gotosocial/internal/visibility/statusvisible.go
2021-12-20 18:42:19 +01:00

256 lines
9.5 KiB
Go

/*
GoToSocial
Copyright (C) 2021-2022 GoToSocial Authors admin@gotosocial.org
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package visibility
import (
"context"
"fmt"
"github.com/sirupsen/logrus"
"github.com/superseriousbusiness/gotosocial/internal/db"
"github.com/superseriousbusiness/gotosocial/internal/gtsmodel"
)
func (f *filter) StatusVisible(ctx context.Context, targetStatus *gtsmodel.Status, requestingAccount *gtsmodel.Account) (bool, error) {
const getBoosted = true
l := logrus.WithFields(logrus.Fields{
"func": "StatusVisible",
"statusID": targetStatus.ID,
})
// Fetch any relevant accounts for the target status
relevantAccounts, err := f.relevantAccounts(ctx, targetStatus, getBoosted)
if err != nil {
l.Debugf("error pulling relevant accounts for status %s: %s", targetStatus.ID, err)
return false, fmt.Errorf("StatusVisible: error pulling relevant accounts for status %s: %s", targetStatus.ID, err)
}
// Check we have determined a target account
targetAccount := relevantAccounts.Account
if targetAccount == nil {
l.Trace("target account is not set")
return false, nil
}
// Check for domain blocks among relevant accounts
domainBlocked, err := f.domainBlockedRelevant(ctx, relevantAccounts)
if err != nil {
l.Debugf("error checking domain block: %s", err)
return false, fmt.Errorf("error checking domain block: %s", err)
} else if domainBlocked {
return false, nil
}
// if target account is suspended then don't show the status
if !targetAccount.SuspendedAt.IsZero() {
l.Trace("target account suspended at is not zero")
return false, nil
}
// if the target user doesn't exist (anymore) then the status also shouldn't be visible
// note: we only do this for local users
if targetAccount.Domain == "" {
targetUser := &gtsmodel.User{}
if err := f.db.GetWhere(ctx, []db.Where{{Key: "account_id", Value: targetAccount.ID}}, targetUser); err != nil {
l.Debug("target user could not be selected")
if err == db.ErrNoEntries {
return false, nil
}
return false, fmt.Errorf("StatusVisible: db error selecting user for local target account %s: %s", targetAccount.ID, err)
}
// if target user is disabled, not yet approved, or not confirmed then don't show the status
// (although in the latter two cases it's unlikely they posted a status yet anyway, but you never know!)
if targetUser.Disabled || !targetUser.Approved || targetUser.ConfirmedAt.IsZero() {
l.Trace("target user is disabled, not approved, or not confirmed")
return false, nil
}
}
// If requesting account is nil, that means whoever requested the status didn't auth, or their auth failed.
// In this case, we can still serve the status if it's public, otherwise we definitely shouldn't.
if requestingAccount == nil {
if targetStatus.Visibility == gtsmodel.VisibilityPublic {
return true, nil
}
l.Trace("requesting account is nil but the target status isn't public")
return false, nil
}
// if the requesting user doesn't exist (anymore) then the status also shouldn't be visible
// note: we only do this for local users
if requestingAccount.Domain == "" {
requestingUser := &gtsmodel.User{}
if err := f.db.GetWhere(ctx, []db.Where{{Key: "account_id", Value: requestingAccount.ID}}, requestingUser); err != nil {
// if the requesting account is local but doesn't have a corresponding user in the db this is a problem
l.Debug("requesting user could not be selected")
if err == db.ErrNoEntries {
return false, nil
}
return false, fmt.Errorf("StatusVisible: db error selecting user for local requesting account %s: %s", requestingAccount.ID, err)
}
// okay, user exists, so make sure it has full privileges/is confirmed/approved
if requestingUser.Disabled || !requestingUser.Approved || requestingUser.ConfirmedAt.IsZero() {
l.Trace("requesting account is local but corresponding user is either disabled, not approved, or not confirmed")
return false, nil
}
}
// if requesting account is suspended then don't show the status -- although they probably shouldn't have gotten
// this far (ie., been authed) in the first place: this is just for safety.
if !requestingAccount.SuspendedAt.IsZero() {
l.Trace("requesting account is suspended")
return false, nil
}
// if the target status belongs to the requesting account, they should always be able to view it at this point
if targetStatus.AccountID == requestingAccount.ID {
return true, nil
}
// At this point we have a populated targetAccount, targetStatus, and requestingAccount, so we can check for blocks and whathaveyou
// First check if a block exists directly between the target account (which authored the status) and the requesting account.
