feat: add drone.yml

.drone.yml

@@ -7,47 +7,34 @@ platform:
 
 steps:
 - name: build-release
-  image: rust:1.93
+  image: rust:1.91
   commands:
   - cargo build --verbose --workspace --release
 - name: test
-  image: rust:1.93
+  image: rust:1.91
   commands:
   - cargo test --verbose --workspace
 - name: lint
-  image: rust:1.93
+  image: rust:1.91
   commands:
   - rustup component add clippy
   - cargo clippy --all-targets --all-features
-- name: format
-  image: rust:1.93
-  commands:
-  - rustup component add rustfmt
-  - cargo fmt --all -- --check
-- name: build-image
-  image: plugins/docker
+- name: push-binary-release
+  image: plugins/gitea-release
   settings:
-    repo: gitea.lardenois.cc/matos-ai/pg-instance-handler
-    tags: latest
-    dockerfile: Dockerfile
-    dry_run: "true"
+    base_url: https://gitea.lardenois.cc
+    api_key:
+      from_secret: gitea-package
+    files:
+      - target/release/pg-instance-handler
+    title: "Release ${DRONE_TAG:-v${DRONE_BUILD_NUMBER}}"
+    note: "Automated release from commit ${DRONE_COMMIT_SHA}"
+    checksum:
+      - sha256
   when:
-    branch:
-      exclude:
-      - main
-- name: build-and-push-image
-  image: plugins/docker
-  settings:
-    registry: gitea.lardenois.cc
-    repo: gitea.lardenois.cc/matos-ai/pg-instance-handler
-    tags:
-    - latest
-    dockerfile: Dockerfile
-    username: 
-      from_secret: GITEA_USER
-    password: 
-      from_secret: GITEA_PASSWORD
-  when:
-    branch:
-      include:
-      - main
+    event: tag
+    status: success
+  depends_on:
+    - build-release
+    - test
+    - lint

Cargo.lock

@@ -23,17 +23,6 @@ version = "1.0.13"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "5192cca8006f1fd4f7237516f40fa183bb07f8fbdfedaa0036de5ea9b0b45e78"
 
-[[package]]
-name = "async-trait"
-version = "0.1.89"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9035ad2d096bed7955a320ee7e2230574d28fd3c3a0f186cbea1ff3c7eed5dbb"
-dependencies = [
- "proc-macro2",
- "quote",
- "syn",
-]
-
 [[package]]
 name = "atoi"
 version = "2.0.0"
@@ -851,12 +840,9 @@ checksum = "9b4f627cb1b25917193a259e49bdad08f671f8d9708acfd5fe0a8c1455d87220"
 name = "pg-instance-handler"
 version = "0.1.0"
 dependencies = [
- "async-trait",
  "mockall",
  "regex",
  "rstest",
- "serde",
- "serde_yaml",
  "sqlx",
  "tempfile",
  "tokio",
@@ -1255,19 +1241,6 @@ dependencies = [
  "serde",
 ]
 
-[[package]]
-name = "serde_yaml"
-version = "0.9.34+deprecated"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6a8b1a1a2ebf674015cc02edccce75287f1a0130d394307b36743c2f5d504b47"
-dependencies = [
- "indexmap",
- "itoa",
- "ryu",
- "serde",
- "unsafe-libyaml",
-]
-
 [[package]]
 name = "sha1"
 version = "0.10.6"
@@ -1678,21 +1651,9 @@ dependencies = [
  "mio",
  "pin-project-lite",
  "socket2",
- "tokio-macros",
  "windows-sys 0.61.2",
 ]
 
-[[package]]
-name = "tokio-macros"
-version = "2.6.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "af407857209536a95c8e56f8231ef2c2e2aff839b22e07a1ffcbc617e9db9fa5"
-dependencies = [
- "proc-macro2",
- "quote",
- "syn",
-]
-
 [[package]]
 name = "tokio-stream"
 version = "0.1.18"
@@ -1825,12 +1786,6 @@ version = "0.1.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "7df058c713841ad818f1dc5d3fd88063241cc61f49f5fbea4b951e8cf5a8d71d"
 
-[[package]]
-name = "unsafe-libyaml"
-version = "0.2.11"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "673aac59facbab8a9007c7f6108d11f63b603f7cabff99fabf650fea5c32b861"
-
 [[package]]
 name = "untrusted"
 version = "0.9.0"

Cargo.toml

@@ -4,14 +4,11 @@ version = "0.1.0"
 edition = "2024"
 
 [dependencies]
-async-trait = "0.1"
 regex = "1.12.2"
 sqlx = { version = "0.8.6", features = ["postgres", "runtime-tokio-rustls"] }
-tokio = { version = "1.49.0", features = ["rt-multi-thread", "macros"] }
+tokio = { version = "1.49.0", features = ["rt-multi-thread"] }
 tracing = "0.1.44"
 tracing-subscriber = "0.3.22"
-serde = { version = "1.0", features = ["derive"] }
-serde_yaml = "0.9"
 
 [dev-dependencies]
 mockall = "0.14.0"

Dockerfile

@@ -1,23 +0,0 @@
-FROM rust:1.93 AS builder
-
-RUN rustup target add x86_64-unknown-linux-musl
-RUN apt-get update && apt-get install -y musl-tools && rm -rf /var/lib/apt/lists/*
-
-WORKDIR /usr/src/app
-
-COPY ./Cargo.toml ./Cargo.lock ./
-COPY ./src ./src
-
-RUN cargo build --release --target x86_64-unknown-linux-musl
-
-# Runtime image with postgresql-client tooling available
-FROM debian:bookworm-slim
-RUN apt-get update && \
-	apt-get install -y --no-install-recommends postgresql-client ca-certificates && \
-	rm -rf /var/lib/apt/lists/*
-
-COPY --from=builder /usr/src/app/target/x86_64-unknown-linux-musl/release/pg-instance-handler /usr/local/bin/pg-instance-handler
-
-WORKDIR /
-
-ENTRYPOINT ["/usr/local/bin/pg-instance-handler"]

