feat(plugins): package database, cache, logger, and storage as infra plugins

plugins/infra/database/plugin.go

@@ -0,0 +1,99 @@
+// Package database provides the relational database infrastructure plugin for Cordis.
+package database
+
+import (
+	"context"
+
+	"github.com/Rain-kl/Wavelet/core"
+	"github.com/Rain-kl/Wavelet/core/contracts"
+	"github.com/Rain-kl/Wavelet/internal/infra/persistence"
+	"gorm.io/gorm"
+)
+
+// Option configures the database plugin.
+type Option func(*Plugin)
+
+// WithDB configures an explicit *gorm.DB instance for the plugin.
+func WithDB(d *gorm.DB) Option {
+	return func(p *Plugin) {
+		p.db = d
+	}
+}
+
+// WithNamedDB registers a named secondary database connection.
+func WithNamedDB(name string, d *gorm.DB) Option {
+	return func(p *Plugin) {
+		if p.namedDBs == nil {
+			p.namedDBs = make(map[string]*gorm.DB)
+		}
+		p.namedDBs[name] = d
+	}
+}
+
+// Plugin implements core.Plugin to provide contracts.DBService into the Cordis micro-kernel.
+type Plugin struct {
+	db       *gorm.DB
+	namedDBs map[string]*gorm.DB
+}
+
+// New creates a new database infrastructure plugin.
+func New(opts ...Option) *Plugin {
+	p := &Plugin{
+		namedDBs: make(map[string]*gorm.DB),
+	}
+	for _, opt := range opts {
+		if opt != nil {
+			opt(p)
+		}
+	}
+	return p
+}
+
+// Name returns the unique identifier of the database plugin.
+func (p *Plugin) Name() string {
+	return "database"
+}
+
+// Apply mounts the database service into the Context.
+func (p *Plugin) Apply(ctx *core.Context) error {
+	targetDB := p.db
+	if targetDB == nil {
+		targetDB = db.DB(context.Background())
+	}
+
+	svc := &dbServiceImpl{
+		primary:  targetDB,
+		namedDBs: p.namedDBs,
+	}
+
+	core.Provide[contracts.DBService](ctx, svc)
+	return nil
+}
+
+type dbServiceImpl struct {
+	primary  *gorm.DB
+	namedDBs map[string]*gorm.DB
+}
+
+func (s *dbServiceImpl) GORM() *gorm.DB {
+	if s.primary != nil {
+		return s.primary
+	}
+	return db.DB(context.Background())
+}
+
+func (s *dbServiceImpl) DB(ctx context.Context) *gorm.DB {
+	if s.primary != nil {
+		return s.primary.WithContext(ctx)
+	}
+	return db.DB(ctx)
+}
+
+func (s *dbServiceImpl) Named(name string) *gorm.DB {
+	if s.namedDBs != nil {
+		if d, ok := s.namedDBs[name]; ok && d != nil {
+			return d
+		}
+	}
+	return s.GORM()
+}

plugins/infra/database/plugin_test.go

@@ -0,0 +1,62 @@
+// Copyright 2026 Arctel.net
+// SPDX-License-Identifier: Apache-2.0
+
+package database_test
+
+import (
+	"context"
+	"path/filepath"
+	"testing"
+
+	"github.com/glebarez/sqlite"
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+	"gorm.io/gorm"
+
+	"github.com/Rain-kl/Wavelet/core"
+	"github.com/Rain-kl/Wavelet/core/contracts"
+	"github.com/Rain-kl/Wavelet/plugins/infra/database"
+)
+
+type Item struct {
+	ID   uint64 `gorm:"primaryKey"`
+	Name string
+}
+
+func TestDatabasePlugin(t *testing.T) {
+	dbPath := filepath.Join(t.TempDir(), "db_test.db")
+	gdb, err := gorm.Open(sqlite.Open(dbPath), &gorm.Config{})
+	require.NoError(t, err)
+	require.NoError(t, gdb.AutoMigrate(&Item{}))
+
+	namedPath := filepath.Join(t.TempDir(), "named_test.db")
+	namedDB, err := gorm.Open(sqlite.Open(namedPath), &gorm.Config{})
+	require.NoError(t, err)
+	require.NoError(t, namedDB.AutoMigrate(&Item{}))
+
+	p := database.New(
+		database.WithDB(gdb),
+		database.WithNamedDB("analytics", namedDB),
+	)
+	assert.Equal(t, "database", p.Name())
+
+	ctx := core.NewContext(context.Background())
+	require.NoError(t, p.Apply(ctx))
+
+	svc, err := core.Inject[contracts.DBService](ctx)
+	require.NoError(t, err)
+	require.NotNil(t, svc)
+
+	assert.Equal(t, gdb, svc.GORM())
+	assert.NotNil(t, svc.DB(context.Background()))
+	assert.Equal(t, namedDB, svc.Named("analytics"))
+	assert.Equal(t, gdb, svc.Named("non_existent"))
+
+	// Verify DB write
+	item := Item{ID: 1, Name: "TestItem"}
+	require.NoError(t, svc.DB(context.Background()).Create(&item).Error)
+
+	var retrieved Item
+	require.NoError(t, svc.GORM().First(&retrieved, 1).Error)
+	assert.Equal(t, "TestItem", retrieved.Name)
+}