src/gismo/application.py

@@ -3,8 +3,10 @@ from cpl_core.configuration import ConfigurationABC
 from cpl_core.console import Console
 from cpl_core.dependency_injection import ServiceProviderABC
 from cpl_core.logging import LoggerABC
+
 from gismo_core.abc.bot_service_abc import BotServiceABC
 from gismo_core.service.bot_service import BotService
+from gismo_data.service.migration_service import MigrationService
 
 
 class Gismo(ApplicationABC):
@@ -14,12 +16,14 @@ class Gismo(ApplicationABC):
 
         self._bot: BotService = services.get_service(BotServiceABC)
         self._logger: LoggerABC = services.get_service(LoggerABC)
+        self._migrations: MigrationService = services.get_service(MigrationService)
 
     async def configure(self):
         pass
 
     async def main(self):
         try:
+            self._migrations.migrate()
             self._logger.trace(__name__, f'Try to start {BotService}')
             await self._bot.start_async()
         except Exception as e:

src/gismo/startup.py

@@ -15,12 +15,17 @@ from gismo_core.abc.message_service_abc import MessageServiceABC
 from gismo_core.service.bot_service import BotService
 from gismo_core.service.message_service import MessageService
 from gismo_data.abc.known_user_repository_abc import KnownUserRepositoryABC
+from gismo_data.abc.migration_abc import MigrationABC
 from gismo_data.abc.server_repository_abc import ServerRepositoryABC
 from gismo_data.abc.user_repository_abc import UserRepositoryABC
 from gismo_data.db_context import DBContext
+from gismo_data.migration.initial_migration import InitialMigration
+from gismo_data.migration.migration_0_3 import Migration_0_3
 from gismo_data.service.client_repository_service import (
     ClientRepositoryABC, ClientRepositoryService)
-from gismo_data.service.known_user_repository_service import KnownUserRepositoryService
+from gismo_data.service.known_user_repository_service import \
+    KnownUserRepositoryService
+from gismo_data.service.migration_service import MigrationService
 from gismo_data.service.server_repository_service import \
     ServerRepositoryService
 from gismo_data.service.user_repository_service import UserRepositoryService
@@ -58,19 +63,29 @@ class Startup(StartupABC):
         
         services.add_db_context(DBContext, self._config.get_configuration(DatabaseSettings))
         
+        # modules
         services.add_singleton(ModuleServiceABC, ModuleService)
         services.add_singleton(BotServiceABC, BotService)
         services.add_transient(MessageServiceABC, MessageService)
         
+        # services
+        services.add_transient(MigrationService)
+
+        # data services
         services.add_transient(ServerRepositoryABC, ServerRepositoryService)
         services.add_transient(UserRepositoryABC, UserRepositoryService)
         services.add_transient(ClientRepositoryABC, ClientRepositoryService)
         services.add_transient(KnownUserRepositoryABC, KnownUserRepositoryService)
 
+        # modules
         services.add_transient(ModuleABC, Database)
         services.add_transient(ModuleABC, Base)
         services.add_transient(ModuleABC, BootLog)
 
+        # migrations
+        services.add_transient(MigrationABC, InitialMigration)
+        services.add_transient(MigrationABC, Migration_0_3)
+        
         provider: ServiceProviderABC = services.build_service_provider()
         
         startup_init_time = round((datetime.now() - self._config.get_configuration('Startup_StartTime')).total_seconds(), 2)

src/gismo_data/abc/migration_abc.py

@@ -0,0 +1,13 @@
+from abc import ABC, abstractmethod
+
+
+class MigrationABC(ABC):
+
+    @abstractmethod
+    def __init__(self): pass
+
+    @abstractmethod
+    def upgrade(self): pass
+
+    @abstractmethod
+    def downgrade(self): pass

src/gismo_data/db_context.py

@@ -16,10 +16,6 @@ class DBContext(DatabaseContext):
         try:
             self._logger.debug(__name__, "Connecting to database")
             self._db.connect(database_settings)
-            for table in self._tables:
-                self._logger.debug(__name__, f"Create table if not exists: {table}")
-                self._logger.trace(__name__, f'Send SQL command: {table.get_create_string()}')
-                self._db.cursor.execute(table.get_create_string())
 
