/
core_group.go
1328 lines (1166 loc) · 44.1 KB
/
core_group.go
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// Copyright 2018 The Nakama Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package server
import (
"bytes"
"context"
"database/sql"
"encoding/base64"
"encoding/gob"
"encoding/json"
"fmt"
"strconv"
"strings"
"time"
"github.com/cockroachdb/cockroach-go/crdb"
"github.com/gofrs/uuid"
"github.com/golang/protobuf/ptypes/timestamp"
"github.com/golang/protobuf/ptypes/wrappers"
"github.com/heroiclabs/nakama/api"
"github.com/lib/pq"
"github.com/pkg/errors"
"go.uber.org/zap"
"google.golang.org/grpc/codes"
"google.golang.org/grpc/status"
)
var (
ErrGroupNameInUse = errors.New("group name in use")
ErrGroupPermissionDenied = errors.New("group permission denied")
ErrGroupNoUpdateOps = errors.New("no group updates")
ErrGroupNotUpdated = errors.New("group not updated")
ErrGroupNotFound = errors.New("group not found")
ErrGroupFull = errors.New("group is full")
ErrGroupLastSuperadmin = errors.New("user is last group superadmin")
)
type groupListCursor struct {
Lang string
EdgeCount int32
ID uuid.UUID
}
func CreateGroup(ctx context.Context, logger *zap.Logger, db *sql.DB, userID uuid.UUID, creatorID uuid.UUID, name, lang, desc, avatarURL, metadata string, open bool, maxCount int) (*api.Group, error) {
if userID == uuid.Nil {
logger.Panic("This function must be used with non-system user ID.")
}
state := 1
if open {
state = 0
}
params := []interface{}{uuid.Must(uuid.NewV4()), creatorID, name, desc, avatarURL, state}
statements := []string{"$1", "$2", "$3", "$4", "$5", "$6"}
query := "INSERT INTO groups(id, creator_id, name, description, avatar_url, state"
// Add lang tag if any.
if lang != "" {
query += ", lang_tag"
params = append(params, lang)
statements = append(statements, "$"+strconv.Itoa(len(params)))
}
// Add max count if any.
if maxCount > 0 {
query += ", max_count"
params = append(params, maxCount)
statements = append(statements, "$"+strconv.Itoa(len(params)))
}
// Add metadata if any.
if metadata != "" {
query += ", metadata"
params = append(params, metadata)
statements = append(statements, "$"+strconv.Itoa(len(params)))
}
// Add the trailing edge count value.
query += `, edge_count) VALUES (` + strings.Join(statements, ",") + `,1)
RETURNING id, creator_id, name, description, avatar_url, state, edge_count, lang_tag, max_count, metadata, create_time, update_time`
tx, err := db.BeginTx(ctx, nil)
if err != nil {
logger.Error("Could not begin database transaction.", zap.Error(err))
return nil, err
}
var group *api.Group
if err = crdb.ExecuteInTx(ctx, tx, func() error {
rows, err := tx.QueryContext(ctx, query, params...)
if err != nil {
logger.Debug("Could not create group.", zap.Error(err))
return err
}
// Rows closed in groupConvertRows()
groups, err := groupConvertRows(rows)
if err != nil {
if e, ok := err.(*pq.Error); ok && e.Code == dbErrorUniqueViolation {
logger.Info("Could not create group as it already exists.", zap.String("name", name))
return ErrGroupNameInUse
}
logger.Debug("Could not parse rows.", zap.Error(err))
return err
}
group = groups[0]
_, err = groupAddUser(ctx, db, tx, uuid.Must(uuid.FromString(group.Id)), userID, 0)
if err != nil {
logger.Debug("Could not add user to group.", zap.Error(err))
return err
}
return nil
}); err != nil {
if err == ErrGroupNameInUse {
return nil, ErrGroupNameInUse
}
logger.Error("Error creating group.", zap.Error(err))
return nil, err
}
return group, nil
}
func UpdateGroup(ctx context.Context, logger *zap.Logger, db *sql.DB, groupID uuid.UUID, userID uuid.UUID, creatorID uuid.UUID, name, lang, desc, avatar, metadata *wrappers.StringValue, open *wrappers.BoolValue, maxCount int) error {
if userID != uuid.Nil {
allowedUser, err := groupCheckUserPermission(ctx, logger, db, groupID, userID, 1)
if err != nil {
return err
}
if !allowedUser {
logger.Info("User does not have permission to update group.", zap.String("group", groupID.String()), zap.String("user", userID.String()))
return ErrGroupPermissionDenied
}
}
statements := make([]string, 0)
params := []interface{}{groupID}
index := 2
if name != nil {
statements = append(statements, "name = $"+strconv.Itoa(index))
params = append(params, name.GetValue())
index++
}
if lang != nil {
statements = append(statements, "lang_tag = $"+strconv.Itoa(index))
params = append(params, lang.GetValue())
