forked from wgroeneveld/go-jamming
118 lines
2.8 KiB
Go
118 lines
2.8 KiB
Go
package common
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import (
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"brainbaking.com/go-jamming/rest"
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"encoding/json"
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"errors"
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"github.com/rs/zerolog/log"
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"io/fs"
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"io/ioutil"
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"strings"
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"time"
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)
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type Config struct {
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Port int `json:"port"`
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Token string `json:"token"`
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UtcOffset int `json:"utcOffset"`
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DataPath string `json:"dataPath"`
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AllowedWebmentionSources []string `json:"allowedWebmentionSources"`
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Blacklist []string `json:"blacklist"`
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}
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func (c *Config) IsBlacklisted(url string) bool {
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if !strings.HasPrefix(url, "http") {
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return false
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}
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domain := rest.Domain(url)
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return Includes(c.Blacklist, domain)
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}
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func (c *Config) Zone() *time.Location {
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return time.FixedZone("local", c.UtcOffset*60)
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}
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func (c *Config) missingKeys() []string {
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keys := []string{}
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if c.Port == 0 {
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keys = append(keys, "port")
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}
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if c.Token == "" {
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keys = append(keys, "token")
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}
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if len(c.AllowedWebmentionSources) == 0 {
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keys = append(keys, "allowedWebmentionSources")
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}
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return keys
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}
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func (c *Config) IsAnAllowedDomain(domain string) bool {
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return Includes(c.AllowedWebmentionSources, domain)
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}
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func (c *Config) FetchDomain(url string) (string, error) {
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for _, domain := range c.AllowedWebmentionSources {
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if strings.Contains(url, domain) {
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return domain, nil
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}
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}
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return "", errors.New("no allowed domain found for url " + url)
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}
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func Configure() *Config {
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c := config()
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for _, domain := range c.AllowedWebmentionSources {
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log.Info().Str("allowedDomain", domain).Msg("Configured")
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}
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return c
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}
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func (c *Config) AddToBlacklist(domain string) {
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for _, d := range c.Blacklist {
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if d == domain {
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return
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}
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}
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c.Blacklist = append(c.Blacklist, domain)
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}
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func (c *Config) Save() {
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bytes, _ := json.Marshal(c) // we assume a correct internral state here
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err := ioutil.WriteFile("config.json", bytes, fs.ModePerm)
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if err != nil {
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log.Err(err).Msg("Unable to save config.json to disk!")
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}
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}
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func config() *Config {
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confData, err := ioutil.ReadFile("config.json")
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if err != nil {
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log.Warn().Msg("No config.json file found, reverting to defaults...")
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return defaultConfig()
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}
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conf := &Config{}
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err = json.Unmarshal(confData, conf)
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if err != nil {
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log.Warn().Msg("config.json malformed JSON, reverting to defaults...")
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return defaultConfig()
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}
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someMissingKeys := conf.missingKeys()
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if len(someMissingKeys) > 0 {
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log.Warn().Str("keys", strings.Join(someMissingKeys, ", ")).Msg("config.json is missing required keys, reverting to defaults...")
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return defaultConfig()
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}
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return conf
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}
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func defaultConfig() *Config {
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return &Config{
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Port: 1337,
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Token: "miauwkes",
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UtcOffset: 60,
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AllowedWebmentionSources: []string{"brainbaking.com", "jefklakscodex.com"},
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Blacklist: []string{"youtube.com"},
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}
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}
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