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/indices_rollover.go

@@ -0,0 +1,324 @@
+// 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
+
+import (
+	"context"
+	"encoding/json"
+	"fmt"
+	"net/http"
+	"net/url"
+	"strings"
+
+	"github.com/olivere/elastic/v7/uritemplates"
+)
+
+// IndicesRolloverService rolls an alias over to a new index when the
+// existing index is considered to be too large or too old.
+//
+// It is documented at
+// https://www.elastic.co/guide/en/elasticsearch/reference/7.0/indices-rollover-index.html.
+type IndicesRolloverService struct {
+	client *Client
+
+	pretty     *bool       // pretty format the returned JSON response
+	human      *bool       // return human readable values for statistics
+	errorTrace *bool       // include the stack trace of returned errors
+	filterPath []string    // list of filters used to reduce the response
+	headers    http.Header // custom request-level HTTP headers
+
+	dryRun              bool
+	newIndex            string
+	alias               string
+	masterTimeout       string
+	timeout             string
+	waitForActiveShards string
+	conditions          map[string]interface{}
+	settings            map[string]interface{}
+	mappings            map[string]interface{}
+	bodyJson            interface{}
+	bodyString          string
+}
+
+// NewIndicesRolloverService creates a new IndicesRolloverService.
+func NewIndicesRolloverService(client *Client) *IndicesRolloverService {
+	return &IndicesRolloverService{
+		client:     client,
+		conditions: make(map[string]interface{}),
+		settings:   make(map[string]interface{}),
+		mappings:   make(map[string]interface{}),
+	}
+}
+
+// Pretty tells Elasticsearch whether to return a formatted JSON response.
+func (s *IndicesRolloverService) Pretty(pretty bool) *IndicesRolloverService {
+	s.pretty = &pretty
+	return s
+}
+
+// Human specifies whether human readable values should be returned in
+// the JSON response, e.g. "7.5mb".
+func (s *IndicesRolloverService) Human(human bool) *IndicesRolloverService {
+	s.human = &human
+	return s
+}
+
+// ErrorTrace specifies whether to include the stack trace of returned errors.
+func (s *IndicesRolloverService) ErrorTrace(errorTrace bool) *IndicesRolloverService {
+	s.errorTrace = &errorTrace
+	return s
+}
+
+// FilterPath specifies a list of filters used to reduce the response.
+func (s *IndicesRolloverService) FilterPath(filterPath ...string) *IndicesRolloverService {
+	s.filterPath = filterPath
+	return s
+}
+
+// Header adds a header to the request.
+func (s *IndicesRolloverService) Header(name string, value string) *IndicesRolloverService {
+	if s.headers == nil {
+		s.headers = http.Header{}
+	}
+	s.headers.Add(name, value)
+	return s
+}
+
+// Headers specifies the headers of the request.
+func (s *IndicesRolloverService) Headers(headers http.Header) *IndicesRolloverService {
+	s.headers = headers
+	return s
+}
+
+// Alias is the name of the alias to rollover.
+func (s *IndicesRolloverService) Alias(alias string) *IndicesRolloverService {
+	s.alias = alias
+	return s
+}
+
+// NewIndex is the name of the rollover index.
+func (s *IndicesRolloverService) NewIndex(newIndex string) *IndicesRolloverService {
+	s.newIndex = newIndex
+	return s
+}
+
+// MasterTimeout specifies the timeout for connection to master.
+func (s *IndicesRolloverService) MasterTimeout(masterTimeout string) *IndicesRolloverService {
+	s.masterTimeout = masterTimeout
+	return s
+}
+
+// Timeout sets an explicit operation timeout.
+func (s *IndicesRolloverService) Timeout(timeout string) *IndicesRolloverService {
+	s.timeout = timeout
+	return s
+}
+
+// WaitForActiveShards sets the number of active shards to wait for on the
+// newly created rollover index before the operation returns.
+func (s *IndicesRolloverService) WaitForActiveShards(waitForActiveShards string) *IndicesRolloverService {
+	s.waitForActiveShards = waitForActiveShards
+	return s
+}
+
+// DryRun, when set, specifies that only conditions are checked without
+// performing the actual rollover.
+func (s *IndicesRolloverService) DryRun(dryRun bool) *IndicesRolloverService {
+	s.dryRun = dryRun
+	return s
+}
+
+// Conditions allows to specify all conditions as a dictionary.
+func (s *IndicesRolloverService) Conditions(conditions map[string]interface{}) *IndicesRolloverService {
+	s.conditions = conditions
+	return s
+}
+
+// AddCondition adds a condition to the rollover decision.
+func (s *IndicesRolloverService) AddCondition(name string, value interface{}) *IndicesRolloverService {
+	s.conditions[name] = value
+	return s
+}
+
+// AddMaxIndexAgeCondition adds a condition to set the max index age.
+func (s *IndicesRolloverService) AddMaxIndexAgeCondition(time string) *IndicesRolloverService {
+	s.conditions["max_age"] = time
+	return s
+}
+
+// AddMaxIndexDocsCondition adds a condition to set the max documents in the index.
+func (s *IndicesRolloverService) AddMaxIndexDocsCondition(docs int64) *IndicesRolloverService {
+	s.conditions["max_docs"] = docs
+	return s
+}
+
+// Settings adds the index settings.