index++
}
if desc != nil {
if u := desc.GetValue(); u == "" {
statements = append(statements, "description = NULL")
} else {
statements = append(statements, "description = $"+strconv.Itoa(index))
params = append(params, u)
index++
}
}
if avatar != nil {
if u := avatar.GetValue(); u == "" {
statements = append(statements, "avatar_url = NULL")
} else {
statements = append(statements, "avatar_url = $"+strconv.Itoa(index))
params = append(params, u)
index++
}
}
if open != nil {
state := 0
if !open.GetValue() {
state = 1
}
statements = append(statements, "state = $"+strconv.Itoa(index))
params = append(params, state)
index++
}
if metadata != nil {
statements = append(statements, "metadata = $"+strconv.Itoa(index))
params = append(params, metadata.GetValue())
index++
}
if maxCount >= 1 {
statements = append(statements, "max_count = $"+strconv.Itoa(index))
params = append(params, maxCount)
index++
}
if creatorID != uuid.Nil {
statements = append(statements, "creator_id = $"+strconv.Itoa(index))
params = append(params, creatorID)
}
if len(statements) == 0 {
logger.Info("Did not update group as no fields were changed.")
return ErrGroupNoUpdateOps
}
query := "UPDATE groups SET update_time = now(), " + strings.Join(statements, ", ") + " WHERE (id = $1) AND (disable_time = '1970-01-01 00:00:00 UTC')"
res, err := db.ExecContext(ctx, query, params...)
if err != nil {
if e, ok := err.(*pq.Error); ok && e.Code == dbErrorUniqueViolation {
logger.Info("Could not update group as it already exists.", zap.String("group_id", groupID.String()))
return ErrGroupNameInUse
}
logger.Error("Could not update group.", zap.Error(err))
return err
}
if rowsAffected, err := res.RowsAffected(); err != nil {
logger.Error("Could not get rows affected after group update query.", zap.Error(err))
return err
} else {
if rowsAffected == 0 {
return ErrGroupNotUpdated
}
return nil
}
}
func DeleteGroup(ctx context.Context, logger *zap.Logger, db *sql.DB, groupID uuid.UUID, userID uuid.UUID) error {
if userID != uuid.Nil {
// only super-admins can delete group.
allowedUser, err := groupCheckUserPermission(ctx, logger, db, groupID, userID, 0)
if err != nil {
return err
}
if !allowedUser {
logger.Info("User does not have permission to delete group.", zap.String("group_id", groupID.String()), zap.String("user_id", userID.String()))
return ErrGroupPermissionDenied
}
}
tx, err := db.BeginTx(ctx, nil)
if err != nil {
logger.Error("Could not begin database transaction.", zap.Error(err))
return err
}
if err = crdb.ExecuteInTx(ctx, tx, func() error {
return deleteGroup(ctx, logger, tx, groupID)
}); err != nil {
logger.Error("Error deleting group.", zap.Error(err))
return err
}
return nil
}
func JoinGroup(ctx context.Context, logger *zap.Logger, db *sql.DB, router MessageRouter, groupID uuid.UUID, userID uuid.UUID, username string) error {
query := `
SELECT id, creator_id, name, description, avatar_url, state, edge_count, lang_tag, max_count, metadata, create_time, update_time
FROM groups
WHERE (id = $1) AND (disable_time = '1970-01-01 00:00:00 UTC')`
rows, err := db.QueryContext(ctx, query, groupID)
if err != nil {
logger.Error("Could not look up group while trying to join it.", zap.Error(err))
return err
}
// Rows closed in groupConvertRows()
groups, err := groupConvertRows(rows)
if err != nil {
logger.Error("Could not parse groups.", zap.Error(err))
return err
}
if len(groups) == 0 {
logger.Info("Group does not exist.", zap.Error(err), zap.String("group_id", groupID.String()))
return ErrGroupNotFound
}
group := groups[0]
if group.EdgeCount >= group.MaxCount {
logger.Info("Group maximum count has reached.", zap.Error(err), zap.String("group_id", groupID.String()))
return ErrGroupFull
}
state := 2
if !group.Open.Value {
state = 3
_, err = groupAddUser(ctx, db, nil, uuid.Must(uuid.FromString(group.Id)), userID, state)
if err != nil {
if e, ok := err.(*pq.Error); ok && e.Code == dbErrorUniqueViolation {
logger.Info("Could not add user to group as relationship already exists.", zap.String("group_id", groupID.String()), zap.String("user_id", userID.String()))
return nil // completed successfully
}
logger.Error("Could not add user to group.", zap.String("group_id", groupID.String()), zap.String("user_id", userID.String()))
return err
}
// If it's a private group notify superadmins/admins that someone has requested to join.
