lsh_self_destruct();
+int lsh_theme(char **args);
+int lsh_loc(char **args);
+int lsh_git_status(char **args);
+int lsh_gg(char **args);
+int lsh_stats(char **args);
+
+// Add command to history
+void lsh_add_to_history(const char *command);
+
+// Get number of builtin commands
+int lsh_num_builtins(void);
+
+// Expose the builtin command strings and function pointers
+extern char *builtin_str[];
+extern int (*builtin_func[])(char **);
+
+/**
+ * Extract a string value from a JSON object
+ *
+ * @param json The JSON string to parse
+ * @param key The key to find
+ * @return Allocated string containing the value (caller must free)
+ */
+char *extract_json_string(const char *json, const char *key);
+
+#endif // BUILTINS_H

include/common.h

@@ -0,0 +1,116 @@
+/**
+ * common.h
+ * Common includes, defines and macros used throughout the shell
+ */
+
+#ifndef COMMON_H
+#define COMMON_H
+
+// Standard library includes
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <ctype.h>    // For isprint
+#include <fcntl.h>    // For file control
+#include <unistd.h>   // For POSIX API (replaces direct.h)
+#include <sys/types.h>
+#include <sys/wait.h>  // For waitpid
+#include <sys/stat.h>  // For stat (replaces fileapi.h)
+#include <termios.h>   // For terminal control
+#include <sys/ioctl.h> // For console dimensions
+#include <signal.h>    // For signal handling
+#include <time.h>      // For time functions
+#include <limits.h>    // For PATH_MAX
+
+// Define PATH_MAX if not defined
+#ifndef PATH_MAX
+#define PATH_MAX 4096
+#endif
+
+// Common defines
+#define LSH_RL_BUFSIZE 1024
+#define LSH_TOK_BUFSIZE 64
+#define LSH_TOK_DELIM " \t\r\n\a"
+
+// Terminal control and color codes (ANSI sequences)
+#define ANSI_COLOR_RESET   "\x1b[0m"
+#define ANSI_COLOR_BLACK   "\x1b[30m"
+#define ANSI_COLOR_RED     "\x1b[31m"
+#define ANSI_COLOR_GREEN   "\x1b[32m"
+#define ANSI_COLOR_YELLOW  "\x1b[33m"
+#define ANSI_COLOR_BLUE    "\x1b[34m"
+#define ANSI_COLOR_MAGENTA "\x1b[35m"
+#define ANSI_COLOR_CYAN    "\x1b[36m"
+#define ANSI_COLOR_WHITE   "\x1b[37m"
+
+// Background colors
+#define ANSI_BG_BLACK   "\x1b[40m"
+#define ANSI_BG_RED     "\x1b[41m"
+#define ANSI_BG_GREEN   "\x1b[42m"
+#define ANSI_BG_YELLOW  "\x1b[43m"
+#define ANSI_BG_BLUE    "\x1b[44m"
+#define ANSI_BG_MAGENTA "\x1b[45m"
+#define ANSI_BG_CYAN    "\x1b[46m"
+#define ANSI_BG_WHITE   "\x1b[47m"
+
+// Cursor movement and screen control
+#define ANSI_CLEAR_SCREEN "\x1b[2J"
+#define ANSI_CURSOR_HOME  "\x1b[H"
+#define ANSI_SAVE_CURSOR  "\x1b[s"
+#define ANSI_RESTORE_CURSOR "\x1b[u"
+
+// Key code definitions used by the line reader
+#define KEY_BACKSPACE 127  // Different on Linux
+#define KEY_TAB 9
+#define KEY_ENTER 10       // Linux: 10 (LF) or 13 (CR)
+#define KEY_ESCAPE 27
+
+// Special keys (Linux terminal uses escape sequences)
+// These will need handling in the line reader
+#define KEY_UP    1000
+#define KEY_DOWN  1001
+#define KEY_LEFT  1002
+#define KEY_RIGHT 1003
+#define KEY_SHIFT_ENTER 1010
+#define KEY_SHIFT_TAB 1011
+
+// Typedefs for compatibility
+typedef unsigned int UINT;
+typedef unsigned short WORD;
+typedef int BOOL;
+typedef int HANDLE;
+typedef int DWORD;
+
+// Define Windows constants
+#define FALSE 0
+#define TRUE 1
+
+// Struct to replace COORD
+typedef struct {
+    short X;
+    short Y;
+} COORD;
+
+// Struct to replace SMALL_RECT
+typedef struct {
+    short Left;
+    short Top;
+    short Right;
+    short Bottom;
+} SMALL_RECT;
+
+// Struct to replace CONSOLE_SCREEN_BUFFER_INFO
+typedef struct {
+    COORD dwSize;
+    COORD dwCursorPosition;
+    WORD wAttributes;
+    SMALL_RECT srWindow;
+} CONSOLE_SCREEN_BUFFER_INFO;
+
+// Struct to replace CONSOLE_CURSOR_INFO
+typedef struct {
+    DWORD dwSize;
+    BOOL bVisible;
+} CONSOLE_CURSOR_INFO;
+
+#endif // COMMON_H

