feat: finish exec runner

wfassoc-exec/src/runner.rs

@@ -1,7 +1,10 @@
 use crate::cli;
 use crate::manifest;
+use comfy_table::Table;
+use std::collections::{HashMap, HashSet};
 use std::path::Path;
 use thiserror::Error as TeError;
+use toml;
 
 // region: Error Handling
 
@@ -20,6 +23,19 @@ pub enum Error {
     /// Error when operating Program.
     #[error("{0}")]
     Program(#[from] wfassoc::highlevel::ProgramError),
+    /// Error when serializing TOML
+    #[error("{0}")]
+    SerializeToml(#[from] toml::ser::Error),
+
+    /// Find duplicated name when converting extension name to index
+    #[error("given extension name {0} has been specified more than one time")]
+    DupExtName(String),
+    /// Find invalid name when converting extension name to index
+    #[error("given extension name {0} is not presented in application")]
+    BadExtName(String),
+    /// Find star (*) extension name with other extension names when converting extension name to index
+    #[error("given extension name {0} is not presented in application")]
+    ExclusiveStarExtName(String),
 }
 
 /// Result type used in this module.
@@ -27,13 +43,38 @@ type Result<T> = std::result::Result<T, Error>;
 
 // endregion
 
-// region: Utilities Functions
+// region: Utilities
 
 fn stringified_exts_to_indices(
     program: &wfassoc::Program,
     exts: Vec<String>,
 ) -> Result<Vec<usize>> {
-    todo!()
+    // Check for duplicate extension names
+    let mut seen = HashSet::new();
+    for ext in &exts {
+        if !seen.insert(ext.as_str()) {
+            return Err(Error::DupExtName(ext.clone()));
+        }
+    }
+
+    // Check for star (*) with other extensions
+    let has_star = exts.iter().any(|ext| ext == "*");
+    if has_star && exts.len() > 1 {
+        return Err(Error::ExclusiveStarExtName("*".to_string()));
+    }
+
+    // If star is present alone, return fixed list from zero to the maximum ext index.
+    if has_star {
+        return Ok((0..program.get_ext_count()).collect());
+    }
+
+    // Convert each extension name to index using program.find_ext()
+    let indices = exts
+        .into_iter()
+        .map(|ext| program.find_ext(&ext).ok_or(Error::BadExtName(ext)))
+        .collect::<Result<Vec<_>>>()?;
+
+    Ok(indices)
 }
 
 // endregion
@@ -87,7 +128,31 @@ fn run_ext_list(
     view: wfassoc::View,
     style: cli::ExtListStyle,
 ) -> Result<()> {
-    todo!()
+    // Fetch info
+    let mut ext_list: HashMap<String, Option<String>> = HashMap::new();
+    for index in 0..program.get_ext_count() {
+        let ext = program.get_ext(index)?;
+        let status = program.query_ext(view, index)?;
+        ext_list.insert(ext.dotted_inner(), status.map(|s| s.get_name().to_string()));
+    }
+
+    // Output by styles
+    use cli::ExtListStyle;
+    match style {
+        ExtListStyle::Human => {
+            let mut table = Table::new();
+            table.set_header(["Extension", "Association"]);
+            for (k, v) in ext_list {
+                table.add_row([k, v.unwrap_or("".to_string())]);
+            }
+            println!("{table}");
+        }
+        ExtListStyle::Machine => {
+            let stoml = toml::to_string(&ext_list)?;
+            println!("{stoml}")
+        }
+    }
+    Ok(())
 }
 
 // endregion