Complete backend infrastructure and authentication system

Co-authored-by: mblanke <9078342+mblanke@users.noreply.github.com>

backend/alembic/README

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+Generic single-database configuration.

backend/alembic/env.py

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+from logging.config import fileConfig
+import sys
+from pathlib import Path
+
+from sqlalchemy import engine_from_config
+from sqlalchemy import pool
+
+from alembic import context
+
+# Add app directory to Python path
+sys.path.insert(0, str(Path(__file__).resolve().parent.parent))
+
+# Import models and database
+from app.core.database import Base
+from app.core.config import settings
+
+# Import all models to ensure they're registered with Base
+from app.models.tenant import Tenant
+from app.models.user import User
+from app.models.host import Host
+from app.models.case import Case
+from app.models.artifact import Artifact
+
+# this is the Alembic Config object, which provides
+# access to the values within the .ini file in use.
+config = context.config
+
+# Set the database URL from settings
+config.set_main_option("sqlalchemy.url", settings.database_url)
+
+# Interpret the config file for Python logging.
+# This line sets up loggers basically.
+if config.config_file_name is not None:
+    fileConfig(config.config_file_name)
+
+# add your model's MetaData object here
+# for 'autogenerate' support
+target_metadata = Base.metadata
+
+# other values from the config, defined by the needs of env.py,
+# can be acquired:
+# my_important_option = config.get_main_option("my_important_option")
+# ... etc.
+
+
+def run_migrations_offline() -> None:
+    """Run migrations in 'offline' mode.
+
+    This configures the context with just a URL
+    and not an Engine, though an Engine is acceptable
+    here as well.  By skipping the Engine creation
+    we don't even need a DBAPI to be available.
+
+    Calls to context.execute() here emit the given string to the
+    script output.
+
+    """
+    url = config.get_main_option("sqlalchemy.url")
+    context.configure(
+        url=url,
+        target_metadata=target_metadata,
+        literal_binds=True,
+        dialect_opts={"paramstyle": "named"},
+    )
+
+    with context.begin_transaction():
+        context.run_migrations()
+
+
+def run_migrations_online() -> None:
+    """Run migrations in 'online' mode.
+
+    In this scenario we need to create an Engine
+    and associate a connection with the context.
+
+    """
+    connectable = engine_from_config(
+        config.get_section(config.config_ini_section, {}),
+        prefix="sqlalchemy.",
+        poolclass=pool.NullPool,
+    )
+
+    with connectable.connect() as connection:
+        context.configure(
+            connection=connection, target_metadata=target_metadata
+        )
+
+        with context.begin_transaction():
+            context.run_migrations()
+
+
+if context.is_offline_mode():
+    run_migrations_offline()
+else:
+    run_migrations_online()

backend/alembic/script.py.mako

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+"""${message}
+
+Revision ID: ${up_revision}
+Revises: ${down_revision | comma,n}
+Create Date: ${create_date}
+
+"""
+from typing import Sequence, Union
+
+from alembic import op
+import sqlalchemy as sa
+${imports if imports else ""}
+
+# revision identifiers, used by Alembic.
+revision: str = ${repr(up_revision)}
+down_revision: Union[str, Sequence[str], None] = ${repr(down_revision)}
+branch_labels: Union[str, Sequence[str], None] = ${repr(branch_labels)}
+depends_on: Union[str, Sequence[str], None] = ${repr(depends_on)}
+
+
+def upgrade() -> None:
+    """Upgrade schema."""
+    ${upgrades if upgrades else "pass"}
+
+
+def downgrade() -> None:
+    """Downgrade schema."""
+    ${downgrades if downgrades else "pass"}

