gosora/common/alerts.go

386 lines
11 KiB
Go

/*
*
* Gosora Alerts System
* Copyright Azareal 2017 - 2020
*
*/
package common
import (
"database/sql"
"errors"
"strconv"
"strings"
"time"
//"fmt"
"github.com/Azareal/Gosora/common/phrases"
qgen "github.com/Azareal/Gosora/query_gen"
)
type Alert struct {
ASID int
ActorID int
TargetUserID int
Event string
ElementType string
ElementID int
CreatedAt time.Time
Extra string
Actor *User
}
type AlertStmts struct {
notifyWatchers *sql.Stmt
getWatchers *sql.Stmt
}
var alertStmts AlertStmts
// TODO: Move these statements into some sort of activity abstraction
// TODO: Rewrite the alerts logic
func init() {
DbInits.Add(func(acc *qgen.Accumulator) error {
alertStmts = AlertStmts{
notifyWatchers: acc.SimpleInsertInnerJoin(
qgen.DBInsert{"activity_stream_matches", "watcher,asid", ""},
qgen.DBJoin{"activity_stream", "activity_subscriptions", "activity_subscriptions.user, activity_stream.asid", "activity_subscriptions.targetType = activity_stream.elementType AND activity_subscriptions.targetID = activity_stream.elementID AND activity_subscriptions.user != activity_stream.actor", "asid=?", "", ""},
),
getWatchers: acc.SimpleInnerJoin("activity_stream", "activity_subscriptions", "activity_subscriptions.user", "activity_subscriptions.targetType = activity_stream.elementType AND activity_subscriptions.targetID = activity_stream.elementID AND activity_subscriptions.user != activity_stream.actor", "asid=?", "", ""),
}
return acc.FirstError()
})
}
const AlertsGrowHint = len(`{"msgs":[],"count":,"tc":}`) + 1 + 10
// TODO: See if we can json.Marshal instead?
func escapeTextInJson(in string) string {
in = strings.Replace(in, "\"", "\\\"", -1)
return strings.Replace(in, "/", "\\/", -1)
}
func BuildAlert(a Alert, user User /* The current user */) (out string, err error) {
var targetUser *User
if a.Actor == nil {
a.Actor, err = Users.Get(a.ActorID)
if err != nil {
return "", errors.New(phrases.GetErrorPhrase("alerts_no_actor"))
}
}
/*if a.ElementType != "forum" {
targetUser, err = users.Get(a.TargetUserID)
if err != nil {
LocalErrorJS("Unable to find the target user",w,r)
return
}
}*/
if a.Event == "friend_invite" {
return buildAlertString(".new_friend_invite", []string{a.Actor.Name}, a.Actor.Link, a.Actor.Avatar, a.ASID), nil
}
// Not that many events for us to handle in a forum
if a.ElementType == "forum" {
if a.Event == "reply" {
topic, err := Topics.Get(a.ElementID)
if err != nil {
DebugLogf("Unable to find linked topic %d", a.ElementID)
return "", errors.New(phrases.GetErrorPhrase("alerts_no_linked_topic"))
}
// Store the forum ID in the targetUser column instead of making a new one? o.O
// Add an additional column for extra information later on when we add the ability to link directly to posts. We don't need the forum data for now...
