119 lines
2.9 KiB
Go
119 lines
2.9 KiB
Go
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// Copyright 2012-present Oliver Eilhard. All rights reserved.
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// Use of this source code is governed by a MIT-license.
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// See http://olivere.mit-license.org/license.txt for details.
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package elastic
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import (
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"context"
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"fmt"
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"net/http"
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"net/url"
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"github.com/olivere/elastic/uritemplates"
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)
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// IndicesExistsTemplateService checks if a given template exists.
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// See http://www.elastic.co/guide/en/elasticsearch/reference/5.2/indices-templates.html#indices-templates-exists
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// for documentation.
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type IndicesExistsTemplateService struct {
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client *Client
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pretty bool
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name string
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local *bool
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}
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// NewIndicesExistsTemplateService creates a new IndicesExistsTemplateService.
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func NewIndicesExistsTemplateService(client *Client) *IndicesExistsTemplateService {
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return &IndicesExistsTemplateService{
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client: client,
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}
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}
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// Name is the name of the template.
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func (s *IndicesExistsTemplateService) Name(name string) *IndicesExistsTemplateService {
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s.name = name
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return s
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}
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// Local indicates whether to return local information, i.e. do not retrieve
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// the state from master node (default: false).
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func (s *IndicesExistsTemplateService) Local(local bool) *IndicesExistsTemplateService {
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s.local = &local
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return s
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}
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// Pretty indicates that the JSON response be indented and human readable.
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func (s *IndicesExistsTemplateService) Pretty(pretty bool) *IndicesExistsTemplateService {
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s.pretty = pretty
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return s
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}
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// buildURL builds the URL for the operation.
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func (s *IndicesExistsTemplateService) buildURL() (string, url.Values, error) {
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// Build URL
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path, err := uritemplates.Expand("/_template/{name}", map[string]string{
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"name": s.name,
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})
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if err != nil {
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return "", url.Values{}, err
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}
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// Add query string parameters
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params := url.Values{}
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if s.pretty {
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params.Set("pretty", "true")
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}
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if s.local != nil {
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params.Set("local", fmt.Sprintf("%v", *s.local))
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}
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return path, params, nil
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}
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// Validate checks if the operation is valid.
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func (s *IndicesExistsTemplateService) Validate() error {
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var invalid []string
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if s.name == "" {
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invalid = append(invalid, "Name")
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}
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if len(invalid) > 0 {
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return fmt.Errorf("missing required fields: %v", invalid)
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}
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return nil
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}
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// Do executes the operation.
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func (s *IndicesExistsTemplateService) Do(ctx context.Context) (bool, error) {
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// Check pre-conditions
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if err := s.Validate(); err != nil {
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return false, err
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}
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// Get URL for request
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path, params, err := s.buildURL()
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if err != nil {
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return false, err
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}
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// Get HTTP response
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res, err := s.client.PerformRequest(ctx, PerformRequestOptions{
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Method: "HEAD",
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Path: path,
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Params: params,
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IgnoreErrors: []int{404},
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})
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if err != nil {
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return false, err
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}
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// Return operation response
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switch res.StatusCode {
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case http.StatusOK:
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return true, nil
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case http.StatusNotFound:
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return false, nil
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default:
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return false, fmt.Errorf("elastic: got HTTP code %d when it should have been either 200 or 404", res.StatusCode)
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}
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}
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