chore: add peerfinder assets

pkg/es/driver/resolve-links/resolve-links.go

@@ -0,0 +1,121 @@
+package resolvelinks
+
+import (
+	"context"
+
+	"github.com/sour-is/ev/internal/lg"
+	"github.com/sour-is/ev/pkg/es"
+	"github.com/sour-is/ev/pkg/es/driver"
+	"github.com/sour-is/ev/pkg/es/event"
+)
+
+type resolvelinks struct {
+	up driver.Driver
+}
+
+func New() *resolvelinks {
+	return &resolvelinks{}
+}
+func (r *resolvelinks) Apply(es *es.EventStore) {
+	r.up = es.Driver
+	es.Driver = r
+}
+func (r *resolvelinks) Unwrap() driver.Driver {
+	return r.up
+}
+func (r *resolvelinks) Open(ctx context.Context, dsn string) (driver.Driver, error) {
+	ctx, span := lg.Span(ctx)
+	defer span.End()
+
+	return r.up.Open(ctx, dsn)
+}
+
+func (r *resolvelinks) EventLog(ctx context.Context, streamID string) (driver.EventLog, error) {
+	ctx, span := lg.Span(ctx)
+	defer span.End()
+
+	l, err := r.up.EventLog(ctx, streamID)
+	return &wrapper{l, r}, err
+}
+
+type wrapper struct {
+	up           driver.EventLog
+	resolvelinks *resolvelinks
+}
+
+func (w *wrapper) Read(ctx context.Context, after int64, count int64) (event.Events, error) {
+	ctx, span := lg.Span(ctx)
+	defer span.End()
+
+	events, err := w.up.Read(ctx, after, count)
+	if err != nil {
+		return nil, err
+	}
+
+	for i, e := range events {
+		switch e := e.(type) {
+		case *event.EventPtr:
+			d, err := w.resolvelinks.EventLog(ctx, e.StreamID)
+			if err != nil {
+				return nil, err
+			}
+			lis, err := d.ReadN(ctx, e.Pos)
+			if err != nil {
+				return nil, err
+			}
+
+			events[i] = lis.First()
+		}
+	}
+
+	return events, err
+}
+
+func (w *wrapper) ReadN(ctx context.Context, index ...uint64) (event.Events, error) {
+	ctx, span := lg.Span(ctx)
+	defer span.End()
+
+	events, err := w.up.ReadN(ctx, index...)
+	if err != nil {
+		return nil, err
+	}
+
+	for i, e := range events {
+		switch e := e.(type) {
+		case *event.EventPtr:
+			d, err := w.resolvelinks.EventLog(ctx, e.StreamID)
+			if err != nil {
+				return nil, err
+			}
+			lis, err := d.ReadN(ctx, e.Pos)
+			if err != nil {
+				return nil, err
+			}
+
+			events[i] = lis.First()
+		}
+	}
+
+	return events, err
+}
+
+func (w *wrapper) Append(ctx context.Context, events event.Events, version uint64) (uint64, error) {
+	ctx, span := lg.Span(ctx)
+	defer span.End()
+
+	return w.up.Append(ctx, events, version)
+}
+
+func (w *wrapper) FirstIndex(ctx context.Context) (uint64, error) {
+	ctx, span := lg.Span(ctx)
+	defer span.End()
+
+	return w.up.FirstIndex(ctx)
+}
+
+func (w *wrapper) LastIndex(ctx context.Context) (uint64, error) {
+	ctx, span := lg.Span(ctx)
+	defer span.End()
+
+	return w.up.LastIndex(ctx)
+}