website/pkg/models/user_relationship.go

88 lines
2.5 KiB
Go
Raw Normal View History

package models
// UserRelationship fields - how a target User relates to the CurrentUser, especially
// with regards to whether the User's friends-only or private profile picture should show.
// The zero-values should fail safely: in case the UserRelationship isn't populated correctly,
// private profile pics show as private by default.
type UserRelationship struct {
IsFriend bool // if true, a friends-only profile pic can show
IsPrivateGranted bool // if true, a private profile pic can show
}
// SetUserRelationships updates a set of User objects to populate their UserRelationships in
// relationship to the current user who is looking.
func SetUserRelationships(user *User, users []*User) error {
// Collect the current user's Friendships and Private Grants.
var (
friendIDs = FriendIDs(user.ID)
privateGrants = PrivateGrantedUserIDs(user.ID)
)
// Map them for easier lookup.
var (
friendMap = map[uint64]interface{}{}
privateMap = map[uint64]interface{}{}
)
for _, id := range friendIDs {
friendMap[id] = nil
}
for _, id := range privateGrants {
privateMap[id] = nil
}
// Inject the UserRelationships.
for _, u := range users {
if u.ID == user.ID {
// Current user - set both bools to true - you can always see your own profile pic.
u.UserRelationship.IsFriend = true
u.UserRelationship.IsPrivateGranted = true
continue
}
if _, ok := friendMap[u.ID]; ok {
u.UserRelationship.IsFriend = true
}
if _, ok := privateMap[u.ID]; ok {
u.UserRelationship.IsPrivateGranted = true
}
}
return nil
}
// SetUserRelationshipsInComments takes a set of Comments and sets relationship booleans on their Users.
func SetUserRelationshipsInComments(user *User, comments []*Comment) {
// Gather and map the users.
var (
users = []*User{}
userMap = map[uint64]*User{}
)
for _, c := range comments {
users = append(users, &c.User)
userMap[c.User.ID] = &c.User
}
// Inject relationships.
SetUserRelationships(user, users)
}
// SetUserRelationshipsInThreads takes a set of Threads and sets relationship booleans on their Users.
func SetUserRelationshipsInThreads(user *User, threads []*Thread) {
// Gather and map the thread parent comments.
var (
comments = []*Comment{}
comMap = map[uint64]*Comment{}
)
for _, c := range threads {
comments = append(comments, &c.Comment)
comMap[c.Comment.ID] = &c.Comment
}
// Inject relationships into those comments' users.
SetUserRelationshipsInComments(user, comments)
}