Database updates (#144)

* start moving some database stuff around

* continue moving db stuff around

* more fiddling

* more updates

* and some more

* and yet more

* i broke SOMETHING but what, it's a mystery

* tidy up

* vendor ttlcache

* use ttlcache

* fix up some tests

* rename some stuff

* little reminder

* some more updates

6 files changed, 349 insertions, 217 deletions

diff --git a/internal/visibility/filter.go b/internal/visibility/filter.go
index 181eb8ee7..2c43fa4ee 100644
--- a/internal/visibility/filter.go
+++ b/internal/visibility/filter.go
@@ -1,3 +1,21 @@
+/*
+   GoToSocial
+   Copyright (C) 2021 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 (
diff --git a/internal/visibility/relevantaccounts.go b/internal/visibility/relevantaccounts.go
new file mode 100644
index 000000000..5957d3111
--- /dev/null
+++ b/internal/visibility/relevantaccounts.go
@@ -0,0 +1,229 @@
+/*
+   GoToSocial
+   Copyright (C) 2021 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 (
+	"errors"
+	"fmt"
+
+	"github.com/superseriousbusiness/gotosocial/internal/gtsmodel"
+)
+
+// relevantAccounts denotes accounts that are replied to, boosted by, or mentioned in a status.
+type relevantAccounts struct {
+	// Who wrote the status
+	Account *gtsmodel.Account
+	// Who is the status replying to
+	InReplyToAccount *gtsmodel.Account
+	// Which accounts are mentioned (tagged) in the status
+	MentionedAccounts []*gtsmodel.Account
+	// Who authed the boosted status
+	BoostedAccount *gtsmodel.Account
+	// If the boosted status replies to another account, who does it reply to?
+	BoostedInReplyToAccount *gtsmodel.Account
+	// Who is mentioned (tagged) in the boosted status
+	BoostedMentionedAccounts []*gtsmodel.Account
+}
+
+func (f *filter) relevantAccounts(status *gtsmodel.Status, getBoosted bool) (*relevantAccounts, error) {
+	relAccts := &relevantAccounts{
+		MentionedAccounts:        []*gtsmodel.Account{},
+		BoostedMentionedAccounts: []*gtsmodel.Account{},
+	}
+
+	/*
+		Here's what we need to try and extract from the status:
+
+			// 1. Who wrote the status
+		    Account *gtsmodel.Account
+
+		    // 2. Who is the status replying to
+		    InReplyToAccount *gtsmodel.Account
+
+		    // 3. Which accounts are mentioned (tagged) in the status
+		    MentionedAccounts []*gtsmodel.Account
+
+			if getBoosted:
+				// 4. Who wrote the boosted status
+				BoostedAccount *gtsmodel.Account
+
+				// 5. If the boosted status replies to another account, who does it reply to?
+				BoostedInReplyToAccount *gtsmodel.Account
+
+				// 6. Who is mentioned (tagged) in the boosted status
+				BoostedMentionedAccounts []*gtsmodel.Account
+	*/
+
+	// 1. Account.
+	// Account might be set on the status already
+	if status.Account != nil {
+		// it was set
+		relAccts.Account = status.Account
+	} else {
+		// it wasn't set, so get it from the db
+		account, err := f.db.GetAccountByID(status.AccountID)
+		if err != nil {
+			return nil, fmt.Errorf("relevantAccounts: error getting account with id %s: %s", status.AccountID, err)
+		}
+		// set it on the status in case we need it further along
+		status.Account = account
+		// set it on relevant accounts
+		relAccts.Account = account
+	}
+
+	// 2. InReplyToAccount
+	// only get this if InReplyToAccountID is set
+	if status.InReplyToAccountID != "" {
+		// InReplyToAccount might be set on the status already
+		if status.InReplyToAccount != nil {
+			// it was set
+			relAccts.InReplyToAccount = status.InReplyToAccount
+		} else {
+			// it wasn't set, so get it from the db
+			inReplyToAccount, err := f.db.GetAccountByID(status.InReplyToAccountID)
+			if err != nil {
+				return nil, fmt.Errorf("relevantAccounts: error getting inReplyToAccount with id %s: %s", status.InReplyToAccountID, err)
+			}
+			// set it on the status in case we need it further along
+			status.InReplyToAccount = inReplyToAccount
+			// set it on relevant accounts
+			relAccts.InReplyToAccount = inReplyToAccount