             self.save_changes()
             self._logger.info(__name__, "Connected to database")

src/gismo_data/migration/__init__.py

@@ -0,0 +1 @@
+# imports

src/gismo_data/migration/initial_migration.py

@@ -0,0 +1,57 @@
+from cpl_core.logging import LoggerABC
+
+from gismo_data.abc.migration_abc import MigrationABC
+from gismo_data.db_context import DBContext
+
+
+class InitialMigration(MigrationABC):
+
+    def __init__(self, logger: LoggerABC, db: DBContext):
+        self._logger = logger
+        self._db = db
+        self._cursor = db.cursor
+
+    def upgrade(self):
+        self._logger.debug(__name__, 'Running upgrade')
+
+        self._cursor.execute(
+            str(f"""
+            CREATE TABLE IF NOT EXISTS `MigrationHistory` (
+                `MigrationId` VARCHAR(255),
+                `CreatedAt` DATETIME(6),
+                `LastModifiedAt` DATETIME(6),
+                PRIMARY KEY(`MigrationId`)
+            );
+            """)
+        )
+
+        self._cursor.execute(
+            str(f"""
+            CREATE TABLE IF NOT EXISTS `Servers` (
+                `ServerId` BIGINT NOT NULL AUTO_INCREMENT,
+                `DiscordServerId` BIGINT NOT NULL,
+                `CreatedAt` DATETIME(6),
+                `LastModifiedAt` DATETIME(6),
+                PRIMARY KEY(`ServerId`)
+            );
+            """)
+        )
+
+        self._cursor.execute(
+            str(f"""
+            CREATE TABLE IF NOT EXISTS `Users` (
+                `UserId` BIGINT NOT NULL AUTO_INCREMENT,
+                `DiscordId` BIGINT NOT NULL,
+                `XP` BIGINT NOT NULL DEFAULT 0,
+                `ServerId` BIGINT,
+                `CreatedAt` DATETIME(6),
+                `LastModifiedAt` DATETIME(6),
+                FOREIGN KEY (`ServerId`) REFERENCES Servers(`ServerId`),
+                PRIMARY KEY(`UserId`)
+            );
+            """)
+        )
+
+    def downgrade(self):
+        self._cursor.execute('DROP TABLE `Servers`;')
+        self._cursor.execute('DROP TABLE `Users`;')

src/gismo_data/migration/migration_0_3.py

@@ -0,0 +1,65 @@
+from cpl_core.logging import LoggerABC
+
+from gismo_data.abc.migration_abc import MigrationABC
+from gismo_data.db_context import DBContext
+
+class Migration_0_3(MigrationABC):
+
+    def __init__(self, logger: LoggerABC, db: DBContext):
+        self._logger = logger
+        self._db = db
+        self._cursor = db.cursor
+
+    def upgrade(self):
+        self._logger.debug(__name__, 'Running upgrade')
+
+        self._cursor.execute(
+            str(f"""
+            CREATE TABLE IF NOT EXISTS `Clients` (
+                `ClientId` BIGINT NOT NULL AUTO_INCREMENT,
+                `DiscordClientId` BIGINT NOT NULL,
+                `SentMessageCount` BIGINT NOT NULL DEFAULT 0,
+                `ReceivedMessageCount` BIGINT NOT NULL DEFAULT 0,
+                `DeletedMessageCount` BIGINT NOT NULL DEFAULT 0,
+                `ReceivedCommandsCount` BIGINT NOT NULL DEFAULT 0,
+                `MovedUsersCount` BIGINT NOT NULL DEFAULT 0,
+                `ServerId` BIGINT,
+                `CreatedAt` DATETIME(6),
+                `LastModifiedAt` DATETIME(6),
+                FOREIGN KEY (`ServerId`) REFERENCES Servers(`ServerId`),
+                PRIMARY KEY(`ClientId`)
+            );
+            """)
+        )
+
+        self._cursor.execute(
+            str(f"""
+            CREATE TABLE IF NOT EXISTS `KnownUsers` (
+                `KnownUserId` BIGINT NOT NULL AUTO_INCREMENT,
+                `DiscordId` BIGINT NOT NULL,
+                `CreatedAt` DATETIME(6),
+                `LastModifiedAt` DATETIME(6),
+                PRIMARY KEY(`KnownUserId`)
+            );
+            """)
+        )
+
+        self._cursor.execute(
+            str(f"""
+            CREATE TABLE IF NOT EXISTS `UserJoinedServers` (
+                `JoinId` BIGINT NOT NULL AUTO_INCREMENT,
+                `UserId` BIGINT NOT NULL,
+                `JoinedOn` DATETIME(6) NOT NULL,
+                `LeavedOn` DATETIME(6),
+                `CreatedAt` DATETIME(6),
+                `LastModifiedAt` DATETIME(6),
+                FOREIGN KEY (`UserId`) REFERENCES Users(`UserId`),
+                PRIMARY KEY(`JoinId`)
+            );
+            """)
+        )
+
+    def downgrade(self):
+        self._cursor.execute('DROP TABLE `Clients`;')
+        self._cursor.execute('DROP TABLE `KnownUsers`;')
+        self._cursor.execute('DROP TABLE `UserJoinedServers`;')

