Add simulation command to justfile for container execution

.gitignore

@@ -0,0 +1,23 @@
+target/
+
+# Generated by Cargo
+# will have compiled files and executables
+debug
+target
+
+# These are backup files generated by rustfmt
+**/*.rs.bk
+
+# MSVC Windows builds of rustc generate these, which store debugging information
+*.pdb
+
+# Generated by cargo mutants
+# Contains mutation testing data
+**/mutants.out*/
+
+# RustRover
+#  JetBrains specific template is maintained in a separate JetBrains.gitignore that can
+#  be found at https://github.com/github/gitignore/blob/main/Global/JetBrains.gitignore
+#  and can be added to the global gitignore or merged into this file.  For a more nuclear
+#  option (not recommended) you can uncomment the following to ignore the entire idea folder.
+#.idea/

Cargo.toml

@@ -0,0 +1,9 @@
+[workspace]
+members = [ 
+    "apps/container",
+]
+
+resolver = "3"
+
+[workspace.lints.clippy]
+module_inception = "allow"

apps/container/.gitignore

@@ -0,0 +1 @@
+generated/

apps/container/Cargo.toml

@@ -0,0 +1,17 @@
+[package]
+name = "container-simulate"
+version = "0.1.0"
+edition = "2024"
+
+[lib]
+name = "container"
+path = "src/lib.rs"
+
+[dependencies]
+async-trait = "0.1.89"
+testcontainers = "0.24.0"
+shared = { path = "../../public/shared" }
+tokio = { version = "1.47.0", features = ["full"] }
+url = "2.5.7"
+clap = { version = "4.5.48", features = ["derive", "env"] }
+path-clean = "1.0.1"

apps/container/src/db.rs

@@ -0,0 +1,59 @@
+pub mod config;
+pub mod postgresql;
+pub mod sqlite;
+
+use async_trait::async_trait;
+use shared::db_type::DBType;
+use std::future::Future;
+use std::{pin::Pin, sync::Arc};
+use url::Host;
+
+use testcontainers::{ContainerAsync, GenericImage, TestcontainersError};
+
+use crate::{ConfigInfoType, WithContainer, WithoutContainer};
+
+pub type UnStartedContainer =
+    Pin<Box<dyn Future<Output = Result<ContainerAsync<GenericImage>, TestcontainersError>> + Send>>;
+
+pub type DBConfigInfoType = ConfigInfoType<ContainerizedDBInfo, PreExistingDBInfo>;
+
+#[derive(Clone)]
+pub struct PreExistingDBInfo {
+    pub db_type: DBType,
+    pub url: String,
+    pub on_delete: Arc<dyn Fn() + Send + Sync>,
+}
+
+impl WithoutContainer for PreExistingDBInfo {
+    fn on_delete(&self) {
+        (self.on_delete)();
+    }
+}
+
+#[derive(Clone)]
+pub struct ContainerizedDBInfo {
+    pub db_type: DBType,
+    pub container: Arc<ContainerAsync<GenericImage>>,
+    pub container_name: String,
+    pub database_name: String,
+    pub host: Host,
+    pub port: u16,
+    pub url: String,
+    pub user: String,
+    pub password: String,
+}
+
+impl WithContainer for ContainerizedDBInfo {
+    fn container(&self) -> &Arc<ContainerAsync<GenericImage>> {
+        &self.container
+    }
+}
+
+#[async_trait]
+pub trait DBInfo<T> {
+    async fn new(config: Option<T>) -> Self
+    where
+        Self: Sized;
+    async fn get_db_container_config_info(&self) -> DBConfigInfoType;
+    fn get_unstarted_container(&self) -> Result<UnStartedContainer, ()>;
+}

apps/container/src/db/config.rs

@@ -0,0 +1,53 @@
+pub struct OptionalContainerConfig {
+    pub image: Option<String>,
+    pub tag: Option<String>,
+    pub container_name: Option<String>,
+    pub database_name: Option<String>,
+    pub user: Option<String>,
+    pub password: Option<String>,
+}
+
+#[derive(Clone)]
+pub struct ContainerConfig {
+    pub image: String,
+    pub tag: String,
+    pub container_name: String,
+    pub database_name: String,
+    pub user: String,
+    pub password: String,
+}
+
+impl OptionalContainerConfig {
+    pub fn fill_with(&self, other: &ContainerConfig) -> ContainerConfig {
+        ContainerConfig {
+            image: self.image.clone().unwrap_or_else(|| other.image.clone()),
+            tag: self.tag.clone().unwrap_or_else(|| other.tag.clone()),
+            container_name: self
+                .container_name
+                .clone()
+                .unwrap_or_else(|| other.container_name.clone()),
+            database_name: self
+                .database_name
+                .clone()
+                .unwrap_or_else(|| other.database_name.clone()),
+            user: self.user.clone().unwrap_or_else(|| other.user.clone()),
+            password: self
+                .password
+                .clone()
+                .unwrap_or_else(|| other.password.clone()),
+        }
+    }
+}
+
+impl Default for OptionalContainerConfig {
+    fn default() -> Self {
+        Self {
+            image: None,
+            tag: None,
+            container_name: None,
+            database_name: None,
+            user: None,
+            password: None,
+        }
+    }
+}