README.md

@@ -1,83 +0,0 @@
-# pg-instance-handler
-
-Reconcilie des bases PostgreSQL à partir d’un fichier YAML et gère leur cycle de vie (bases, utilisateurs, droits `CONNECT`, ownership).
-
-## Sommaire
-- Aperçu rapide
-- Démarrage rapide (Docker Compose)
-- Spécification YAML
-- Variables d’environnement
-- Build local et exécution
-- Opérations et sécurité
-- Dépannage
-
-## Aperçu rapide
-- Crée les bases manquantes et supprime celles non listées (sauf `postgres`).
-- Crée/actualise un utilisateur par base, lui donne l’accès et l’ownership de la base.
-- Définition de l’état désiré via un YAML monté dans le conteneur.
-
-Code pertinent:
-- Reconciliation: [src/app/database/database_service.rs](src/app/database/database_service.rs)
-- Spéc YAML / lecture état désiré: [src/actors/driven/database_file_retriever.rs](src/actors/driven/database_file_retriever.rs)
-- Accès Postgres (sqlx): [src/actors/driven/sqlx_handler.rs](src/actors/driven/sqlx_handler.rs)
-- Entrée: [src/main.rs](src/main.rs)
-- Conteneurs: [Dockerfile](Dockerfile), [docker-compose.yml](docker-compose.yml)
-
-## Démarrage rapide (Docker Compose)
-1) Préparez votre fichier YAML (exemple ci-dessous) à la racine du projet sous `database.yaml`.
-2) Lancez:
-
-```bash
-docker compose up --build
-```
-
-Le service va:
-- se connecter à PostgreSQL via `DATABASE_URL` (admin),
-- réconcilier les bases selon `database.yaml`,
-- créer/mettre à jour les utilisateurs et donner l’ownership,
-
-## Spécification YAML
-Exemple minimal: [database.yaml](database.yaml)
-
-```yaml
-databases:
-  - name: hello
-    user: hello_user
-    password: hello_password
-```
-
-- `name`: nom de la base à gérer
-- `user`: utilisateur propriétaire/consommateur de la base
-- `password`: mot de passe de cet utilisateur
-
-Notes:
-- Les noms (`name`, `user`) sont validés (lettres, chiffres, underscore; commencent par lettre/underscore).
-- Le programme ne supprime jamais la base `postgres`.
-
-## Variables d’environnement
-- `DATABASE_URL`: URL admin PostgreSQL pour l’orchestrateur (ex: `postgres://postgres:postgres@postgres:5432/postgres`).
-
-Les exemples d’ENV sont indiqués dans [docker-compose.yml](docker-compose.yml).
-
-## Build local et exécution
-```bash
-cargo build
-```
-
-Exécution locale (besoin d’un Postgres accessible et d’un `database.yaml`):
-```bash
-export DATABASE_URL="postgres://postgres:postgres@localhost:5432/postgres"
-
-cargo run
-```
-
-## Opérations et sécurité
-- Suppression: par défaut, toute base non listée est supprimée (sauf `postgres`). Pour un MVP, gardez le YAML strict et versionné. On pourra ajouter un mode « dry-run » et/ou restreindre la gestion à un préfixe (ex: `managed_`).
-- Permissions: l’utilisateur est `LOGIN PASSWORD`, reçoit `CONNECT` et devient owner de sa base.
-- Droits DB: `DATABASE_URL` doit pointer une base admin avec droits de création/suppression et gestion des rôles.
-
-## Dépannage
-- `DROP DATABASE` échoue: des connexions actives empêchent la suppression. Le programme essaie de terminer les sessions avant `DROP`; réessayez.
-
----
-Contributions bienvenues. Pour toute évolution (dry-run, périmètre géré, migrations), ouvrez une issue/PR.

database.txt

@@ -0,0 +1 @@
+hello

database.yaml

@@ -1,4 +0,0 @@
-databases:
-  - name: hello
-    user: hello_user
-    password: hello_password

docker-compose.yml

@@ -11,15 +11,3 @@ services:
       interval: 5s
       timeout: 5s
       retries: 5
-  
-  pg-instance-handler:
-    build:
-      context: .
-      dockerfile: Dockerfile
-    depends_on:
-      postgres:
-        condition: service_healthy
-    environment:
-      DATABASE_URL: postgres://postgres:postgres@postgres:5432/postgres
-    volumes:
-      - ./database.yaml:/database.yaml:ro

src/actors/driven/database_file_retriever.rs

@@ -1,172 +1,69 @@
-use crate::app::database::ports::driven::database_port::{
-    ForGettingDatabasesWantedState, GrantDbAccess, WantedState,
+use std::{
+    fs::File,
+    io::{BufRead, BufReader},
 };
-use regex::Regex;
-use serde::Deserialize;
 
+use crate::app::database_port::ForGettingDatabasesWantedState;
 pub struct DatabaseFileRetriever {
     file_path: String,
 }
 
-#[derive(Debug, Clone, Deserialize, PartialEq, Eq)]
-pub struct DbSpec {
-    pub name: String,
-    pub user: String,
-    pub password: String,
-}
-
-#[derive(Debug, Clone, Deserialize)]
-pub struct DesiredState {
-    pub databases: Vec<DbSpec>,
-}
-
 impl DatabaseFileRetriever {
     pub fn new(file_path: String) -> Self {
         DatabaseFileRetriever { file_path }
     }
 }
 
-#[async_trait::async_trait]
 impl ForGettingDatabasesWantedState for DatabaseFileRetriever {
-    async fn get_wanted_state(&self) -> Result<WantedState, String> {
-        let state = load_desired_state(&self.file_path)?;
-
-        let mut databases: Vec<String> = Vec::new();
-        let mut users: Vec<String> = Vec::new();
-        let mut user_passwords: std::collections::BTreeMap<String, String> =
-            std::collections::BTreeMap::new();
-        let mut database_owners: std::collections::BTreeMap<String, String> =
-            std::collections::BTreeMap::new();
-        let mut grants: Vec<GrantDbAccess> = Vec::new();
-
-        let ident_re = Regex::new(r"^[A-Za-z_][A-Za-z0-9_]*$").map_err(|e| e.to_string())?;
-
-        for db in state.databases {
-            if !ident_re.is_match(&db.name) {
-                return Err(format!("invalid database name: '{}'", db.name));
-            }
-            if !ident_re.is_match(&db.user) {
-                return Err(format!("invalid user name: '{}'", db.user));
-            }
-
-            if !databases.contains(&db.name) {
-                databases.push(db.name.clone());
-            }
-            if !users.contains(&db.user) {
-                users.push(db.user.clone());
-            }
-
-            match user_passwords.get(&db.user) {
-                Some(existing) if existing != &db.password => {
-                    return Err(format!(
-                        "conflicting passwords provided for user '{}'",
-                        db.user
-                    ));
-                }
-                Some(_) => {}
-                None => {
-                    user_passwords.insert(db.user.clone(), db.password.clone());
-                }
-            }
-
-            database_owners.insert(db.name.clone(), db.user.clone());
-
-            grants.push(GrantDbAccess {
-                user: db.user,
-                database: db.name,
-            });
+    fn get_wanted_databases(&self) -> Result<Vec<String>, String> {
+        let file = File::open(&self.file_path)
+            .map_err(|e| format!("failed to open '{}': {}", self.file_path, e))?;
+        let reader = BufReader::new(file);
+        let mut databases = Vec::new();
+        for line in reader.lines() {
+            let line = line.map_err(|e| format!("failed to read line: {}", e))?;
+            databases.push(line);
         }
-
-        Ok(WantedState {
-            databases,
-            users,
-            user_passwords,
-            database_owners,
-            grants,
-        })
+        Ok(databases)
     }
 }
 
-pub fn load_desired_state(path: &str) -> Result<DesiredState, String> {
-    let content =
-        std::fs::read_to_string(path).map_err(|e| format!("failed to read '{}': {}", path, e))?;
-    let state: DesiredState = serde_yaml::from_str(&content)
-        .map_err(|e| format!("failed to parse YAML '{}': {}", path, e))?;
-    Ok(state)
-}
-
 #[cfg(test)]
 mod tests {
     use super::*;
-    use std::collections::BTreeMap;
+    use rstest::rstest;
+    use std::io::Write;
+    use tempfile::tempdir;
 
