feat: implement dfguide-registrar project with Postgres user registration functionality

src/main.rs

@@ -0,0 +1,52 @@
+mod config;
+mod db;
+mod validation;
+
+use anyhow::Result;
+use dialoguer::{Input, Password, theme::ColorfulTheme};
+use dotenvy::dotenv;
+
+use crate::db::RegistrationInput;
+
+#[tokio::main]
+async fn main() -> Result<()> {
+    dotenv().ok();
+
+    let config = config::AppConfig::from_env()?;
+    let pool = db::connect(&config).await?;
+
+    println!("Delta Force Guide 用户注册");
+    println!("请依次输入用户名、邮箱和密码。\n");
+
+    let registration = prompt_registration()?;
+    let user_id = db::register_local_user(&pool, registration).await?;
+
+    println!("\n注册成功，user_id = {user_id}");
+    Ok(())
+}
+
+fn prompt_registration() -> Result<RegistrationInput> {
+    let theme = ColorfulTheme::default();
+
+    let username = Input::<String>::with_theme(&theme)
+        .with_prompt("用户名")
+        .validate_with(|input: &String| validation::validate_username(input).map_err(str::to_owned))
+        .interact_text()?;
+
+    let email = Input::<String>::with_theme(&theme)
+        .with_prompt("电子邮箱")
+        .validate_with(|input: &String| validation::validate_email(input).map_err(str::to_owned))
+        .interact_text()?;
+
+    let password = Password::with_theme(&theme)
+        .with_prompt("密码")
+        .with_confirmation("再次输入密码", "两次输入的密码不一致")
+        .validate_with(|input: &String| validation::validate_password(input).map_err(str::to_owned))
+        .interact()?;
+
+    Ok(RegistrationInput {
+        username: validation::normalize_username(&username)?,
+        email: validation::normalize_email(&email)?,
+        password,
+    })
+}