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feed.go
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feed.go
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package handler
import (
"encoding/json"
"fmt"
"io/ioutil"
"log"
"net/http"
"strconv"
"github.com/Alkemic/go-route"
"github.com/Alkemic/go-route/middleware"
"gopkg.in/go-playground/validator.v9"
"github.com/Alkemic/webrss/repository"
"github.com/Alkemic/webrss/webrss"
)
type FeedValid struct {
FeedURL string `validate:"required,min=3,max=255,url" json:"feed_url"`
FeedFaviconURL string `validate:"max=255" json:"site_favicon_url"`
FeedTitle string `validate:"max=255" json:"feed_title"`
Category int64 `validate:"required"`
}
type feedHandler struct {
logger *log.Logger
webrssService webrssService
}
func NewFeed(logger *log.Logger, service webrssService) *feedHandler {
return &feedHandler{
webrssService: service,
logger: logger,
}
}
func (h *feedHandler) Create(rw http.ResponseWriter, req *http.Request) {
body, err := ioutil.ReadAll(req.Body)
if err != nil {
h.logger.Println("error reading body:", err)
http.Error(rw, http.StatusText(http.StatusInternalServerError), http.StatusInternalServerError)
return
}
feedData := FeedValid{}
if err := json.Unmarshal(body, &feedData); err != nil {
h.logger.Println("can't unmarshal body:", err)
http.Error(rw, http.StatusText(http.StatusBadRequest), http.StatusBadRequest)
return
}
if err = validator.New().Struct(feedData); err != nil {
h.logger.Println("validation error:", err)
http.Error(rw, "validation error", http.StatusBadRequest)
return
}
if err := h.webrssService.CreateFeed(req.Context(), feedData.FeedURL, feedData.Category); err != nil {
h.logger.Println("error creating feed:", err)
http.Error(rw, http.StatusText(http.StatusInternalServerError), http.StatusInternalServerError)
return
}
fmt.Fprint(rw, `{"status":"ok"}`)
}
func (h *feedHandler) Update(rw http.ResponseWriter, req *http.Request) {
id, err := requestIntParam(req, "id")
if err != nil {
h.logger.Println("cannot get param 'id': ", err)
http.Error(rw, http.StatusText(http.StatusBadRequest), http.StatusBadRequest)
return
}
body, err := ioutil.ReadAll(req.Body)
if err != nil {
h.logger.Println("error reading body: ", err)
http.Error(rw, "can't read body", http.StatusBadRequest)
return
}
feedData := FeedValid{}
if err := json.Unmarshal(body, &feedData); err != nil {
h.logger.Println("can't unmarshal body:", err)
http.Error(rw, http.StatusText(http.StatusBadRequest), http.StatusBadRequest)
return
}
if err = validator.New().Struct(feedData); err != nil {
h.logger.Println("validation error:", err)
http.Error(rw, "validation error", http.StatusBadRequest)
return
}
ctx := req.Context()
feed, err := h.webrssService.GetFeed(ctx, id)
if err != nil {
h.logger.Println("error getting feed: ", err)
http.Error(rw, "error getting feed", http.StatusInternalServerError)
return
}
feed.FeedUrl = feedData.FeedURL
feed.FeedTitle = feedData.FeedTitle
feed.CategoryID = feedData.Category
feed.SiteFaviconUrl = repository.NewNullString(feedData.FeedFaviconURL)
if err := h.webrssService.UpdateFeed(ctx, feed); err != nil {
h.logger.Println("error updating category: ", err)
http.Error(rw, "error updating category", http.StatusInternalServerError)
return
}
fmt.Fprint(rw, `{"status":"ok"}`)
}
func (h *feedHandler) Delete(rw http.ResponseWriter, req *http.Request) {
idRaw, ok := route.GetParam(req, "id")
if !ok {
http.Error(rw, http.StatusText(http.StatusBadRequest), http.StatusBadRequest)
return
}
id, err := strconv.Atoi(idRaw)
if err != nil {
h.logger.Println("cannot convert param 'id' to int: ", err)
http.Error(rw, http.StatusText(http.StatusBadRequest), http.StatusBadRequest)
return
}
ctx := req.Context()
feed, err := h.webrssService.GetFeed(ctx, int64(id))
if err != nil {
h.logger.Println("cannot get feed: ", err)
http.Error(rw, http.StatusText(http.StatusInternalServerError), http.StatusInternalServerError)
return
}
if err := h.webrssService.DeleteFeed(ctx, feed); err != nil {
h.logger.Println("cannot delete feed: ", err)
http.Error(rw, http.StatusText(http.StatusInternalServerError), http.StatusInternalServerError)
return
}
fmt.Fprint(rw, `{"status":"ok"}`)
}
func (r *feedHandler) GetRoutes() *route.RegexpRouter {
resource := webrss.RESTEndPoint{
Delete: r.Delete,
Put: r.Update,
}
collection := webrss.RESTEndPoint{
Post: r.Create,
}
setHeaders := middleware.SetHeaders(map[string]string{
"Content-Type": "application/json; charset=utf-8",
})
routing := route.New()
routing.Add(`^/?$`, setHeaders(collection.Dispatch))
routing.Add(`^/(?P<id>\d+)/?$`, setHeaders(resource.Dispatch))
return routing
}