-    #[test]
-    fn wanted_state_keeps_passwords_and_owners() {
-        let tmp = tempfile::NamedTempFile::new().unwrap();
-        std::fs::write(
-            tmp.path(),
-            r#"databases:
-  - name: hello
-    user: hello_user
-    password: secret
-"#,
-        )
-        .unwrap();
+    #[rstest]
+    #[case::two_lines(Some(vec!["db1", "db2"]), Some(vec!["db1".to_string(), "db2".to_string()]))]
+    #[case::empty(Some(vec![]), Some(vec![]))]
+    #[case::missing(None, None)]
+    fn get_wanted_databases_parametrized(
+        #[case] lines: Option<Vec<&str>>,
+        #[case] expected: Option<Vec<String>>,
+    ) {
+        let dir = tempdir().unwrap();
+        let file_path = dir.path().join("dbs.txt");
 
-        let retriever = DatabaseFileRetriever::new(tmp.path().to_string_lossy().to_string());
-        let rt = tokio::runtime::Runtime::new().unwrap();
-        let wanted = rt.block_on(retriever.get_wanted_state()).unwrap();
+        if let Some(lines) = &lines {
+            let mut file = File::create(&file_path).unwrap();
+            for l in lines {
+                writeln!(file, "{}", l).unwrap();
+            }
+        }
 
-        assert_eq!(wanted.databases, vec!["hello".to_string()]);
-        assert_eq!(wanted.users, vec!["hello_user".to_string()]);
+        let retriever = DatabaseFileRetriever::new(file_path.to_string_lossy().into_owned());
+        let result = retriever.get_wanted_databases();
 
-        let mut expected_pw = BTreeMap::new();
-        expected_pw.insert("hello_user".to_string(), "secret".to_string());
-        assert_eq!(wanted.user_passwords, expected_pw);
-
-        let mut expected_owners = BTreeMap::new();
-        expected_owners.insert("hello".to_string(), "hello_user".to_string());
-        assert_eq!(wanted.database_owners, expected_owners);
-    }
-
-    #[test]
-    fn conflicting_passwords_for_same_user_fails() {
-        let tmp = tempfile::NamedTempFile::new().unwrap();
-        std::fs::write(
-            tmp.path(),
-            r#"databases:
-  - name: db1
-    user: u1
-    password: p1
-  - name: db2
-    user: u1
-    password: p2
-"#,
-        )
-        .unwrap();
-
-        let retriever = DatabaseFileRetriever::new(tmp.path().to_string_lossy().to_string());
-        let rt = tokio::runtime::Runtime::new().unwrap();
-        let err = rt.block_on(retriever.get_wanted_state()).unwrap_err();
-        assert!(err.contains("conflicting passwords"));
-    }
-
-    #[test]
-    fn invalid_identifiers_fail_fast() {
-        let tmp = tempfile::NamedTempFile::new().unwrap();
-        std::fs::write(
-            tmp.path(),
-            r#"databases:
-  - name: "bad-name"
-    user: ok_user
-    password: secret
-"#,
-        )
-        .unwrap();
-
-        let retriever = DatabaseFileRetriever::new(tmp.path().to_string_lossy().to_string());
-        let rt = tokio::runtime::Runtime::new().unwrap();
-        let err = rt.block_on(retriever.get_wanted_state()).unwrap_err();
-        assert!(err.contains("invalid database name"));
+        match expected {
+            Some(expected_vec) => {
+                let got = result.unwrap();
+                assert_eq!(got, expected_vec);
+            }
+            None => {
+                assert!(result.is_err());
+            }
+        }
     }
 }

src/actors/driven/sqlx_handler.rs

@@ -1,17 +1,22 @@
+use crate::app::database_port::ForManagingDatabases;
 use regex::Regex;
-use sqlx::PgPool;
+use sqlx::postgres::PgPoolOptions;
 use tracing::{debug, info};
 
-use crate::app::database::ports::driven::database_port::{ForManagingDatabases, GrantDbAccess};
-
-#[derive(Clone)]
 pub struct SQLXHandler {
-    pool: PgPool,
+    database_url: String,
 }
 
 impl SQLXHandler {
-    pub fn new(pool: PgPool) -> Self {
-        SQLXHandler { pool }
+    pub fn new(database_url: String) -> Self {
+        SQLXHandler { database_url }
+    }
+
+    fn make_runtime() -> Result<tokio::runtime::Runtime, String> {
+        tokio::runtime::Builder::new_current_thread()
+            .enable_all()
+            .build()
+            .map_err(|e| format!("failed to build runtime: {}", e))
     }
 
     fn sanitize_identifier(name: &str) -> Result<String, String> {
@@ -24,228 +29,128 @@ impl SQLXHandler {
             Err(format!("invalid database name: '{}'", name))
         }
     }
-
-    async fn user_exists(&self, user_ident: &str) -> Result<bool, String> {
-        let exists: Option<bool> =
-            sqlx::query_scalar("SELECT EXISTS(SELECT 1 FROM pg_roles WHERE rolname = $1)")
-                .bind(user_ident)
-                .fetch_optional(&self.pool)
-                .await
-                .map_err(|e| format!("role exists check failed: {}", e))?;
-        Ok(exists.unwrap_or(false))
-    }
 }
 
-#[async_trait::async_trait]
 impl ForManagingDatabases for SQLXHandler {
-    async fn list_databases(&self) -> Result<Vec<String>, String> {
+    fn list_databases(&self) -> Result<Vec<String>, String> {
         info!("Listing PostgreSQL databases");
-        let dbs: Vec<String> = sqlx::query_scalar(
-            r#"SELECT datname FROM pg_database WHERE datistemplate = false ORDER BY datname"#,
-        )
-        .fetch_all(&self.pool)
-        .await
-        .map_err(|e| format!("list databases failed: {}", e))?;
+        let rt = Self::make_runtime()?;
+        rt.block_on(async {
+            let pool = PgPoolOptions::new()
+                .max_connections(5)
+                .connect(&self.database_url)
+                .await
+                .map_err(|e| format!("failed to connect: {}", e))?;
 
-        debug!(?dbs, "Got databases");
-        Ok(dbs)
+            let dbs: Vec<String> = sqlx::query_scalar(
+                r#"SELECT datname FROM pg_database WHERE datistemplate = false ORDER BY datname"#,
+            )
+            .fetch_all(&pool)
+            .await
+            .map_err(|e| format!("list databases failed: {}", e))?;
+
+            debug!(?dbs, "Got databases");
+            Ok(dbs)
+        })
     }
 
-    async fn create_database(&self, name: &str) -> Result<(), String> {
+    fn create_database(&self, name: &str) -> Result<(), String> {
         let ident = Self::sanitize_identifier(name)?;
         info!(database = %ident, "Creating database");
-        let sql = format!("CREATE DATABASE {}", ident);
-        sqlx::query(&sql)
-            .execute(&self.pool)
-            .await
-            .map_err(|e| format!("create database failed: {}", e))?;
+        let rt = Self::make_runtime()?;
+        rt.block_on(async {
+            let pool = PgPoolOptions::new()
+                .max_connections(5)
+                .connect(&self.database_url)
+                .await
+                .map_err(|e| format!("failed to connect: {}", e))?;
 
-        info!(database = %ident, "Database created");
-
-        Ok(())
+            let sql = format!("CREATE DATABASE {}", ident);
+            sqlx::query(&sql)
+                .execute(&pool)
+                .await
+                .map_err(|e| format!("create database failed: {}", e))?;
+            Ok(())
+        })
     }
 