include/shell.h

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+/**
+ * shell.h
+ * Core shell functionality
+ */
+
+#ifndef SHELL_H
+#define SHELL_H
+
+#include "common.h"
+#include "structured_data.h"
+
+/**
+ * Display a welcome banner with BBQ sauce invention time
+ */
+void display_welcome_banner(void);
+
+/**
+ * Execute a command
+ *
+ * @param args Null-terminated array of command arguments
+ * @return 1 to continue the shell, 0 to exit
+ */
+int lsh_execute(char **args);
+
+/**
+ * Execute a pipeline of commands
+ *
+ * @param commands Null-terminated array of command arrays
+ * @return 1 to continue the shell, 0 to exit
+ */
+int lsh_execute_piped(char ***commands);
+
+/**
+ * Create a TableData structure from an ls command
+ *
+ * @param args Command arguments
+ * @return TableData pointer (must be freed by caller) or NULL on error
+ */
+TableData* create_ls_table(char **args);
+
+/**
+ * Parse input line into an array of commands (for pipelines)
+ *
+ * @param line Input command line
+ * @return Null-terminated array of command arrays
+ */
+char*** lsh_split_commands(char *line);
+
+/**
+ * Launch an external program
+ *
+ * @param args Null-terminated array of command arguments
+ * @return Always returns 1 (continue the shell)
+ */
+int lsh_launch(char **args);
+
+/**
+ * Main shell loop
+ */
+void lsh_loop(void);
+
+/**
+ * Free memory for a command array from lsh_split_commands
+ */
+void free_commands(char ***commands);
+
+/**
+ * Initialize the status bar at the bottom of the screen
+ *
+ * @param fd File descriptor for terminal (STDOUT_FILENO)
+ * @return 1 if successful, 0 on failure
+ */
+int init_status_bar(int fd);
+
+/**
+ * Temporarily hide the status bar before command execution
+ *
+ * @param fd File descriptor for terminal (STDOUT_FILENO)
+ */
+void hide_status_bar(int fd);
+
+/**
+ * Ensures there's space for the status bar by scrolling if needed
+ *
+ * @param fd File descriptor for terminal (STDOUT_FILENO)
+ */
+void ensure_status_bar_space(int fd);
+
+/**
+ * Check for terminal window resize and update status bar position
+ *
+ * @param fd File descriptor for terminal (STDOUT_FILENO)
+ */
+void check_console_resize(int fd);
+
+/**
+ * Update the status bar with Git information
+ *
+ * @param fd File descriptor for terminal (STDOUT_FILENO)
+ * @param git_info The Git information to display in the status bar
+ */
+void update_status_bar(int fd, const char *git_info);
+
+/**
+ * Get the name of the parent and current directories from a path
+ *
+ * @param cwd The current working directory path
+ * @param parent_dir_name Buffer to store the parent directory name
+ * @param current_dir_name Buffer to store the current directory name
+ * @param buf_size Size of the buffers
+ */
+void get_path_display(const char *cwd, char *parent_dir_name,
+                      char *current_dir_name, size_t buf_size);
+
+/**
+ * Initialize the terminal for raw mode
+ * 
+ * @param orig_termios Original terminal settings to restore later
+ * @return File descriptor for terminal
+ */
+int init_terminal(struct termios *orig_termios);
+
+/**
+ * Restore terminal to original settings
+ * 
+ * @param fd File descriptor for terminal
+ * @param orig_termios Original terminal settings
+ */
+void restore_terminal(int fd, struct termios *orig_termios);
+
+/**
+ * Get console dimensions
+ * 
+ * @param fd File descriptor for terminal
+ * @param width Pointer to store width
+ * @param height Pointer to store height
+ * @return 1 on success, 0 on failure
+ */
+int get_console_dimensions(int fd, int *width, int *height);
+
+#endif // SHELL_H

src/main.c

@@ -0,0 +1,26 @@
+/**
+ * main.c
+ * Entry point for the LSH shell program
+ */
+
+#include "common.h"
+#include "shell.h"
+#include <locale.h>
+
+/**
+ * Main entry point
+ */
+
+int main(int argc, char **argv) {
+  // Set locale to support UTF-8
+  setlocale(LC_ALL, "en_US.UTF-8");
+
+  // Setup terminal for proper UTF-8 handling
+  // This is Linux equivalent of SetConsoleOutputCP(65001)
+  printf("\033%%G"); // Tell terminal to use UTF-8
+
+  // Start the shell loop
+  lsh_loop();
+
+  return EXIT_SUCCESS;
+}