// Prepare notification data.
notificationContentBytes, err := json.Marshal(map[string]string{"username": username})
if err != nil {
logger.Error("Could not encode notification content.", zap.Error(err))
} else {
notificationContent := string(notificationContentBytes)
notificationSubject := fmt.Sprintf("User %v wants to join your group", username)
notifications := make(map[uuid.UUID][]*api.Notification)
query = "SELECT destination_id FROM group_edge WHERE source_id = $1::UUID AND (state = 0 OR state = 1)"
rows, err := db.QueryContext(ctx, query, groupID)
if err != nil {
// Errors here will not cause the join operation to fail.
logger.Error("Error looking up group admins to notify of join request.", zap.Error(err))
} else {
for rows.Next() {
var id string
if err = rows.Scan(&id); err != nil {
// Errors here will not cause the join operation to fail.
logger.Error("Error reading up group admins to notify of join request.", zap.Error(err))
break
}
adminID := uuid.FromStringOrNil(id)
notifications[adminID] = []*api.Notification{
&api.Notification{
Id: uuid.Must(uuid.NewV4()).String(),
Subject: notificationSubject,
Content: notificationContent,
SenderId: userID.String(),
Code: NotificationCodeGroupJoinRequest,
Persistent: true,
CreateTime: ×tamp.Timestamp{Seconds: time.Now().UTC().Unix()},
},
}
}
rows.Close()
}
if len(notifications) > 0 {
NotificationSend(ctx, logger, db, router, notifications)
}
}
logger.Info("Added join request to group.", zap.String("group_id", groupID.String()), zap.String("user_id", userID.String()))
return nil
}
tx, err := db.BeginTx(ctx, nil)
if err != nil {
logger.Error("Could not begin database transaction.", zap.Error(err))
return err
}
if err = crdb.ExecuteInTx(ctx, tx, func() error {
if _, err = groupAddUser(ctx, db, tx, uuid.Must(uuid.FromString(group.Id)), userID, state); err != nil {
if e, ok := err.(*pq.Error); ok && e.Code == dbErrorUniqueViolation {
logger.Info("Could not add user to group as relationship already exists.", zap.String("group_id", groupID.String()), zap.String("user_id", userID.String()))
return e
}
logger.Debug("Could not add user to group.", zap.String("group_id", groupID.String()), zap.String("user_id", userID.String()))
return err
}
query = "UPDATE groups SET edge_count = edge_count + 1, update_time = now() WHERE id = $1::UUID AND edge_count+1 <= max_count"
if _, err = tx.ExecContext(ctx, query, groupID); err != nil {
logger.Debug("Could not update group edge_count.", zap.String("group_id", groupID.String()), zap.String("user_id", userID.String()))
return err
}
return nil
}); err != nil {
if e, ok := err.(*pq.Error); ok && e.Code == dbErrorUniqueViolation {
// No-op, user was already in group.
return nil
}
logger.Error("Error joining group.", zap.Error(err))
return err
}
logger.Info("Successfully joined group.", zap.String("group_id", groupID.String()), zap.String("user_id", userID.String()))
return nil
}
func LeaveGroup(ctx context.Context, logger *zap.Logger, db *sql.DB, groupID uuid.UUID, userID uuid.UUID) error {
var myState sql.NullInt64
query := "SELECT state FROM group_edge WHERE source_id = $1::UUID AND destination_id = $2::UUID"
if err := db.QueryRowContext(ctx, query, groupID, userID).Scan(&myState); err != nil {
if err == sql.ErrNoRows {
logger.Info("Could not retrieve state as no group relationship exists.", zap.String("group_id", groupID.String()), zap.String("user_id", userID.String()))
return nil // Completed successfully.