-    async fn delete_database(&self, name: &str) -> Result<(), String> {
+    fn delete_database(&self, name: &str) -> Result<(), String> {
         let ident = Self::sanitize_identifier(name)?;
         info!(database = %ident, "Deleting database");
-        // Terminate connections before dropping (best effort)
-        let terminate_sql = r#"
+        let rt = Self::make_runtime()?;
+        rt.block_on(async {
+            let pool = PgPoolOptions::new()
+                .max_connections(5)
+                .connect(&self.database_url)
+                .await
+                .map_err(|e| format!("failed to connect: {}", e))?;
+
+            // Terminate connections before dropping (best effort)
+            let terminate_sql = r#"
                 SELECT pg_terminate_backend(pid)
                 FROM pg_stat_activity
                 WHERE datname = $1 AND pid <> pg_backend_pid()
             "#;
-        let _ = sqlx::query(terminate_sql)
-            .bind(&ident)
-            .execute(&self.pool)
-            .await;
+            let _ = sqlx::query(terminate_sql).bind(&ident).execute(&pool).await;
 
-        let sql = format!("DROP DATABASE IF EXISTS {}", ident);
-        sqlx::query(&sql)
-            .execute(&self.pool)
-            .await
-            .map_err(|e| format!("drop database failed: {}", e))?;
-
-        info!(database = %ident, "Database deleted");
-
-        Ok(())
-    }
-
-    async fn list_users(&self) -> Result<Vec<String>, String> {
-        info!("Listing PostgreSQL users");
-        let users: Vec<String> = sqlx::query_scalar(
-            r#"SELECT rolname FROM pg_roles WHERE rolcanlogin = true ORDER BY rolname"#,
-        )
-        .fetch_all(&self.pool)
-        .await
-        .map_err(|e| format!("list users failed: {}", e))?;
-
-        debug!(?users, "Got users");
-        Ok(users)
-    }
-
-    async fn list_grants(&self) -> Result<Vec<GrantDbAccess>, String> {
-        info!("Listing explicit database grants");
-        // We only return explicit CONNECT grants from database ACLs (datacl).
-        // This avoids exploding results when PUBLIC has CONNECT.
-        let rows: Vec<(String, Option<String>)> = sqlx::query_as(
-            r#"SELECT datname, array_to_string(datacl, ',') AS acl
-                   FROM pg_database
-                   WHERE datistemplate = false
-                   ORDER BY datname"#,
-        )
-        .fetch_all(&self.pool)
-        .await
-        .map_err(|e| format!("list grants failed: {}", e))?;
-
-        let mut grants: Vec<GrantDbAccess> = Vec::new();
-        for (db_name, acl_opt) in rows {
-            let Some(acl) = acl_opt else {
-                continue;
-            };
-            for entry in acl.split(',') {
-                // Entry format: grantee=privs/grantor
-                // Example: hello_user=CTc/postgres
-                let (lhs, rhs) = match entry.split_once('=') {
-                    Some(v) => v,
-                    None => continue,
-                };
-                let grantee = lhs.trim();
-                if grantee.is_empty() {
-                    // PUBLIC
-                    continue;
-                }
-                let privs = rhs.split('/').next().unwrap_or("");
-                if privs.contains('c') {
-                    grants.push(GrantDbAccess {
-                        user: grantee.to_string(),
-                        database: db_name.clone(),
-                    });
-                }
-            }
-        }
-
-        debug!(?grants, "Got grants");
-        Ok(grants)
-    }
-
-    async fn ensure_user(&self, user: &str, password: &str) -> Result<(), String> {
-        let user_ident = Self::sanitize_identifier(user)?;
-        info!(user = %user_ident, "Ensuring user (password + login)");
-
-        let quoted_password: String = sqlx::query_scalar("SELECT quote_literal($1)")
-            .bind(password)
-            .fetch_one(&self.pool)
-            .await
-            .map_err(|e| format!("failed to quote password: {}", e))?;
-
-        let exists = self.user_exists(&user_ident).await?;
-        if exists {
-            let sql = format!(
-                "ALTER ROLE {} WITH LOGIN PASSWORD {} NOSUPERUSER NOCREATEDB NOCREATEROLE NOREPLICATION",
-                user_ident, quoted_password
-            );
+            let sql = format!("DROP DATABASE IF EXISTS {}", ident);
             sqlx::query(&sql)
-                .execute(&self.pool)
+                .execute(&pool)
                 .await
-                .map_err(|e| format!("alter role failed: {}", e))?;
-        } else {
-            let sql = format!(
-                "CREATE ROLE {} WITH LOGIN PASSWORD {} NOSUPERUSER NOCREATEDB NOCREATEROLE NOREPLICATION",
-                user_ident, quoted_password
-            );
-            sqlx::query(&sql)
-                .execute(&self.pool)
-                .await
-                .map_err(|e| format!("create role failed: {}", e))?;
-        }
-        Ok(())
-    }
-
-    async fn delete_user(&self, name: &str) -> Result<(), String> {
-        let user_ident = Self::sanitize_identifier(name)?;
-        info!(user = %user_ident, "Deleting user");
-        // Best-effort cleanup to avoid DROP ROLE failures.
-        let reassign = format!("REASSIGN OWNED BY {} TO postgres", user_ident);
-        let _ = sqlx::query(&reassign).execute(&self.pool).await;
-
-        let drop_owned = format!("DROP OWNED BY {}", user_ident);
-        let _ = sqlx::query(&drop_owned).execute(&self.pool).await;
-
-        let sql = format!("DROP ROLE IF EXISTS {}", user_ident);
-        sqlx::query(&sql)
-            .execute(&self.pool)
-            .await
-            .map_err(|e| format!("delete user failed: {}", e))?;
-        Ok(())
-    }
-
-    async fn revoke_public_connect(&self, database: &str) -> Result<(), String> {
-        let db_ident = Self::sanitize_identifier(database)?;
-        info!(database = %db_ident, "Revoking CONNECT from PUBLIC");
-        let revoke = format!("REVOKE CONNECT ON DATABASE {} FROM PUBLIC", db_ident);
-        sqlx::query(&revoke)
-            .execute(&self.pool)
-            .await
-            .map_err(|e| format!("revoke public connect failed: {}", e))?;
-        Ok(())
-    }
-
-    async fn ensure_db_owner(&self, database: &str, owner: &str) -> Result<(), String> {
-        let db_ident = Self::sanitize_identifier(database)?;
-        let owner_ident = Self::sanitize_identifier(owner)?;
-        info!(database = %db_ident, owner = %owner_ident, "Ensuring database owner");
-        let sql = format!("ALTER DATABASE {} OWNER TO {}", db_ident, owner_ident);
-        sqlx::query(&sql)
-            .execute(&self.pool)
-            .await
-            .map_err(|e| format!("alter owner failed: {}", e))?;
-        Ok(())
-    }
-
-    async fn grant_access(&self, user: &str, database: &str) -> Result<(), String> {
-        let db_ident = Self::sanitize_identifier(database)?;
-        let user_ident = Self::sanitize_identifier(user)?;
-        info!(user = %user_ident, database = %db_ident, "Granting access");
-        let grant = format!("GRANT CONNECT ON DATABASE {} TO {}", db_ident, user_ident);
-        sqlx::query(&grant)
-            .execute(&self.pool)
-            .await
-            .map_err(|e| format!("grant access failed: {}", e))?;
-        Ok(())
-    }
-
-    async fn revoke_access(&self, user: &str, database: &str) -> Result<(), String> {
-        let db_ident = Self::sanitize_identifier(database)?;
-        let user_ident = Self::sanitize_identifier(user)?;
-        info!(user = %user_ident, database = %db_ident, "Revoking access");
-        let revoke = format!(
-            "REVOKE CONNECT ON DATABASE {} FROM {}",
-            db_ident, user_ident
-        );
-        sqlx::query(&revoke)
-            .execute(&self.pool)
-            .await
-            .map_err(|e| format!("revoke access failed: {}", e))?;
-        Ok(())
+                .map_err(|e| format!("drop database failed: {}", e))?;
+            Ok(())
+        })
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn sanitize_identifier_allows_valid() {
+        for ok in ["db", "_db", "db_123", "A_b1"] {
+            assert!(
+                SQLXHandler::sanitize_identifier(ok).is_ok(),
+                "{} should be valid",
+                ok
+            );
+        }
+    }
+
+    #[test]
+    fn sanitize_identifier_rejects_invalid() {
+        for bad in ["", "1db", "db-1", "db name", "db;drop", "db$", "db."] {
+            assert!(
+                SQLXHandler::sanitize_identifier(bad).is_err(),
+                "{} should be invalid",
+                bad
+            );
+        }
+    }
+
+    // Optional smoke test against a real Postgres instance.
+    // Set TEST_ADMIN_DATABASE_URL to something like:
+    //   postgres://postgres:postgres@localhost/postgres
+    // Run with: cargo test -- --ignored
+    #[test]
+    #[ignore]
+    fn postgres_smoke_create_list_delete() {
+        let url = std::env::var("TEST_ADMIN_DATABASE_URL")
+            .expect("set TEST_ADMIN_DATABASE_URL to an admin database URL");
+        let handler = SQLXHandler::new(url);
+
+        let db_name = format!("testdb_{}", std::process::id());
+
+        // Ensure clean slate (ignore errors)
+        let _ = handler.delete_database(&db_name);
+
+        handler.create_database(&db_name).expect("create ok");
+        let list = handler.list_databases().expect("list ok");
+        assert!(list.contains(&db_name));
+
+        handler.delete_database(&db_name).expect("drop ok");
+        let list2 = handler.list_databases().expect("list ok");
+        assert!(!list2.contains(&db_name));
     }
 }