apps/container/src/db/postgresql.rs

@@ -0,0 +1,95 @@
+use std::sync::Arc;
+
+use async_trait::async_trait;
+use testcontainers::{
+    GenericImage, ImageExt,
+    core::{IntoContainerPort, WaitFor},
+    runners::AsyncRunner,
+};
+
+use crate::{
+    ConfigInfoType,
+    db::{
+        ContainerizedDBInfo, DBConfigInfoType, DBInfo, UnStartedContainer,
+        config::{ContainerConfig, OptionalContainerConfig},
+    },
+};
+
+pub fn get_default_config() -> ContainerConfig {
+    ContainerConfig {
+        container_name: "yanpm-postgres".to_string(),
+        database_name: "postgres".to_string(),
+        user: "postgres".to_string(),
+        password: "postgres".to_string(),
+        image: "postgres".to_string(),
+        tag: "16-alpine".to_string(),
+    }
+}
+
+pub struct PostgreSQLContainer {
+    pub config: ContainerConfig,
+}
+
+#[async_trait]
+impl DBInfo<OptionalContainerConfig> for PostgreSQLContainer {
+    async fn get_db_container_config_info(&self) -> DBConfigInfoType {
+        let pg_container = self
+            .get_unstarted_container()
+            .unwrap()
+            .await
+            .expect("Failed to start PostgreSQL container");
+        let pg_host = pg_container.get_host().await.expect("Failed to get host");
+        let pg_host_port = pg_container
+            .get_host_port_ipv4(5432.tcp())
+            .await
+            .expect("Failed to get host port");
+        let pg_url = format!(
+            "postgres://{}:{}@{}:{}/{}",
+            self.config.user,
+            self.config.password,
+            pg_host,
+            pg_host_port,
+            self.config.database_name
+        );
+
+        ConfigInfoType::Containerized(ContainerizedDBInfo {
+            db_type: crate::db::DBType::PostgreSQL,
+            container: Arc::new(pg_container),
+            container_name: self.config.container_name.clone(),
+            database_name: self.config.database_name.clone(),
+            host: pg_host,
+            port: pg_host_port,
+            url: pg_url,
+            user: self.config.user.clone(),
+            password: self.config.password.clone(),
+        })
+    }
+
+    async fn new(user_default_config: Option<OptionalContainerConfig>) -> Self
+    where
+        Self: Sized,
+    {
+        let default_config = get_default_config();
+        let config = user_default_config
+            .unwrap_or_default()
+            .fill_with(&default_config);
+
+        PostgreSQLContainer {
+            config: config.clone(),
+        }
+    }
+
+    fn get_unstarted_container(&self) -> Result<UnStartedContainer, ()> {
+        Ok(
+            GenericImage::new(self.config.image.clone(), self.config.tag.clone())
+                .with_exposed_port(5432.tcp())
+                .with_wait_for(WaitFor::message_on_stderr(
+                    "database system is ready to accept connections",
+                ))
+                .with_container_name(self.config.container_name.clone())
+                .with_env_var("POSTGRES_USER", self.config.user.clone())
+                .with_env_var("POSTGRES_PASSWORD", self.config.password.clone())
+                .start(),
+        )
+    }
+}