+		}
+	}
+
+	// 3. MentionedAccounts
+	// First check if status.Mentions is populated with all mentions that correspond to status.MentionIDs
+	for _, mID := range status.MentionIDs {
+		if mID == "" {
+			continue
+		}
+		if !idIn(mID, status.Mentions) {
+			// mention with ID isn't in status.Mentions
+			mention, err := f.db.GetMention(mID)
+			if err != nil {
+				return nil, fmt.Errorf("relevantAccounts: error getting mention with id %s: %s", mID, err)
+			}
+			if mention == nil {
+				return nil, fmt.Errorf("relevantAccounts: mention with id %s was nil", mID)
+			}
+			status.Mentions = append(status.Mentions, mention)
+		}
+	}
+	// now filter mentions to make sure we only have mentions with a corresponding ID
+	nm := []*gtsmodel.Mention{}
+	for _, m := range status.Mentions {
+		if m == nil {
+			continue
+		}
+		if mentionIn(m, status.MentionIDs) {
+			nm = append(nm, m)
+		}
+	}
+	status.Mentions = nm
+
+	if len(status.Mentions) != len(status.MentionIDs) {
+		return nil, errors.New("relevantAccounts: mentions length did not correspond with mentionIDs length")
+	}
+
+	// if getBoosted is set, we should check the same properties on the boosted account as well
+	if getBoosted {
+		// 4, 5, 6. Boosted status items
+		// get the boosted status if it's not set on the status already
+		if status.BoostOfID != "" && status.BoostOf == nil {
+			boostedStatus, err := f.db.GetStatusByID(status.BoostOfID)
+			if err != nil {
+				return nil, fmt.Errorf("relevantAccounts: error getting boosted status with id %s: %s", status.BoostOfID, err)
+			}
+			status.BoostOf = boostedStatus
+		}
+
+		if status.BoostOf != nil {
+			// return relevant accounts for the boosted status
+			boostedRelAccts, err := f.relevantAccounts(status.BoostOf, false) // false because we don't want to recurse
+			if err != nil {
+				return nil, fmt.Errorf("relevantAccounts: error getting relevant accounts of boosted status %s: %s", status.BoostOf.ID, err)
+			}
+			relAccts.BoostedAccount = boostedRelAccts.Account
+			relAccts.BoostedInReplyToAccount = boostedRelAccts.InReplyToAccount
+			relAccts.BoostedMentionedAccounts = boostedRelAccts.MentionedAccounts
+		}
+	}
+
+	return relAccts, nil
+}
+
+// domainBlockedRelevant checks through all relevant accounts attached to a status
+// to make sure none of them are domain blocked by this instance.
+func (f *filter) domainBlockedRelevant(r *relevantAccounts) (bool, error) {
+	domains := []string{}
+
+	if r.Account != nil {
+		domains = append(domains, r.Account.Domain)
+	}
+
+	if r.InReplyToAccount != nil {
+		domains = append(domains, r.InReplyToAccount.Domain)
+	}
+
+	for _, a := range r.MentionedAccounts {
+		if a != nil {
+			domains = append(domains, a.Domain)
+		}
+	}
+
+	if r.BoostedAccount != nil {
+		domains = append(domains, r.BoostedAccount.Domain)
+	}
+
+	if r.BoostedInReplyToAccount != nil {
+		domains = append(domains, r.BoostedInReplyToAccount.Domain)
+	}
+
+	for _, a := range r.BoostedMentionedAccounts {
+		if a != nil {
+			domains = append(domains, a.Domain)
+		}
+	}
+
+	return f.db.AreDomainsBlocked(domains)
+}
+
+func idIn(id string, mentions []*gtsmodel.Mention) bool {
+	for _, m := range mentions {
+		if m == nil {
+			continue
+		}
+		if m.ID == id {
+			return true
+		}
+	}
+	return false
+}
+
+func mentionIn(mention *gtsmodel.Mention, ids []string) bool {
+	if mention == nil {
+		return false
+	}
+	for _, i := range ids {
+		if mention.ID == i {
+			return true
+		}
+	}
+	return false
+}
diff --git a/internal/visibility/statushometimelineable.go b/internal/visibility/statushometimelineable.go
index bc5f7bcb8..a3ca62fb3 100644
--- a/internal/visibility/statushometimelineable.go
+++ b/internal/visibility/statushometimelineable.go
@@ -1,3 +1,21 @@
+/*
+   GoToSocial
+   Copyright (C) 2021 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 (
@@ -28,6 +46,13 @@ func (f *filter) StatusHometimelineable(targetStatus *gtsmodel.Status, timelineO
 		return false, nil
 	}
 