src/app/database/database_service.rs

@@ -1,410 +0,0 @@
-use tracing::info;
-
-use crate::app::database::ports::driven::database_port::{
-    ForGettingDatabasesWantedState, ForManagingDatabases,
-};
-
-pub struct DatabaseService<X, Y>
-where
-    X: ForManagingDatabases,
-    Y: ForGettingDatabasesWantedState,
-{
-    database_handler: X,
-    wanted_state_handler: Y,
-}
-
-impl<X, Y> DatabaseService<X, Y>
-where
-    X: ForManagingDatabases,
-    Y: ForGettingDatabasesWantedState,
-{
-    pub fn new(database_handler: X, wanted_state_handler: Y) -> Self {
-        DatabaseService {
-            database_handler,
-            wanted_state_handler,
-        }
-    }
-
-    pub async fn reconcile_databases(&self) -> Result<(), String> {
-        let wanted_state = self.wanted_state_handler.get_wanted_state().await?;
-        let existing_databases = self.database_handler.list_databases().await?;
-        let existing_users = self.database_handler.list_users().await?;
-        let existing_grants = self.database_handler.list_grants().await?;
-
-        info!(
-            "Reconciling databases. Wanted: {:?}, Existing: {:?}",
-            wanted_state.databases, existing_databases
-        );
-
-        for db in &wanted_state.databases {
-            if !existing_databases.contains(db) {
-                self.database_handler.create_database(db).await?;
-            }
-        }
-
-        for db in &existing_databases {
-            if !wanted_state.databases.contains(db) && db != "postgres" {
-                self.database_handler.delete_database(db).await?;
-            }
-        }
-
-        // Ensure users exist and have expected password.
-        for user in &wanted_state.users {
-            if user == "postgres" {
-                continue;
-            }
-            let password = wanted_state
-                .user_passwords
-                .get(user)
-                .ok_or_else(|| format!("missing password for user '{}'", user))?;
-            self.database_handler.ensure_user(user, password).await?;
-        }
-
-        for user in &existing_users {
-            if !wanted_state.users.contains(user) && user != "postgres" {
-                self.database_handler.delete_user(user).await?;
-            }
-        }
-
-        // Enforce connect policy: remove PUBLIC and ensure expected ownership.
-        // PostgreSQL grants CONNECT on databases to PUBLIC by default. If you want users to only
-        // connect to their declared databases, we must revoke it at least on `postgres`.
-        self.database_handler
-            .revoke_public_connect("postgres")
-            .await?;
-
-        for db in &wanted_state.databases {
-            if db == "postgres" {
-                continue;
-            }
-            self.database_handler.revoke_public_connect(db).await?;
-        }
-
-        for (db, owner) in &wanted_state.database_owners {
-            if db == "postgres" {
-                continue;
-            }
-            self.database_handler.ensure_db_owner(db, owner).await?;
-        }
-
-        for grant in &wanted_state.grants {
-            let already_granted = existing_grants
-                .iter()
-                .any(|g| g.user == grant.user && g.database == grant.database);
-            if !already_granted {
-                self.database_handler
-                    .grant_access(&grant.user, &grant.database)
-                    .await?;
-            }
-        }
-
-        // Revoke explicit grants on databases we manage when they are no longer wanted.
-        for existing_grant in &existing_grants {
-            if !wanted_state.databases.contains(&existing_grant.database) {
-                continue;
-            }
-            let still_wanted = wanted_state
-                .grants
-                .iter()
-                .any(|g| g.user == existing_grant.user && g.database == existing_grant.database);
-            if !still_wanted {
-                self.database_handler
-                    .revoke_access(&existing_grant.user, &existing_grant.database)
-                    .await?;
-            }
-        }
-
-        Ok(())
-    }
-}
-
-#[cfg(test)]
-mod tests {
-    use super::*;
-    use crate::app::database::ports::driven::database_port::{
-        MockForGettingDatabasesWantedState, MockForManagingDatabases, WantedState,
-    };
-    use mockall::predicate::*;
-    use rstest::rstest;
-    use std::collections::BTreeMap;
-
-    #[rstest]
-    // No databases exist and none are wanted
-    #[case::no_existing_no_wanted(Ok(vec![]), Ok(vec![]), vec![], Ok(()), vec![], Ok(()), Ok(()))]
-    // No databases exist but one is wanted
-    #[case::no_existing_one_wanted(Ok(vec![]), Ok(vec!["db1".to_string()]), vec!["db1".to_string()], Ok(()), vec![], Ok(()), Ok(()))]
-    // A database exists and is wanted
-    #[case::exists_and_wanted(Ok(vec!["db1".to_string()]), Ok(vec!["db1".to_string()]), vec![], Ok(()), vec![], Ok(()), Ok(()))]
-    // One database exists and another is wanted
-    #[case::different_existing_vs_wanted(Ok(vec!["db1".to_string()]), Ok(vec!["db2".to_string()]), vec!["db2".to_string()], Ok(()), vec!["db1".to_string()], Ok(()), Ok(()))]
-    // A database exists but is not wanted
-    #[case::existing_not_wanted(Ok(vec!["db1".to_string()]), Ok(vec![]), vec![], Ok(()), vec!["db1".to_string()], Ok(()), Ok(()))]
-    // Multiple databases exist and none are wanted
-    #[case::multiple_existing_none_wanted(Ok(vec!["db1".to_string(), "db2".to_string()]), Ok(vec![]), vec![], Ok(()), vec!["db1".to_string(), "db2".to_string()], Ok(()), Ok(()))]
-    // No databases exist but multiple are wanted
-    #[case::no_existing_multiple_wanted(Ok(vec![]), Ok(vec!["db1".to_string(), "db2".to_string()]), vec!["db1".to_string(), "db2".to_string()], Ok(()), vec![], Ok(()), Ok(()))]
-    // Multiple databases exist and some are wanted
-    #[case::multiple_existing_some_wanted(Ok(vec!["db1".to_string(), "db2".to_string(), "db3".to_string()]), Ok(vec!["db2".to_string(), "db4".to_string()]), vec!["db4".to_string()], Ok(()), vec!["db1".to_string(), "db3".to_string()], Ok(()), Ok(()))]
-    // Error retrieving existing databases
-    #[case::error_list_databases(Err("DB Error".to_string()), Ok(vec!["db1".to_string()]), vec![], Ok(()), vec![], Ok(()), Err("DB Error".to_string()))]
-    // Error retrieving wanted databases
-    #[case::error_wanted_databases(Ok(vec!["db1".to_string()]), Err("Wanted State Error".to_string()), vec![], Ok(()), vec![], Ok(()), Err("Wanted State Error".to_string()))]
-    // Error creating a database
-    #[case::error_create_database(Ok(vec![]), Ok(vec!["db1".to_string()]), vec!["db1".to_string()], Err("Creation Error".to_string()), vec![], Ok(()), Err("Creation Error".to_string()))]
-    // Error deleting a database
-    #[case::error_delete_database(Ok(vec!["db1".to_string()]), Ok(vec![]), vec![], Ok(()), vec!["db1".to_string()], Err("Deletion Error".to_string()), Err("Deletion Error".to_string()))]
-    // If database name is "postgres", delete should not be called
-    #[case::dont_delete_postgres(Ok(vec!["postgres".to_string(), "db1".to_string()]), Ok(vec!["db1".to_string()]), vec![], Ok(()), vec![], Ok(()), Ok(()))]
-    fn test_reconcile_databases(
-        #[case] existing_dbs_result: Result<Vec<String>, String>,
-        #[case] wanted_dbs_result: Result<Vec<String>, String>,
-        #[case] expected_database_creation_param: Vec<String>,
-        #[case] expected_database_creation_result: Result<(), String>,
-        #[case] expected_database_deletion_param: Vec<String>,
-        #[case] expected_database_deletion_result: Result<(), String>,
-        #[case] expected_result: Result<(), String>,
-    ) {
-        let mut mock_db_handler = MockForManagingDatabases::new();
-        let mut mock_wanted_state_handler = MockForGettingDatabasesWantedState::new();
-
-        mock_wanted_state_handler
-            .expect_get_wanted_state()
-            .returning(move || {
-                wanted_dbs_result.clone().map(|dbs| WantedState {
-                    databases: dbs,
-                    users: vec![],
-                    user_passwords: BTreeMap::new(),