apps/container/src/db/sqlite.rs

@@ -0,0 +1,113 @@
+use std::{path::PathBuf, sync::Arc};
+
+use async_trait::async_trait;
+
+use crate::{
+    ConfigInfoType,
+    db::{DBConfigInfoType, DBInfo, PreExistingDBInfo, UnStartedContainer},
+    util::to_absolute_path,
+};
+
+#[derive(Clone)]
+pub struct ContainerConfig {
+    // Add any SQLite-specific configuration options here if needed
+    pub database_name: String,
+    pub absolute_dir_path: PathBuf,
+}
+
+pub struct OptionalContainerConfig {
+    // Add any optional configuration fields here
+    pub database_name: Option<String>,
+    pub absolute_path: Option<PathBuf>,
+}
+
+impl OptionalContainerConfig {
+    pub fn fill_with(&self, other: &ContainerConfig) -> ContainerConfig {
+        ContainerConfig {
+            database_name: self
+                .database_name
+                .clone()
+                .unwrap_or_else(|| other.database_name.clone()),
+            absolute_dir_path: self
+                .absolute_path
+                .clone()
+                .unwrap_or_else(|| other.absolute_dir_path.clone()),
+        }
+    }
+}
+
+impl Default for OptionalContainerConfig {
+    fn default() -> Self {
+        Self {
+            database_name: None,
+            absolute_path: None,
+        }
+    }
+}
+
+pub fn get_default_config() -> ContainerConfig {
+    ContainerConfig {
+        database_name: "sqlite".to_string(),
+        absolute_dir_path: to_absolute_path("./generated/sqlite"),
+    }
+}
+
+pub struct SQLiteContainer {
+    pub config: ContainerConfig,
+}
+
+impl SQLiteContainer {
+    fn get_db_absolute_path(&self) -> PathBuf {
+        self.config
+            .absolute_dir_path
+            .join(&self.config.database_name)
+            .with_extension("db")
+    }
+}
+
+#[async_trait]
+impl DBInfo<OptionalContainerConfig> for SQLiteContainer {
+    async fn get_db_container_config_info(&self) -> DBConfigInfoType {
+        // sqlite filepath url does not include the "sqlite://" prefix
+        let sqlite_url = format!("{}", self.get_db_absolute_path().to_string_lossy());
+        // create the file
+        std::fs::create_dir_all(&self.config.absolute_dir_path)
+            .expect("Failed to create directories for SQLite database");
+        std::fs::File::create(self.get_db_absolute_path())
+            .expect("Failed to create SQLite database file");
+        //
+        ConfigInfoType::PreExisting(PreExistingDBInfo {
+            db_type: crate::db::DBType::SQLite,
+            url: sqlite_url,
+            on_delete: {
+                let db_path = self.get_db_absolute_path();
+                Arc::new(move || {
+                    // delete the sqlite database file
+                    if db_path.exists() {
+                        if let Err(e) = std::fs::remove_file(&db_path) {
+                            eprintln!("Failed to delete SQLite database file: {}", e);
+                        }
+                    }
+                })
+            },
+        })
+    }
+
+    async fn new(user_default_config: Option<OptionalContainerConfig>) -> Self
+    where
+        Self: Sized,
+    {
+        let default_config = get_default_config();
+        let config = user_default_config
+            .unwrap_or_default()
+            .fill_with(&default_config);
+
+        SQLiteContainer {
+            config: config.clone(),
+        }
+    }
+
+    fn get_unstarted_container(&self) -> Result<UnStartedContainer, ()> {
+        Err(())
+    }
+}

apps/container/src/env.rs

@@ -0,0 +1,36 @@
+use std::io::Write;
+
+use shared::db_type::DBType;
+
+#[derive(Clone, Copy)]
+pub enum EnvFileType {
+    DotEnv,
+    Yaml,
+}
+
+#[derive(Clone)]
+pub struct EnvFile {
+    pub file_type: EnvFileType,
+    pub db_type: DBType,
+    pub db_url: String,
+}
+
+impl EnvFile {
+    pub fn write(self, path: impl AsRef<std::path::Path>) {
+        let path_ref = path.as_ref();
+        println!("Config file path: {}", path_ref.display());
+        let mut config_file =
+            std::fs::File::create(path_ref).expect("Failed to create config file");
+        //
+        self._write_line(&mut config_file, "DB_TYPE", &self.db_type.to_string());
+        self._write_line(&mut config_file, "DATABASE_URL", &self.db_url.to_string())
+    }
+
+    fn _write_line(&self, file: &mut std::fs::File, key: &str, value: &str) {
+        match self.file_type {
+            EnvFileType::DotEnv => writeln!(file, "{}={}", key, value),
+            EnvFileType::Yaml => writeln!(file, "{}: \"{}\"", key, value),
+        }
+        .expect("Failed to write to config file");
+    }
+}

