Add auto-detection of input device + write directly to haptics

Cargo.lock

@@ -2,6 +2,15 @@
 # It is not intended for manual editing.
 version = 4
 
+[[package]]
+name = "aho-corasick"
+version = "1.1.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ddd31a130427c27518df266943a5308ed92d4b226cc639f5a8f1002816174301"
+dependencies = [
+ "memchr",
+]
+
 [[package]]
 name = "anstream"
 version = "1.0.0"
@@ -164,6 +173,7 @@ version = "0.2.0"
 dependencies = [
  "clap",
  "evdev",
+ "regex",
 ]
 
 [[package]]
@@ -172,6 +182,12 @@ version = "0.2.184"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "48f5d2a454e16a5ea0f4ced81bd44e4cfc7bd3a507b61887c99fd3538b28e4af"
 
+[[package]]
+name = "memchr"
+version = "2.8.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f8ca58f447f06ed17d5fc4043ce1b10dd205e060fb3ce5b979b8ed8e59ff3f79"
+
 [[package]]
 name = "nix"
 version = "0.29.0"
@@ -214,6 +230,35 @@ version = "0.7.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "dc33ff2d4973d518d823d61aa239014831e521c75da58e3df4840d3f47749d09"
 
+[[package]]
+name = "regex"
+version = "1.12.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e10754a14b9137dd7b1e3e5b0493cc9171fdd105e0ab477f51b72e7f3ac0e276"
+dependencies = [
+ "aho-corasick",
+ "memchr",
+ "regex-automata",
+ "regex-syntax",
+]
+
+[[package]]
+name = "regex-automata"
+version = "0.4.14"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6e1dd4122fc1595e8162618945476892eefca7b88c52820e74af6262213cae8f"
+dependencies = [
+ "aho-corasick",
+ "memchr",
+ "regex-syntax",
+]
+
+[[package]]
+name = "regex-syntax"
+version = "0.8.10"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "dc897dd8d9e8bd1ed8cdad82b5966c3e0ecae09fb1907d58efaa013543185d0a"
+
 [[package]]
 name = "strsim"
 version = "0.11.1"

Cargo.toml

@@ -9,6 +9,7 @@ description = "time to have fun with your cosmo communicator"
 [dependencies]
 clap = { version = "4.6.0", features = ["derive"] }
 evdev = "0.13.2"
+regex = "1.12.3"
 
 [package.metadata.deb]
 changelog = "debian/changelog"

src/main.rs

@@ -1,33 +1,48 @@
-use std::{path::PathBuf, process::exit};
-
+use std::{path::{Path, PathBuf}, fs::{File, OpenOptions}, process::exit};
+use std::io::{Read, Write};
 use clap::Parser;
+use regex::Regex;
 use evdev::*;
 
+const DEVICES_PATH: &str = "/proc/bus/input/devices";
+const HAPTIC_PATH: &str = "/sys/class/timed_output/vibrator/enable";
+
 #[derive(Parser, Debug)]
 #[command(version, about, long_about = None)]
 struct Args {
-    /// keyboard device
-    #[arg(short, long)]
-    device: PathBuf,
-
     /// vibration duration in milliseconds
-    #[arg(short, long, default_value_t = 100)]
+    #[arg(short, long, default_value_t = 50)]
     length: usize,
 }
 
 fn main() {
     let cli = Args::parse();
 
-    if !cli.device.exists() {
-        eprintln!("event device does not exist");
-        exit(1)
-    }
+    let mut haptic = OpenOptions::new()
+        .append(true)
+        .open(HAPTIC_PATH)
+        .expect(&format!("Unable to access haptic drivers at {} for writing!", HAPTIC_PATH));
 
-    let mut device = Device::open(cli.device).unwrap();
+    let devices_list: String = {
+        let mut str = String::new();
+        
+        File::open(Path::new(DEVICES_PATH)).expect(&format!("Unable to open {} to read devices list!", DEVICES_PATH))
+            .read_to_string(&mut str).expect(&format!("Unable to read devices list at {}!", DEVICES_PATH));
+        
+        str
+    };
+    let kbd_regex = Regex::new(r"(?ms)Integrated keyboard(.*?)kbd (?<event>.*?) \n").unwrap();
+    let event_num = &kbd_regex.captures(&devices_list).expect(&format!("No valid keyboard devices found in {}", DEVICES_PATH))["event"];
+
+    let device_path = format!("/dev/input/{}", event_num);
+    let mut device = Device::open(Path::new(&device_path)).expect(&format!("Unable to open device at {}", &device_path));
     loop {
         for event in device.fetch_events().unwrap() {
             if let EventSummary::Key(_, _, 1) = event.destructure() {
-                println!("{}", cli.length);
+                match write!(haptic, "{}", cli.length) {
+                    Err(_) => println!("Unable to write to haptics!"),
+                    _ => ()
+                };
             }
         }
     }