-                    database_owners: BTreeMap::new(),
-                    grants: vec![],
-                })
-            });
-
-        mock_db_handler
-            .expect_list_databases()
-            .returning(move || existing_dbs_result.clone());
-
-        mock_db_handler
-            .expect_list_users()
-            .times(0..)
-            .returning(|| Ok(vec![]));
-
-        mock_db_handler
-            .expect_list_grants()
-            .times(0..)
-            .returning(|| Ok(vec![]));
-
-        mock_db_handler
-            .expect_revoke_public_connect()
-            .times(0..)
-            .returning(|_| Ok(()));
-
-        mock_db_handler
-            .expect_ensure_db_owner()
-            .times(0..)
-            .returning(|_, _| Ok(()));
-
-        mock_db_handler
-            .expect_ensure_user()
-            .times(0..)
-            .returning(|_, _| Ok(()));
-
-        for db_name in expected_database_creation_param.clone() {
-            let db_name_clone = db_name.clone();
-            let expected_database_creation_result = expected_database_creation_result.clone();
-            mock_db_handler
-                .expect_create_database()
-                .with(eq(db_name_clone))
-                .returning(move |_| expected_database_creation_result.clone());
-        }
-
-        for db_name in expected_database_deletion_param.clone() {
-            let db_name_clone = db_name.clone();
-            let expected_database_deletion_result = expected_database_deletion_result.clone();
-            mock_db_handler
-                .expect_delete_database()
-                .with(eq(db_name_clone))
-                .returning(move |_| expected_database_deletion_result.clone());
-        }
-
-        let service = DatabaseService::new(mock_db_handler, mock_wanted_state_handler);
-        let rt = tokio::runtime::Runtime::new().unwrap();
-        let result = rt.block_on(service.reconcile_databases());
-        assert_eq!(result, expected_result);
-    }
-
-    #[test]
-    fn ensure_user_is_called_with_password() {
-        let mut mock_db_handler = MockForManagingDatabases::new();
-        let mut mock_wanted_state_handler = MockForGettingDatabasesWantedState::new();
-
-        mock_wanted_state_handler
-            .expect_get_wanted_state()
-            .returning(|| {
-                let mut user_passwords = BTreeMap::new();
-                user_passwords.insert("u1".to_string(), "p1".to_string());
-
-                Ok(WantedState {
-                    databases: vec![],
-                    users: vec!["u1".to_string()],
-                    user_passwords,
-                    database_owners: BTreeMap::new(),
-                    grants: vec![],
-                })
-            });
-
-        mock_db_handler
-            .expect_list_databases()
-            .returning(|| Ok(vec![]));
-        mock_db_handler.expect_list_users().returning(|| Ok(vec![]));
-        mock_db_handler
-            .expect_list_grants()
-            .returning(|| Ok(vec![]));
-
-        mock_db_handler
-            .expect_ensure_user()
-            .with(eq("u1"), eq("p1"))
-            .returning(|_, _| Ok(()));
-
-        mock_db_handler
-            .expect_revoke_public_connect()
-            .with(eq("postgres"))
-            .times(1)
-            .returning(|_| Ok(()));
-        mock_db_handler
-            .expect_ensure_db_owner()
-            .times(0)
-            .returning(|_, _| Ok(()));
-
-        let service = DatabaseService::new(mock_db_handler, mock_wanted_state_handler);
-        let rt = tokio::runtime::Runtime::new().unwrap();
-        rt.block_on(service.reconcile_databases()).unwrap();
-    }
-
-    #[test]
-    fn enforces_public_policy_ownership_and_grants() {
-        let mut mock_db_handler = MockForManagingDatabases::new();
-        let mut mock_wanted_state_handler = MockForGettingDatabasesWantedState::new();
-
-        mock_wanted_state_handler
-            .expect_get_wanted_state()
-            .returning(|| {
-                let mut user_passwords = BTreeMap::new();
-                user_passwords.insert("u1".to_string(), "p1".to_string());
-                let mut database_owners = BTreeMap::new();
-                database_owners.insert("db1".to_string(), "u1".to_string());
-
-                Ok(WantedState {
-                    databases: vec!["db1".to_string()],
-                    users: vec!["u1".to_string()],
-                    user_passwords,
-                    database_owners,
-                    grants: vec![
-                        crate::app::database::ports::driven::database_port::GrantDbAccess {
-                            user: "u1".to_string(),
-                            database: "db1".to_string(),
-                        },
-                    ],
-                })
-            });
-
-        mock_db_handler
-            .expect_list_databases()
-            .returning(|| Ok(vec!["db1".to_string()]));
-        mock_db_handler
-            .expect_list_users()
-            .returning(|| Ok(vec!["u1".to_string()]));
-        mock_db_handler
-            .expect_list_grants()
-            .returning(|| Ok(vec![]));
-
-        mock_db_handler
-            .expect_ensure_user()
-            .with(eq("u1"), eq("p1"))
-            .returning(|_, _| Ok(()));
-
-        mock_db_handler
-            .expect_revoke_public_connect()
-            .with(eq("postgres"))
-            .times(1)
-            .returning(|_| Ok(()));
-
-        mock_db_handler
-            .expect_revoke_public_connect()
-            .with(eq("db1"))
-            .returning(|_| Ok(()));
-
-        mock_db_handler
-            .expect_ensure_db_owner()
-            .with(eq("db1"), eq("u1"))
-            .returning(|_, _| Ok(()));
-
-        mock_db_handler
-            .expect_grant_access()
-            .with(eq("u1"), eq("db1"))
-            .returning(|_, _| Ok(()));
-
-        let service = DatabaseService::new(mock_db_handler, mock_wanted_state_handler);
-        let rt = tokio::runtime::Runtime::new().unwrap();
-        rt.block_on(service.reconcile_databases()).unwrap();
-    }
-
-    #[test]
-    fn revokes_stale_grants_on_managed_databases() {
-        let mut mock_db_handler = MockForManagingDatabases::new();
-        let mut mock_wanted_state_handler = MockForGettingDatabasesWantedState::new();
-
-        mock_wanted_state_handler
-            .expect_get_wanted_state()
-            .returning(|| {
-                Ok(WantedState {
-                    databases: vec!["db1".to_string()],
-                    users: vec![],
-                    user_passwords: BTreeMap::new(),
-                    database_owners: BTreeMap::new(),
-                    grants: vec![],
-                })
-            });
-
-        mock_db_handler
-            .expect_list_databases()
-            .returning(|| Ok(vec!["db1".to_string()]));
-        mock_db_handler.expect_list_users().returning(|| Ok(vec![]));
-        mock_db_handler.expect_list_grants().returning(|| {
-            Ok(vec![
-                crate::app::database::ports::driven::database_port::GrantDbAccess {
-                    user: "u2".to_string(),
-                    database: "db1".to_string(),
-                },
-            ])
-        });
-
-        mock_db_handler
-            .expect_revoke_public_connect()
-            .with(eq("postgres"))
-            .times(1)
-            .returning(|_| Ok(()));
-
-        mock_db_handler
-            .expect_revoke_public_connect()
-            .with(eq("db1"))
-            .returning(|_| Ok(()));
-
-        mock_db_handler
-            .expect_revoke_access()
-            .with(eq("u2"), eq("db1"))
-            .returning(|_, _| Ok(()));
-
-        mock_db_handler
-            .expect_ensure_db_owner()
-            .times(0)
-            .returning(|_, _| Ok(()));
-        mock_db_handler
-            .expect_ensure_user()
-            .times(0)
-            .returning(|_, _| Ok(()));
-
-        let service = DatabaseService::new(mock_db_handler, mock_wanted_state_handler);
-        let rt = tokio::runtime::Runtime::new().unwrap();
-        rt.block_on(service.reconcile_databases()).unwrap();
-    }
-}

