website/pkg/controller/api/photo.go

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package api
import (
"net/http"
"strconv"
"code.nonshy.com/nonshy/website/pkg/log"
"code.nonshy.com/nonshy/website/pkg/models"
"code.nonshy.com/nonshy/website/pkg/session"
)
// ViewPhoto API pings a view count on a photo, e.g. from the lightbox modal.
func ViewPhoto() http.HandlerFunc {
// Response JSON schema.
type Response struct {
OK bool `json:"OK"`
Error string `json:"error,omitempty"`
Likes int64 `json:"likes"`
}
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
// Get the current user.
currentUser, err := session.CurrentUser(r)
if err != nil {
SendJSON(w, http.StatusBadRequest, Response{
Error: "Couldn't get current user!",
})
return
}
// Photo ID from path parameter.
var photoID uint64
if id, err := strconv.Atoi(r.PathValue("photo_id")); err == nil && id > 0 {
photoID = uint64(id)
} else {
SendJSON(w, http.StatusBadRequest, Response{
Error: "Invalid photo ID",
})
return
}
// Find this photo.
photo, err := models.GetPhoto(photoID)
if err != nil {
SendJSON(w, http.StatusNotFound, Response{
Error: "Photo Not Found",
})
return
}
// Check permission to have seen this photo.
if ok, err := photo.ShouldBeSeenBy(currentUser); !ok {
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log.Error("Photo %d can't be seen by %s: %s", photo.ID, currentUser.Username, err)
SendJSON(w, http.StatusNotFound, Response{
Error: "Photo Not Found",
})
return
}
// Mark a view.
if err := photo.View(currentUser); err != nil {
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log.Error("Update photo(%d) views: %s", photo.ID, err)
}
// Send success response.
SendJSON(w, http.StatusOK, Response{
OK: true,
})
})
}