backend/alembic/versions/f82b3092d056_initial_migration.py

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+"""Initial migration
+
+Revision ID: f82b3092d056
+Revises: 
+Create Date: 2025-12-09 14:25:47.222289
+
+"""
+from typing import Sequence, Union
+
+from alembic import op
+import sqlalchemy as sa
+
+
+# revision identifiers, used by Alembic.
+revision: str = 'f82b3092d056'
+down_revision: Union[str, Sequence[str], None] = None
+branch_labels: Union[str, Sequence[str], None] = None
+depends_on: Union[str, Sequence[str], None] = None
+
+
+def upgrade() -> None:
+    """Upgrade schema."""
+    # Create tenants table
+    op.create_table(
+        'tenants',
+        sa.Column('id', sa.Integer(), nullable=False),
+        sa.Column('name', sa.String(), nullable=False),
+        sa.Column('description', sa.String(), nullable=True),
+        sa.Column('created_at', sa.DateTime(), nullable=True),
+        sa.PrimaryKeyConstraint('id')
+    )
+    op.create_index(op.f('ix_tenants_id'), 'tenants', ['id'], unique=False)
+    op.create_index(op.f('ix_tenants_name'), 'tenants', ['name'], unique=True)
+
+    # Create users table
+    op.create_table(
+        'users',
+        sa.Column('id', sa.Integer(), nullable=False),
+        sa.Column('username', sa.String(), nullable=False),
+        sa.Column('password_hash', sa.String(), nullable=False),
+        sa.Column('role', sa.String(), nullable=False),
+        sa.Column('tenant_id', sa.Integer(), nullable=False),
+        sa.Column('is_active', sa.Boolean(), nullable=False),
+        sa.Column('created_at', sa.DateTime(), nullable=True),
+        sa.ForeignKeyConstraint(['tenant_id'], ['tenants.id'], ),
+        sa.PrimaryKeyConstraint('id')
+    )
+    op.create_index(op.f('ix_users_id'), 'users', ['id'], unique=False)
+    op.create_index(op.f('ix_users_username'), 'users', ['username'], unique=True)
+
+    # Create hosts table
+    op.create_table(
+        'hosts',
+        sa.Column('id', sa.Integer(), nullable=False),
+        sa.Column('hostname', sa.String(), nullable=False),
+        sa.Column('ip_address', sa.String(), nullable=True),
+        sa.Column('os', sa.String(), nullable=True),
+        sa.Column('tenant_id', sa.Integer(), nullable=False),
+        sa.Column('host_metadata', sa.JSON(), nullable=True),
+        sa.Column('created_at', sa.DateTime(), nullable=True),
+        sa.Column('last_seen', sa.DateTime(), nullable=True),
+        sa.ForeignKeyConstraint(['tenant_id'], ['tenants.id'], ),
+        sa.PrimaryKeyConstraint('id')
+    )
+    op.create_index(op.f('ix_hosts_id'), 'hosts', ['id'], unique=False)
+    op.create_index(op.f('ix_hosts_hostname'), 'hosts', ['hostname'], unique=False)
+
+    # Create cases table
+    op.create_table(
+        'cases',
+        sa.Column('id', sa.Integer(), nullable=False),
+        sa.Column('title', sa.String(), nullable=False),
+        sa.Column('description', sa.Text(), nullable=True),
+        sa.Column('status', sa.String(), nullable=False),
+        sa.Column('severity', sa.String(), nullable=True),
+        sa.Column('tenant_id', sa.Integer(), nullable=False),
+        sa.Column('created_at', sa.DateTime(), nullable=True),
+        sa.Column('updated_at', sa.DateTime(), nullable=True),
+        sa.ForeignKeyConstraint(['tenant_id'], ['tenants.id'], ),
+        sa.PrimaryKeyConstraint('id')
+    )
+    op.create_index(op.f('ix_cases_id'), 'cases', ['id'], unique=False)
+
+    # Create artifacts table
+    op.create_table(
+        'artifacts',
+        sa.Column('id', sa.Integer(), nullable=False),
+        sa.Column('artifact_type', sa.String(), nullable=False),
+        sa.Column('value', sa.String(), nullable=False),
+        sa.Column('description', sa.Text(), nullable=True),
+        sa.Column('case_id', sa.Integer(), nullable=True),
+        sa.Column('artifact_metadata', sa.JSON(), nullable=True),
+        sa.Column('created_at', sa.DateTime(), nullable=True),
+        sa.ForeignKeyConstraint(['case_id'], ['cases.id'], ),
+        sa.PrimaryKeyConstraint('id')
+    )
+    op.create_index(op.f('ix_artifacts_id'), 'artifacts', ['id'], unique=False)
+
+
+def downgrade() -> None:
+    """Downgrade schema."""
+    op.drop_index(op.f('ix_artifacts_id'), table_name='artifacts')
+    op.drop_table('artifacts')
+    op.drop_index(op.f('ix_cases_id'), table_name='cases')
+    op.drop_table('cases')
+    op.drop_index(op.f('ix_hosts_hostname'), table_name='hosts')
+    op.drop_index(op.f('ix_hosts_id'), table_name='hosts')
+    op.drop_table('hosts')
+    op.drop_index(op.f('ix_users_username'), table_name='users')
+    op.drop_index(op.f('ix_users_id'), table_name='users')
+    op.drop_table('users')
+    op.drop_index(op.f('ix_tenants_name'), table_name='tenants')
+    op.drop_index(op.f('ix_tenants_id'), table_name='tenants')
+    op.drop_table('tenants')