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_get_template.go

@@ -0,0 +1,184 @@
+// 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"
+	"fmt"
+	"net/http"
+	"net/url"
+	"strings"
+
+	"github.com/olivere/elastic/v7/uritemplates"
+)
+
+// IndicesGetTemplateService returns an index template.
+// See https://www.elastic.co/guide/en/elasticsearch/reference/7.0/indices-templates.html.
+type IndicesGetTemplateService 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
+
+	name         []string
+	flatSettings *bool
+	local        *bool
+}
+
+// NewIndicesGetTemplateService creates a new IndicesGetTemplateService.
+func NewIndicesGetTemplateService(client *Client) *IndicesGetTemplateService {
+	return &IndicesGetTemplateService{
+		client: client,
+		name:   make([]string, 0),
+	}
+}
+
+// Pretty tells Elasticsearch whether to return a formatted JSON response.
+func (s *IndicesGetTemplateService) Pretty(pretty bool) *IndicesGetTemplateService {
+	s.pretty = &pretty
+	return s
+}
+
+// Human specifies whether human readable values should be returned in
+// the JSON response, e.g. "7.5mb".
+func (s *IndicesGetTemplateService) Human(human bool) *IndicesGetTemplateService {
+	s.human = &human
+	return s
+}
+
+// ErrorTrace specifies whether to include the stack trace of returned errors.
+func (s *IndicesGetTemplateService) ErrorTrace(errorTrace bool) *IndicesGetTemplateService {
+	s.errorTrace = &errorTrace
+	return s
+}
+
+// FilterPath specifies a list of filters used to reduce the response.
+func (s *IndicesGetTemplateService) FilterPath(filterPath ...string) *IndicesGetTemplateService {
+	s.filterPath = filterPath
+	return s
+}
+
+// Header adds a header to the request.
+func (s *IndicesGetTemplateService) Header(name string, value string) *IndicesGetTemplateService {
+	if s.headers == nil {
+		s.headers = http.Header{}
+	}
+	s.headers.Add(name, value)
+	return s
+}
+
+// Headers specifies the headers of the request.
+func (s *IndicesGetTemplateService) Headers(headers http.Header) *IndicesGetTemplateService {
+	s.headers = headers
+	return s
+}
+
+// Name is the name of the index template.
+func (s *IndicesGetTemplateService) Name(name ...string) *IndicesGetTemplateService {
+	s.name = append(s.name, name...)
+	return s
+}
+
+// FlatSettings is returns settings in flat format (default: false).
+func (s *IndicesGetTemplateService) FlatSettings(flatSettings bool) *IndicesGetTemplateService {
+	s.flatSettings = &flatSettings
+	return s
+}
+
+// Local indicates whether to return local information, i.e. do not retrieve
+// the state from master node (default: false).
+func (s *IndicesGetTemplateService) Local(local bool) *IndicesGetTemplateService {
+	s.local = &local
+	return s
+}
+
+// buildURL builds the URL for the operation.
+func (s *IndicesGetTemplateService) buildURL() (string, url.Values, error) {
+	// Build URL
+	var err error
+	var path string
+	if len(s.name) > 0 {
+		path, err = uritemplates.Expand("/_template/{name}", map[string]string{
+			"name": strings.Join(s.name, ","),
+		})
+	} else {
+		path = "/_template"
+	}
+	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.flatSettings != nil {
+		params.Set("flat_settings", fmt.Sprintf("%v", *s.flatSettings))
+	}
+	if s.local != nil {
+		params.Set("local", fmt.Sprintf("%v", *s.local))
+	}
+	return path, params, nil
+}
+
+// Validate checks if the operation is valid.
+func (s *IndicesGetTemplateService) Validate() error {
+	return nil
+}
+
+// Do executes the operation.
+func (s *IndicesGetTemplateService) Do(ctx context.Context) (map[string]*IndicesGetTemplateResponse, 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
+	}
+
+	// Get HTTP response
+	res, err := s.client.PerformRequest(ctx, PerformRequestOptions{
+		Method:  "GET",
+		Path:    path,
+		Params:  params,
+		Headers: s.headers,
+	})
+	if err != nil {
+		return nil, err
+	}
+
+	// Return operation response
+	var ret map[string]*IndicesGetTemplateResponse
+	if err := s.client.decoder.Decode(res.Body, &ret); err != nil {
+		return nil, err
+	}
+	return ret, nil
+}
+
+// IndicesGetTemplateResponse is the response of IndicesGetTemplateService.Do.
+type IndicesGetTemplateResponse struct {
+	Order         int                    `json:"order,omitempty"`
+	Version       int                    `json:"version,omitempty"`
+	IndexPatterns []string               `json:"index_patterns,omitempty"`
+	Settings      map[string]interface{} `json:"settings,omitempty"`
+	Mappings      map[string]interface{} `json:"mappings,omitempty"`
+	Aliases       map[string]interface{} `json:"aliases,omitempty"`
+}