}
logger.Error("Could not retrieve state from group_edge.", zap.Error(err), zap.String("group_id", groupID.String()), zap.String("user_id", userID.String()))
return err
}
if myState.Int64 == 0 {
// check for other superadmins
var otherSuperadminCount sql.NullInt64
query := "SELECT COUNT(destination_id) FROM group_edge WHERE source_id = $1::UUID AND destination_id != $2::UUID AND state = 0"
if err := db.QueryRowContext(ctx, query, groupID, userID).Scan(&otherSuperadminCount); err != nil {
logger.Error("Could not look up superadmin count group_edge.", zap.Error(err), zap.String("group_id", groupID.String()), zap.String("user_id", userID.String()))
return err
}
if otherSuperadminCount.Int64 == 0 {
logger.Info("Cannot leave group as user is last superadmin.", zap.String("group_id", groupID.String()), zap.String("user_id", userID.String()))
return ErrGroupLastSuperadmin
}
}
tx, err := db.BeginTx(ctx, nil)
if err != nil {
logger.Error("Could not begin database transaction.", zap.Error(err))
return err
}
if err := crdb.ExecuteInTx(ctx, tx, func() error {
query = "DELETE FROM group_edge WHERE (source_id = $1::UUID AND destination_id = $2::UUID) OR (source_id = $2::UUID AND destination_id = $1::UUID)"
// don't need to check affectedRows as we've confirmed the existence of the relationship above
if _, err = tx.ExecContext(ctx, query, groupID, userID); err != nil {
logger.Debug("Could not delete group_edge relationships.", zap.Error(err))
return err
}
// check to ensure we are not decrementing the count when the relationship was an invite.
if myState.Int64 < 3 {
query = "UPDATE groups SET edge_count = edge_count - 1, update_time = now() WHERE (id = $1::UUID) AND (disable_time = '1970-01-01 00:00:00 UTC')"
res, err := tx.ExecContext(ctx, query, groupID)
if err != nil {
logger.Debug("Could not update group edge_count.", zap.String("group_id", groupID.String()), zap.String("user_id", userID.String()))
return err
}
rowsAffected, err := res.RowsAffected()
if err != nil {
logger.Debug("Could not fetch affected rows.", zap.String("group_id", groupID.String()), zap.String("user_id", userID.String()))
return err
}
if rowsAffected == 0 {
logger.Debug("Did not update group edge_count as group is disabled.")
return ErrGroupNotFound
}
}
return nil
}); err != nil {
logger.Error("Error leaving group.", zap.Error(err))
return err
}
logger.Info("Successfully left group.", zap.String("group_id", groupID.String()), zap.String("user_id", userID.String()))
return nil
}
func AddGroupUsers(ctx context.Context, logger *zap.Logger, db *sql.DB, router MessageRouter, caller uuid.UUID, groupID uuid.UUID, userIDs []uuid.UUID) error {
if caller != uuid.Nil {
var dbState sql.NullInt64
query := "SELECT state FROM group_edge WHERE source_id = $1::UUID AND destination_id = $2::UUID"
if err := db.QueryRowContext(ctx, query, groupID, caller).Scan(&dbState); err != nil {
if err == sql.ErrNoRows {
logger.Info("Could not retrieve state as no group relationship exists.", zap.String("group_id", groupID.String()), zap.String("user_id", caller.String()))
return ErrGroupPermissionDenied
}
logger.Error("Could not retrieve state from group_edge.", zap.Error(err), zap.String("group_id", groupID.String()), zap.String("user_id", caller.String()))
return err
}
if dbState.Int64 > 1 {
logger.Info("Cannot add users as user does not have correct permissions.", zap.String("group_id", groupID.String()), zap.String("user_id", caller.String()), zap.Int64("state", dbState.Int64))
return ErrGroupPermissionDenied
}
}
var groupName sql.NullString
query := "SELECT name FROM groups WHERE id = $1 AND disable_time = '1970-01-01 00:00:00 UTC'"
if err := db.QueryRowContext(ctx, query, groupID).Scan(&groupName); err != nil {
if err == sql.ErrNoRows {
logger.Info("Cannot add users to disabled group.", zap.String("group_id", groupID.String()))
return ErrGroupNotFound
}
logger.Error("Could not look up group when adding users.", zap.Error(err), zap.String("group_id", groupID.String()))
return err
}
tx, err := db.BeginTx(ctx, nil)
if err != nil {
logger.Error("Could not begin database transaction.", zap.Error(err))
return err
}
// Prepare notification data.
notificationContentBytes, err := json.Marshal(map[string]string{"name": groupName.String})
if err != nil {
logger.Error("Could not encode notification content.", zap.Error(err))
return err
}
notificationContent := string(notificationContentBytes)
notificationSubject := fmt.Sprintf("You've been added to group %v", groupName.String)
var notifications map[uuid.UUID][]*api.Notification
if err := crdb.ExecuteInTx(ctx, tx, func() error {
// If the transaction is retried ensure we wipe any notifications that may have been prepared by previous attempts.