+	for _, m := range targetStatus.Mentions {
+		if m.TargetAccountID == timelineOwnerAccount.ID {
+			// if we're mentioned we should be able to see the post
+			return true, nil
+		}
+	}
+
 	// Don't timeline a status whose parent hasn't been dereferenced yet or can't be dereferenced.
 	// If we have the reply to URI but don't have an ID for the replied-to account or the replied-to status in our database, we haven't dereferenced it yet.
 	if targetStatus.InReplyToURI != "" && (targetStatus.InReplyToID == "" || targetStatus.InReplyToAccountID == "") {
@@ -37,21 +62,21 @@ func (f *filter) StatusHometimelineable(targetStatus *gtsmodel.Status, timelineO
 	// if a status replies to an ID we know in the database, we need to make sure we also follow the replied-to status owner account
 	if targetStatus.InReplyToID != "" {
 		// pin the reply to status on to this status if it hasn't been done already
-		if targetStatus.GTSReplyToStatus == nil {
-			rs := &gtsmodel.Status{}
-			if err := f.db.GetByID(targetStatus.InReplyToID, rs); err != nil {
+		if targetStatus.InReplyTo == nil {
+			rs, err := f.db.GetStatusByID(targetStatus.InReplyToID)
+			if err != nil {
 				return false, fmt.Errorf("StatusHometimelineable: error getting replied to status with id %s: %s", targetStatus.InReplyToID, err)
 			}
-			targetStatus.GTSReplyToStatus = rs
+			targetStatus.InReplyTo = rs
 		}
 
 		// pin the reply to account on to this status if it hasn't been done already
-		if targetStatus.GTSReplyToAccount == nil {
-			ra := &gtsmodel.Account{}
-			if err := f.db.GetByID(targetStatus.InReplyToAccountID, ra); err != nil {
+		if targetStatus.InReplyToAccount == nil {
+			ra, err := f.db.GetAccountByID(targetStatus.InReplyToAccountID)
+			if err != nil {
 				return false, fmt.Errorf("StatusHometimelineable: error getting replied to account with id %s: %s", targetStatus.InReplyToAccountID, err)
 			}
-			targetStatus.GTSReplyToAccount = ra
+			targetStatus.InReplyToAccount = ra
 		}
 
 		// if it's a reply to the timelineOwnerAccount, we don't need to check if the timelineOwnerAccount follows itself, just return true, they can see it
@@ -60,7 +85,7 @@ func (f *filter) StatusHometimelineable(targetStatus *gtsmodel.Status, timelineO
 		}
 
