Add new component template APIs

This commit implements the new Component Template APIs which come with the new
Index Template APIs as described in
https://www.elastic.co/guide/en/elasticsearch/reference/7.9/index-templates.html.

Close #1414

Signed-off-by: Yann Soubeyrand <yann.soubeyrand@camptocamp.com>

client.go

@@ -1816,7 +1816,31 @@ func (c *Client) IndexDeleteIndexTemplate(name string) *IndicesDeleteIndexTempla
 	return NewIndicesDeleteIndexTemplateService(c).Name(name)
 }
 
-// -- TODO Component templates --
+// -- Component templates --
+
+// IndexPutComponentTemplate creates or updates a component template (available since 7.8).
+//
+// This service implements the component templates as described
+// on https://www.elastic.co/guide/en/elasticsearch/reference/7.10/indices-component-template.html.
+func (c *Client) IndexPutComponentTemplate(name string) *IndicesPutComponentTemplateService {
+	return NewIndicesPutComponentTemplateService(c).Name(name)
+}
+
+// IndexGetComponentTemplate returns a component template (available since 7.8).
+//
+// This service implements the component templates as described
+// on https://www.elastic.co/guide/en/elasticsearch/reference/7.10/getting-component-templates.html.
+func (c *Client) IndexGetComponentTemplate(name string) *IndicesGetComponentTemplateService {
+	return NewIndicesGetComponentTemplateService(c).Name(name)
+}
+
+// IndexDeleteComponentTemplate deletes a component template (available since 7.8).
+//
+// This service implements the component templates as described
+// on https://www.elastic.co/guide/en/elasticsearch/reference/7.10/indices-delete-component-template.html.
+func (c *Client) IndexDeleteComponentTemplate(name string) *IndicesDeleteComponentTemplateService {
+	return NewIndicesDeleteComponentTemplateService(c).Name(name)
+}
 
 // GetMapping gets a mapping.
 func (c *Client) GetMapping() *IndicesGetMappingService {

indices_component_templates_test.go

@@ -0,0 +1,67 @@
+// 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"
+	"testing"
+)
+
+func TestComponentTemplatesLifecycle(t *testing.T) {
+	client := setupTestClientAndCreateIndex(t)
+
+	const templateName = "template_1"
+
+	// Always make sure the component template is deleted
+	defer func() {
+		_, _ = client.IndexDeleteComponentTemplate(templateName).Pretty(true).Do(context.Background())
+	}()
+
+	// Create an component template
+	{
+		resp, err := client.IndexPutComponentTemplate(templateName).Pretty(true).BodyString(`{
+			"template": {
+				"settings": {
+					"number_of_shards": 2,
+					"number_of_replicas": 0
+				},
+				"mappings": {
+					"_source": { "enabled": true }
+				}
+			}
+		}`).Do(context.Background())
+		if err != nil {
+			t.Fatalf("expected to successfully create component template, got %v", err)
+		}
+		if resp == nil {
+			t.Fatal("expected response on creating component template")
+		}
+		if want, have := true, resp.Acknowledged; want != have {
+			t.Errorf("expected Acknowledged=%v, got %v", want, have)
+		}
+	}
+
+	// Get the component template
+	{
+		resp, err := client.IndexGetComponentTemplate(templateName).Pretty(true).Do(context.Background())
+		if err != nil {
+			t.Fatalf("expected to successfully get component template, got %v", err)
+		}
+		if resp == nil {
+			t.Fatal("expected response on getting component template")
+		}
+	}
+
+	// Delete the component template
+	{
+		resp, err := client.IndexDeleteComponentTemplate(templateName).Pretty(true).Do(context.Background())
+		if err != nil {
+			t.Fatalf("expected to successfully delete component template, got %v", err)
+		}
+		if resp == nil {
+			t.Fatal("expected response on deleting component template")
+		}
+	}
+}

