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use std::{
any::Any,
fmt::{self, Debug},
sync::Arc,
};
use super::argument_builder::{ArgumentBuilder, ArgumentBuilderType};
use crate::{
arguments::ArgumentType,
context::CommandContext,
errors::CommandSyntaxError,
string_reader::StringReader,
suggestion::{SuggestionProvider, Suggestions, SuggestionsBuilder},
};
/// An argument node type.
///
/// The `T` type parameter is the type of the argument, which can be anything.
pub struct Argument<S, R> {
pub name: String,
parser: Arc<dyn ArgumentType + Send + Sync>,
custom_suggestions: Option<Arc<dyn SuggestionProvider<S, R> + Send + Sync>>,
}
impl<S, R> Argument<S, R> {
pub fn new(
name: &str,
parser: Arc<dyn ArgumentType + Send + Sync>,
custom_suggestions: Option<Arc<dyn SuggestionProvider<S, R> + Send + Sync>>,
) -> Self {
Self {
name: name.to_owned(),
parser,
custom_suggestions,
}
}
pub fn parse(&self, reader: &mut StringReader) -> Result<Arc<dyn Any>, CommandSyntaxError> {
self.parser.parse(reader)
}
pub fn list_suggestions(
&self,
context: CommandContext<S, R>,
builder: SuggestionsBuilder,
) -> Suggestions {
if let Some(s) = &self.custom_suggestions {
s.get_suggestions(context, builder)
} else {
self.parser.list_suggestions(builder)
}
}
pub fn examples(&self) -> Vec<String> {
self.parser.examples()
}
}
impl<S, R> From<Argument<S, R>> for ArgumentBuilderType<S, R> {
fn from(argument: Argument<S, R>) -> Self {
Self::Argument(argument)
}
}
impl<S, R> Debug for Argument<S, R> {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
f.debug_struct("Argument")
.field("name", &self.name)
// .field("parser", &self.parser)
.finish()
}
}
/// Shortcut for creating a new argument builder node.
pub fn argument<S, R>(
name: &str,
parser: impl ArgumentType + Send + Sync + 'static,
) -> ArgumentBuilder<S, R> {
ArgumentBuilder::new(Argument::new(name, Arc::new(parser), None).into())
}
impl<S, R> Clone for Argument<S, R> {
fn clone(&self) -> Self {
Self {
name: self.name.clone(),
parser: self.parser.clone(),
custom_suggestions: self.custom_suggestions.clone(),
}
}
}
|