notifications = make(map[uuid.UUID][]*api.Notification, len(userIDs))
for _, uid := range userIDs {
if uid == caller {
continue
}
incrementEdgeCount := true
var userExists sql.NullBool
query := "SELECT EXISTS(SELECT 1 FROM group_edge WHERE source_id = $1::UUID AND destination_id = $2::UUID)"
if err := tx.QueryRowContext(ctx, query, groupID, uid).Scan(&userExists); err != nil {
logger.Debug("Could not retrieve user state from group_edge.", zap.Error(err), zap.String("group_id", groupID.String()), zap.String("user_id", uid.String()))
return err
}
if !userExists.Bool {
if _, err = groupAddUser(ctx, db, tx, groupID, uid, 2); err != nil {
logger.Debug("Could not add user to group.", zap.Error(err), zap.String("group_id", groupID.String()), zap.String("user_id", uid.String()))
return err
}
} else {
res, err := groupUpdateUserState(ctx, db, tx, groupID, uid, 3, 2)
if err != nil {
logger.Debug("Could not update user state in group_edge.", zap.Error(err), zap.String("group_id", groupID.String()), zap.String("user_id", uid.String()))
return err
}
if res != 2 {
incrementEdgeCount = false
}
}
if incrementEdgeCount {
query = "UPDATE groups SET edge_count = edge_count + 1, update_time = now() WHERE id = $1::UUID AND edge_count+1 <= max_count"
res, err := tx.ExecContext(ctx, query, groupID)
if err != nil {
logger.Debug("Could not update group edge_count.", zap.String("group_id", groupID.String()), zap.String("user_id", uid.String()))
return err
}
if rowsAffected, err := res.RowsAffected(); err != nil {
logger.Debug("Could not update group edge_count.", zap.Error(err), zap.String("group_id", groupID.String()), zap.String("user_id", uid.String()))
return err
} else if rowsAffected == 0 {
logger.Info("Could not add users as group maximum count was reached.", zap.String("group_id", groupID.String()), zap.String("user_id", uid.String()))
return ErrGroupFull
}
}
notifications[uid] = []*api.Notification{
&api.Notification{
Id: uuid.Must(uuid.NewV4()).String(),
Subject: notificationSubject,
Content: notificationContent,
SenderId: caller.String(),
Code: NotificationCodeGroupAdd,
Persistent: true,
CreateTime: ×tamp.Timestamp{Seconds: time.Now().UTC().Unix()},
},
}
}
return nil
}); err != nil {
return err
}
if len(notifications) > 0 {
NotificationSend(ctx, logger, db, router, notifications)
}
return nil
}
func KickGroupUsers(ctx context.Context, logger *zap.Logger, db *sql.DB, caller uuid.UUID, groupID uuid.UUID, userIDs []uuid.UUID) error {
myState := 0
if caller != uuid.Nil {
var dbState sql.NullInt64
query := "SELECT state FROM group_edge WHERE source_id = $1::UUID AND destination_id = $2::UUID"
if err := db.QueryRowContext(ctx, query, groupID, caller).Scan(&dbState); err != nil {
if err == sql.ErrNoRows {
logger.Info("Could not retrieve state as no group relationship exists.", zap.String("group_id", groupID.String()), zap.String("user_id", caller.String()))
return ErrGroupPermissionDenied
}
logger.Error("Could not retrieve state from group_edge.", zap.Error(err), zap.String("group_id", groupID.String()), zap.String("user_id", caller.String()))
return err
}
myState = int(dbState.Int64)
if myState > 1 {
logger.Info("Cannot kick users as user does not have correct permissions.", zap.String("group_id", groupID.String()), zap.String("user_id", caller.String()), zap.Int("state", myState))
return ErrGroupPermissionDenied
}
}
tx, err := db.BeginTx(ctx, nil)
if err != nil {
logger.Error("Could not begin database transaction.", zap.Error(err))
return err
}
if err := crdb.ExecuteInTx(ctx, tx, func() error {
for _, uid := range userIDs {
// shouldn't kick self
if uid == caller {
continue
}
params := []interface{}{groupID, uid}
query := ""
if myState == 0 {
// ensure we aren't removing the last superadmin when deleting authoritatively.