return buildAlertString(".forum_new_topic", []string{a.Actor.Name, topic.Title}, topic.Link, a.Actor.Avatar, a.ASID), nil
}
return buildAlertString(".forum_unknown_action", []string{a.Actor.Name}, "", a.Actor.Avatar, a.ASID), nil
}
var url, area, phraseName string
own := false
// TODO: Avoid loading a bit of data twice
switch a.ElementType {
case "convo":
convo, err := Convos.Get(a.ElementID)
if err != nil {
DebugLogf("Unable to find linked convo %d", a.ElementID)
return "", errors.New(phrases.GetErrorPhrase("alerts_no_linked_convo"))
}
url = convo.Link
case "topic":
topic, err := Topics.Get(a.ElementID)
if err != nil {
DebugLogf("Unable to find linked topic %d", a.ElementID)
return "", errors.New(phrases.GetErrorPhrase("alerts_no_linked_topic"))
}
url = topic.Link
area = topic.Title
own = a.TargetUserID == user.ID
case "user":
targetUser, err = Users.Get(a.ElementID)
if err != nil {
DebugLogf("Unable to find target user %d", a.ElementID)
return "", errors.New(phrases.GetErrorPhrase("alerts_no_target_user"))
}
area = targetUser.Name
url = targetUser.Link
own = a.TargetUserID == user.ID
case "post":
topic, err := TopicByReplyID(a.ElementID)
if err != nil {
DebugLogf("Unable to find linked topic by reply ID %d", a.ElementID)
return "", errors.New(phrases.GetErrorPhrase("alerts_no_linked_topic_by_reply"))
}
url = topic.Link
area = topic.Title
own = a.TargetUserID == user.ID
default:
return "", errors.New(phrases.GetErrorPhrase("alerts_invalid_elementtype"))
}
badEv := false
switch a.Event {
case "create", "like", "mention", "reply":
// skip
default:
badEv = true
}
if own && !badEv {
phraseName = "." + a.ElementType + "_own_" + a.Event
} else if !badEv {
phraseName = "." + a.ElementType + "_" + a.Event
} else if own {
phraseName = "." + a.ElementType + "_own"
} else {
phraseName = "." + a.ElementType
}
return buildAlertString(phraseName, []string{a.Actor.Name, area}, url, a.Actor.Avatar, a.ASID), nil
}
func buildAlertString(msg string, sub []string, path, avatar string, asid int) string {
var sb strings.Builder
buildAlertSb(&sb, msg, sub, path, avatar, asid)
return sb.String()
}
const AlertsGrowHint2 = len(`{"msg":"","sub":[],"path":"","img":"","id":}`) + 5 + 3 + 1 + 1 + 1
// TODO: Use a string builder?
func buildAlertSb(sb *strings.Builder, msg string, sub []string, path, avatar string, asid int) {
sb.WriteString(`{"msg":"`)
sb.WriteString(escapeTextInJson(msg))
sb.WriteString(`","sub":[`)
for i, it := range sub {
if i != 0 {
sb.WriteString(",\"")
} else {
sb.WriteString("\"")
}
sb.WriteString(escapeTextInJson(it))
sb.WriteString("\"")
}
sb.WriteString(`],"path":"`)
sb.WriteString(escapeTextInJson(path))
sb.WriteString(`","img":"`)
sb.WriteString(escapeTextInJson(avatar))
sb.WriteString(`","id":`)
sb.WriteString(strconv.Itoa(asid))
sb.WriteRune('}')
}
func BuildAlertSb(sb *strings.Builder, a *Alert, u *User /* The current user */) (err error) {
var targetUser *User
if a.Actor == nil {
a.Actor, err = Users.Get(a.ActorID)
if err != nil {
return errors.New(phrases.GetErrorPhrase("alerts_no_actor"))
}
}
/*if a.ElementType != "forum" {
targetUser, err = users.Get(a.TargetUserID)
if err != nil {
LocalErrorJS("Unable to find the target user",w,r)
return
}
}*/
if a.Event == "friend_invite" {
buildAlertSb(sb, ".new_friend_invite", []string{a.Actor.Name}, a.Actor.Link, a.Actor.Avatar, a.ASID)
return nil
}
// Not that many events for us to handle in a forum
if a.ElementType == "forum" {
if a.Event == "reply" {
topic, err := Topics.Get(a.ElementID)
if err != nil {
DebugLogf("Unable to find linked topic %d", a.ElementID)
return errors.New(phrases.GetErrorPhrase("alerts_no_linked_topic"))
}
// Store the forum ID in the targetUser column instead of making a new one? o.O
// Add an additional column for extra information later on when we add the ability to link directly to posts. We don't need the forum data for now...
