1 files changed, 130 insertions, 0 deletions
diff --git a/mingling/src/program/exec.rs b/mingling/src/program/exec.rs
new file mode 100644
index 0000000..99eb419
--- /dev/null
+++ b/mingling/src/program/exec.rs
@@ -0,0 +1,130 @@
+use crate::{
+    AnyOutput, ChainProcess, Dispatcher, Program, ProgramCollect, RenderResult,
+    error::{ChainProcessError, ProgramInternalExecuteError},
+    hint::{DispatcherNotFound, NoChainFound, ProgramEnd},
+};
+
+pub mod error;
+
+pub async fn exec<C: ProgramCollect>(
+    program: Program<C>,
+) -> Result<RenderResult, ProgramInternalExecuteError> {
+    // Match user input
+    let matched: (Box<dyn Dispatcher>, Vec<String>) = match match_user_input(&program) {
+        Ok(r) => (r.0.clone(), r.1),
+        Err(ProgramInternalExecuteError::DispatcherNotFound) => {
+            // If no Dispatcher is found, dispatch to the DispatcherNotFound Dispatcher
+            // to route it to the NoDispatcherFound struct
+            let disp: Box<dyn Dispatcher> = Box::new(DispatcherNotFound);
+            (disp, program.args)
+        }
+        Err(e) => return Err(e),
+    };
+
+    // Entry point
+    let (dispatcher, args) = matched;
+    let mut current = match handle_chain_process::<C>(dispatcher.begin(args)) {
+        Ok(Next::RenderResult(render_result)) => return Ok(render_result),
+        Ok(Next::AnyOutput(any)) => any,
+        Err(e) => return Err(e),
+    };
+
+    loop {
+        current = match handle_chain_process::<C>(C::do_chain(current).await) {
+            Ok(Next::RenderResult(render_result)) => return Ok(render_result),
+            Ok(Next::AnyOutput(any)) => any,
+            Err(e) => return Err(e),
+        };
+        if current.is::<ProgramEnd>() || current.is::<NoChainFound>() {
+            break;
+        }
+    }
+
+    Ok(RenderResult::default())
+}
+
+/// Match user input against registered dispatchers and return the matched dispatcher and remaining arguments.
+fn match_user_input<C: ProgramCollect>(
+    program: &Program<C>,
+) -> Result<(&Box<dyn Dispatcher>, Vec<String>), ProgramInternalExecuteError> {
+    let nodes = get_nodes(&program);
+    let command = format!("{} ", program.args.join(" "));
+
+    // Find all nodes that match the command prefix
+    let matching_nodes: Vec<&(String, &Box<dyn Dispatcher>)> = 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> = program.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> = program.args.iter().skip(prefix_len).cloned().collect();
+            Ok((matched_prefix.1, trimmed_args))
+        }
+    }
+}
+
+#[inline(always)]
+fn render<C: ProgramCollect>(any: AnyOutput) -> RenderResult {
+    let mut render_result = RenderResult::default();
+    C::render(any, &mut render_result);
+    render_result
+}
+
+fn handle_chain_process<C: ProgramCollect>(
+    process: ChainProcess,
+) -> Result<Next, ProgramInternalExecuteError> {
+    match process {
+        Ok(any) => Ok(Next::AnyOutput(any)),
+        Err(e) => match e {
+            ChainProcessError::Broken(any_output) => {
+                let render_result = render::<C>(any_output);
+                return Ok(Next::RenderResult(render_result));
+            }
+            _ => {
+                return Err(e.into());
+            }
+        },
+    }
+}
+
+// Get all registered dispatcher names from the program
+fn get_nodes<C: ProgramCollect>(program: &Program<C>) -> Vec<(String, &Box<dyn Dispatcher>)> {
+    program
+        .dispatcher
+        .iter()
+        .map(|disp| {
+            let node_str = disp
+                .node()
+                .to_string()
+                .split('.')
+                .collect::<Vec<_>>()
+                .join(" ");
+            (node_str, disp)
+        })
+        .collect()
+}
+
+enum Next {
+    RenderResult(RenderResult),
+    AnyOutput(AnyOutput),
+}