indices_delete_component_template.go

@@ -0,0 +1,182 @@
+// 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"
+)
+
+// IndicesDeleteComponentTemplateService deletes component templates.
+//
+// See https://www.elastic.co/guide/en/elasticsearch/reference/7.10/indices-delete-component-template.html
+// for more details.
+type IndicesDeleteComponentTemplateService 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
+	timeout       string
+	masterTimeout string
+}
+
+// NewIndicesDeleteComponentTemplateService creates a new IndicesDeleteComponentTemplateService.
+func NewIndicesDeleteComponentTemplateService(client *Client) *IndicesDeleteComponentTemplateService {
+	return &IndicesDeleteComponentTemplateService{
+		client: client,
+	}
+}
+
+// Pretty tells Elasticsearch whether to return a formatted JSON response.
+func (s *IndicesDeleteComponentTemplateService) Pretty(pretty bool) *IndicesDeleteComponentTemplateService {
+	s.pretty = &pretty
+	return s
+}
+
+// Human specifies whether human readable values should be returned in
+// the JSON response, e.g. "7.5mb".
+func (s *IndicesDeleteComponentTemplateService) Human(human bool) *IndicesDeleteComponentTemplateService {
+	s.human = &human
+	return s
+}
+
+// ErrorTrace specifies whether to include the stack trace of returned errors.
+func (s *IndicesDeleteComponentTemplateService) ErrorTrace(errorTrace bool) *IndicesDeleteComponentTemplateService {
+	s.errorTrace = &errorTrace
+	return s
+}
+
+// FilterPath specifies a list of filters used to reduce the response.
+func (s *IndicesDeleteComponentTemplateService) FilterPath(filterPath ...string) *IndicesDeleteComponentTemplateService {
+	s.filterPath = filterPath
+	return s
+}
+
+// Header adds a header to the request.
+func (s *IndicesDeleteComponentTemplateService) Header(name string, value string) *IndicesDeleteComponentTemplateService {
+	if s.headers == nil {
+		s.headers = http.Header{}
+	}
+	s.headers.Add(name, value)
+	return s
+}
+
+// Headers specifies the headers of the request.
+func (s *IndicesDeleteComponentTemplateService) Headers(headers http.Header) *IndicesDeleteComponentTemplateService {
+	s.headers = headers
+	return s
+}
+
+// Name is the name of the template.
+func (s *IndicesDeleteComponentTemplateService) Name(name string) *IndicesDeleteComponentTemplateService {
+	s.name = name
+	return s
+}
+
+// Timeout is an explicit operation timeout.
+func (s *IndicesDeleteComponentTemplateService) Timeout(timeout string) *IndicesDeleteComponentTemplateService {
+	s.timeout = timeout
+	return s
+}
+
+// MasterTimeout specifies the timeout for connection to master.
+func (s *IndicesDeleteComponentTemplateService) MasterTimeout(masterTimeout string) *IndicesDeleteComponentTemplateService {
+	s.masterTimeout = masterTimeout
+	return s
+}
+
+// buildURL builds the URL for the operation.
+func (s *IndicesDeleteComponentTemplateService) buildURL() (string, url.Values, error) {
+	// Build URL
+	path, err := uritemplates.Expand("/_component_template/{name}", map[string]string{
+		"name": s.name,
+	})
+	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.timeout != "" {
+		params.Set("timeout", s.timeout)
+	}
+	if s.masterTimeout != "" {
+		params.Set("master_timeout", s.masterTimeout)
+	}
+	return path, params, nil
+}
+
+// Validate checks if the operation is valid.
+func (s *IndicesDeleteComponentTemplateService) Validate() error {
+	var invalid []string
+	if s.name == "" {
+		invalid = append(invalid, "Name")
+	}
+	if len(invalid) > 0 {
+		return fmt.Errorf("missing required fields: %v", invalid)
+	}
+	return nil
+}
+
+// Do executes the operation.
+func (s *IndicesDeleteComponentTemplateService) Do(ctx context.Context) (*IndicesDeleteComponentTemplateResponse, 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:  "DELETE",
+		Path:    path,
+		Params:  params,
+		Headers: s.headers,
+	})
+	if err != nil {
+		return nil, err
+	}
+
+	// Return operation response
+	ret := new(IndicesDeleteComponentTemplateResponse)
+	if err := s.client.decoder.Decode(res.Body, ret); err != nil {
+		return nil, err
+	}
+	return ret, nil
+}
+
+// IndicesDeleteComponentTemplateResponse is the response of IndicesDeleteComponentTemplateService.Do.
+type IndicesDeleteComponentTemplateResponse struct {
+	Acknowledged       bool   `json:"acknowledged"`
+	ShardsAcknowledged bool   `json:"shards_acknowledged"`
+	Index              string `json:"index,omitempty"`
+}