apps/container/src/lib.rs

@@ -0,0 +1,95 @@
+pub mod db;
+mod env;
+pub mod types;
+mod util;
+
+use crate::{
+    db::DBConfigInfoType,
+    types::{ConfigInfoType, WithContainer, WithoutContainer},
+    util::{
+        await_termination_signal, remove_file_if_exists, stop_container, to_absolute_path,
+        write_env_files,
+    },
+};
+
+#[derive(Clone)]
+pub struct Config {
+    pub database: DBConfigInfoType,
+}
+
+// relative to the pwd
+const API_CONFIG_PATH: &str = "../api/generated-config.yaml";
+const DB_CONFIG_PATH: &str = "../../public/database/.env.generated";
+
+pub struct DetachedHandle<'a> {
+    stopped: bool,
+    pub config: &'a Config,
+}
+
+impl<'a> DetachedHandle<'a> {
+    pub fn new(config: &'a Config) -> Self {
+        DetachedHandle {
+            stopped: false,
+            config,
+        }
+    }
+
+    pub async fn stop(&mut self) {
+        if self.stopped {
+            eprintln!("Attempted to stop an already stopped DetachedHandle.");
+            return;
+        }
+        self.stopped = true;
+        stop(self.config).await;
+    }
+}
+
+impl<'a> Drop for DetachedHandle<'a> {
+    fn drop(&mut self) {
+        if self.stopped {
+            return;
+        }
+        eprintln!(
+            "Warning: DetachedHandle was dropped without calling stop(). The container may still be running."
+        );
+    }
+}
+
+async fn start(config: &Config) {
+    let db_config = &config.database;
+    //
+    // write the config files for the api server and database client
+    println!("Writing config files...");
+    write_env_files(&db_config);
+    println!("Config files written to:");
+    println!("  - {}", to_absolute_path(API_CONFIG_PATH).display());
+    println!("  - {}", to_absolute_path(DB_CONFIG_PATH).display());
+}
+
+async fn stop(config: &Config) {
+    let db_config = &config.database;
+    // stop the container
+    println!("Stopping container...");
+    stop_container(db_config, "database".to_string()).await;
+    // remove the generated config file
+    println!("Removing generated config file...");
+    remove_file_if_exists(DB_CONFIG_PATH);
+    remove_file_if_exists(API_CONFIG_PATH);
+    println!("Container stopped.");
+}
+
+pub async fn start_attached(config: &Config) {
+    start(config).await;
+
+    // wait for user input, ctrl+c, or other signals before exiting
+    println!("Press Ctrl+C, or send SIGTERM to stop the container...");
+    await_termination_signal().await;
+
+    stop(config).await;
+}
+
+#[must_use]
+pub async fn start_detached(config: &'_ Config) -> DetachedHandle<'_> {
+    start(config).await;
+    DetachedHandle::new(config)
+}

apps/container/src/main.rs

@@ -0,0 +1,53 @@
+use clap::Parser;
+use container::Config;
+use container::start_attached;
+
+use container::db::DBInfo;
+
+/// Command line arguments
+#[derive(Parser, Debug)]
+#[command(author, version, about, long_about = None)]
+struct Args {
+    /// Database type to use: 'postgres' or 'sqlite'. Can also be set with DB_TYPE env var.
+    #[arg(long, default_value = "sqlite", env = "DB_TYPE")]
+    db_type: String,
+}
+
+#[tokio::main]
+async fn main() {
+    // Parse command line arguments and environment variables
+    let args = Args::parse();
+
+    println!("Starting container with database type: {}", args.db_type);
+    let db_config = match args.db_type.to_lowercase().as_str() {
+        "postgres" | "pg" | "pgsql" => {
+            use container::db::postgresql::PostgreSQLContainer;
+            println!("Using PostgreSQL database");
+            PostgreSQLContainer::new(None)
+                .await
+                .get_db_container_config_info()
+                .await
+        }
+        "sqlite" | "sql" => {
+            println!("Using SQLite database");
+            use container::db::sqlite::SQLiteContainer;
+            SQLiteContainer::new(None)
+                .await
+                .get_db_container_config_info()
+                .await
+        }
+        other => {
+            eprintln!("Unknown db_type: {}. Use 'postgres' or 'sqlite'", other);
+            std::process::exit(1);
+        }
+    };
+    println!("Database configuration obtained.");
+
+    let config = Config {
+        database: db_config,
+    };
+
+    println!("Starting container...");
+    start_attached(&config).await;
+    println!("Container stopped. Exiting...");
+}

