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|
const std = @import("std");
const types = @import("lib/types.zig");
const CommandContext = types.CommandContext;
const CommandStatus = types.CommandStatus;
const OutputCapture = types.OutputCapture;
pub const Help = struct {
command: ?[]const u8 = null,
pub fn eval(self: Help, ctx: CommandContext) !CommandStatus {
if (self.command) |cmd| {
return showCommandHelp(cmd, ctx);
} else {
return showGeneralHelp(ctx);
}
}
};
fn showGeneralHelp(ctx: CommandContext) !CommandStatus {
const help_text =
\\DOSE - DOS-style Command Shell
\\
\\Available commands:
\\
\\File Operations:
\\ COPY - Copy files
\\ DIR - Display directory contents
\\ TYPE - Display file contents
\\ CD - Change directory
\\ MD - Create directory
\\ RD - Remove directory
\\ REN - Rename files/directories
\\ DEL - Delete files
\\ MOVE - Move files/directories
\\
\\System Commands:
\\ ECHO - Display messages or control echo state
\\ CLS - Clear screen
\\ DATE - Display current date
\\ TIME - Display current time
\\ VER - Display version information
\\ PATH - Display or set PATH environment variable
\\ SORT - Sort input lines alphabetically
\\ EXIT - Exit the shell
\\
\\For help on a specific command, type: command /?
\\Example: DIR /?
\\
;
var writer = ctx.output_writer;
try writer.write(help_text);
return CommandStatus{ .Code = 0 };
}
fn showCommandHelp(command: []const u8, ctx: CommandContext) !CommandStatus {
const cmd_upper = try std.ascii.allocUpperString(ctx.allocator, command);
defer ctx.allocator.free(cmd_upper);
const help_text = getCommandSpecificHelp(cmd_upper);
var writer = ctx.output_writer;
try writer.write(help_text);
return CommandStatus{ .Code = 0 };
}
fn getCommandSpecificHelp(command: []const u8) []const u8 {
if (std.mem.eql(u8, command, "DIR")) {
return
\\DIR - Display directory contents
\\
\\Syntax: DIR [path] [/flags]
\\
\\ path Directory path to list (default: current directory)
\\
\\Flags:
\\ /? Display this help message
\\ /W Use wide list format (filenames only, multiple columns)
\\ /B Use bare format (filenames only, one per line)
\\ /S Display files in subdirectories as well
\\
\\Example: DIR C:\ /W
\\
;
} else if (std.mem.eql(u8, command, "COPY")) {
return
\\COPY - Copy files
\\
\\Syntax: COPY source destination [/flags]
\\
\\ source Source file or device
\\ destination Destination file or device
\\
\\Flags:
\\ /? Display this help message
\\ /Y Suppress prompting to confirm overwrite
\\
\\Example: COPY file1.txt file2.txt
\\
;
} else if (std.mem.eql(u8, command, "TYPE")) {
return
\\TYPE - Display file contents
\\
\\Syntax: TYPE filename [/flags]
\\
\\ filename File to display
\\
\\Flags:
\\ /? Display this help message
\\
\\Example: TYPE readme.txt
\\
;
} else if (std.mem.eql(u8, command, "CD") or std.mem.eql(u8, command, "CHDIR")) {
return
\\CD/CHDIR - Change directory
\\
\\Syntax: CD [path] [/flags]
\\
\\ path Directory to change to
\\
\\Flags:
\\ /? Display this help message
\\
\\Example: CD C:\Windows
\\
;
} else if (std.mem.eql(u8, command, "ECHO")) {
return
\\ECHO - Display messages or control echo state
\\
\\Syntax: ECHO [message] [/flags]
\\ ECHO ON|OFF
\\
\\ message Text to display
\\
\\Flags:
\\ /? Display this help message
\\
