91 lines
1.7 KiB
Go
91 lines
1.7 KiB
Go
package main
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import (
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"net/url"
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"os"
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"github.com/pelletier/go-toml/v2"
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"go.arsenm.dev/logger/log"
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"go.arsenm.dev/pcre"
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)
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type Config struct {
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Lemmy struct {
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InstanceURL string `toml:"instanceURL"`
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Account struct {
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UserOrEmail string `toml:"userOrEmail"`
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Password string `toml:"password"`
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} `toml:"account"`
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} `toml:"lemmy"`
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Replies []Reply `toml:"reply"`
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}
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type Reply struct {
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Regex string `toml:"regex"`
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Msg string `toml:"msg"`
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}
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var (
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cfg = Config{}
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compiledRegexes = map[string]*pcre.Regexp{}
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)
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func loadConfig(path string) error {
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fi, err := os.Stat(path)
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if err != nil {
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return err
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}
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if fi.Mode().Perm() != 0o600 {
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log.Fatal("Your config file's permissions are insecure. Please use chmod to set them to 600. Refusing to start.").Send()
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}
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fl, err := os.Open(path)
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if err != nil {
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return err
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}
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err = toml.NewDecoder(fl).Decode(&cfg)
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if err != nil {
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return err
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}
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err = compileRegexes(cfg.Replies)
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if err != nil {
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return err
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}
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validateConfig()
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return nil
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}
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func compileRegexes(replies []Reply) error {
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for _, reply := range replies {
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if _, ok := compiledRegexes[reply.Regex]; ok {
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continue
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}
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re, err := pcre.Compile(reply.Regex)
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if err != nil {
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return err
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}
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compiledRegexes[reply.Regex] = re
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}
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return nil
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}
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func validateConfig() {
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_, err := url.Parse(cfg.Lemmy.InstanceURL)
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if err != nil {
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log.Fatal("Lemmy instance URL is not valid").Err(err).Send()
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}
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for i, reply := range cfg.Replies {
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re := compiledRegexes[reply.Regex]
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if re.MatchString(reply.Msg) {
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log.Fatal("Regular expression matches message. This may create an infinite loop. Refusing to start.").Int("reply-index", i).Send()
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}
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}
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}
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