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// _ _
// __ _____ __ ___ ___ __ _| |_ ___
// \ \ /\ / / _ \/ _` \ \ / / |/ _` | __/ _ \
// \ V V / __/ (_| |\ V /| | (_| | || __/
// \_/\_/ \___|\__,_| \_/ |_|\__,_|\__\___|
//
// Copyright © 2016 - 2024 Weaviate B.V. All rights reserved.
//
// CONTACT: [email protected]
//
package nearText
import (
"context"
"github.com/go-openapi/strfmt"
"github.com/pkg/errors"
"github.com/weaviate/weaviate/entities/modulecapabilities"
"github.com/weaviate/weaviate/entities/moduletools"
"github.com/weaviate/weaviate/entities/schema/crossref"
libvectorizer "github.com/weaviate/weaviate/usecases/vectorizer"
)
type Searcher struct {
vectorizer vectorizer
movements *movements
}
func NewSearcher(vectorizer vectorizer) *Searcher {
return &Searcher{vectorizer, newMovements()}
}
type vectorizer interface {
Texts(ctx context.Context, input []string, cfg moduletools.ClassConfig) ([]float32, error)
}
func (s *Searcher) VectorSearches() map[string]modulecapabilities.VectorForParams {
vectorSearches := map[string]modulecapabilities.VectorForParams{}
vectorSearches["nearText"] = s.vectorForNearTextParam
return vectorSearches
}
func (s *Searcher) vectorForNearTextParam(ctx context.Context, params interface{}, className string,
findVectorFn modulecapabilities.FindVectorFn,
cfg moduletools.ClassConfig,
) ([]float32, error) {
return s.vectorFromNearTextParam(ctx, params.(*NearTextParams), className, findVectorFn, cfg)
}
func (s *Searcher) vectorFromNearTextParam(ctx context.Context,
params *NearTextParams, className string, findVectorFn modulecapabilities.FindVectorFn,
cfg moduletools.ClassConfig,
) ([]float32, error) {
tenant := cfg.Tenant()
vector, err := s.vectorizer.Texts(ctx, params.Values, cfg)
if err != nil {
return nil, errors.Errorf("vectorize keywords: %v", err)
}
moveTo := params.MoveTo
if moveTo.Force > 0 && (len(moveTo.Values) > 0 || len(moveTo.Objects) > 0) {
moveToVector, err := s.vectorFromValuesAndObjects(ctx, moveTo.Values,
moveTo.Objects, className, findVectorFn, cfg, tenant)
if err != nil {
return nil, errors.Errorf("vectorize move to: %v", err)
}
afterMoveTo, err := s.movements.MoveTo(vector, moveToVector, moveTo.Force)
if err != nil {
return nil, err
}
vector = afterMoveTo
}
moveAway := params.MoveAwayFrom
if moveAway.Force > 0 && (len(moveAway.Values) > 0 || len(moveAway.Objects) > 0) {
moveAwayVector, err := s.vectorFromValuesAndObjects(ctx, moveAway.Values,
moveAway.Objects, className, findVectorFn, cfg, tenant)
if err != nil {
return nil, errors.Errorf("vectorize move away from: %v", err)
}
afterMoveFrom, err := s.movements.MoveAwayFrom(vector, moveAwayVector, moveAway.Force)
if err != nil {
return nil, err
}
vector = afterMoveFrom
}
return vector, nil
}
func (s *Searcher) vectorFromValuesAndObjects(ctx context.Context,
values []string, objects []ObjectMove,
className string,
findVectorFn modulecapabilities.FindVectorFn,
cfg moduletools.ClassConfig, tenant string,
) ([]float32, error) {
var objectVectors [][]float32
if len(values) > 0 {
moveToVector, err := s.vectorizer.Texts(ctx, values, cfg)
if err != nil {
return nil, errors.Errorf("vectorize move to: %v", err)
}
objectVectors = append(objectVectors, moveToVector)
}
if len(objects) > 0 {
var id strfmt.UUID
for _, obj := range objects {
if len(obj.ID) > 0 {
id = strfmt.UUID(obj.ID)
}
if len(obj.Beacon) > 0 {
ref, err := crossref.Parse(obj.Beacon)
if err != nil {
return nil, err
}
id = ref.TargetID
}
vector, err := findVectorFn(ctx, className, id, tenant)
if err != nil {
return nil, err
}
objectVectors = append(objectVectors, vector)
}
}
return libvectorizer.CombineVectors(objectVectors), nil
}
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