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#![allow(clippy::borrowed_box)]
use crate::{
AnyOutput, ChainProcess, Dispatcher, Next, Program, ProgramCollect, RenderResult,
error::ProgramInternalExecuteError,
};
#[doc(hidden)]
pub mod error;
#[cfg(feature = "async")]
pub async fn exec<C>(
program: &'static Program<C>,
) -> Result<RenderResult, ProgramInternalExecuteError>
where
C: ProgramCollect<Enum = C>,
{
#[cfg(not(feature = "dispatch_tree"))]
let mut current = dispatch_args_dynamic(program, &program.args)?;
#[cfg(feature = "dispatch_tree")]
let mut current = C::dispatch_args_trie(&program.args)?;
let mut stop_next = false;
// If the program has Help enabled, skip actual logic and jump to Help
if program.user_context.help {
return Ok(render_help::<C>(program, current));
}
loop {
let final_exec = stop_next;
current = {
// If a chain exists, execute as a chain
if C::has_chain(¤t) {
match C::do_chain(current).await {
ChainProcess::Ok((any, Next::Renderer)) => {
return Ok(render::<C>(program, any));
}
ChainProcess::Ok((any, Next::Chain)) => any,
ChainProcess::Err(e) => return Err(e.into()),
}
}
// If no chain exists, attempt to render
else if C::has_renderer(¤t) {
return Ok(render::<C>(program, current));
}
// No renderer exists
else {
stop_next = true;
C::build_renderer_not_found(current.member_id)
}
};
if final_exec && stop_next {
break;
}
}
Ok(RenderResult::default())
}
#[cfg(not(feature = "async"))]
pub fn exec<C>(program: &'static Program<C>) -> Result<RenderResult, ProgramInternalExecuteError>
where
C: ProgramCollect<Enum = C>,
{
#[cfg(not(feature = "dispatch_tree"))]
let mut current = dispatch_args_dynamic(program, &program.args)?;
#[cfg(feature = "dispatch_tree")]
let mut current = C::dispatch_args_trie(&program.args)?;
let mut stop_next = false;
// If the program has Help enabled, skip actual logic and jump to Help
if program.user_context.help {
return Ok(render_help::<C>(program, current));
}
loop {
let final_exec = stop_next;
current = {
// If a chain exists, execute as a chain
if C::has_chain(¤t) {
match C::do_chain(current) {
ChainProcess::Ok((any, Next::Renderer)) => {
return Ok(render::<C>(program, any));
}
ChainProcess::Ok((any, Next::Chain)) => any,
ChainProcess::Err(e) => return Err(e.into()),
}
}
// If no chain exists, attempt to render
else if C::has_renderer(¤t) {
return Ok(render::<C>(program, current));
}
// No renderer exists
else {
stop_next = true;
C::build_renderer_not_found(current.member_id)
}
};
if final_exec && stop_next {
break;
}
}
Ok(RenderResult::default())
}
/// Dynamically dispatch input arguments to registered entry types
pub(crate) fn dispatch_args_dynamic<C>(
program: &'static Program<C>,
args: &Vec<String>,
) -> Result<AnyOutput<C>, ProgramInternalExecuteError>
where
C: ProgramCollect<Enum = C>,
{
let next = match match_user_input(program, args) {
Ok((dispatcher, args)) => {
// Entry point
match dispatcher.begin(args) {
ChainProcess::Ok((any, _)) => any,
ChainProcess::Err(e) => return Err(e.into()),
}
}
Err(ProgramInternalExecuteError::DispatcherNotFound) => {
// No matching Dispatcher is found
C::build_dispatcher_not_found(program.args.clone())
}
Err(e) => return Err(e),
};
Ok(next)
}
/// Match user input against registered dispatchers and return the matched dispatcher and remaining arguments.
#[allow(clippy::type_complexity)]
#[allow(clippy::ptr_arg)]
pub(crate) fn match_user_input<C>(
program: &'static Program<C>,
args: &Vec<String>,
) -> Result<(&'static (dyn Dispatcher<C> + Send + Sync), Vec<String>), ProgramInternalExecuteError>
where
C: ProgramCollect<Enum = C>,
{
let nodes = program.get_nodes();
let command = format!("{} ", args.join(" "));
// Find all nodes that match the command prefix
let matching_nodes: Vec<&(String, &(dyn Dispatcher<C> + Send + Sync))> = nodes
.iter()
// Also add a space to the node string to ensure consistent matching logic
.filter(|(node_str, _)| command.starts_with(&format!("{} ", node_str)))
.collect();
match matching_nodes.len() {
0 => {
// No matching node found
Err(ProgramInternalExecuteError::DispatcherNotFound)
}
1 => {
let matched_prefix = matching_nodes[0];
let prefix_len = matched_prefix.0.split_whitespace().count();
let trimmed_args: Vec<String> = args.iter().skip(prefix_len).cloned().collect();
Ok((matched_prefix.1, trimmed_args))
}
_ => {
// Multiple matching nodes found
// Find the node with the longest length (most specific match)
let matched_prefix = matching_nodes
.iter()
.max_by_key(|node| node.0.len())
.unwrap();
let prefix_len = matched_prefix.0.split_whitespace().count();
let trimmed_args: Vec<String> = args.iter().skip(prefix_len).cloned().collect();
Ok((matched_prefix.1, trimmed_args))
}
}
}
#[inline(always)]
#[allow(unused_variables)]
fn render<C: ProgramCollect<Enum = C>>(program: &Program<C>, any: AnyOutput<C>) -> RenderResult {
#[cfg(not(feature = "general_renderer"))]
{
let mut render_result = RenderResult::default();
C::render(any, &mut render_result);
render_result
}
#[cfg(feature = "general_renderer")]
{
match program.general_renderer_name {
super::GeneralRendererSetting::Disable => {
let mut render_result = RenderResult::default();
C::render(any, &mut render_result);
render_result
}
_ => C::general_render(any, &program.general_renderer_name).unwrap(),
}
}
}
#[inline(always)]
#[allow(unused_variables)]
fn render_help<C: ProgramCollect<Enum = C>>(
program: &Program<C>,
entry: AnyOutput<C>,
) -> RenderResult {
#[cfg(not(feature = "general_renderer"))]
{
let mut render_result = RenderResult::default();
C::render_help(entry, &mut render_result);
render_result
}
#[cfg(feature = "general_renderer")]
{
match program.general_renderer_name {
super::GeneralRendererSetting::Disable => {
let mut render_result = RenderResult::default();
C::render_help(entry, &mut render_result);
render_result
}
_ => RenderResult::default(),
}
}
}
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