refactor: moved docker out of controller module

src/controller/utils.rs

@@ -0,0 +1,29 @@
+use miette::Result;
+use rand::{Rng, distr::Alphanumeric};
+const DEFAULT_POSTGRES_PORT: u16 = 5432;
+const PORT_SEARCH_RANGE: u16 = 100;
+
+pub fn find_available_port() -> Result<u16> {
+    use std::net::TcpListener;
+
+    for port in DEFAULT_POSTGRES_PORT..(DEFAULT_POSTGRES_PORT + PORT_SEARCH_RANGE) {
+        if TcpListener::bind(("127.0.0.1", port)).is_ok() {
+            return Ok(port);
+        }
+    }
+
+    miette::bail!(
+        "No available ports found in range {}-{}",
+        DEFAULT_POSTGRES_PORT,
+        DEFAULT_POSTGRES_PORT + PORT_SEARCH_RANGE - 1
+    )
+}
+
+const PASSWORD_LENGTH: usize = 16;
+pub fn generate_password() -> String {
+    (&mut rand::rng())
+        .sample_iter(Alphanumeric)
+        .take(PASSWORD_LENGTH)
+        .map(|b| b as char)
+        .collect()
+}