if blocked, err := f.db.IsBlocked(ctx, targetAccount.ID, requestingAccount.ID, true); err != nil {
l.Debugf("something went wrong figuring out if the accounts have a block: %s", err)
return false, err
} else if blocked {
// don't allow the status to be viewed if a block exists in *either* direction between these two accounts, no creepy stalking please
l.Trace("a block exists between requesting account and target account")
return false, nil
}
// If not in reply to the requesting account, check if inReplyToAccount is blocked
if relevantAccounts.InReplyToAccount != nil && relevantAccounts.InReplyToAccount.ID != requestingAccount.ID {
if blocked, err := f.db.IsBlocked(ctx, relevantAccounts.InReplyToAccount.ID, requestingAccount.ID, true); err != nil {
return false, err
} else if blocked {
l.Trace("a block exists between requesting account and reply to account")
return false, nil
}
}
// status boosts accounts id
if relevantAccounts.BoostedAccount != nil {
if blocked, err := f.db.IsBlocked(ctx, relevantAccounts.BoostedAccount.ID, requestingAccount.ID, true); err != nil {
return false, err
} else if blocked {
l.Trace("a block exists between requesting account and boosted account")
return false, nil
}
}
// status boosts a reply to account id
if relevantAccounts.BoostedInReplyToAccount != nil {
if blocked, err := f.db.IsBlocked(ctx, relevantAccounts.BoostedInReplyToAccount.ID, requestingAccount.ID, true); err != nil {
return false, err
} else if blocked {
l.Trace("a block exists between requesting account and boosted reply to account")
return false, nil
}
}
// boost mentions accounts
for _, a := range relevantAccounts.BoostedMentionedAccounts {
if a == nil {
continue
}
if blocked, err := f.db.IsBlocked(ctx, a.ID, requestingAccount.ID, true); err != nil {
return false, err
} else if blocked {
l.Trace("a block exists between requesting account and a boosted mentioned account")
return false, nil
}
}
// Iterate mentions to check for blocks or requester mentions
isMentioned, blockAmongMentions := false, false
for _, a := range relevantAccounts.MentionedAccounts {
if a == nil {
continue
}
if blocked, err := f.db.IsBlocked(ctx, a.ID, requestingAccount.ID, true); err != nil {
return false, err
} else if blocked {
blockAmongMentions = true
break
}
if a.ID == requestingAccount.ID {
isMentioned = true
}
}
if blockAmongMentions {
l.Trace("a block exists between requesting account and a mentioned account")
return false, nil
} else if isMentioned {
// Requester mentioned, should always be visible
return true, nil
}
// at this point we know neither account blocks the other, or another account mentioned or otherwise referred to in the status
// that means it's now just a matter of checking the visibility settings of the status itself
switch targetStatus.Visibility {
case gtsmodel.VisibilityPublic, gtsmodel.VisibilityUnlocked:
// no problem here
case gtsmodel.VisibilityFollowersOnly:
// Followers-only post, check for a one-way follow to target
follows, err := f.db.IsFollowing(ctx, requestingAccount, targetAccount)
if err != nil {
return false, err
}
if !follows {
l.Trace("requested status is followers only but requesting account is not a follower")
return false, nil
}
case gtsmodel.VisibilityMutualsOnly:
// Mutuals-only post, check for a mutual follow
mutuals, err := f.db.IsMutualFollowing(ctx, requestingAccount, targetAccount)
if err != nil {
return false, err
}
if !mutuals {
l.Trace("requested status is mutuals only but accounts aren't mufos")
return false, nil
}
case gtsmodel.VisibilityDirect:
l.Trace("requesting account requests a direct status it's not mentioned in")
return false, nil // it's not mentioned -_-
}
// If we reached here, all is okay
return true, nil
}
func (f *filter) StatusesVisible(ctx context.Context, statuses []*gtsmodel.Status, requestingAccount *gtsmodel.Account) ([]*gtsmodel.Status, error) {
filtered := []*gtsmodel.Status{}
for _, s := range statuses {
visible, err := f.StatusVisible(ctx, s, requestingAccount)
if err != nil {
return nil, err
}
if visible {
filtered = append(filtered, s)
}
}
return filtered, nil
}