apps/container/src/types.rs

@@ -0,0 +1,21 @@
+use std::sync::Arc;
+
+use testcontainers::{ContainerAsync, GenericImage};
+
+pub trait WithContainer {
+    fn container(&self) -> &Arc<ContainerAsync<GenericImage>>;
+}
+
+pub trait WithoutContainer {
+    fn on_delete(&self);
+}
+
+#[derive(Clone)]
+pub enum ConfigInfoType<T, U>
+where
+    T: WithContainer,
+    U: WithoutContainer,
+{
+    Containerized(T),
+    PreExisting(U),
+}

apps/container/src/util.rs

@@ -0,0 +1,114 @@
+use path_clean::PathClean;
+use std::path::{Path, PathBuf};
+use tokio::signal::unix::{SignalKind, signal};
+
+use crate::{
+    API_CONFIG_PATH, DB_CONFIG_PATH,
+    db::DBConfigInfoType,
+    env::{self, EnvFile},
+    types::{ConfigInfoType, WithContainer, WithoutContainer},
+};
+
+// relative to the current working directory
+pub fn to_absolute_path(path: &str) -> PathBuf {
+    if Path::new(path).is_absolute() {
+        return PathBuf::from(path);
+    }
+    std::env::current_dir()
+        .map(|cwd| cwd.join(path))
+        .unwrap_or_else(|_| PathBuf::from(path))
+        .clean()
+}
+
+pub fn write_env_files(db_config: &DBConfigInfoType) {
+    let api_config_path_absolute = to_absolute_path(API_CONFIG_PATH);
+    let db_config_path_absolute = to_absolute_path(DB_CONFIG_PATH);
+
+    let (db_type, db_url) = match db_config {
+        DBConfigInfoType::Containerized(config) => (config.db_type.clone(), config.url.clone()),
+        DBConfigInfoType::PreExisting(config) => (config.db_type.clone(), config.url.clone()),
+    };
+
+    let api_env_file = EnvFile {
+        file_type: env::EnvFileType::Yaml,
+        db_type: db_type,
+        db_url: db_url,
+    };
+
+    let mut db_env_file = api_env_file.clone();
+    db_env_file.file_type = env::EnvFileType::DotEnv;
+
+    api_env_file.write(&api_config_path_absolute);
+    db_env_file.write(&db_config_path_absolute);
+}
+
+pub async fn stop_container(
+    config: &ConfigInfoType<impl WithContainer, impl WithoutContainer>,
+    config_name: String,
+) {
+    match config {
+        ConfigInfoType::Containerized(container_info) => {
+            let container = container_info.container();
+            if let Err(e) = container.stop().await {
+                eprintln!(
+                    "Failed to stop container: {}. With error: {}",
+                    config_name, e
+                );
+            } else {
+                println!("Container {} stopped successfully.", config_name);
+            }
+        }
+        ConfigInfoType::PreExisting(pre_existing_info) => {
+            pre_existing_info.on_delete();
+            println!(
+                "Pre-existing resource for {} cleaned up successfully.",
+                config_name
+            );
+        }
+    }
+}
+
+pub fn remove_file_if_exists(path: &str) {
+    let path = std::path::Path::new(path);
+    if path.exists() {
+        if let Err(e) = std::fs::remove_file(path) {
+            eprintln!("Failed to remove file {}: {}", path.display(), e);
+        } else {
+            println!("Removed existing file: {}", path.display());
+        }
+    }
+}
+
+pub async fn await_termination_signal() {
+    tokio::select! {
+        _ = tokio::signal::ctrl_c() => {
+            println!("\nReceived Ctrl+C, stopping container...");
+        }
+        _ = async {
+            #[cfg(unix)]
+            {
+                let mut sigterm = signal(SignalKind::terminate()).expect("Failed to register SIGTERM handler");
+                sigterm.recv().await;
+                println!("\nReceived SIGTERM, stopping container...");
+            }
+            #[cfg(not(unix))]
+            {
+                // On non-Unix systems, just wait indefinitely
+                std::future::pending::<()>().await;
+            }
+        } => {}
+        _ = async {
+            #[cfg(unix)]
+            {
+                let mut sigquit = signal(SignalKind::quit()).expect("Failed to register SIGQUIT handler");
+                sigquit.recv().await;
+                println!("\nReceived SIGQUIT, stopping container...");
+            }
+            #[cfg(not(unix))]
+            {
+                // On non-Unix systems, just wait indefinitely
+                std::future::pending::<()>().await;
+            }
+        } => {}
+    }
+}

justfile

@@ -0,0 +1,7 @@
+simulate *args:
+  cd src/container && \
+  if [ -n "{{args}}" ]; then \
+    cargo run --bin container-simulate -- --db-type={{args}}; \
+  else \
+    cargo run --bin container-simulate; \
+  fi