feat(server): schéma PostgreSQL sync-ready (ticket #49)

Ajoute la migration initiale (migrations/0001_initial_schema.sql,
incluant la table users nécessaire à l'adapter d'auth du ticket #48),
le runner de migration (bin/migrate.dart) et l'accès Postgres
(infrastructure/postgres/postgres_database.dart). dart pub get OK,
dart analyze clean, dart test vert (le test PostgreSQL réel est skip
faute de TEST_DATABASE_URL/Docker disponible dans ce sandbox ; SQL de
migration revu manuellement).

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

server/README.md

@@ -24,6 +24,39 @@ When `PORT` is not set, it listens on `8080`.
 PORT=9090 dart run bin/server.dart
 ```
 
+## PostgreSQL
+
+Ticket #49 adds the initial sync-ready PostgreSQL schema and a minimal
+connection/migration utility.
+
+Database environment variables:
+
+- `DATABASE_HOST`: PostgreSQL host.
+- `DATABASE_PORT`: PostgreSQL port, defaults to `5432` when omitted.
+- `DATABASE_NAME`: database name.
+- `DATABASE_USER`: database user.
+- `DATABASE_PASSWORD`: database password.
+
+Apply migrations from `server/`:
+
+```bash
+DATABASE_HOST=localhost \
+DATABASE_PORT=5432 \
+DATABASE_NAME=gametime \
+DATABASE_USER=gametime \
+DATABASE_PASSWORD=gametime \
+dart run bin/migrate.dart
+```
+
+Migrations are read from `server/migrations/` in alphabetical order. The v1
+runner is intentionally simple; SQL files use idempotent DDL where practical.
+
+The PostgreSQL integration test is skipped unless `TEST_DATABASE_URL` is set:
+
+```bash
+TEST_DATABASE_URL=postgres://gametime:gametime@localhost:5432/gametime dart test
+```
+
 Healthcheck:
 
 ```bash
@@ -39,7 +72,8 @@ Expected response:
 ## Scope
 
 Ticket #47 only scaffolds the Dart server, the hexagonal directory layout and
-the `/health` endpoint.
+the `/health` endpoint. Ticket #49 adds the first PostgreSQL schema only; auth,
+sync endpoints and sharing behavior are still implemented in later tickets.
 
 Upcoming tickets will fill the empty adapters and use cases:
 

server/bin/migrate.dart

@@ -0,0 +1,14 @@
+import 'package:gametime_server/infrastructure/postgres/postgres_database.dart';
+
+Future<void> main(List<String> arguments) async {
+  final connection = await PostgresConnectionFactory(
+    PostgresConnectionConfig.fromEnvironment(),
+  ).open();
+
+  try {
+    await PostgresMigrator(connection).applyMigrations();
+    print('PostgreSQL migrations applied.');
+  } finally {
+    await connection.close();
+  }
+}

server/lib/infrastructure/postgres/README.md

@@ -1,5 +1,6 @@
 # PostgreSQL infrastructure
 
-Placeholder for PostgreSQL repository adapters.
+Connection and migration utilities for server-side PostgreSQL.
 
-The schema and concrete persistence code are planned for ticket #49.
+Repository adapters will be added by the sync/auth tickets once their ports are
+defined.