\\Example: ECHO Hello World
\\
;
} else if (std.mem.eql(u8, command, "CLS")) {
return
\\CLS - Clear screen
\\
\\Syntax: CLS [/flags]
\\
\\Flags:
\\ /? Display this help message
\\
;
} else if (std.mem.eql(u8, command, "EXIT")) {
return
\\EXIT - Exit the shell
\\
\\Syntax: EXIT [/flags]
\\
\\Flags:
\\ /? Display this help message
\\
;
} else if (std.mem.eql(u8, command, "VER")) {
return
\\VER - Display version information
\\
\\Syntax: VER [/flags]
\\
\\Flags:
\\ /? Display this help message
\\
;
} else if (std.mem.eql(u8, command, "DATE")) {
return
\\DATE - Display current date
\\
\\Syntax: DATE [/flags]
\\
\\Flags:
\\ /? Display this help message
\\
;
} else if (std.mem.eql(u8, command, "TIME")) {
return
\\TIME - Display current time
\\
\\Syntax: TIME [/flags]
\\
\\Flags:
\\ /? Display this help message
\\
;
} else if (std.mem.eql(u8, command, "MD") or std.mem.eql(u8, command, "MKDIR")) {
return
\\MD/MKDIR - Create directory
\\
\\Syntax: MD directory [/flags]
\\ MKDIR directory [/flags]
\\
\\ directory Directory path to create
\\
\\Flags:
\\ /? Display this help message
\\
\\Example: MD C:\TEMP
\\Note: Creates intermediate directories if needed
\\
;
} else if (std.mem.eql(u8, command, "RD") or std.mem.eql(u8, command, "RMDIR")) {
return
\\RD/RMDIR - Remove directory
\\
\\Syntax: RD directory [/flags]
\\ RMDIR directory [/flags]
\\
\\ directory Directory path to remove
\\
\\Flags:
\\ /? Display this help message
\\
\\Example: RD C:\TEMP
\\Note: Directory must be empty
\\
;
} else if (std.mem.eql(u8, command, "REN") or std.mem.eql(u8, command, "RENAME")) {
return
\\REN/RENAME - Rename files or directories
\\
\\Syntax: REN oldname newname [/flags]
\\ RENAME oldname newname [/flags]
\\
\\ oldname Current name of file or directory
\\ newname New name for file or directory
\\
\\Flags:
\\ /? Display this help message
\\
\\Example: REN file1.txt file2.txt
\\
;
} else if (std.mem.eql(u8, command, "MOVE")) {
return
\\MOVE - Move files or directories
\\
\\Syntax: MOVE source destination [/flags]
\\
\\ source Source file or directory
\\ destination Destination path
\\
\\Flags:
\\ /? Display this help message
\\
\\Example: MOVE file1.txt C:\TEMP\file1.txt
\\Note: MOVE command is currently a placeholder
\\
;
} else if (std.mem.eql(u8, command, "PATH")) {
return
\\PATH - Display or set PATH environment variable
\\
\\Syntax: PATH [/flags]
\\ PATH newpath [/flags]
\\ PATH=newpath
\\
\\ newpath New PATH value to set
\\
\\Flags:
\\ /? Display this help message
\\
\\Example: PATH C:\DOS;C:\UTILS
\\Note: Without arguments, displays current PATH
\\
;
} else if (std.mem.eql(u8, command, "SORT")) {
return
\\SORT - Sort input lines alphabetically
\\
\\Syntax: SORT [/flags]
\\
\\Flags:
\\ /? Display this help message
\\
\\Example: TYPE file.txt | SORT
\\Note: Reads from standard input and sorts lines
\\
;
} else if (std.mem.eql(u8, command, "DEL") or std.mem.eql(u8, command, "ERASE")) {
return
\\DEL/ERASE - Delete files
\\
\\Syntax: DEL filename [/flags]
\\ ERASE filename [/flags]
\\
\\ filename File to delete
\\
\\Flags:
\\ /? Display this help message
\\
\\Example: DEL temp.txt
\\Note: Wildcard deletion not yet implemented
\\
;
} else {
return
\\Unknown command. Type HELP for a list of commands.
\\
;
}
}
|