// query is for superadmin or if done authoritatively
query = `
DELETE FROM group_edge
WHERE
(
(source_id = $1::UUID AND destination_id = $2::UUID)
OR
(source_id = $2::UUID AND destination_id = $1::UUID)
)
AND
EXISTS (SELECT id FROM groups WHERE id = $1 AND disable_time = '1970-01-01 00:00:00 UTC')
AND
NOT (
(EXISTS (SELECT 1 FROM group_edge WHERE source_id = $1::UUID AND destination_id = $2::UUID AND state = 0))
AND
((SELECT COUNT(destination_id) FROM group_edge WHERE (source_id = $1::UUID AND destination_id != $2::UUID AND state = 0)) = 0)
)
RETURNING state`
} else {
// query is just for admins
query = `
DELETE FROM group_edge
WHERE
(
(source_id = $1::UUID AND destination_id = $2::UUID AND state > 1)
OR
(source_id = $2::UUID AND destination_id = $1::UUID AND state > 1)
)
AND
EXISTS (SELECT id FROM groups WHERE id = $1 AND disable_time = '1970-01-01 00:00:00 UTC')
RETURNING state`
}
var deletedState sql.NullInt64
logger.Debug("Kick user from group query.", zap.String("query", query), zap.String("group_id", groupID.String()), zap.String("user_id", uid.String()), zap.String("caller", caller.String()), zap.Int("caller_state", myState))
if err := tx.QueryRowContext(ctx, query, params...).Scan(&deletedState); err != nil {
if err == sql.ErrNoRows {
// ignore - move to the next uid
continue
} else {
logger.Debug("Could not delete relationship from group_edge.", zap.Error(err), zap.String("group_id", groupID.String()), zap.String("user_id", uid.String()))
return err
}
}
// make sure that we kicked valid members, not invites
if deletedState.Int64 < 3 {
query = "UPDATE groups SET edge_count = edge_count - 1, update_time = now() WHERE id = $1::UUID"
_, err = tx.ExecContext(ctx, query, groupID)
if err != nil {
logger.Debug("Could not update group edge_count.", zap.String("group_id", groupID.String()), zap.String("user_id", uid.String()))
return err
}
}
}
return nil
}); err != nil {
logger.Error("Error kicking users from group.", zap.Error(err))
return err
}
return nil
}
func PromoteGroupUsers(ctx context.Context, logger *zap.Logger, db *sql.DB, caller uuid.UUID, groupID uuid.UUID, userIDs []uuid.UUID) error {
myState := 0
if caller != uuid.Nil {
var dbState sql.NullInt64
query := "SELECT state FROM group_edge WHERE source_id = $1::UUID AND destination_id = $2::UUID"
if err := db.QueryRowContext(ctx, query, groupID, caller).Scan(&dbState); err != nil {
if err == sql.ErrNoRows {
logger.Info("Could not retrieve state as no group relationship exists.", zap.String("group_id", groupID.String()), zap.String("user_id", caller.String()))
return ErrGroupPermissionDenied
}
logger.Error("Could not retrieve state from group_edge.", zap.Error(err), zap.String("group_id", groupID.String()), zap.String("user_id", caller.String()))
return err
}
myState = int(dbState.Int64)
if myState > 1 {
logger.Info("Cannot promote users as user does not have correct permissions.", zap.String("group_id", groupID.String()), zap.String("user_id", caller.String()), zap.Int("state", myState))
return ErrGroupPermissionDenied
}
}
var groupExists sql.NullBool
query := "SELECT EXISTS (SELECT id FROM groups WHERE id = $1 AND disable_time = '1970-01-01 00:00:00 UTC')"
err := db.QueryRowContext(ctx, query, groupID).Scan(&groupExists)
if err != nil {
logger.Error("Could not look up group when promoting users.", zap.Error(err), zap.String("group_id", groupID.String()))
return err
}
if !groupExists.Bool {
logger.Info("Cannot promote users to disabled group.", zap.String("group_id", groupID.String()))
return ErrGroupNotFound
}
tx, err := db.BeginTx(ctx, nil)
if err != nil {
logger.Error("Could not begin database transaction.", zap.Error(err))
return err
}
if err := crdb.ExecuteInTx(ctx, tx, func() error {
for _, uid := range userIDs {
if uid == caller {
continue
}
query := `
UPDATE group_edge SET state = state - 1
WHERE
(source_id = $1::UUID AND destination_id = $2::UUID AND state > 0 AND state > $3)
OR
(source_id = $2::UUID AND destination_id = $1::UUID AND state > 0 AND state > $3)
