commit 84db221f96e8d8a3116db468970747b95f27d8d6
Author: Dmitry <b4tm4n@mail.ru>
Date:   Mon Apr 17 12:09:26 2023 +0300

    initial commit

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new file mode 100644
index 0000000..8a1e39d
--- /dev/null
+++ b/laika.toml
@@ -0,0 +1,7 @@
+command = "calc.exe"
+target = "CalculatorApp.exe"
+workdir = "."
+delay = 2
+start = { hour = 11, minute = 50 }
+end = { hour = 12, minute = 55 }
+
diff --git a/src/main.rs b/src/main.rs
new file mode 100644
index 0000000..6e3610d
--- /dev/null
+++ b/src/main.rs
@@ -0,0 +1,127 @@
+//#![windows_subsystem = "windows"]
+
+use chrono::prelude::*;
+use chrono::{DateTime, Local, TimeZone};
+use serde::Deserialize;
+use std::path::Path;
+use std::{thread, time::Duration};
+use sysinfo::{System, SystemExt};
+
+use std::{env, fs, path::PathBuf, process::Command};
+
+#[derive(Deserialize, Default, PartialEq, Eq, PartialOrd, Ord, Copy, Clone, Debug)]
+struct TimeHM {
+    hour: u8,
+    minute: u8,
+}
+
+impl<Tz: TimeZone> From<DateTime<Tz>> for TimeHM {
+    fn from(value: DateTime<Tz>) -> TimeHM {
+        TimeHM {
+            hour: value.hour() as u8,
+            minute: value.minute() as u8,
+        }
+    }
+}
+
+#[derive(Deserialize, Default)]
+struct Config {
+    command: String,
+    target: String,
+    workdir: String,
+    args: Option<Vec<String>>,
+    start: TimeHM,
+    end: TimeHM,
+    delay: u32,
+}
+
+impl Config {
+    fn read<P: AsRef<Path>>(path: P) -> Result<Self, String> {
+        let data = fs::read_to_string(path).map_err(|e| format!("can't read config: {:?}", e))?;
+        toml::from_str(&data).map_err(|e| format!("can't parse config: {:?}", e))
+    }
+    fn file_location() -> Result<PathBuf, String> {
+        let res = env::current_exe()
+            .map_err(|e| format!("can't get current exe path: {:?}", e))?
+            .with_extension("toml");
+        Ok(res)
+    }
+    fn get() -> Self {
+        let path = Config::file_location();
+        if let Err(_e) = path {
+            //println!("{}", _e);
+            return Config::default();
+        }
+
+        let path = path.unwrap();
+        let cfg = Config::read(path);
+        match cfg {
+            Err(_e) => {
+                //println!("{}", _e);
+                Config::default()
+            }
+            Ok(cfg) => cfg,
+        }
+    }
+    fn target_name(&self) -> String {
+        if !self.target.is_empty() {
+            self.target.clone()
+        } else {
+            PathBuf::from(self.command.clone())
+                .file_name()
+                .unwrap()
+                .to_os_string()
+                .into_string()
+                .unwrap()
+        }
+    }
+    fn is_in_time(&self, value: TimeHM) -> bool {
+        dbg!(value);
+        dbg!(self.start <= value && value <= self.end);
+        self.start <= value && value <= self.end
+    }
+    fn is_active(&self) -> bool {
+        let now: DateTime<Local> = Local::now();
+        self.is_in_time(now.into())
+    }
+    fn sleep(&self) {
+        thread::sleep(Duration::from_secs(self.delay.into()));
+    }
+    fn is_target_alive(&self) -> bool {
+        let name = self.target_name();
+        dbg!(&name);
+        let sp = System::new_all();
+        let procs = sp.processes_by_exact_name(&name);
+        let count = procs.count();
+        dbg!(count);
+        count > 0
+    }
+    fn relaunch_target(&self) {
+        dbg!(&self.command);
+        let mut cmd = Command::new(&self.command);
+        cmd.current_dir(&self.workdir);
+        if let Some(args) = &self.args {
+            cmd.args(args);
+        }
+        let _res = cmd.spawn();
+    }
+    fn is_valid(&self) -> bool {
+        (!self.command.is_empty()) && self.delay > 0
+    }
+    fn main_loop(self) {
+        dbg!(self.is_valid());
+        if !self.is_valid() {
+            return;
+        }
+        loop {
+            if self.is_active() && !self.is_target_alive() {
+                self.relaunch_target();
+            }
+            self.sleep();
+        }
+    }
+}
+
+fn main() {
+    Config::get().main_loop()
+}