 		// the replied-to account != timelineOwnerAccount, so make sure the timelineOwnerAccount follows the replied-to account
-		follows, err := f.db.Follows(timelineOwnerAccount, targetStatus.GTSReplyToAccount)
+		follows, err := f.db.IsFollowing(timelineOwnerAccount, targetStatus.InReplyToAccount)
 		if err != nil {
 			return false, fmt.Errorf("StatusHometimelineable: error checking follow from account %s to account %s: %s", timelineOwnerAccount.ID, targetStatus.InReplyToAccountID, err)
 		}
diff --git a/internal/visibility/statuspublictimelineable.go b/internal/visibility/statuspublictimelineable.go
index d7f68faee..f07e06aae 100644
--- a/internal/visibility/statuspublictimelineable.go
+++ b/internal/visibility/statuspublictimelineable.go
@@ -1,3 +1,21 @@
+/*
+   GoToSocial
+   Copyright (C) 2021 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 (
diff --git a/internal/visibility/statusvisible.go b/internal/visibility/statusvisible.go
index dc6b74702..15e545881 100644
--- a/internal/visibility/statusvisible.go
+++ b/internal/visibility/statusvisible.go
@@ -1,3 +1,21 @@
+/*
+   GoToSocial
+   Copyright (C) 2021 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 (
@@ -16,10 +34,11 @@ func (f *filter) StatusVisible(targetStatus *gtsmodel.Status, requestingAccount
 		"statusID": targetStatus.ID,
 	})
 
-	relevantAccounts, err := f.pullRelevantAccountsFromStatus(targetStatus)
+	getBoosted := true
+	relevantAccounts, err := f.relevantAccounts(targetStatus, getBoosted)
 	if err != nil {
 		l.Debugf("error pulling relevant accounts for status %s: %s", targetStatus.ID, err)
-		return false, fmt.Errorf("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)
 	}
 
 	domainBlocked, err := f.domainBlockedRelevant(relevantAccounts)
@@ -32,7 +51,12 @@ func (f *filter) StatusVisible(targetStatus *gtsmodel.Status, requestingAccount
 		return false, nil
 	}
 
-	targetAccount := relevantAccounts.StatusAuthor
+	targetAccount := relevantAccounts.Account
+	if targetAccount == nil {
+		l.Trace("target account is not set")
+		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")
@@ -45,7 +69,7 @@ func (f *filter) StatusVisible(targetStatus *gtsmodel.Status, requestingAccount
 		targetUser := &gtsmodel.User{}
 		if err := f.db.GetWhere([]db.Where{{Key: "account_id", Value: targetAccount.ID}}, targetUser); err != nil {
 			l.Debug("target user could not be selected")
-			if _, ok := err.(db.ErrNoEntries); ok {
+			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)
@@ -76,7 +100,7 @@ func (f *filter) StatusVisible(targetStatus *gtsmodel.Status, requestingAccount
 		if err := f.db.GetWhere([]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 _, ok := err.(db.ErrNoEntries); ok {
+			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)
@@ -102,7 +126,7 @@ func (f *filter) StatusVisible(targetStatus *gtsmodel.Status, requestingAccount
 
 	// 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.Blocked(targetAccount.ID, requestingAccount.ID); err != nil {
+	if blocked, err := f.db.IsBlocked(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 {
@@ -112,8 +136,8 @@ func (f *filter) StatusVisible(targetStatus *gtsmodel.Status, requestingAccount
 	}
 
 	// status replies to account id
-	if relevantAccounts.ReplyToAccount != nil && relevantAccounts.ReplyToAccount.ID != requestingAccount.ID {
-		if blocked, err := f.db.Blocked(relevantAccounts.ReplyToAccount.ID, requestingAccount.ID); err != nil {
+	if relevantAccounts.InReplyToAccount != nil && relevantAccounts.InReplyToAccount.ID != requestingAccount.ID {
+		if blocked, err := f.db.IsBlocked(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")
@@ -122,7 +146,7 @@ func (f *filter) StatusVisible(targetStatus *gtsmodel.Status, requestingAccount
 
