go-transaction-manager

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package gorm
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import (
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	"context"
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	"gorm.io/gorm"
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	"github.com/avito-tech/go-transaction-manager/trm/v2"
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	trmcontext "github.com/avito-tech/go-transaction-manager/trm/v2/context"
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)
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// DefaultCtxGetter is the CtxGetter with settings.DefaultCtxKey.
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var DefaultCtxGetter = NewCtxGetter(trmcontext.DefaultManager)
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// CtxGetter gets Tr from trm.СtxManager by casting trm.Transaction to *gorm.DB.
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type CtxGetter struct {
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	ctxManager trm.СtxManager
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}
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// NewCtxGetter returns *CtxGetter to get *gorm.DB from context.Context.
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func NewCtxGetter(c trm.СtxManager) *CtxGetter {
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	return &CtxGetter{ctxManager: c}
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}
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// DefaultTrOrDB returns Tr(*gorm.DB) from context.Context or DB(*gorm.DB) otherwise.
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func (c *CtxGetter) DefaultTrOrDB(ctx context.Context, db *gorm.DB) *gorm.DB {
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	if tr := c.ctxManager.Default(ctx); tr != nil {
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		return c.convert(tr)
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	}
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	return db
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}
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// TrOrDB returns Tr(*gorm.DB) from context.Context by trm.CtxKey or DB(*gorm.DB) otherwise.
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func (c *CtxGetter) TrOrDB(ctx context.Context, key trm.CtxKey, db *gorm.DB) *gorm.DB {
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	if tr := c.ctxManager.ByKey(ctx, key); tr != nil {
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		return c.convert(tr)
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	}
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	return db
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}
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func (c *CtxGetter) convert(tr trm.Transaction) *gorm.DB {
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	if tx, ok := tr.Transaction().(*gorm.DB); ok {
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		return tx
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	}
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	return nil
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}
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