Issue search support elasticsearch (#9428)

* Issue search support elasticsearch

* Fix lint

* Add indexer name on app.ini

* add a warnning on SearchIssuesByKeyword

* improve code

vendor/github.com/olivere/elastic/v7/bulk_delete_request.go

@@ -0,0 +1,186 @@
+// Copyright 2012-present Oliver Eilhard. All rights reserved.
+// Use of this source code is governed by a MIT-license.
+// See http://olivere.mit-license.org/license.txt for details.
+
+package elastic
+
+//go:generate easyjson bulk_delete_request.go
+
+import (
+	"encoding/json"
+	"fmt"
+	"strings"
+)
+
+// -- Bulk delete request --
+
+// BulkDeleteRequest is a request to remove a document from Elasticsearch.
+//
+// See https://www.elastic.co/guide/en/elasticsearch/reference/7.0/docs-bulk.html
+// for details.
+type BulkDeleteRequest struct {
+	BulkableRequest
+	index         string
+	typ           string
+	id            string
+	parent        string
+	routing       string
+	version       int64  // default is MATCH_ANY
+	versionType   string // default is "internal"
+	ifSeqNo       *int64
+	ifPrimaryTerm *int64
+
+	source []string
+
+	useEasyJSON bool
+}
+
+//easyjson:json
+type bulkDeleteRequestCommand map[string]bulkDeleteRequestCommandOp
+
+//easyjson:json
+type bulkDeleteRequestCommandOp struct {
+	Index         string `json:"_index,omitempty"`
+	Type          string `json:"_type,omitempty"`
+	Id            string `json:"_id,omitempty"`
+	Parent        string `json:"parent,omitempty"`
+	Routing       string `json:"routing,omitempty"`
+	Version       int64  `json:"version,omitempty"`
+	VersionType   string `json:"version_type,omitempty"`
+	IfSeqNo       *int64 `json:"if_seq_no,omitempty"`
+	IfPrimaryTerm *int64 `json:"if_primary_term,omitempty"`
+}
+
+// NewBulkDeleteRequest returns a new BulkDeleteRequest.
+func NewBulkDeleteRequest() *BulkDeleteRequest {
+	return &BulkDeleteRequest{}
+}
+
+// UseEasyJSON is an experimental setting that enables serialization
+// with github.com/mailru/easyjson, which should in faster serialization
+// time and less allocations, but removed compatibility with encoding/json,
+// usage of unsafe etc. See https://github.com/mailru/easyjson#issues-notes-and-limitations
+// for details. This setting is disabled by default.
+func (r *BulkDeleteRequest) UseEasyJSON(enable bool) *BulkDeleteRequest {
+	r.useEasyJSON = enable
+	return r
+}
+
+// Index specifies the Elasticsearch index to use for this delete request.
+// If unspecified, the index set on the BulkService will be used.
+func (r *BulkDeleteRequest) Index(index string) *BulkDeleteRequest {
+	r.index = index
+	r.source = nil
+	return r
+}
+
+// Type specifies the Elasticsearch type to use for this delete request.
+// If unspecified, the type set on the BulkService will be used.
+func (r *BulkDeleteRequest) Type(typ string) *BulkDeleteRequest {
+	r.typ = typ
+	r.source = nil
+	return r
+}
+
+// Id specifies the identifier of the document to delete.
+func (r *BulkDeleteRequest) Id(id string) *BulkDeleteRequest {
+	r.id = id
+	r.source = nil
+	return r
+}
+
+// Parent specifies the parent of the request, which is used in parent/child
+// mappings.
+func (r *BulkDeleteRequest) Parent(parent string) *BulkDeleteRequest {
+	r.parent = parent
+	r.source = nil
+	return r
+}
+
+// Routing specifies a routing value for the request.
+func (r *BulkDeleteRequest) Routing(routing string) *BulkDeleteRequest {
+	r.routing = routing
+	r.source = nil
+	return r
+}
+
+// Version indicates the version to be deleted as part of an optimistic
+// concurrency model.
+func (r *BulkDeleteRequest) Version(version int64) *BulkDeleteRequest {
+	r.version = version
+	r.source = nil
+	return r
+}
+
+// VersionType can be "internal" (default), "external", "external_gte",
+// or "external_gt".
+func (r *BulkDeleteRequest) VersionType(versionType string) *BulkDeleteRequest {
+	r.versionType = versionType
+	r.source = nil
+	return r
+}
+
+// IfSeqNo indicates to only perform the delete operation if the last
+// operation that has changed the document has the specified sequence number.
+func (r *BulkDeleteRequest) IfSeqNo(ifSeqNo int64) *BulkDeleteRequest {
+	r.ifSeqNo = &ifSeqNo
+	return r
+}
+
+// IfPrimaryTerm indicates to only perform the delete operation if the
+// last operation that has changed the document has the specified primary term.
+func (r *BulkDeleteRequest) IfPrimaryTerm(ifPrimaryTerm int64) *BulkDeleteRequest {
+	r.ifPrimaryTerm = &ifPrimaryTerm
+	return r
+}
+
+// String returns the on-wire representation of the delete request,
+// concatenated as a single string.
+func (r *BulkDeleteRequest) String() string {
+	lines, err := r.Source()
+	if err != nil {
+		return fmt.Sprintf("error: %v", err)
+	}
+	return strings.Join(lines, "\n")
+}
+
+// Source returns the on-wire representation of the delete request,
+// split into an action-and-meta-data line and an (optional) source line.
+// See https://www.elastic.co/guide/en/elasticsearch/reference/7.0/docs-bulk.html
+// for details.
+func (r *BulkDeleteRequest) Source() ([]string, error) {
+	if r.source != nil {
+		return r.source, nil
+	}
+	command := bulkDeleteRequestCommand{
+		"delete": bulkDeleteRequestCommandOp{
+			Index:         r.index,
+			Type:          r.typ,
+			Id:            r.id,
+			Routing:       r.routing,
+			Parent:        r.parent,
+			Version:       r.version,
+			VersionType:   r.versionType,
+			IfSeqNo:       r.ifSeqNo,
+			IfPrimaryTerm: r.ifPrimaryTerm,
+		},
+	}
+
+	var err error
+	var body []byte
+	if r.useEasyJSON {
+		// easyjson
+		body, err = command.MarshalJSON()
+	} else {
+		// encoding/json
+		body, err = json.Marshal(command)
+	}
+	if err != nil {
+		return nil, err
+	}
+
+	lines := []string{string(body)}
+	r.source = lines
+
+	return lines, nil
+}