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package likes
import (
"fmt"
"io/ioutil"
"log"
"net/http"
"net/url"
"strconv"
"fagott.pw/charakterin"
"fagott.pw/grilist/cache"
"fagott.pw/grilist/grilist"
"fagott.pw/grilist/modules/lists"
"github.com/julienschmidt/httprouter"
)
type Module struct {
g *grilist.Grilist
c *cache.Cache
lists *lists.Module
}
func New() *Module {
return &Module{}
}
func (m *Module) Name() string {
return "Likes"
}
func (m *Module) Init(g *grilist.Grilist) {
m.g = g
gm, ok := g.Modules["Lists"]
if !ok {
log.Fatal("tags: lists module not found")
}
m.lists = gm.(*lists.Module)
m.c = cache.New()
m.g.Router.GET("/api/likes/count", m.getLikeCount)
m.g.Router.GET("/api/likes/liked_by", m.isLikedBy)
m.g.Router.PUT("/api/likes", m.addLike)
m.g.Router.DELETE("/api/likes", m.removeLike)
}
func (m *Module) Interface() interface{} {
return m
}
func (m *Module) ProvideDashboardData(user *charakterin.User) []grilist.DashboardCategory {
return make([]grilist.DashboardCategory, 0)
}
func (m *Module) getLikeCount(w http.ResponseWriter, r *http.Request, p httprouter.Params) {
params := r.URL.Query()
contentId, err := strconv.Atoi(params.Get("id"))
if err != nil {
http.Error(w, "invalid content id", http.StatusBadRequest)
return
}
contentType, err := strconv.Atoi(params.Get("type"))
if err != nil {
http.Error(w, "invalid content id", http.StatusBadRequest)
return
}
var res int
if err := m.g.DB.QueryRow(`SELECT COUNT(*) FROM grilist.likes WHERE content = $1 AND type = $2`, contentId, contentType).Scan(&res); err != nil {
http.Error(w, "pq error", http.StatusInternalServerError)
log.Printf("error getting like count: %s", err)
return
}
w.WriteHeader(200)
w.Write([]byte(fmt.Sprintf("%d", res)))
}
func (m *Module) isLikedBy(w http.ResponseWriter, r *http.Request, p httprouter.Params) {
params := r.URL.Query()
contentId, err := strconv.Atoi(params.Get("id"))
if err != nil {
http.Error(w, "invalid content id", http.StatusBadRequest)
return
}
contentType, err := strconv.Atoi(params.Get("type"))
if err != nil {
http.Error(w, "invalid content type", http.StatusBadRequest)
return
}
userId, err := strconv.Atoi(params.Get("user"))
if err != nil {
http.Error(w, "invalid user id", http.StatusBadRequest)
return
}
var res int
if err := m.g.DB.QueryRow(`SELECT COUNT(*) FROM grilist.likes WHERE content = $1 AND type = $2 AND "user" = $3`, contentId, contentType, userId).Scan(&res); err != nil {
http.Error(w, "pq error", http.StatusInternalServerError)
log.Printf("error getting like by user: %s", err)
return
}
w.WriteHeader(200)
w.Write([]byte(fmt.Sprintf("%t", res > 0)))
}
func (m *Module) addLike(w http.ResponseWriter, r *http.Request, p httprouter.Params) {
params, err := readBody(r)
if err != nil {
log.Println(err)
http.Error(w, "invalid body", http.StatusBadRequest)
return
}
contentId, err := strconv.Atoi(params.Get("id"))
if err != nil {
log.Println(err)
http.Error(w, "invalid content id", http.StatusBadRequest)
return
}
contentType, err := strconv.Atoi(params.Get("type"))
if err != nil {
log.Println(err)
http.Error(w, "invalid content type", http.StatusBadRequest)
return
}
userId, err := strconv.Atoi(params.Get("user"))
if err != nil {
http.Error(w, "invalid user id", http.StatusBadRequest)
return
}
_, err = m.g.DB.Exec(`INSERT INTO grilist.likes(content, "user", type) SELECT $1, $2, $3 WHERE NOT EXISTS (SELECT * FROM grilist.likes WHERE content = $1 AND "user" = $2 AND type = $3)`, contentId, userId, contentType)
if err != nil {
http.Error(w, "pq error", http.StatusInternalServerError)
log.Printf("error add like: %s", err)
return
}
w.WriteHeader(200)
}
func (m *Module) removeLike(w http.ResponseWriter, r *http.Request, p httprouter.Params) {
params, err := readBody(r)
if err != nil {
http.Error(w, "invalid body", http.StatusBadRequest)
return
}
contentId, err := strconv.Atoi(params.Get("id"))
if err != nil {
http.Error(w, "invalid content id", http.StatusBadRequest)
return
}
contentType, err := strconv.Atoi(params.Get("type"))
if err != nil {
http.Error(w, "invalid content type", http.StatusBadRequest)
return
}
userId, err := strconv.Atoi(params.Get("user"))
if err != nil {
http.Error(w, "invalid user id", http.StatusBadRequest)
return
}
_, err = m.g.DB.Exec(`DELETE FROM grilist.likes WHERE content = $1 AND "user" = $2 AND type = $3`, contentId, userId, contentType)
if err != nil {
http.Error(w, "pq error", http.StatusInternalServerError)
log.Printf("error add like: %s", err)
return
}
w.WriteHeader(200)
}
func readBody(r *http.Request) (url.Values, error) {
defer r.Body.Close()
data, err := ioutil.ReadAll(r.Body)
if err != nil {
return nil, err
}
values, err := url.ParseQuery(string(data))
if err != nil {
return nil, err
}
return values, nil
}
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