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cron.go
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cron.go
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package cron
import (
"context"
"crypto/sha1"
"errors"
"fmt"
"github.com/flowline-io/flowbot/internal/store"
"github.com/flowline-io/flowbot/internal/types"
"github.com/flowline-io/flowbot/pkg/cache"
"github.com/flowline-io/flowbot/pkg/flog"
"github.com/influxdata/cron"
"gorm.io/gorm"
"time"
)
type Rule struct {
Name string
Help string
When string
Action func(types.Context) []types.MsgPayload
}
type Ruleset struct {
stop chan struct{}
Type string
outCh chan result
cronRules []Rule
Send types.SendFunc
}
type result struct {
name string
ctx types.Context
payload types.MsgPayload
}
// NewCronRuleset New returns a cron rule set
func NewCronRuleset(name string, rules []Rule) *Ruleset {
return &Ruleset{
stop: make(chan struct{}),
Type: name,
outCh: make(chan result, 100),
cronRules: rules,
}
}
func (r *Ruleset) Daemon() {
// process cron
for rule := range r.cronRules {
flog.Info("cron %s start", r.cronRules[rule].Name)
go r.ruleWorker(r.cronRules[rule])
}
// result pipeline
go r.resultWorker()
}
func (r *Ruleset) Shutdown() {
r.stop <- struct{}{}
}
func (r *Ruleset) ruleWorker(rule Rule) {
p, err := cron.ParseUTC(rule.When)
if err != nil {
flog.Error(err)
return
}
nextTime, err := p.Next(time.Now())
if err != nil {
flog.Error(err)
return
}
ticker := time.NewTicker(time.Second)
for {
select {
case <-r.stop:
flog.Info("cron %s rule worker stopped", rule.Name)
return
case <-ticker.C:
if nextTime.Format("2006-01-02 15:04") != time.Now().Format("2006-01-02 15:04") {
continue
}
msgs := func() []result {
defer func() {
if rc := recover(); rc != nil {
flog.Warn("cron %s ruleWorker recover", rule.Name)
if v, ok := rc.(error); ok {
flog.Error(v)
}
}
}()
// bot user
// botUid, _, _, _, _ := serverStore.Users.GetAuthUniqueRecord("basic", fmt.Sprintf("%s_bot", r.Type))
// all normal users
users, err := store.Database.GetUsers()
if err != nil {
flog.Error(err)
return nil
}
var res []result
for _, user := range users {
// check subscription
//uid := types.EncodeUid(int64(user.ID))
//topic := uid.P2PName(botUid)
uid := types.Uid(user.Flag)
topic := "" // fixme
// get oauth token
oauth, err := store.Database.OAuthGet(uid, topic, r.Type)
if err != nil && !errors.Is(err, gorm.ErrRecordNotFound) {
continue
}
// ctx
ctx := types.Context{
Original: topic,
AsUser: uid,
Token: oauth.Token,
RcptTo: topic,
}
// run action
ra := rule.Action(ctx)
for i := range ra {
res = append(res, result{
name: rule.Name,
ctx: ctx,
payload: ra[i],
})
}
}
return res
}()
if len(msgs) > 0 {
for _, item := range msgs {
r.outCh <- item
}
}
nextTime, err = p.Next(time.Now())
if err != nil {
flog.Error(err)
}
}
}
}
func (r *Ruleset) resultWorker() {
for {
select {
case <-r.stop:
flog.Info("cron %s result worker stopped", r.Type)
return
case out := <-r.outCh:
// filter
res := r.filter(out)
// pipeline
r.pipeline(res)
}
}
}
func (r *Ruleset) filter(res result) result {
// user auth record
filterKey := fmt.Sprintf("cron:%s:%s:filter", res.name, res.ctx.AsUser)
// content hash
d := un(res.payload)
s := sha1.New()
_, _ = s.Write(d)
hash := s.Sum(nil)
ctx := context.Background()
state := cache.DB.SIsMember(ctx, filterKey, hash).Val()
if state {
return result{}
}
_ = cache.DB.SAdd(ctx, filterKey, hash)
return res
}
func (r *Ruleset) pipeline(res result) {
if res.payload == nil {
return
}
r.Send(res.ctx.RcptTo, types.Uid(res.ctx.Original), res.payload)
}
func un(payload types.MsgPayload) []byte {
switch v := payload.(type) {
case types.TextMsg:
return []byte(v.Text)
case types.InfoMsg:
return []byte(v.Title)
case types.RepoMsg:
return []byte(*v.FullName)
case types.LinkMsg:
return []byte(v.Url)
}
return nil
}