proc_cli/commands/

by.rs

//! `proc by` - Filter processes by name
//!
//! Examples:
//!   proc by node               # Processes named 'node'
//!   proc by node --in .        # Node processes in current directory
//!   proc by node --min-cpu 5   # Node processes using >5% CPU
//!   proc by "my app"           # Processes with spaces in name

use crate::core::{Process, ProcessStatus};
use crate::error::Result;
use crate::ui::{OutputFormat, Printer};
use clap::Args;
use std::path::PathBuf;

/// Filter processes by name
#[derive(Args, Debug)]
pub struct ByCommand {
    /// Process name or pattern to match
    pub name: String,

    /// Filter by directory (defaults to current directory if no path given)
    #[arg(long = "in", short = 'i', num_args = 0..=1, default_missing_value = ".")]
    pub in_dir: Option<String>,

    /// Filter by executable path
    #[arg(long, short = 'p')]
    pub path: Option<String>,

    /// Only show processes using more than this CPU %
    #[arg(long)]
    pub min_cpu: Option<f32>,

    /// Only show processes using more than this memory (MB)
    #[arg(long)]
    pub min_mem: Option<f64>,

    /// Filter by status: running, sleeping, stopped, zombie
    #[arg(long)]
    pub status: Option<String>,

    /// Output as JSON
    #[arg(long, short = 'j')]
    pub json: bool,

    /// Show verbose output with command line, cwd, and parent PID
    #[arg(long, short = 'v')]
    pub verbose: bool,

    /// Limit the number of results
    #[arg(long, short = 'n')]
    pub limit: Option<usize>,

    /// Sort by: cpu, mem, pid, name
    #[arg(long, short = 's', default_value = "cpu")]
    pub sort: String,
}

impl ByCommand {
    /// Executes the by command, listing processes matching the name filter.
    pub fn execute(&self) -> Result<()> {
        let format = if self.json {
            OutputFormat::Json
        } else {
            OutputFormat::Human
        };
        let printer = Printer::new(format, self.verbose);

        // Get processes by name
        let mut processes = Process::find_by_name(&self.name)?;

        // Resolve --in filter path
        let in_dir_filter: Option<PathBuf> = self.in_dir.as_ref().map(|p| {
            if p == "." {
                std::env::current_dir().unwrap_or_else(|_| PathBuf::from("."))
            } else {
                let path = PathBuf::from(p);
                if path.is_relative() {
                    std::env::current_dir()
                        .unwrap_or_else(|_| PathBuf::from("."))
                        .join(path)
                } else {
                    path
                }
            }
        });

        // Resolve path filter
        let path_filter: Option<PathBuf> = self.path.as_ref().map(|p| {
            let path = PathBuf::from(p);
            if path.is_relative() {
                std::env::current_dir()
                    .unwrap_or_else(|_| PathBuf::from("."))
                    .join(path)
            } else {
                path
            }
        });

        // Apply filters
        processes.retain(|p| {
            // Directory filter (--in)
            if let Some(ref dir_path) = in_dir_filter {
                if let Some(ref proc_cwd) = p.cwd {
                    let proc_path = PathBuf::from(proc_cwd);
                    if !proc_path.starts_with(dir_path) {
                        return false;
                    }
                } else {
                    return false;
                }
            }

            // Path filter (executable path)
            if let Some(ref exe_path) = path_filter {
                if let Some(ref proc_exe) = p.exe_path {
                    let proc_path = PathBuf::from(proc_exe);
                    if !proc_path.starts_with(exe_path) {
                        return false;
                    }
                } else {
                    return false;
                }
            }

            // CPU filter
            if let Some(min_cpu) = self.min_cpu {
                if p.cpu_percent < min_cpu {
                    return false;
                }
            }

            // Memory filter
            if let Some(min_mem) = self.min_mem {
                if p.memory_mb < min_mem {
                    return false;
                }
            }

            // Status filter
            if let Some(ref status) = self.status {
                let status_match = match status.to_lowercase().as_str() {
                    "running" => matches!(p.status, ProcessStatus::Running),
                    "sleeping" | "sleep" => matches!(p.status, ProcessStatus::Sleeping),
                    "stopped" | "stop" => matches!(p.status, ProcessStatus::Stopped),
                    "zombie" => matches!(p.status, ProcessStatus::Zombie),
                    _ => true,
                };
                if !status_match {
                    return false;
                }
            }

            true
        });

        // Sort processes
        match self.sort.to_lowercase().as_str() {
            "cpu" => processes.sort_by(|a, b| {
                b.cpu_percent
                    .partial_cmp(&a.cpu_percent)
                    .unwrap_or(std::cmp::Ordering::Equal)
            }),
            "mem" | "memory" => processes.sort_by(|a, b| {
                b.memory_mb
                    .partial_cmp(&a.memory_mb)
                    .unwrap_or(std::cmp::Ordering::Equal)
            }),
            "pid" => processes.sort_by_key(|p| p.pid),
            "name" => processes.sort_by(|a, b| a.name.to_lowercase().cmp(&b.name.to_lowercase())),
            _ => {} // Keep default order
        }

        // Apply limit if specified
        if let Some(limit) = self.limit {
            processes.truncate(limit);
        }

        // Build context string for output
        let mut context_parts = vec![format!("by '{}'", self.name)];
        if let Some(ref dir) = in_dir_filter {
            context_parts.push(format!("in {}", dir.display()));
        }
        let context = Some(context_parts.join(" "));

        printer.print_processes_with_context(&processes, context.as_deref());
        Ok(())
    }
}