116 lines
3.0 KiB
Go
116 lines
3.0 KiB
Go
/*
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Copyright © 2026 Craig Williams <craig@avsdev.uk>
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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package config
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import (
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"encoding/json"
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"fmt"
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"log/slog"
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"reflect"
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"strings"
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"github.com/spf13/viper"
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"go.yaml.in/yaml/v3"
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)
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const EnvPrefix string = "JOBSEARCH"
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const EtcConfigPath string = "/etc/job-search"
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// Each field's cfg tag must match the section's JSCK* constant.
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type JobSearchConfig struct {
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Logging JobSearchConfigLogging `cfg:"logging"`
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}
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// Default configuration, taken from the default struct tags
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func LoadDefaultConfig() {
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var conf JobSearchConfig
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if err := applyDefaults(&conf); err != nil {
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panic(fmt.Sprintf("config: %v", err))
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}
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LoadToViper(conf)
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}
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func (c JobSearchConfig) Map() map[string]any { return mapOf(c) }
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func (c JobSearchConfig) Flatten() map[string]any { return flattenOf("", c) }
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func (c JobSearchConfig) TypeOf(key string) (reflect.Kind, error) {
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return typeOf(c, key)
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}
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func (c JobSearchConfig) ValueOf(key string) (any, error) {
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return valueOf(c, key)
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}
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func (c *JobSearchConfig) SetValue(key string, value any) error {
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return setValue(c, key, value)
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}
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// Utility method for loading a configuration from Viper
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func LoadFromViper(conf *JobSearchConfig) {
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keys := viper.AllKeys()
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for idx := range keys {
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key := keys[idx]
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keyType, _ := conf.TypeOf(key)
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if keyType == reflect.Invalid {
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continue
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}
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switch keyType {
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case reflect.String:
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conf.SetValue(key, viper.GetString(key))
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case reflect.Int:
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conf.SetValue(key, viper.GetInt(key))
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case reflect.Bool:
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conf.SetValue(key, viper.GetBool(key))
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default:
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slog.Error(fmt.Sprintf("unknown key type: %s", keyType))
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}
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}
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}
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// Utility method for loading a configuration into Viper as defaults
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func LoadToViper(conf JobSearchConfig) {
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flatMap := conf.Flatten()
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for key := range flatMap {
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viper.SetDefault(key, flatMap[key])
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}
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}
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// Converts configuration to a string in flat dotted format
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func (conf JobSearchConfig) String() string {
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var sb strings.Builder
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for k, v := range conf.Flatten() {
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typ, _ := conf.TypeOf(k)
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sb.WriteString(fmt.Sprint(k, " = ", v, " <", typ, ">\n"))
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}
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return sb.String()
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}
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// Converts configuration to JSON
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func (conf JobSearchConfig) JSON() string {
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confMap := conf.Map()
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jbytes, _ := json.MarshalIndent(confMap, "", " ")
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return string(jbytes)
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}
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// Converts configuration to YAML
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func (conf JobSearchConfig) YAML() string {
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confMap := conf.Map()
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ybytes, _ := yaml.Marshal(confMap)
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return string(ybytes)
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}
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