server/lib/infrastructure/postgres/postgres_database.dart

@@ -0,0 +1,176 @@
+import 'dart:io';
+
+import 'package:postgres/postgres.dart';
+
+final class PostgresConnectionConfig {
+  const PostgresConnectionConfig({
+    required this.host,
+    required this.port,
+    required this.database,
+    required this.username,
+    required this.password,
+    this.sslMode = SslMode.disable,
+  });
+
+  factory PostgresConnectionConfig.fromEnvironment([
+    Map<String, String>? environment,
+  ]) {
+    final env = environment ?? Platform.environment;
+    return PostgresConnectionConfig(
+      host: _requiredEnv(env, 'DATABASE_HOST'),
+      port: int.tryParse(env['DATABASE_PORT'] ?? '') ?? 5432,
+      database: _requiredEnv(env, 'DATABASE_NAME'),
+      username: _requiredEnv(env, 'DATABASE_USER'),
+      password: _requiredEnv(env, 'DATABASE_PASSWORD'),
+    );
+  }
+
+  final String host;
+  final int port;
+  final String database;
+  final String username;
+  final String password;
+  final SslMode sslMode;
+}
+
+final class PostgresConnectionFactory {
+  const PostgresConnectionFactory(this.config) : databaseUrl = null;
+
+  const PostgresConnectionFactory.fromDatabaseUrl(this.databaseUrl)
+    : config = null;
+
+  final PostgresConnectionConfig? config;
+  final String? databaseUrl;
+
+  Future<Connection> open() {
+    final databaseUrl = this.databaseUrl;
+    if (databaseUrl != null) {
+      return Connection.openFromUrl(databaseUrl);
+    }
+    final config = this.config!;
+    return Connection.open(
+      Endpoint(
+        host: config.host,
+        port: config.port,
+        database: config.database,
+        username: config.username,
+        password: config.password,
+      ),
+      settings: ConnectionSettings(sslMode: config.sslMode),
+    );
+  }
+}
+
+final class PostgresMigrator {
+  const PostgresMigrator(this.connection);
+
+  final Connection connection;
+
+  Future<void> applyMigrations({String migrationsPath = 'migrations'}) async {
+    final directory = Directory(migrationsPath);
+    if (!await directory.exists()) {
+      throw StateError('Migrations directory not found: $migrationsPath');
+    }
+
+    final files =
+        await directory
+              .list()
+              .where((entity) => entity is File && entity.path.endsWith('.sql'))
+              .cast<File>()
+              .toList()
+          ..sort((left, right) => left.path.compareTo(right.path));
+
+    for (final file in files) {
+      final sql = await file.readAsString();
+      for (final statement in _splitSqlStatements(sql)) {
+        await connection.execute(statement);
+      }
+    }
+  }
+}
+
+String _requiredEnv(Map<String, String> environment, String key) {
+  final value = environment[key];
+  if (value == null || value.trim().isEmpty) {
+    throw StateError('Missing required environment variable: $key');
+  }
+  return value;
+}
+
+List<String> _splitSqlStatements(String sql) {
+  final statements = <String>[];
+  final buffer = StringBuffer();
+  var inSingleQuote = false;
+  var inDoubleQuote = false;
+  String? dollarQuoteTag;
+
+  for (var index = 0; index < sql.length; index++) {
+    final char = sql[index];
+    final next = index + 1 < sql.length ? sql[index + 1] : null;
+
+    if (dollarQuoteTag != null) {
+      if (sql.startsWith(dollarQuoteTag, index)) {
+        buffer.write(dollarQuoteTag);
+        index += dollarQuoteTag.length - 1;
+        dollarQuoteTag = null;
+      } else {
+        buffer.write(char);
+      }
+      continue;
+    }
+
+    if (!inSingleQuote && !inDoubleQuote && char == r'$') {
+      final tag = _readDollarQuoteTag(sql, index);
+      if (tag != null) {
+        dollarQuoteTag = tag;
+        buffer.write(tag);
+        index += tag.length - 1;
+        continue;
+      }
+    }
+
+    if (!inDoubleQuote && char == "'") {
+      buffer.write(char);
+      if (inSingleQuote && next == "'") {
+        index++;
+        buffer.write(next);
+      } else {
+        inSingleQuote = !inSingleQuote;
+      }
+      continue;
+    }
+
+    if (!inSingleQuote && char == '"') {
+      inDoubleQuote = !inDoubleQuote;
+      buffer.write(char);
+      continue;
+    }
+
+    if (!inSingleQuote && !inDoubleQuote && char == ';') {
+      final statement = buffer.toString().trim();
+      if (statement.isNotEmpty) {
+        statements.add(statement);
+      }
+      buffer.clear();
+      continue;
+    }
+
+    buffer.write(char);
+  }
+
+  final statement = buffer.toString().trim();
+  if (statement.isNotEmpty) {
+    statements.add(statement);
+  }
+  return statements;
+}
+
+String? _readDollarQuoteTag(String sql, int start) {
+  final end = sql.indexOf(r'$', start + 1);
+  if (end == -1) {
+    return null;
+  }
+  final tagName = sql.substring(start + 1, end);
+  final validTag = RegExp(r'^[A-Za-z_][A-Za-z0-9_]*$|^$').hasMatch(tagName);
+  return validTag ? sql.substring(start, end + 1) : null;
+}

