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// Copyright 2015 opentsdb-goclient authors. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
//
// Package client defines the client and the corresponding
// rest api implementaion of OpenTSDB.
//
// suggest.go contains the structs and methods for the implementation of /api/suggest.
//
package client
import (
"bytes"
"encoding/json"
"errors"
"fmt"
"strings"
)
// SuggestParam is the structure used to hold
// the querying parameters when calling /api/suggest.
// Each attributes in SuggestParam matches the definition in
// (http://opentsdb.net/docs/build/html/api_http/suggest.html).
//
type SuggestParam struct {
// The type of data to auto complete on.
// Must be one of the following: metrics, tagk or tagv.
// It is required.
// Only the one of the three query type can be used:
// TypeMetrics, TypeTagk, TypeTagv
Type string `json:"type"`
// An optional string value to match on for the given type
Q string `json:"q,omitempty"`
// An optional integer value presenting the maximum number of suggested
// results to return. If it is set, it must be greater than 0.
MaxResultNum int `json:"max,omitempty"`
}
func (sugParam *SuggestParam) String() string {
contents, _ := json.Marshal(sugParam)
return string(contents)
}
type SuggestResponse struct {
StatusCode int
ResultInfo []string `json:"ResultInfo"`
}
func (sugResp *SuggestResponse) SetStatus(code int) {
sugResp.StatusCode = code
}
func (sugResp *SuggestResponse) GetCustomParser() func(respCnt []byte) error {
return func(respCnt []byte) error {
return json.Unmarshal([]byte(fmt.Sprintf("{%s:%s}", `"ResultInfo"`, string(respCnt))), &sugResp)
}
}
func (sugResp *SuggestResponse) String() string {
buffer := bytes.NewBuffer(nil)
content, _ := json.Marshal(sugResp)
buffer.WriteString(fmt.Sprintf("%s\n", string(content)))
return buffer.String()
}
func (c *clientImpl) Suggest(sugParam SuggestParam) (*SuggestResponse, error) {
if !isValidSuggestParam(&sugParam) {
return nil, errors.New("The given suggest param is invalid.\n")
}
sugEndpoint := fmt.Sprintf("%s%s", c.tsdbEndpoint, SuggestPath)
reqBodyCnt, err := getSuggestBodyContents(&sugParam)
if err != nil {
return nil, err
}
fmt.Println(reqBodyCnt)
sugResp := SuggestResponse{}
if err := c.sendRequest(PostMethod, sugEndpoint, reqBodyCnt, &sugResp); err != nil {
return nil, err
}
return &sugResp, nil
}
func isValidSuggestParam(sugParam *SuggestParam) bool {
if sugParam.Type == "" {
return false
}
types := []string{TypeMetrics, TypeTagk, TypeTagv}
sugParam.Type = strings.TrimSpace(sugParam.Type)
for _, typeItem := range types {
if sugParam.Type == typeItem {
return true
}
}
return false
}
func getSuggestBodyContents(sugParam *SuggestParam) (string, error) {
result, err := json.Marshal(sugParam)
if err != nil {
return "", errors.New(fmt.Sprintf("Failed to marshal suggest param: %v\n", err))
}
return string(result), nil
}
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