src/app/database/ports/driven/database_port.rs

@@ -1,40 +0,0 @@
-#[cfg_attr(test, mockall::automock)]
-#[async_trait::async_trait]
-pub trait ForGettingDatabasesWantedState {
-    async fn get_wanted_state(&self) -> Result<WantedState, String>;
-}
-
-#[cfg_attr(test, mockall::automock)]
-#[async_trait::async_trait]
-pub trait ForManagingDatabases {
-    async fn list_databases(&self) -> Result<Vec<String>, String>;
-    async fn list_users(&self) -> Result<Vec<String>, String>;
-    async fn list_grants(&self) -> Result<Vec<GrantDbAccess>, String>;
-
-    async fn create_database(&self, name: &str) -> Result<(), String>;
-    async fn delete_database(&self, name: &str) -> Result<(), String>;
-
-    async fn ensure_user(&self, user: &str, password: &str) -> Result<(), String>;
-    async fn delete_user(&self, name: &str) -> Result<(), String>;
-
-    async fn revoke_public_connect(&self, database: &str) -> Result<(), String>;
-    async fn ensure_db_owner(&self, database: &str, owner: &str) -> Result<(), String>;
-
-    async fn grant_access(&self, user: &str, database: &str) -> Result<(), String>;
-    async fn revoke_access(&self, user: &str, database: &str) -> Result<(), String>;
-}
-
-#[derive(Debug, Clone, PartialEq, Eq)]
-pub struct WantedState {
-    pub databases: Vec<String>,
-    pub users: Vec<String>,
-    pub user_passwords: std::collections::BTreeMap<String, String>,
-    pub database_owners: std::collections::BTreeMap<String, String>,
-    pub grants: Vec<GrantDbAccess>,
-}
-
-#[derive(Debug, Clone, PartialEq, Eq)]
-pub struct GrantDbAccess {
-    pub user: String,
-    pub database: String,
-}

src/app/database_port.rs

@@ -0,0 +1,11 @@
+#[cfg_attr(test, mockall::automock)]
+pub trait ForGettingDatabasesWantedState {
+    fn get_wanted_databases(&self) -> Result<Vec<String>, String>;
+}
+
+#[cfg_attr(test, mockall::automock)]
+pub trait ForManagingDatabases {
+    fn list_databases(&self) -> Result<Vec<String>, String>;
+    fn create_database(&self, name: &str) -> Result<(), String>;
+    fn delete_database(&self, name: &str) -> Result<(), String>;
+}