server/migrations/0001_initial_schema.sql

@@ -0,0 +1,114 @@
+CREATE EXTENSION IF NOT EXISTS pgcrypto;
+CREATE EXTENSION IF NOT EXISTS citext;
+
+CREATE TABLE IF NOT EXISTS users (
+  id uuid PRIMARY KEY DEFAULT gen_random_uuid(),
+  email citext NOT NULL UNIQUE,
+  password_hash text NOT NULL,
+  display_name text,
+  created_at timestamptz NOT NULL DEFAULT now(),
+  updated_at timestamptz NOT NULL DEFAULT now(),
+  disabled_at timestamptz,
+  CONSTRAINT users_email_not_blank CHECK (length(trim(email::text)) > 0),
+  CONSTRAINT users_password_hash_not_blank CHECK (length(trim(password_hash)) > 0)
+);
+
+CREATE TABLE IF NOT EXISTS auth_sessions (
+  id uuid PRIMARY KEY DEFAULT gen_random_uuid(),
+  user_id uuid NOT NULL REFERENCES users(id) ON DELETE CASCADE,
+  token_hash text NOT NULL UNIQUE,
+  issued_at timestamptz NOT NULL DEFAULT now(),
+  expires_at timestamptz NOT NULL,
+  revoked_at timestamptz,
+  user_agent text,
+  device_label text,
+  CONSTRAINT auth_sessions_token_hash_not_blank CHECK (length(trim(token_hash)) > 0),
+  CONSTRAINT auth_sessions_expires_after_issued CHECK (expires_at > issued_at)
+);
+
+CREATE TABLE IF NOT EXISTS synced_resources (
+  server_id uuid PRIMARY KEY DEFAULT gen_random_uuid(),
+  owner_user_id uuid NOT NULL REFERENCES users(id) ON DELETE CASCADE,
+  resource_type text NOT NULL,
+  client_id text NOT NULL,
+  payload_json jsonb NOT NULL,
+  schema_version integer NOT NULL,
+  client_updated_at timestamptz NOT NULL,
+  server_updated_at timestamptz NOT NULL DEFAULT now(),
+  deleted_at timestamptz,
+  origin_device_id text,
+  CONSTRAINT synced_resources_type_check CHECK (
+    resource_type IN (
+      'exercise',
+      'program',
+      'workoutTemplate',
+      'workoutHistory',
+      'mediaAsset'
+    )
+  ),
+  CONSTRAINT synced_resources_client_id_not_blank CHECK (length(trim(client_id)) > 0),
+  CONSTRAINT synced_resources_schema_version_positive CHECK (schema_version > 0),
+  CONSTRAINT synced_resources_owner_type_client_unique UNIQUE (
+    owner_user_id,
+    resource_type,
+    client_id
+  )
+);
+
+CREATE INDEX IF NOT EXISTS idx_synced_resources_owner_type_updated
+  ON synced_resources (owner_user_id, resource_type, server_updated_at);
+
+CREATE INDEX IF NOT EXISTS idx_synced_resources_owner_updated
+  ON synced_resources (owner_user_id, server_updated_at);
+
+CREATE OR REPLACE FUNCTION set_synced_resources_server_updated_at()
+RETURNS trigger AS $$
+BEGIN
+  NEW.server_updated_at = now();
+  RETURN NEW;
+END;
+$$ LANGUAGE plpgsql;
+
+DROP TRIGGER IF EXISTS trg_synced_resources_set_server_updated_at
+  ON synced_resources;
+
+CREATE TRIGGER trg_synced_resources_set_server_updated_at
+  BEFORE UPDATE ON synced_resources
+  FOR EACH ROW
+  EXECUTE FUNCTION set_synced_resources_server_updated_at();
+
+CREATE TABLE IF NOT EXISTS shares (
+  id uuid PRIMARY KEY DEFAULT gen_random_uuid(),
+  sender_user_id uuid NOT NULL REFERENCES users(id) ON DELETE CASCADE,
+  resource_type text NOT NULL,
+  payload_json jsonb NOT NULL,
+  created_at timestamptz NOT NULL DEFAULT now(),
+  revoked_at timestamptz,
+  CONSTRAINT shares_resource_type_check CHECK (
+    resource_type IN ('program', 'workoutTemplate')
+  )
+);
+
+CREATE TABLE IF NOT EXISTS share_recipients (
+  id uuid PRIMARY KEY DEFAULT gen_random_uuid(),
+  share_id uuid NOT NULL REFERENCES shares(id) ON DELETE CASCADE,
+  recipient_user_id uuid NOT NULL REFERENCES users(id) ON DELETE CASCADE,
+  status text NOT NULL DEFAULT 'pending',
+  responded_at timestamptz,
+  CONSTRAINT share_recipients_status_check CHECK (
+    status IN ('pending', 'accepted', 'declined', 'revoked')
+  ),
+  CONSTRAINT share_recipients_share_user_unique UNIQUE (
+    share_id,
+    recipient_user_id
+  )
+);
+
+CREATE INDEX IF NOT EXISTS idx_auth_sessions_user_id
+  ON auth_sessions (user_id);
+
+CREATE INDEX IF NOT EXISTS idx_shares_sender_user_id
+  ON shares (sender_user_id);
+
+CREATE INDEX IF NOT EXISTS idx_share_recipients_recipient_status
+  ON share_recipients (recipient_user_id, status);

