61 lines
2.1 KiB
Rust
61 lines
2.1 KiB
Rust
use crate::commands::{CommandSender, DISPATCHER, dispatcher_init};
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use crate::commands::dispatcher::{CommandDispatcher, InvalidTreeError};
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use crate::commands::dispatcher::InvalidTreeError::InvalidConsumptionError;
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use crate::commands::tree::{CommandTree, ConsumedArgs, RawArgs};
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use crate::commands::tree_builder::argument;
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pub(crate) const NAME: &str = "help";
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pub(crate) const ALIAS: &str = "?";
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const DESCRIPTION: &str = "Print a help message.";
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const ARG_COMMAND: &str = "command";
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fn consume_arg_command(_src: &CommandSender, args: &mut RawArgs) -> Option<String> {
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let s = args.pop()?;
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let dispatcher = DISPATCHER;
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let dispatcher = dispatcher.get_or_init(dispatcher_init);
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if dispatcher.commands.contains_key(s) { Some(s.into()) }
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else { None }
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}
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fn parse_arg_command<'a>(consumed_args: &'a ConsumedArgs, dispatcher: &'a CommandDispatcher) -> Result<(&'a str, &'a CommandTree<'a>), InvalidTreeError> {
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let command_name = consumed_args.get(ARG_COMMAND)
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.ok_or(InvalidConsumptionError(None))?;
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if let Some(tree) = dispatcher.commands.get::<&str>(&command_name.as_str()) {
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Ok((command_name, tree))
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} else {
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Err(InvalidConsumptionError(Some(command_name.into())))
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}
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}
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pub(crate) fn init_command_tree<'a>() -> CommandTree<'a> {
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CommandTree::new(DESCRIPTION).with_child(
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argument(ARG_COMMAND, consume_arg_command).execute(&|sender, args| {
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let dispatcher = DISPATCHER;
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let dispatcher = dispatcher.get_or_init(dispatcher_init);
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let (name, tree) = parse_arg_command(args, dispatcher)?;
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sender.send_message(
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format!("{} - {} Usage:{}", name, tree.description, tree.paths_formatted(name)).into()
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);
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Ok(())
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})
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).execute(&|sender, _args| {
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let dispatcher = DISPATCHER;
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let dispatcher = dispatcher.get_or_init(dispatcher_init);
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for (name, tree) in &dispatcher.commands {
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sender.send_message(
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format!("{} - {} Usage:{}", name, tree.description, tree.paths_formatted(name)).into()
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);
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};
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Ok(())
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})
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} |