src/app/database_service.rs

@@ -0,0 +1,126 @@
+use tracing::info;
+
+use crate::app::database_port::{ForGettingDatabasesWantedState, ForManagingDatabases};
+
+pub struct DatabaseService<X, Y>
+where
+    X: ForManagingDatabases,
+    Y: ForGettingDatabasesWantedState,
+{
+    database_handler: X,
+    wanted_state_handler: Y,
+}
+
+impl<X, Y> DatabaseService<X, Y>
+where
+    X: ForManagingDatabases,
+    Y: ForGettingDatabasesWantedState,
+{
+    pub fn new(database_handler: X, wanted_state_handler: Y) -> Self {
+        DatabaseService {
+            database_handler,
+            wanted_state_handler,
+        }
+    }
+
+    pub fn reconcile_databases(&self) -> Result<(), String> {
+        let wanted_databases = self.wanted_state_handler.get_wanted_databases()?;
+        let existing_databases = self.database_handler.list_databases()?;
+
+        info!(
+            "Reconciling databases. Wanted: {:?}, Existing: {:?}",
+            wanted_databases, existing_databases
+        );
+
+        for db in &wanted_databases {
+            if !existing_databases.contains(db) {
+                self.database_handler.create_database(db)?;
+            }
+        }
+
+        for db in &existing_databases {
+            if !wanted_databases.contains(db) && db != "postgres" {
+                self.database_handler.delete_database(db)?;
+            }
+        }
+        Ok(())
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use crate::app::database_port::{MockForGettingDatabasesWantedState, MockForManagingDatabases};
+    use mockall::predicate::*;
+    use rstest::rstest;
+
+    #[rstest]
+    // No databases exist and none are wanted
+    #[case::no_existing_no_wanted(Ok(vec![]), Ok(vec![]), vec![], Ok(()), vec![], Ok(()), Ok(()))]
+    // No databases exist but one is wanted
+    #[case::no_existing_one_wanted(Ok(vec![]), Ok(vec!["db1".to_string()]), vec!["db1".to_string()], Ok(()), vec![], Ok(()), Ok(()))]
+    // A database exists and is wanted
+    #[case::exists_and_wanted(Ok(vec!["db1".to_string()]), Ok(vec!["db1".to_string()]), vec![], Ok(()), vec![], Ok(()), Ok(()))]
+    // One database exists and another is wanted
+    #[case::different_existing_vs_wanted(Ok(vec!["db1".to_string()]), Ok(vec!["db2".to_string()]), vec!["db2".to_string()], Ok(()), vec!["db1".to_string()], Ok(()), Ok(()))]
+    // A database exists but is not wanted
+    #[case::existing_not_wanted(Ok(vec!["db1".to_string()]), Ok(vec![]), vec![], Ok(()), vec!["db1".to_string()], Ok(()), Ok(()))]
+    // Multiple databases exist and none are wanted
+    #[case::multiple_existing_none_wanted(Ok(vec!["db1".to_string(), "db2".to_string()]), Ok(vec![]), vec![], Ok(()), vec!["db1".to_string(), "db2".to_string()], Ok(()), Ok(()))]
+    // No databases exist but multiple are wanted
+    #[case::no_existing_multiple_wanted(Ok(vec![]), Ok(vec!["db1".to_string(), "db2".to_string()]), vec!["db1".to_string(), "db2".to_string()], Ok(()), vec![], Ok(()), Ok(()))]
+    // Multiple databases exist and some are wanted
+    #[case::multiple_existing_some_wanted(Ok(vec!["db1".to_string(), "db2".to_string(), "db3".to_string()]), Ok(vec!["db2".to_string(), "db4".to_string()]), vec!["db4".to_string()], Ok(()), vec!["db1".to_string(), "db3".to_string()], Ok(()), Ok(()))]
+    // Error retrieving existing databases
+    #[case::error_list_databases(Err("DB Error".to_string()), Ok(vec!["db1".to_string()]), vec![], Ok(()), vec![], Ok(()), Err("DB Error".to_string()))]
+    // Error retrieving wanted databases
+    #[case::error_wanted_databases(Ok(vec!["db1".to_string()]), Err("Wanted State Error".to_string()), vec![], Ok(()), vec![], Ok(()), Err("Wanted State Error".to_string()))]
+    // Error creating a database
+    #[case::error_create_database(Ok(vec![]), Ok(vec!["db1".to_string()]), vec!["db1".to_string()], Err("Creation Error".to_string()), vec![], Ok(()), Err("Creation Error".to_string()))]
+    // Error deleting a database
+    #[case::error_delete_database(Ok(vec!["db1".to_string()]), Ok(vec![]), vec![], Ok(()), vec!["db1".to_string()], Err("Deletion Error".to_string()), Err("Deletion Error".to_string()))]
+    // If database name is "postgres", delete should not be called
+    #[case::dont_delete_postgres(Ok(vec!["postgres".to_string(), "db1".to_string()]), Ok(vec!["db1".to_string()]), vec![], Ok(()), vec![], Ok(()), Ok(()))]
+    fn test_reconcile_databases(
+        #[case] existing_dbs_result: Result<Vec<String>, String>,
+        #[case] wanted_dbs_result: Result<Vec<String>, String>,
+        #[case] expected_database_creation_param: Vec<String>,
+        #[case] expected_database_creation_result: Result<(), String>,
+        #[case] expected_database_deletion_param: Vec<String>,
+        #[case] expected_database_deletion_result: Result<(), String>,
+        #[case] expected_result: Result<(), String>,
+    ) {
+        let mut mock_db_handler = MockForManagingDatabases::new();
+        let mut mock_wanted_state_handler = MockForGettingDatabasesWantedState::new();
+
+        mock_wanted_state_handler
+            .expect_get_wanted_databases()
+            .returning(move || wanted_dbs_result.clone());
+
+        mock_db_handler
+            .expect_list_databases()
+            .returning(move || existing_dbs_result.clone());
+
+        for db_name in expected_database_creation_param.clone() {
+            let db_name_clone = db_name.clone();
+            let expected_database_creation_result = expected_database_creation_result.clone();
+            mock_db_handler
+                .expect_create_database()
+                .with(eq(db_name_clone))
+                .returning(move |_| expected_database_creation_result.clone());
+        }
+
+        for db_name in expected_database_deletion_param.clone() {
+            let db_name_clone = db_name.clone();
+            let expected_database_deletion_result = expected_database_deletion_result.clone();
+            mock_db_handler
+                .expect_delete_database()
+                .with(eq(db_name_clone))
+                .returning(move |_| expected_database_deletion_result.clone());
+        }
+
+        let service = DatabaseService::new(mock_db_handler, mock_wanted_state_handler);
+        let result = service.reconcile_databases();
+        assert_eq!(result, expected_result);
+    }
+}

src/main.rs

@@ -1,12 +1,6 @@
 mod app {
-    pub mod database {
-        pub mod database_service;
-        pub mod ports {
-            pub mod driven {
-                pub mod database_port;
-            }
-        }
-    }
+    pub mod database_port;
+    pub mod database_service;
 }
 
 mod actors {
@@ -16,27 +10,16 @@ mod actors {
     }
 }
 
-#[tokio::main]
-async fn main() {
+fn main() {
     tracing_subscriber::fmt::init();
 
     let database_url = std::env::var("DATABASE_URL")
         .unwrap_or_else(|_| "postgres://postgres:postgres@localhost/postgres".to_string());
-
-    let pool = sqlx::postgres::PgPoolOptions::new()
-        .max_connections(5)
-        .connect(&database_url)
-        .await
-        .expect("failed to connect to postgres");
-    let database_handler = actors::driven::sqlx_handler::SQLXHandler::new(pool);
-
+    let database_handler = actors::driven::sqlx_handler::SQLXHandler::new(database_url);
     let file_retriever = actors::driven::database_file_retriever::DatabaseFileRetriever::new(
-        "database.yaml".to_string(),
+        "database.txt".to_string(),
     );
 
-    let database_service = app::database::database_service::DatabaseService::new(
-        database_handler.clone(),
-        file_retriever,
-    );
-    database_service.reconcile_databases().await.unwrap();
+    let service = app::database_service::DatabaseService::new(database_handler, file_retriever);
+    service.reconcile_databases().unwrap();
 }