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message.go
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/
message.go
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package handler
import (
"bytes"
"context"
"encoding/gob"
"encoding/json"
"errors"
"net/http"
"time"
"github.com/greatfocus/gf-notify/models"
"github.com/greatfocus/gf-notify/repositories"
"github.com/greatfocus/gf-sframe/server"
)
// Message struct
type Message struct {
ChannelHandler func(http.ResponseWriter, *http.Request)
messageRepository *repositories.MessageRepository
meta *server.Meta
}
// ServeHTTP checks if is valid method
func (hdl Message) ServeHTTP(w http.ResponseWriter, r *http.Request) {
switch r.Method {
case http.MethodPost:
hdl.create(w, r)
return
default:
// catch all
// if no method is satisfied return an error
w.WriteHeader(http.StatusMethodNotAllowed)
w.Header().Add("Allow", "GET")
}
}
// ValidateRequest checks if request is valid
func (hdl Message) ValidateRequest(w http.ResponseWriter, r *http.Request) (interface{}, error) {
data, err := hdl.meta.Request(w, r)
if err != nil {
return nil, err
}
return data, nil
}
// Init method
func (hdl *Message) Init(meta *server.Meta) {
hdl.messageRepository = &repositories.MessageRepository{}
hdl.messageRepository.Init(meta.DB, meta.Cache)
hdl.meta = meta
}
// add method adds new message
func (hdl *Message) create(w http.ResponseWriter, r *http.Request) {
ctx, cancel := context.WithTimeout(r.Context(), time.Duration(hdl.meta.Timeout)*time.Second)
defer cancel()
data, err := hdl.ValidateRequest(w, r)
if err != nil {
derr := errors.New("invalid payload request")
hdl.meta.Error(w, r, derr)
return
}
var buf bytes.Buffer
enc := gob.NewEncoder(&buf)
err = enc.Encode(data)
if err != nil {
derr := errors.New("invalid payload request")
hdl.meta.Error(w, r, derr)
return
}
message := models.Message{}
err = json.Unmarshal(buf.Bytes(), &message)
if err != nil {
derr := errors.New("invalid payload request")
hdl.meta.Error(w, r, derr)
return
}
message.PrepareInput(r)
err = message.Validate("new")
if err != nil {
hdl.meta.Error(w, r, err)
return
}
createdMessage, err := hdl.messageRepository.Create(ctx, hdl.meta.JWT.Secret, "staging", message)
if err != nil {
hdl.meta.Error(w, r, err)
return
}
result := message.PrepareOutput(createdMessage)
w.WriteHeader(http.StatusOK)
hdl.meta.Success(w, r, result)
}