+func (s *IndicesRolloverService) Settings(settings map[string]interface{}) *IndicesRolloverService {
+	s.settings = settings
+	return s
+}
+
+// AddSetting adds an index setting.
+func (s *IndicesRolloverService) AddSetting(name string, value interface{}) *IndicesRolloverService {
+	s.settings[name] = value
+	return s
+}
+
+// Mappings adds the index mappings.
+func (s *IndicesRolloverService) Mappings(mappings map[string]interface{}) *IndicesRolloverService {
+	s.mappings = mappings
+	return s
+}
+
+// AddMapping adds a mapping for the given type.
+func (s *IndicesRolloverService) AddMapping(typ string, mapping interface{}) *IndicesRolloverService {
+	s.mappings[typ] = mapping
+	return s
+}
+
+// BodyJson sets the conditions that needs to be met for executing rollover,
+// specified as a serializable JSON instance which is sent as the body of
+// the request.
+func (s *IndicesRolloverService) BodyJson(body interface{}) *IndicesRolloverService {
+	s.bodyJson = body
+	return s
+}
+
+// BodyString sets the conditions that needs to be met for executing rollover,
+// specified as a string which is sent as the body of the request.
+func (s *IndicesRolloverService) BodyString(body string) *IndicesRolloverService {
+	s.bodyString = body
+	return s
+}
+
+// getBody returns the body of the request, if not explicitly set via
+// BodyJson or BodyString.
+func (s *IndicesRolloverService) getBody() interface{} {
+	body := make(map[string]interface{})
+	if len(s.conditions) > 0 {
+		body["conditions"] = s.conditions
+	}
+	if len(s.settings) > 0 {
+		body["settings"] = s.settings
+	}
+	if len(s.mappings) > 0 {
+		body["mappings"] = s.mappings
+	}
+	return body
+}
+
+// buildURL builds the URL for the operation.
+func (s *IndicesRolloverService) buildURL() (string, url.Values, error) {
+	// Build URL
+	var err error
+	var path string
+	if s.newIndex != "" {
+		path, err = uritemplates.Expand("/{alias}/_rollover/{new_index}", map[string]string{
+			"alias":     s.alias,
+			"new_index": s.newIndex,
+		})
+	} else {
+		path, err = uritemplates.Expand("/{alias}/_rollover", map[string]string{
+			"alias": s.alias,
+		})
+	}
+	if err != nil {
+		return "", url.Values{}, err
+	}
+
+	// Add query string parameters
+	params := url.Values{}
+	if v := s.pretty; v != nil {
+		params.Set("pretty", fmt.Sprint(*v))
+	}
+	if v := s.human; v != nil {
+		params.Set("human", fmt.Sprint(*v))
+	}
+	if v := s.errorTrace; v != nil {
+		params.Set("error_trace", fmt.Sprint(*v))
+	}
+	if len(s.filterPath) > 0 {
+		params.Set("filter_path", strings.Join(s.filterPath, ","))
+	}
+	if s.dryRun {
+		params.Set("dry_run", "true")
+	}
+	if s.masterTimeout != "" {
+		params.Set("master_timeout", s.masterTimeout)
+	}
+	if s.timeout != "" {
+		params.Set("timeout", s.timeout)
+	}
+	if s.waitForActiveShards != "" {
+		params.Set("wait_for_active_shards", s.waitForActiveShards)
+	}
+	return path, params, nil
+}
+
+// Validate checks if the operation is valid.
+func (s *IndicesRolloverService) Validate() error {
+	var invalid []string
+	if s.alias == "" {
+		invalid = append(invalid, "Alias")
+	}
+	if len(invalid) > 0 {
+		return fmt.Errorf("missing required fields: %v", invalid)
+	}
+	return nil
+}
+
+// Do executes the operation.
+func (s *IndicesRolloverService) Do(ctx context.Context) (*IndicesRolloverResponse, error) {
+	// Check pre-conditions
+	if err := s.Validate(); err != nil {
+		return nil, err
+	}
+
+	// Get URL for request
+	path, params, err := s.buildURL()
+	if err != nil {
+		return nil, err
+	}
+
+	// Setup HTTP request body
+	var body interface{}
+	if s.bodyJson != nil {
+		body = s.bodyJson
+	} else if s.bodyString != "" {
+		body = s.bodyString
+	} else {
+		body = s.getBody()
+	}
+
+	// Get HTTP response
+	res, err := s.client.PerformRequest(ctx, PerformRequestOptions{
+		Method:  "POST",
+		Path:    path,
+		Params:  params,
+		Body:    body,
+		Headers: s.headers,
+	})
+	if err != nil {
+		return nil, err
+	}
+
+	// Return operation response
+	ret := new(IndicesRolloverResponse)
+	if err := json.Unmarshal(res.Body, ret); err != nil {
+		return nil, err
+	}
+	return ret, nil
+}
+
+// IndicesRolloverResponse is the response of IndicesRolloverService.Do.
+type IndicesRolloverResponse struct {
+	OldIndex           string          `json:"old_index"`
+	NewIndex           string          `json:"new_index"`
+	RolledOver         bool            `json:"rolled_over"`
+	DryRun             bool            `json:"dry_run"`
+	Acknowledged       bool            `json:"acknowledged"`
+	ShardsAcknowledged bool            `json:"shards_acknowledged"`
+	Conditions         map[string]bool `json:"conditions"`
+}