server/pubspec.lock

@@ -41,6 +41,22 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "2.1.2"
+  buffer:
+    dependency: transitive
+    description:
+      name: buffer
+      sha256: "389da2ec2c16283c8787e0adaede82b1842102f8c8aae2f49003a766c5c6b3d1"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.2.3"
+  charcode:
+    dependency: transitive
+    description:
+      name: charcode
+      sha256: fb0f1107cac15a5ea6ef0a6ef71a807b9e4267c713bb93e00e92d737cc8dbd8a
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.4.0"
   cli_config:
     dependency: transitive
     description:
@@ -209,6 +225,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "1.5.2"
+  postgres:
+    dependency: "direct main"
+    description:
+      name: postgres
+      sha256: "123de5cbadc56a7e8d9fa485c780b6b56940b4081f4c74f3a5578682757c299b"
+      url: "https://pub.dev"
+    source: hosted
+    version: "3.5.12"
   pub_semver:
     dependency: transitive
     description:

server/pubspec.yaml

@@ -6,6 +6,7 @@ environment:
   sdk: ^3.10.0
 
 dependencies:
+  postgres: ^3.5.12
   shelf: ^1.4.2
   shelf_router: ^1.1.4
 

server/test/postgres_migrations_test.dart

@@ -0,0 +1,48 @@
+import 'dart:io';
+
+import 'package:gametime_server/infrastructure/postgres/postgres_database.dart';
+import 'package:test/test.dart';
+
+void main() {
+  test('PostgreSQL migrations create the sync-ready schema', () async {
+    final databaseUrl = Platform.environment['TEST_DATABASE_URL'];
+    if (databaseUrl == null || databaseUrl.trim().isEmpty) {
+      markTestSkipped(
+        'Set TEST_DATABASE_URL to run PostgreSQL migration tests.',
+      );
+      return;
+    }
+
+    final connection = await PostgresConnectionFactory.fromDatabaseUrl(
+      databaseUrl,
+    ).open();
+    addTearDown(() => connection.close());
+
+    await PostgresMigrator(connection).applyMigrations();
+
+    final result = await connection.execute('''
+      SELECT table_name
+      FROM information_schema.tables
+      WHERE table_schema = 'public'
+        AND table_name IN (
+          'users',
+          'auth_sessions',
+          'synced_resources',
+          'shares',
+          'share_recipients'
+        )
+    ''');
+    final tableNames = result.map((row) => row[0] as String).toSet();
+
+    expect(
+      tableNames,
+      containsAll({
+        'users',
+        'auth_sessions',
+        'synced_resources',
+        'shares',
+        'share_recipients',
+      }),
+    );
+  });
+}