lure-updater/internal/builtins/run_every.go

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2023-06-09 17:54:15 +00:00
/*
* LURE Updater - Automated updater bot for LURE packages
* Copyright (C) 2023 Elara Musayelyan
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
2023-06-09 17:48:46 +00:00
package builtins
import (
"sync"
"time"
"go.elara.ws/logger/log"
"go.starlark.net/starlark"
"go.starlark.net/starlarkstruct"
)
var (
tickerMtx = &sync.Mutex{}
tickerCount = 0
tickers = map[int]*time.Ticker{}
)
func runEvery(thread *starlark.Thread, b *starlark.Builtin, args starlark.Tuple, kwargs []starlark.Tuple) (starlark.Value, error) {
var every string
var fn *starlark.Function
err := starlark.UnpackArgs("run_every", args, kwargs, "every", &every, "function", &fn)
if err != nil {
return nil, err
}
d, err := time.ParseDuration(every)
if err != nil {
return nil, err
}
tickerMtx.Lock()
t := time.NewTicker(d)
handle := tickerCount
tickers[handle] = t
tickerCount++
tickerMtx.Unlock()
log.Debug("Created new ticker").Int("handle", handle).Str("duration", every).Stringer("pos", thread.CallFrame(1).Pos).Send()
go func() {
for range t.C {
log.Debug("Calling scheduled function").Str("name", fn.Name()).Stringer("pos", fn.Position()).Send()
_, err := starlark.Call(thread, fn, nil, nil)
if err != nil {
log.Warn("Error while executing scheduled function").Str("name", fn.Name()).Stringer("pos", fn.Position()).Err(err).Send()
}
}
}()
return newTickerHandle(handle), nil
}
func sleep(thread *starlark.Thread, b *starlark.Builtin, args starlark.Tuple, kwargs []starlark.Tuple) (starlark.Value, error) {
var duration string
err := starlark.UnpackArgs("sleep", args, kwargs, "duration", &duration)
if err != nil {
return nil, err
}
d, err := time.ParseDuration(duration)
if err != nil {
return nil, err
}
log.Debug("Sleeping").Str("duration", duration).Stringer("pos", thread.CallFrame(1).Pos).Send()
time.Sleep(d)
return starlark.None, nil
}
func stopTicker(handle int) *starlark.Builtin {
return starlark.NewBuiltin("stop", func(thread *starlark.Thread, b *starlark.Builtin, args starlark.Tuple, kwargs []starlark.Tuple) (starlark.Value, error) {
tickerMtx.Lock()
tickers[handle].Stop()
delete(tickers, handle)
tickerMtx.Unlock()
log.Debug("Stopped ticker").Int("handle", handle).Stringer("pos", thread.CallFrame(1).Pos).Send()
return starlark.None, nil
})
}
func newTickerHandle(handle int) starlark.Value {
return starlarkstruct.FromStringDict(starlarkstruct.Default, starlark.StringDict{
"stop": stopTicker(handle),
})
}