mirror of
https://github.com/Theodor-Springmann-Stiftung/musenalm.git
synced 2025-10-30 01:35:32 +00:00
102 lines
2.0 KiB
Go
102 lines
2.0 KiB
Go
package app
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import (
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"encoding/json"
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"fmt"
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"github.com/Theodor-Springmann-Stiftung/musenalm/helpers"
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"github.com/kelseyhightower/envconfig"
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"log/slog"
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"os"
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)
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// WARNING: this is not intended to be used in a multi-threaded environment
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// Instatiate this once on startup before any goroutines are started
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const (
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DEFAULT_PORT = "8080"
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DEFAULT_ADDR = "localhost"
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DEFAULT_HTTPS = false
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ENV_PREFIX = "MUSENALM"
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)
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type ConfigProvider struct {
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Files []string
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DevFiles []string
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*Config
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}
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type Config struct {
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// At least one of these should be set
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Debug bool `json:"debug,omitempty" envconfig:"DEBUG"`
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AllowTestLogin bool `json:"allow_test_login,omitempty" envconfig:"ALLOW_TEST_LOGIN"`
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}
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func NewConfigProvider(files []string, devfiles []string) *ConfigProvider {
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return &ConfigProvider{Files: files, DevFiles: devfiles}
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}
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func (c *ConfigProvider) Read() error {
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c.Config = &Config{}
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for _, file := range c.Files {
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conf, err := readSettingsFile(file)
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if err == nil {
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c.Config = conf
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} else {
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panic(err)
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}
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}
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for _, file := range c.DevFiles {
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conf, err := readSettingsFile(file)
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if c.Debug {
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if err == nil {
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c.Config = conf
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} else {
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panic(err)
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}
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}
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}
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c.Config = readSettingsEnv(c.Config)
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c.Config = readDefaults(c.Config)
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return nil
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}
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func (c *ConfigProvider) Validate() error {
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return nil
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}
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func readSettingsFile(path string) (*Config, error) {
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cfg := &Config{}
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f, err := os.Open(path)
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if err != nil {
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slog.Error("Error opening config file ", "path", path, "error", err)
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return cfg, err
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}
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defer f.Close()
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dec := json.NewDecoder(f)
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err = dec.Decode(cfg)
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helpers.Assert(err, "Error decoding config file")
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return cfg, nil
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}
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func readSettingsEnv(cfg *Config) *Config {
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_ = envconfig.Process(ENV_PREFIX, cfg)
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return cfg
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}
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func readDefaults(cfg *Config) *Config {
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return cfg
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}
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// Implement stringer
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func (c *Config) String() string {
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json, err := json.MarshalIndent(c, "", " ")
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if err != nil {
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return fmt.Sprintf("Error marshalling config: %v", err)
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}
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return string(json)
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}
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