 		// check reply to ID
 		if targetStatus.InReplyToID != "" && (targetStatus.Visibility == gtsmodel.VisibilityFollowersOnly || targetStatus.Visibility == gtsmodel.VisibilityDirect) {
-			followsRepliedAccount, err := f.db.Follows(requestingAccount, relevantAccounts.ReplyToAccount)
+			followsRepliedAccount, err := f.db.IsFollowing(requestingAccount, relevantAccounts.InReplyToAccount)
 			if err != nil {
 				return false, err
 			}
@@ -134,8 +158,8 @@ func (f *filter) StatusVisible(targetStatus *gtsmodel.Status, requestingAccount
 	}
 
 	// status boosts accounts id
-	if relevantAccounts.BoostedStatusAuthor != nil {
-		if blocked, err := f.db.Blocked(relevantAccounts.BoostedStatusAuthor.ID, requestingAccount.ID); err != nil {
+	if relevantAccounts.BoostedAccount != nil {
+		if blocked, err := f.db.IsBlocked(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")
@@ -144,8 +168,8 @@ func (f *filter) StatusVisible(targetStatus *gtsmodel.Status, requestingAccount
 	}
 
 	// status boosts a reply to account id
-	if relevantAccounts.BoostedReplyToAccount != nil {
-		if blocked, err := f.db.Blocked(relevantAccounts.BoostedReplyToAccount.ID, requestingAccount.ID); err != nil {
+	if relevantAccounts.BoostedInReplyToAccount != nil {
+		if blocked, err := f.db.IsBlocked(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")
@@ -155,7 +179,10 @@ func (f *filter) StatusVisible(targetStatus *gtsmodel.Status, requestingAccount
 
 	// status mentions accounts
 	for _, a := range relevantAccounts.MentionedAccounts {
-		if blocked, err := f.db.Blocked(a.ID, requestingAccount.ID); err != nil {
+		if a == nil {
+			continue
+		}
+		if blocked, err := f.db.IsBlocked(a.ID, requestingAccount.ID, true); err != nil {
 			return false, err
 		} else if blocked {
 			l.Trace("a block exists between requesting account and a mentioned account")
@@ -165,7 +192,10 @@ func (f *filter) StatusVisible(targetStatus *gtsmodel.Status, requestingAccount
 
 	// boost mentions accounts
 	for _, a := range relevantAccounts.BoostedMentionedAccounts {
-		if blocked, err := f.db.Blocked(a.ID, requestingAccount.ID); err != nil {
+		if a == nil {
+			continue
+		}
+		if blocked, err := f.db.IsBlocked(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")
@@ -175,6 +205,9 @@ func (f *filter) StatusVisible(targetStatus *gtsmodel.Status, requestingAccount
 