RETURNING state`
var newState sql.NullInt64
if err := tx.QueryRowContext(ctx, query, groupID, uid, myState).Scan(&newState); err != nil {
if err == sql.ErrNoRows {
continue
}
logger.Debug("Could not promote user in group.", zap.Error(err), zap.String("group_id", groupID.String()), zap.String("user_id", uid.String()))
return err
}
if newState.Int64 == 2 {
query = "UPDATE groups SET edge_count = edge_count + 1, update_time = now() WHERE id = $1::UUID AND edge_count+1 <= max_count"
res, err := tx.ExecContext(ctx, query, groupID)
if err != nil {
logger.Debug("Could not update group edge_count.", zap.String("group_id", groupID.String()), zap.String("user_id", uid.String()), zap.Error(err))
return err
}
if rowsAffected, err := res.RowsAffected(); err != nil {
logger.Debug("Could not retrieve affect rows.", zap.String("group_id", groupID.String()), zap.String("user_id", uid.String()), zap.Error(err))
return err
} else if rowsAffected == 0 {
logger.Debug("Did not update group edge count - check edge count has not reached max count.", zap.String("group_id", groupID.String()), zap.String("user_id", uid.String()))
return ErrGroupFull
}
}
}
return nil
}); err != nil {
logger.Error("Error promote users in group.", zap.Error(err))
return err
}
return nil
}
func ListGroupUsers(ctx context.Context, logger *zap.Logger, db *sql.DB, tracker Tracker, groupID uuid.UUID) (*api.GroupUserList, error) {
query := `
SELECT u.id, u.username, u.display_name, u.avatar_url,
u.lang_tag, u.location, u.timezone, u.metadata,
u.facebook_id, u.google_id, u.gamecenter_id, u.steam_id, u.edge_count,
u.create_time, u.update_time, ge.state
FROM users u, group_edge ge
WHERE u.id = ge.source_id AND ge.destination_id = $1 AND u.disable_time = '1970-01-01 00:00:00 UTC'`
rows, err := db.QueryContext(ctx, query, groupID)
if err != nil {
if err == sql.ErrNoRows {
return nil, ErrGroupNotFound
}
logger.Debug("Could not list users in group.", zap.Error(err), zap.String("group_id", groupID.String()))
return nil, err
}
defer rows.Close()
groupUsers := make([]*api.GroupUserList_GroupUser, 0)
for rows.Next() {
var id string
var displayName sql.NullString
var username sql.NullString
var avatarURL sql.NullString
var langTag sql.NullString
var location sql.NullString
var timezone sql.NullString
var metadata []byte
var facebook sql.NullString
var google sql.NullString
var gamecenter sql.NullString
var steam sql.NullString
var edgeCount int
var createTime pq.NullTime
var updateTime pq.NullTime
var state sql.NullInt64
if err := rows.Scan(&id, &username, &displayName, &avatarURL, &langTag, &location, &timezone, &metadata,
&facebook, &google, &gamecenter, &steam, &edgeCount, &createTime, &updateTime, &state); err != nil {
if err == sql.ErrNoRows {
return nil, ErrGroupNotFound
}
logger.Error("Could not parse rows when listing users in a group.", zap.Error(err), zap.String("group_id", groupID.String()))
return nil, err
}
userID := uuid.Must(uuid.FromString(id))
user := &api.User{
Id: userID.String(),
Username: username.String,
DisplayName: displayName.String,
AvatarUrl: avatarURL.String,
LangTag: langTag.String,
Location: location.String,
Timezone: timezone.String,
Metadata: string(metadata),
FacebookId: facebook.String,
GoogleId: google.String,
GamecenterId: gamecenter.String,
SteamId: steam.String,
EdgeCount: int32(edgeCount),
CreateTime: ×tamp.Timestamp{Seconds: createTime.Time.Unix()},
UpdateTime: ×tamp.Timestamp{Seconds: updateTime.Time.Unix()},
Online: tracker.StreamExists(PresenceStream{Mode: StreamModeNotifications, Subject: userID}),
}
groupUser := &api.GroupUserList_GroupUser{
User: user,
State: &wrappers.Int32Value{
Value: int32(state.Int64),
},
}
groupUsers = append(groupUsers, groupUser)
}
return &api.GroupUserList{GroupUsers: groupUsers}, nil
}
func ListUserGroups(ctx context.Context, logger *zap.Logger, db *sql.DB, userID uuid.UUID) (*api.UserGroupList, error) {
query := `
SELECT id, creator_id, name, description, avatar_url,
lang_tag, metadata, groups.state, edge_count, max_count,
