mirror of
https://github.com/Luzifer/twitch-bot.git
synced 2024-11-08 16:20:02 +00:00
208 lines
4.7 KiB
Go
208 lines
4.7 KiB
Go
package main
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import (
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"fmt"
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"io"
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"os"
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"path"
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"time"
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"github.com/go-irc/irc"
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"github.com/pkg/errors"
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log "github.com/sirupsen/logrus"
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"gopkg.in/yaml.v2"
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)
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type configFile struct {
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AutoMessages []*autoMessage `yaml:"auto_messages"`
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Channels []string `yaml:"channels"`
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PermitAllowModerator bool `yaml:"permit_allow_moderator"`
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PermitTimeout time.Duration `yaml:"permit_timeout"`
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RawLog string `yaml:"raw_log"`
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Rules []*Rule `yaml:"rules"`
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Variables map[string]interface{} `yaml:"variables"`
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rawLogWriter io.WriteCloser
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}
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func newConfigFile() *configFile {
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return &configFile{
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PermitTimeout: time.Minute,
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}
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}
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func loadConfig(filename string) error {
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var (
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err error
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tmpConfig *configFile
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)
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switch path.Ext(filename) {
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case ".yaml", ".yml":
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tmpConfig, err = parseConfigFromYAML(filename)
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default:
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return errors.Errorf("Unknown config format %q", path.Ext(filename))
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}
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if err != nil {
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return errors.Wrap(err, "parsing config")
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}
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if len(tmpConfig.Channels) == 0 {
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log.Warn("Loaded config with empty channel list")
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}
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if len(tmpConfig.Rules) == 0 {
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log.Warn("Loaded config with empty ruleset")
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}
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configLock.Lock()
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defer configLock.Unlock()
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tmpConfig.updateAutoMessagesFromConfig(config)
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tmpConfig.fixDurations()
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switch {
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case config != nil && config.RawLog == tmpConfig.RawLog:
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tmpConfig.rawLogWriter = config.rawLogWriter
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case tmpConfig.RawLog == "":
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if err = config.CloseRawMessageWriter(); err != nil {
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return errors.Wrap(err, "closing old raw log writer")
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}
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tmpConfig.rawLogWriter = writeNoOpCloser{io.Discard}
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default:
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if err = config.CloseRawMessageWriter(); err != nil {
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return errors.Wrap(err, "closing old raw log writer")
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}
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if err = os.MkdirAll(path.Dir(tmpConfig.RawLog), 0o755); err != nil {
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return errors.Wrap(err, "creating directories for raw log")
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}
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if tmpConfig.rawLogWriter, err = os.OpenFile(tmpConfig.RawLog, os.O_APPEND|os.O_CREATE|os.O_WRONLY, 0o644); err != nil {
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return errors.Wrap(err, "opening raw log for appending")
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}
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}
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config = tmpConfig
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log.WithFields(log.Fields{
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"auto_messages": len(config.AutoMessages),
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"rules": len(config.Rules),
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"channels": len(config.Channels),
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}).Info("Config file (re)loaded")
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return nil
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}
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func parseConfigFromYAML(filename string) (*configFile, error) {
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f, err := os.Open(filename)
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if err != nil {
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return nil, errors.Wrap(err, "open config file")
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}
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defer f.Close()
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var (
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decoder = yaml.NewDecoder(f)
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tmpConfig = newConfigFile()
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)
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decoder.SetStrict(true)
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if err = decoder.Decode(&tmpConfig); err != nil {
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return nil, errors.Wrap(err, "decode config file")
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}
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return tmpConfig, nil
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}
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func (c *configFile) CloseRawMessageWriter() error {
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if c == nil || c.rawLogWriter == nil {
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return nil
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}
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return c.rawLogWriter.Close()
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}
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func (c configFile) GetMatchingRules(m *irc.Message, event *string) []*Rule {
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configLock.RLock()
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defer configLock.RUnlock()
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var out []*Rule
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for _, r := range c.Rules {
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if r.matches(m, event) {
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out = append(out, r)
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}
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}
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return out
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}
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func (c configFile) LogRawMessage(m *irc.Message) error {
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_, err := fmt.Fprintln(c.rawLogWriter, m.String())
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return errors.Wrap(err, "writing raw log message")
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}
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func (c *configFile) fixDurations() {
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// General fields
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c.PermitTimeout = c.fixedDuration(c.PermitTimeout)
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// Fix rules
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for _, r := range c.Rules {
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r.Cooldown = c.fixedDurationPtr(r.Cooldown)
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}
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// Fix auto-messages
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for _, a := range c.AutoMessages {
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a.TimeInterval = c.fixedDuration(a.TimeInterval)
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}
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}
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func (configFile) fixedDuration(d time.Duration) time.Duration {
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if d > time.Second {
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return d
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}
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return d * time.Second
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}
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func (configFile) fixedDurationPtr(d *time.Duration) *time.Duration {
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if d == nil || *d > time.Second {
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return d
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}
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fd := *d * time.Second
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return &fd
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}
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func (c *configFile) updateAutoMessagesFromConfig(old *configFile) {
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for idx, nam := range c.AutoMessages {
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// By default assume last message to be sent now
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// in order not to spam messages at startup
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nam.lastMessageSent = time.Now()
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if !nam.IsValid() {
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log.WithField("index", idx).Warn("Auto-Message configuration is invalid and therefore disabled")
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}
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if old == nil {
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// Initial config load, do not update timers
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continue
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}
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for _, oam := range old.AutoMessages {
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if nam.ID() != oam.ID() {
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continue
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}
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// We disable the old message as executing it would
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// mess up the constraints of the new message
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oam.lock.Lock()
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oam.disabled = true
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nam.lastMessageSent = oam.lastMessageSent
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nam.linesSinceLastMessage = oam.linesSinceLastMessage
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oam.lock.Unlock()
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}
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}
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}
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