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annotation.go
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annotation.go
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// Copyright 2016 Circonus, Inc. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// Annotation API support - Fetch, Create, Update, Delete, and Search
// See: https://login.circonus.com/resources/api/calls/annotation
package api
import (
"encoding/json"
"fmt"
"net/url"
"regexp"
"github.com/circonus-labs/circonus-gometrics/api/config"
)
// Annotation defines a annotation. See https://login.circonus.com/resources/api/calls/annotation for more information.
type Annotation struct {
Category string `json:"category"` // string
CID string `json:"_cid,omitempty"` // string
Created uint `json:"_created,omitempty"` // uint
Description string `json:"description"` // string
LastModified uint `json:"_last_modified,omitempty"` // uint
LastModifiedBy string `json:"_last_modified_by,omitempty"` // string
RelatedMetrics []string `json:"rel_metrics"` // [] len >= 0
Start uint `json:"start"` // uint
Stop uint `json:"stop"` // uint
Title string `json:"title"` // string
}
// NewAnnotation returns a new Annotation (with defaults, if applicable)
func NewAnnotation() *Annotation {
return &Annotation{}
}
// FetchAnnotation retrieves annotation with passed cid.
func (a *API) FetchAnnotation(cid CIDType) (*Annotation, error) {
if cid == nil || *cid == "" {
return nil, fmt.Errorf("Invalid annotation CID [none]")
}
annotationCID := string(*cid)
matched, err := regexp.MatchString(config.AnnotationCIDRegex, annotationCID)
if err != nil {
return nil, err
}
if !matched {
return nil, fmt.Errorf("Invalid annotation CID [%s]", annotationCID)
}
result, err := a.Get(annotationCID)
if err != nil {
return nil, err
}
if a.Debug {
a.Log.Printf("[DEBUG] fetch annotation, received JSON: %s", string(result))
}
annotation := &Annotation{}
if err := json.Unmarshal(result, annotation); err != nil {
return nil, err
}
return annotation, nil
}
// FetchAnnotations retrieves all annotations available to the API Token.
func (a *API) FetchAnnotations() (*[]Annotation, error) {
result, err := a.Get(config.AnnotationPrefix)
if err != nil {
return nil, err
}
var annotations []Annotation
if err := json.Unmarshal(result, &annotations); err != nil {
return nil, err
}
return &annotations, nil
}
// UpdateAnnotation updates passed annotation.
func (a *API) UpdateAnnotation(cfg *Annotation) (*Annotation, error) {
if cfg == nil {
return nil, fmt.Errorf("Invalid annotation config [nil]")
}
annotationCID := string(cfg.CID)
matched, err := regexp.MatchString(config.AnnotationCIDRegex, annotationCID)
if err != nil {
return nil, err
}
if !matched {
return nil, fmt.Errorf("Invalid annotation CID [%s]", annotationCID)
}
jsonCfg, err := json.Marshal(cfg)
if err != nil {
return nil, err
}
if a.Debug {
a.Log.Printf("[DEBUG] update annotation, sending JSON: %s", string(jsonCfg))
}
result, err := a.Put(annotationCID, jsonCfg)
if err != nil {
return nil, err
}
annotation := &Annotation{}
if err := json.Unmarshal(result, annotation); err != nil {
return nil, err
}
return annotation, nil
}
// CreateAnnotation creates a new annotation.
func (a *API) CreateAnnotation(cfg *Annotation) (*Annotation, error) {
if cfg == nil {
return nil, fmt.Errorf("Invalid annotation config [nil]")
}
jsonCfg, err := json.Marshal(cfg)
if err != nil {
return nil, err
}
if a.Debug {
a.Log.Printf("[DEBUG] create annotation, sending JSON: %s", string(jsonCfg))
}
result, err := a.Post(config.AnnotationPrefix, jsonCfg)
if err != nil {
return nil, err
}
annotation := &Annotation{}
if err := json.Unmarshal(result, annotation); err != nil {
return nil, err
}
return annotation, nil
}
// DeleteAnnotation deletes passed annotation.
func (a *API) DeleteAnnotation(cfg *Annotation) (bool, error) {
if cfg == nil {
return false, fmt.Errorf("Invalid annotation config [nil]")
}
return a.DeleteAnnotationByCID(CIDType(&cfg.CID))
}
// DeleteAnnotationByCID deletes annotation with passed cid.
func (a *API) DeleteAnnotationByCID(cid CIDType) (bool, error) {
if cid == nil || *cid == "" {
return false, fmt.Errorf("Invalid annotation CID [none]")
}
annotationCID := string(*cid)
matched, err := regexp.MatchString(config.AnnotationCIDRegex, annotationCID)
if err != nil {
return false, err
}
if !matched {
return false, fmt.Errorf("Invalid annotation CID [%s]", annotationCID)
}
_, err = a.Delete(annotationCID)
if err != nil {
return false, err
}
return true, nil
}
// SearchAnnotations returns annotations matching the specified
// search query and/or filter. If nil is passed for both parameters
// all annotations will be returned.
func (a *API) SearchAnnotations(searchCriteria *SearchQueryType, filterCriteria *SearchFilterType) (*[]Annotation, error) {
q := url.Values{}
if searchCriteria != nil && *searchCriteria != "" {
q.Set("search", string(*searchCriteria))
}
if filterCriteria != nil && len(*filterCriteria) > 0 {
for filter, criteria := range *filterCriteria {
for _, val := range criteria {
q.Add(filter, val)
}
}
}
if q.Encode() == "" {
return a.FetchAnnotations()
}
reqURL := url.URL{
Path: config.AnnotationPrefix,
RawQuery: q.Encode(),
}
result, err := a.Get(reqURL.String())
if err != nil {
return nil, fmt.Errorf("[ERROR] API call error %+v", err)
}
var annotations []Annotation
if err := json.Unmarshal(result, &annotations); err != nil {
return nil, err
}
return &annotations, nil
}