website/pkg/controller/photo/view.go

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package photo
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"
"code.nonshy.com/nonshy/website/pkg/templates"
)
// View photo controller to see the comment thread.
func View() http.HandlerFunc {
tmpl := templates.Must("photo/permalink.html")
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
// Required query param: the photo ID.
var photo *models.Photo
if idStr := r.FormValue("id"); idStr == "" {
session.FlashError(w, r, "Missing photo ID parameter.")
templates.Redirect(w, "/")
return
} else {
if idInt, err := strconv.Atoi(idStr); err != nil {
session.FlashError(w, r, "Invalid ID parameter.")
templates.Redirect(w, "/")
return
} else {
if found, err := models.GetPhoto(uint64(idInt)); err != nil {
templates.NotFoundPage(w, r)
return
} else {
photo = found
}
}
}
// Load the current user in case they are viewing their own page.
currentUser, err := session.CurrentUser(r)
if err != nil {
session.FlashError(w, r, "Unexpected error: couldn't get CurrentUser")
}
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// Find the photo's owner.
user, err := models.GetUser(photo.UserID)
if err != nil {
templates.NotFoundPage(w, r)
return
}
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if ok, err := photo.CanBeSeenBy(currentUser); !ok {
log.Error("Photo %d can't be seen by %s: %s", photo.ID, currentUser.Username, err)
session.FlashError(w, r, "Photo Not Found")
templates.Redirect(w, "/")
return
}
// Get Likes information about these photos.
likeMap := models.MapLikes(currentUser, "photos", []uint64{photo.ID})
commentMap := models.MapCommentCounts("photos", []uint64{photo.ID})
// Get all the comments.
comments, err := models.ListComments(currentUser, "photos", photo.ID)
if err != nil {
log.Error("Couldn't list comments for photo %d: %s", photo.ID, err)
}
// Get the like map for these comments.
commentIDs := []uint64{}
for _, com := range comments {
commentIDs = append(commentIDs, com.ID)
}
commentLikeMap := models.MapLikes(currentUser, "comments", commentIDs)
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// Get the summary of WHO liked this picture.
likeExample, likeRemainder, err := models.WhoLikes(currentUser, "photos", photo.ID)
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if err != nil {
log.Error("WhoLikes(photo %d): %s", photo.ID, err)
}
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// Populate the user relationships in these comments.
models.SetUserRelationshipsInComments(currentUser, comments)
// Is the current user subscribed to notifications on this thread?
_, isSubscribed := models.IsSubscribed(currentUser, "photos", photo.ID)
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// Mark this photo as "Viewed" by the user.
if err := photo.View(currentUser); err != nil {
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log.Error("Update photo(%d) views: %s", photo.ID, err)
}
var vars = map[string]interface{}{
"IsOwnPhoto": currentUser.ID == user.ID,
"User": user,
"Photo": photo,
"LikeMap": likeMap,
"CommentMap": commentMap,
"Comments": comments,
"CommentLikeMap": commentLikeMap,
"IsSubscribed": isSubscribed,
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// Details on who likes the photo.
"LikeExample": likeExample,
"LikeRemainder": likeRemainder,
"LikeTableName": "photos",
"LikeTableID": photo.ID,
}
if err := tmpl.Execute(w, r, vars); err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
return
}
})
}