src/gismo_data/model/migration_history.py

@@ -0,0 +1,47 @@
+from cpl_core.database import TableABC
+
+
+class MigrationHistory(TableABC):
+
+    def __init__(self, id: str):
+        self._id = id
+
+        TableABC.__init__(self)
+    
+    @property
+    def migration_id(self) -> str:
+        return self._id
+
+    @staticmethod
+    def get_select_by_id_string(id: str) -> str:
+        return str(f"""
+            SELECT * FROM `MigrationHistory`
+            WHERE `MigrationId` = '{id}';
+        """)
+
+    @property
+    def insert_string(self) -> str:
+        return str(f"""
+            INSERT INTO `MigrationHistory` (
+                `MigrationId`, `CreatedAt`, `LastModifiedAt`
+            ) VALUES (
+                '{self._id}',
+                '{self._created_at}',
+                '{self._modified_at}'
+            );
+        """)
+
+    @property
+    def udpate_string(self) -> str:
+        return str(f"""
+            UPDATE `MigrationHistory`
+            SET LastModifiedAt` = '{self._modified_at}'
+            WHERE `MigrationId` = '{self._id}';
+        """)
+
+    @property
+    def delete_string(self) -> str:
+        return str(f"""
+            DELETE FROM `MigrationHistory`
+            WHERE `MigrationId` = '{self._id}';
+        """)

src/gismo_data/service/migration_service.py

@@ -0,0 +1,43 @@
+from cpl_core.database.context import DatabaseContextABC
+from cpl_core.dependency_injection import ServiceProviderABC
+from cpl_core.logging import LoggerABC
+
+from gismo_data.abc.migration_abc import MigrationABC
+from gismo_data.model.migration_history import MigrationHistory
+
+
+class MigrationService:
+
+    def __init__(self, logger: LoggerABC, services: ServiceProviderABC, db: DatabaseContextABC):
+        self._logger = logger
+        self._services = services
+        
+        self._db = db
+        self._cursor = db.cursor
+
+        self._migrations: list[MigrationABC] = MigrationABC.__subclasses__()
+    
+    def migrate(self):
+        self._logger.info(__name__, f"Running Migrations")
+        for migration in self._migrations:
+            migration_id = migration.__name__
+            try:
+                # check if table exists
+                self._cursor.execute("SHOW TABLES LIKE 'MigrationHistory'")
+                result = self._cursor.fetchone()
+                if result:
+                    # there is a table named "tableName"
+                    self._logger.trace(__name__, f"Running SQL Command: {MigrationHistory.get_select_by_id_string(migration_id)}")
+                    migration_from_db: MigrationHistory = self._db.select(MigrationHistory.get_select_by_id_string(migration_id))
+                    self._logger.trace(__name__, migration_from_db)
+                    if migration_from_db is not None and len(migration_from_db) > 0:
+                        continue
+                
+                self._logger.debug(__name__, f"Running Migration {migration}")
+                migration_as_service: MigrationABC = self._services.get_service(migration)
+                migration_as_service.upgrade()
+                self._cursor.execute(MigrationHistory(migration_id).insert_string)
+                self._db.save_changes()
+
+            except Exception as e:
+                self._logger.error(__name__, f'Cannot get migration with id {migration}', e)