 	// if the requesting account is mentioned in the status it should always be visible
 	for _, acct := range relevantAccounts.MentionedAccounts {
+		if acct == nil {
+			continue
+		}
 		if acct.ID == requestingAccount.ID {
 			return true, nil // yep it's mentioned!
 		}
@@ -188,7 +221,7 @@ func (f *filter) StatusVisible(targetStatus *gtsmodel.Status, requestingAccount
 		return true, nil
 	case gtsmodel.VisibilityFollowersOnly:
 		// check one-way follow
-		follows, err := f.db.Follows(requestingAccount, targetAccount)
+		follows, err := f.db.IsFollowing(requestingAccount, targetAccount)
 		if err != nil {
 			return false, err
 		}
@@ -199,7 +232,7 @@ func (f *filter) StatusVisible(targetStatus *gtsmodel.Status, requestingAccount
 		return true, nil
 	case gtsmodel.VisibilityMutualsOnly:
 		// check mutual follow
-		mutuals, err := f.db.Mutuals(requestingAccount, targetAccount)
+		mutuals, err := f.db.IsMutualFollowing(requestingAccount, targetAccount)
 		if err != nil {
 			return false, err
 		}
diff --git a/internal/visibility/util.go b/internal/visibility/util.go
deleted file mode 100644
index a12dd555f..000000000
--- a/internal/visibility/util.go
+++ /dev/null
@@ -1,191 +0,0 @@
-package visibility
-
-import (
-	"fmt"
-
-	"github.com/superseriousbusiness/gotosocial/internal/db"
-	"github.com/superseriousbusiness/gotosocial/internal/gtsmodel"
-)
-
-func (f *filter) pullRelevantAccountsFromStatus(targetStatus *gtsmodel.Status) (*relevantAccounts, error) {
-	accounts := &relevantAccounts{
-		MentionedAccounts:        []*gtsmodel.Account{},
-		BoostedMentionedAccounts: []*gtsmodel.Account{},
-	}
-
-	// get the author account
-	if targetStatus.GTSAuthorAccount == nil {
-		statusAuthor := &gtsmodel.Account{}
-		if err := f.db.GetByID(targetStatus.AccountID, statusAuthor); err != nil {
-			return accounts, fmt.Errorf("PullRelevantAccountsFromStatus: error getting statusAuthor with id %s: %s", targetStatus.AccountID, err)
-		}
-		targetStatus.GTSAuthorAccount = statusAuthor
-	}
-	accounts.StatusAuthor = targetStatus.GTSAuthorAccount
-
-	// get the replied to account from the status and add it to the pile
-	if targetStatus.InReplyToAccountID != "" {
-		repliedToAccount := &gtsmodel.Account{}
-		if err := f.db.GetByID(targetStatus.InReplyToAccountID, repliedToAccount); err != nil {
-			return accounts, fmt.Errorf("PullRelevantAccountsFromStatus: error getting repliedToAcount with id %s: %s", targetStatus.InReplyToAccountID, err)
-		}
-		accounts.ReplyToAccount = repliedToAccount
-	}
-
-	// now get all accounts with IDs that are mentioned in the status
-	for _, mentionID := range targetStatus.Mentions {
-
-		mention := &gtsmodel.Mention{}
-		if err := f.db.GetByID(mentionID, mention); err != nil {
-			return accounts, fmt.Errorf("PullRelevantAccountsFromStatus: error getting mention with id %s: %s", mentionID, err)
-		}
-
-		mentionedAccount := &gtsmodel.Account{}
-		if err := f.db.GetByID(mention.TargetAccountID, mentionedAccount); err != nil {
-			return accounts, fmt.Errorf("PullRelevantAccountsFromStatus: error getting mentioned account: %s", err)
-		}
-		accounts.MentionedAccounts = append(accounts.MentionedAccounts, mentionedAccount)
-	}
-
-	// get the boosted account from the status and add it to the pile
-	if targetStatus.BoostOfID != "" {
-		// retrieve the boosted status first
-		boostedStatus := &gtsmodel.Status{}
-		if err := f.db.GetByID(targetStatus.BoostOfID, boostedStatus); err != nil {
-			return accounts, fmt.Errorf("PullRelevantAccountsFromStatus: error getting boostedStatus with id %s: %s", targetStatus.BoostOfID, err)
-		}
-		boostedAccount := &gtsmodel.Account{}
-		if err := f.db.GetByID(boostedStatus.AccountID, boostedAccount); err != nil {
-			return accounts, fmt.Errorf("PullRelevantAccountsFromStatus: error getting boostedAccount with id %s: %s", boostedStatus.AccountID, err)
-		}
