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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 /?
\\
;
if (ctx.output_capture) |output| {
try output.write(help_text);
} else {
try std.io.getStdOut().writeAll(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);
if (ctx.output_capture) |output| {
try output.write(help_text);
} else {
try std.io.getStdOut().writeAll(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 {
return
\\Unknown command. Type HELP for a list of commands.
\\
;
}
}
|