buildAlertSb(sb, ".forum_new_topic", []string{a.Actor.Name, topic.Title}, topic.Link, a.Actor.Avatar, a.ASID)
return nil
}
buildAlertSb(sb, ".forum_unknown_action", []string{a.Actor.Name}, "", a.Actor.Avatar, a.ASID)
return nil
}
var url, area string
own := false
// TODO: Avoid loading a bit of data twice
switch a.ElementType {
case "convo":
convo, err := Convos.Get(a.ElementID)
if err != nil {
DebugLogf("Unable to find linked convo %d", a.ElementID)
return errors.New(phrases.GetErrorPhrase("alerts_no_linked_convo"))
}
url = convo.Link
case "topic":
topic, err := Topics.Get(a.ElementID)
if err != nil {
DebugLogf("Unable to find linked topic %d", a.ElementID)
return errors.New(phrases.GetErrorPhrase("alerts_no_linked_topic"))
}
url = topic.Link
area = topic.Title
own = a.TargetUserID == u.ID
case "user":
targetUser, err = Users.Get(a.ElementID)
if err != nil {
DebugLogf("Unable to find target user %d", a.ElementID)
return errors.New(phrases.GetErrorPhrase("alerts_no_target_user"))
}
area = targetUser.Name
url = targetUser.Link
own = a.TargetUserID == u.ID
case "post":
t, err := TopicByReplyID(a.ElementID)
if err != nil {
DebugLogf("Unable to find linked topic by reply ID %d", a.ElementID)
return errors.New(phrases.GetErrorPhrase("alerts_no_linked_topic_by_reply"))
}
url = t.Link
area = t.Title
own = a.TargetUserID == u.ID
default:
return errors.New(phrases.GetErrorPhrase("alerts_invalid_elementtype"))
}
sb.WriteString(`{"msg":".`)
sb.WriteString(a.ElementType)
if own {
sb.WriteString("_own_")
} else {
sb.WriteRune('_')
}
switch a.Event {
case "create", "like", "mention", "reply":
sb.WriteString(a.Event)
}
sb.WriteString(`","sub":["`)
sb.WriteString(escapeTextInJson(a.Actor.Name))
sb.WriteString("\",\"")
sb.WriteString(escapeTextInJson(area))
sb.WriteString(`"],"path":"`)
sb.WriteString(escapeTextInJson(url))
sb.WriteString(`","img":"`)
sb.WriteString(escapeTextInJson(a.Actor.Avatar))
sb.WriteString(`","id":`)
sb.WriteString(strconv.Itoa(a.ASID))
sb.WriteRune('}')
return nil
}
//const AlertsGrowHint3 = len(`{"msg":"._","sub":["",""],"path":"","img":"","id":}`) + 3 + 2 + 2 + 2 + 2 + 1
// TODO: Create a notifier structure?
func AddActivityAndNotifyAll(a Alert) error {
id, err := Activity.Add(a)
if err != nil {
return err
}
return NotifyWatchers(id)
}
// TODO: Create a notifier structure?
func AddActivityAndNotifyTarget(a Alert) error {
id, err := Activity.Add(a)
if err != nil {
return err
}
err = ActivityMatches.Add(a.TargetUserID, id)
if err != nil {
return err
}
a.ASID = id
// Live alerts, if the target is online and WebSockets is enabled
if EnableWebsockets {
go func() {
defer EatPanics()
_ = WsHub.pushAlert(a.TargetUserID, a)
//fmt.Println("err:",err)
}()
}
return nil
}
// TODO: Create a notifier structure?
func NotifyWatchers(asid int) error {
_, err := alertStmts.notifyWatchers.Exec(asid)
if err != nil {
return err
}
// Alert the subscribers about this without blocking us from doing something else
if EnableWebsockets {
go func() {
defer EatPanics()
notifyWatchers(asid)
}()
}
return nil
}
func notifyWatchers(asid int) {
rows, e := alertStmts.getWatchers.Query(asid)
if e != nil && e != ErrNoRows {
LogError(e)
return
}
defer rows.Close()
var uid int
var uids []int
for rows.Next() {
if e := rows.Scan(&uid); e != nil {
LogError(e)
return
}
uids = append(uids, uid)
}
if e = rows.Err(); e != nil {
LogError(e)
return
}
alert, e := Activity.Get(asid)
if e != nil && e != ErrNoRows {
LogError(e)
return
}
_ = WsHub.pushAlerts(uids, alert)
}
func DismissAlert(uid, aid int) {
_ = WsHub.PushMessage(uid, `{"event":"dismiss-alert","id":`+strconv.Itoa(aid)+`}`)
}