-		accounts.BoostedStatusAuthor = boostedAccount
-
-		// the boosted status might be a reply to another account so we should get that too
-		if boostedStatus.InReplyToAccountID != "" {
-			boostedStatusRepliedToAccount := &gtsmodel.Account{}
-			if err := f.db.GetByID(boostedStatus.InReplyToAccountID, boostedStatusRepliedToAccount); err != nil {
-				return accounts, fmt.Errorf("PullRelevantAccountsFromStatus: error getting boostedStatusRepliedToAccount with id %s: %s", boostedStatus.InReplyToAccountID, err)
-			}
-			accounts.BoostedReplyToAccount = boostedStatusRepliedToAccount
-		}
-
-		// now get all accounts with IDs that are mentioned in the status
-		for _, mentionID := range boostedStatus.Mentions {
-			mention := &gtsmodel.Mention{}
-			if err := f.db.GetByID(mentionID, mention); err != nil {
-				return accounts, fmt.Errorf("PullRelevantAccountsFromStatus: error getting boosted mention with id %s: %s", mentionID, err)
-			}
-
-			mentionedAccount := &gtsmodel.Account{}
-			if err := f.db.GetByID(mention.TargetAccountID, mentionedAccount); err != nil {
-				return accounts, fmt.Errorf("PullRelevantAccountsFromStatus: error getting boosted mentioned account: %s", err)
-			}
-			accounts.BoostedMentionedAccounts = append(accounts.BoostedMentionedAccounts, mentionedAccount)
-		}
-	}
-
-	return accounts, nil
-}
-
-// relevantAccounts denotes accounts that are replied to, boosted by, or mentioned in a status.
-type relevantAccounts struct {
-	// Who wrote the status
-	StatusAuthor *gtsmodel.Account
-	// Who is the status replying to
-	ReplyToAccount *gtsmodel.Account
-	// Which accounts are mentioned (tagged) in the status
-	MentionedAccounts []*gtsmodel.Account
-	// Who authed the boosted status
-	BoostedStatusAuthor *gtsmodel.Account
-	// If the boosted status replies to another account, who does it reply to?
-	BoostedReplyToAccount *gtsmodel.Account
-	// Who is mentioned (tagged) in the boosted status
-	BoostedMentionedAccounts []*gtsmodel.Account
-}
-
-// blockedDomain checks whether the given domain is blocked by us or not
-func (f *filter) blockedDomain(host string) (bool, error) {
-	b := &gtsmodel.DomainBlock{}
-	err := f.db.GetWhere([]db.Where{{Key: "domain", Value: host, CaseInsensitive: true}}, b)
-	if err == nil {
-		// block exists
-		return true, nil
-	}
-
-	if _, ok := err.(db.ErrNoEntries); ok {
-		// there are no entries so there's no block
-		return false, nil
-	}
-
-	// there's an actual error
-	return false, err
-}
-
-// domainBlockedRelevant checks through all relevant accounts attached to a status
-// to make sure none of them are domain blocked by this instance.
-//
-// Will return true+nil if there's a block, false+nil if there's no block, or
-// an error if something goes wrong.
-func (f *filter) domainBlockedRelevant(r *relevantAccounts) (bool, error) {
-	if r.StatusAuthor != nil {
-		b, err := f.blockedDomain(r.StatusAuthor.Domain)
-		if err != nil {
-			return false, err
-		}
-		if b {
-			return true, nil
-		}
-	}
-
-	if r.ReplyToAccount != nil {
-		b, err := f.blockedDomain(r.ReplyToAccount.Domain)
-		if err != nil {
-			return false, err
-		}
-		if b {
-			return true, nil
-		}
-	}
-
-	for _, a := range r.MentionedAccounts {
-		b, err := f.blockedDomain(a.Domain)
-		if err != nil {
-			return false, err
-		}
-		if b {
-			return true, nil
-		}
-	}
-
-	if r.BoostedStatusAuthor != nil {
-		b, err := f.blockedDomain(r.BoostedStatusAuthor.Domain)
-		if err != nil {
-			return false, err
-		}
-		if b {
-			return true, nil
-		}
-	}
-
-	if r.BoostedReplyToAccount != nil {
-		b, err := f.blockedDomain(r.BoostedReplyToAccount.Domain)
-		if err != nil {
-			return false, err
-		}
-		if b {
-			return true, nil
-		}
-	}
-
-	for _, a := range r.BoostedMentionedAccounts {
-		b, err := f.blockedDomain(a.Domain)
-		if err != nil {
-			return false, err
-		}
-		if b {
-			return true, nil
-		}
-	}
-
-	return false, nil
-}