Added foundational modules for core functionalities:

- Introduced `walk.rs` as a parallel directory walker for search operations.
- Implemented basic index handling in `commands/index.rs`.
- Created `utils/config.rs` for configuration management with placeholders for future enhancements.

src/commands/clean.rs

@@ -0,0 +1,37 @@
+use std::{env, fs};
+use crate::utils::get_project_info;
+
+pub fn handle(
+    project: Option<String>,
+    all: bool,
+    config_dir: &std::path::Path,
+) -> Result<(), Box<dyn std::error::Error>> {
+    if all {
+        println!("Cleaning all indexes...");
+        if config_dir.exists() {
+            fs::remove_dir_all(config_dir)?;
+            fs::create_dir_all(config_dir)?;
+        }
+        println!("All indexes cleaned.");
+    } else if let Some(proj_name) = project {
+        let db_path = config_dir.join(format!("{}.sqlite", proj_name));
+        if db_path.exists() {
+            fs::remove_file(&db_path)?;
+            println!("Cleaned index for: {}", proj_name);
+        } else {
+            println!("No index found for: {}", proj_name);
+        }
+    } else {
+        let current_dir = env::current_dir()?;
+        let (project_name, db_path) = get_project_info(&current_dir, config_dir)?;
+
+        if db_path.exists() {
+            fs::remove_file(&db_path)?;
+            println!("Cleaned index for: {}", project_name);
+        } else {
+            println!("No index found for current project: {}", project_name);
+        }
+    }
+
+    Ok(())
+}

src/commands/index.rs

@@ -0,0 +1,48 @@
+use std::fs;
+use crate::cli::IndexAction;
+use crate::utils::project::get_project_info;
+
+pub fn handle(
+    action: IndexAction,
+    database_dir: &std::path::Path,
+) -> Result<(), Box<dyn std::error::Error>> {
+    match action {
+        IndexAction::Build { path, force } => {
+            let build_path = std::path::Path::new(&path).canonicalize()?;
+            let (project_name, db_path) = get_project_info(&build_path, database_dir)?;
+
+            if force || !db_path.exists() {
+                println!("Building index for: {}", project_name);
+                build_index(&build_path, &db_path)?;
+                println!("Index built: {}", db_path.display());
+            } else {
+                println!("Index already exists. Use --force to rebuild.");
+            }
+        }
+        IndexAction::Status { path } => {
+            let status_path = std::path::Path::new(&path).canonicalize()?;
+            let (project_name, db_path) = get_project_info(&status_path, database_dir)?;
+
+            println!("Project: {}", project_name);
+            println!("Index path: {}", db_path.display());
+            println!("Index exists: {}", db_path.exists());
+
+            if db_path.exists() {
+                let metadata = fs::metadata(&db_path)?;
+                println!("Index size: {} bytes", metadata.len());
+                println!("Last modified: {:?}", metadata.modified()?);
+            }
+        }
+    }
+    Ok(())
+}
+
+pub fn build_index(
+    _project_path: &std::path::Path,
+    db_path: &std::path::Path,
+) -> Result<(), Box<dyn std::error::Error>> {
+    // TODO: Implement actual index building
+    fs::File::create(db_path)?;
+    println!("Index building logic goes here...");
+    Ok(())
+}

src/commands/list.rs

@@ -0,0 +1,35 @@
+use std::fs;
+
+pub fn handle(
+    verbose: bool,
+    database_dir: &std::path::Path,
+) -> Result<(), Box<dyn std::error::Error>> {
+    println!("Indexed projects:");
+
+    if database_dir.exists() {
+        for entry in fs::read_dir(database_dir)? {
+            let entry = entry?;
+            let path = entry.path();
+
+            if path.extension().and_then(|s| s.to_str()) == Some("sqlite") {
+                let project_name = path
+                    .file_stem()
+                    .and_then(|s| s.to_str())
+                    .unwrap_or("unknown");
+
+                println!("  {}", project_name);
+
+                if verbose {
+                    let metadata = fs::metadata(&path)?;
+                    println!("    Path: {}", path.display());
+                    println!("    Size: {} bytes", metadata.len());
+                    println!("    Modified: {:?}", metadata.modified()?);
+                }
+            }
+        }
+    } else {
+        println!("  No indexed projects found.");
+    }
+
+    Ok(())
+}

src/commands/mod.rs

@@ -0,0 +1,29 @@
+pub mod scan;
+pub mod index;
+pub mod list;
+pub mod clean;
+
+use crate::cli::Commands;
+use std::path::Path;
+use crate::utils::config::Config;
+
+pub fn handle_command(
+    command: Commands,
+    database_dir: &Path,
+    config: &Config
+) -> Result<(), Box<dyn std::error::Error>> {
+    match command {
+        Commands::Scan { path, no_index, rebuild_index, format, high_only } => {
+            scan::handle(&path, no_index, rebuild_index, format, high_only, database_dir, config)
+        }
+        Commands::Index { action } => {
+            index::handle(action, database_dir)
+        }
+        Commands::List { verbose } => {
+            list::handle(verbose, database_dir)
+        }
+        Commands::Clean { project, all } => {
+            clean::handle(project, all, database_dir)
+        }
+    }
+}

src/commands/scan.rs

@@ -0,0 +1,53 @@
+use crate::cli::OutputFormat;
+use crate::utils::project::get_project_info;
+use std::path::Path;
+use crate::utils::config::Config;
+
+pub fn handle(
+    path: &str,
+    no_index: bool,
+    rebuild_index: bool,
+    format: OutputFormat,
+    high_only: bool,
+    database_dir: &Path,
+    config: &Config,
+) -> Result<(), Box<dyn std::error::Error>> {
+    let scan_path = Path::new(path).canonicalize()?;
+    let (project_name, db_path) = get_project_info(&scan_path, database_dir)?;
+
+    tracing::info!("Config: {:?}", config);
+    tracing::info!("Scanning project: {}", project_name);
+    tracing::info!("Scan path: {}", scan_path.display());
+
+    if no_index {
+        tracing::info!("Scanning without index...");
+        scan_filesystem(&scan_path)?;
+    } else {
+        if rebuild_index || !db_path.exists() {
+            tracing::info!("Building/updating index...");
+            crate::commands::index::build_index(&scan_path, &db_path)?;
+        }
+
+        tracing::info!("Using index: {}", db_path.display());
+        scan_with_index(&db_path)?;
+    }
+
+    tracing::info!("Output format: {:?}", format);
+    if high_only {
+        tracing::info!("Filtering: High severity only");
+    }
+
+    Ok(())
+}
+
+fn scan_filesystem(path: &Path) -> Result<(), Box<dyn std::error::Error>> {
+    // TODO: Implement direct filesystem scanning
+    tracing::info!("Direct filesystem scan of: {}", path.display());
+    Ok(())
+}
+
+fn scan_with_index(db_path: &Path) -> Result<(), Box<dyn std::error::Error>> {
+    // TODO: Implement index-based scanning
+    tracing::info!("Index-based scan using: {}", db_path.display());
+    Ok(())
+}