//
// look up a record in cloudant with the provided name
//
func find_record(name string) (*http.Response, error) {
selector := `{
"selector": {
"_id": {
"$gt": 0
},
"name": "` + name + `"
}
}`
return cadb.Post("records", selector, "_find")
}
//
// POST /record
// update an existing record with a new value
// @param name
// @param value
//
func PostRecord(w http.ResponseWriter, r *http.Request) {
// get name and value from request
decoder := json.NewDecoder(r.Body)
var f map[string]interface{}
decoder.Decode(&f)
name := f["name"].(string)
value := f["value"].(string)
name = strings.Trim(name, " ")
value = strings.Trim(value, " ")
// request docs with the same name from cloudant
res, err := find_record(name)
if err != nil {
w.WriteHeader(500)
//fmt.Printf("error reading from cloudant, routes.GetRecord: %s\n", err)
return
}
// parse response from json
buf := new(bytes.Buffer)
buf.ReadFrom(res.Body)
js := buf.String()
var response Response
err = json.Unmarshal([]byte(js), &response)
if err != nil {
w.WriteHeader(500)
estr := fmt.Sprintf("error converting documents to json, routes.PostRecord: %s\n", err)
fmt.Fprint(w, estr)
//fmt.Println(estr)
return
}
// check if docs matching name are found
if len(response.Docs) > 0 {
// doc found, now update it
doc := response.Docs[0]
doc.Value = value
rec, _ := json.Marshal(doc)
fmt.Println(string(rec))
res, err := cadb.Post("records", string(rec), "")
if err != nil {
w.WriteHeader(500)
fmt.Fprint(w, `{"error":"unable to update Record on cloudant"}`)
//fmt.Printf("error reading from cloudant, routes.GetRecord: %s\n", err)
return
}
fmt.Fprint(w, res)
} else {
w.WriteHeader(404)
//fmt.Println("no records found that match name=" + name)
fmt.Fprint(w, `{"error":"no Record found with name: `+name+`"}`)
}
}
//
// PUT /record
// add a new record to the database under a new unique name
// @param name
// @parma value
//
func PutRecord(w http.ResponseWriter, r *http.Request) {
// get name and value from request
decoder := json.NewDecoder(r.Body)
var f map[string]interface{}
decoder.Decode(&f)
name := f["name"].(string)
value := f["value"].(string)
name = strings.Trim(name, " ")
value = strings.Trim(value, " ")
// request docs with the same name from cloudant
res, err := find_record(name)
if err != nil {
w.WriteHeader(500)
//fmt.Printf("error reading from cloudant, routes.GetRecord: %s\n", err)
return
}
// parse response from json
buf := new(bytes.Buffer)
buf.ReadFrom(res.Body)
js := buf.String()
var response Response
err = json.Unmarshal([]byte(js), &response)
if err != nil {
w.WriteHeader(500)
estr := fmt.Sprintf("error converting documents to json, routes.GetRecord: %s\n", err)
fmt.Fprint(w, estr)
//fmt.Println(estr)
return
}
// check if docs matching name are found
if len(response.Docs) == 0 {
record := `{"name":"` + name + `","value":"` + value + `"}`
// create new record in cloudant
res, err := cadb.Post("records", record, "")
if err != nil {
w.WriteHeader(500)
//fmt.Println("error creating record which seemed to be unique")
fmt.Fprint(w, `{"error":"error creating record which seemed to be unique"}`)
}
//fmt.Println(res)
fmt.Fprint(w, res)
} else {
w.WriteHeader(400)
//fmt.Println("a record already exists with name=" + name)
fmt.Fprint(w, `{"error":"a Record already exists with name: '`+name+`'"}`)
}
}