create_time, groups.update_time, group_edge.state
FROM groups
JOIN group_edge ON (group_edge.source_id = id)
WHERE group_edge.destination_id = $1 AND disable_time = '1970-01-01 00:00:00 UTC'`
rows, err := db.QueryContext(ctx, query, userID)
if err != nil {
if err == sql.ErrNoRows {
return nil, ErrGroupNotFound
}
logger.Debug("Could not list groups for a user.", zap.Error(err), zap.String("user_id", userID.String()))
return nil, err
}
defer rows.Close()
userGroups := make([]*api.UserGroupList_UserGroup, 0)
for rows.Next() {
var id string
var creatorID sql.NullString
var name sql.NullString
var description sql.NullString
var avatarURL sql.NullString
var lang sql.NullString
var metadata []byte
var state sql.NullInt64
var edgeCount sql.NullInt64
var maxCount sql.NullInt64
var createTime pq.NullTime
var updateTime pq.NullTime
var userState sql.NullInt64
if err := rows.Scan(&id, &creatorID, &name,
&description, &avatarURL, &lang, &metadata, &state,
&edgeCount, &maxCount, &createTime, &updateTime, &userState); err != nil {
if err == sql.ErrNoRows {
return nil, ErrGroupNotFound
}
logger.Error("Could not parse rows when listing groups for a user.", zap.Error(err), zap.String("user_id", userID.String()))
return nil, err
}
open := true
if state.Int64 == 1 {
open = false
}
group := &api.Group{
Id: uuid.Must(uuid.FromString(id)).String(),
CreatorId: uuid.Must(uuid.FromString(creatorID.String)).String(),
Name: name.String,
Description: description.String,
AvatarUrl: avatarURL.String,
LangTag: lang.String,
Metadata: string(metadata),
Open: &wrappers.BoolValue{Value: open},
EdgeCount: int32(edgeCount.Int64),
MaxCount: int32(maxCount.Int64),
CreateTime: ×tamp.Timestamp{Seconds: createTime.Time.Unix()},
UpdateTime: ×tamp.Timestamp{Seconds: updateTime.Time.Unix()},
}
userGroup := &api.UserGroupList_UserGroup{
Group: group,
State: &wrappers.Int32Value{
Value: int32(userState.Int64),
},
}
userGroups = append(userGroups, userGroup)
}
return &api.UserGroupList{UserGroups: userGroups}, nil
}
func GetGroups(ctx context.Context, logger *zap.Logger, db *sql.DB, ids []string) ([]*api.Group, error) {
if len(ids) == 0 {
return make([]*api.Group, 0), nil
}
statements := make([]string, 0, len(ids))
params := make([]interface{}, 0, len(ids))
for i, id := range ids {
statements = append(statements, "$"+strconv.Itoa(i+1))
params = append(params, id)
}
query := `SELECT id, creator_id, name, description, avatar_url, state, edge_count, lang_tag, max_count, metadata, create_time, update_time
FROM groups
WHERE disable_time = '1970-01-01 00:00:00 UTC'
AND id IN (` + strings.Join(statements, ",") + `)`
rows, err := db.QueryContext(ctx, query, params...)
if err != nil {
if err == sql.ErrNoRows {
return make([]*api.Group, 0), nil
}
logger.Error("Could not get groups.", zap.Error(err))
return nil, err
}
// Rows closed in groupConvertRows()
groups, err := groupConvertRows(rows)
if err != nil {
if err == sql.ErrNoRows {
return make([]*api.Group, 0), nil
}
logger.Error("Could not get groups.", zap.Error(err))
return nil, err
}
return groups, nil
}
func ListGroups(ctx context.Context, logger *zap.Logger, db *sql.DB, name string, limit int, cursorStr string) (*api.GroupList, error) {
var cursor *groupListCursor = nil
if cursorStr != "" {
cursor = &groupListCursor{}
if cb, err := base64.RawURLEncoding.DecodeString(cursorStr); err != nil {
logger.Warn("Could not base64 decode group listing cursor.", zap.String("cursor", cursorStr))
return nil, status.Error(codes.InvalidArgument, "Malformed cursor was used.")
} else {
if err := gob.NewDecoder(bytes.NewReader(cb)).Decode(cursor); err != nil {
logger.Warn("Could not decode group listing cursor.", zap.String("cursor", cursorStr))
return nil, status.Error(codes.InvalidArgument, "Malformed cursor was used.")
}
}
}
var query string
params := []interface{}{limit}
if name == "" {
query = `
SELECT id, creator_id, name, description, avatar_url, state, edge_count, lang_tag, max_count, metadata, create_time, update_time