[full-ci] experimental search backport (#5221)

* experimental search backport
fix basic extractor resource name
move escapeQuery regex into global variable
minor pr review changes
rename DebounceDuration env variable
add document title and content when rebuilding bleve resource

Co-authored-by: David Christofas <dchristofas@owncloud.com>

services/search/pkg/content/basic.go

@@ -0,0 +1,41 @@
+package content
+
+import (
+	"context"
+	"time"
+
+	storageProvider "github.com/cs3org/go-cs3apis/cs3/storage/provider/v1beta1"
+	//"github.com/cs3org/reva/v2/pkg/tags"
+	"github.com/owncloud/ocis/v2/ocis-pkg/log"
+)
+
+// Basic is the simplest Extractor implementation.
+type Basic struct {
+	logger log.Logger
+}
+
+// NewBasicExtractor creates a new Basic instance.
+func NewBasicExtractor(logger log.Logger) (*Basic, error) {
+	return &Basic{logger: logger}, nil
+}
+
+// Extract literally just rearranges the inputs and processes them into a Document.
+func (b Basic) Extract(_ context.Context, ri *storageProvider.ResourceInfo) (Document, error) {
+	doc := Document{
+		Name:     ri.Name,
+		Size:     ri.Size,
+		MimeType: ri.MimeType,
+	}
+
+	//if m := ri.ArbitraryMetadata.GetMetadata(); m != nil {
+	//if t, ok := m["tags"]; ok {
+	//doc.Tags = tags.FromList(t).AsSlice()
+	//}
+	//}
+
+	if ri.Mtime != nil {
+		doc.Mtime = time.Unix(int64(ri.Mtime.Seconds), int64(ri.Mtime.Nanos)).UTC().Format(time.RFC3339)
+	}
+
+	return doc, nil
+}