Stanislav N. aka pztrn
bff1050eab
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130 lines
3.9 KiB
Go
130 lines
3.9 KiB
Go
// OpenSAPS - Open Slack API server for everyone.
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//
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// Copyright (c) 2017, Stanislav N. aka pztrn.
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// All rights reserved.
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//
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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 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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//
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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 General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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package config
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import (
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"errors"
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"io/ioutil"
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"os/user"
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"strings"
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"go.dev.pztrn.name/flagger"
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configstruct "go.dev.pztrn.name/opensaps/config/struct"
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"gopkg.in/yaml.v2"
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)
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type Configuration struct{}
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// Returns configuration to caller.
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func (conf Configuration) GetConfig() *configstruct.ConfigStruct {
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return config
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}
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// Gets value from temporary configuration storage.
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// If value isn't found - returns empty string with error.
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func (conf Configuration) GetTempValue(key string) (string, error) {
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value, found := tempconfig[key]
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if !found {
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// ToDo: fix it!
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// nolint:goerr113
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return "", errors.New("No such key in temporary configuration storage: " + key)
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}
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// If we have path with tilde in front (home directory) - replace
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// tilde with actual home directory.
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if value[0] == '~' {
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usr, err := user.Current()
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if err != nil {
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ctx.Log.Fatal().Err(err).Msg("Failed to get current user data")
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}
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value = strings.Replace(value, "~", usr.HomeDir, 1)
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}
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return value, nil
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}
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func (conf Configuration) Initialize() {
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ctx.Log.Info().Msg("Initializing configuration storage...")
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tempconfig = make(map[string]string)
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flagConfigpath := flagger.Flag{
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Name: "config",
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Description: "Path to configuration file.",
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Type: "string",
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DefaultValue: "~/.config/OpenSAPS/config.yaml",
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}
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_ = ctx.Flagger.AddFlag(&flagConfigpath)
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}
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// Initializes configuration root path for later usage.
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func (conf Configuration) initializeConfigurationFilePath() {
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ctx.Log.Debug().Msg("Asking flagger about configuration root path supplied by user...")
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configpath, err := ctx.Flagger.GetStringValue("config")
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if err != nil {
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ctx.Log.Fatal().Msg("Something went wrong - Flagger doesn't know about \"-config\" parameter!")
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}
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ctx.Log.Info().Msg("Will use configuration file: '" + configpath + "'")
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conf.SetTempValue("CONFIGURATION_FILE", configpath)
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}
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// Asking Flagger about flags, initialize internal variables.
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// Should be called **after** Flagger.Parse().
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func (conf Configuration) InitializeLater() {
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ctx.Log.Info().Msg("Completing configuration initialization...")
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conf.initializeConfigurationFilePath()
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}
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// Loads configuration from file.
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func (conf Configuration) LoadConfigurationFromFile() {
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configpath, err := conf.GetTempValue("CONFIGURATION_FILE")
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if err != nil {
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ctx.Log.Fatal().
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Msg("Failed to get configuration file path from internal temporary configuration storage! OpenSAPS is BROKEN!")
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}
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ctx.Log.Info().Msgf("Loading configuration from '%s'...", configpath)
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// Read file into memory.
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configBytes, err1 := ioutil.ReadFile(configpath)
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if err1 != nil {
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ctx.Log.Fatal().Msgf("Error occurred while reading configuration file: %s", err1.Error())
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}
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// nolint:exhaustruct
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config = &configstruct.ConfigStruct{}
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// Parse YAML.
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err2 := yaml.Unmarshal(configBytes, config)
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if err2 != nil {
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ctx.Log.Fatal().Msgf("Failed to parse configuration file: %s", err2.Error())
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}
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ctx.Log.Debug().Msgf("Loaded configuration: %+v", config)
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}
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// Sets value to key in temporary configuration storage.
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// If key already present in map - value will be replaced.
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func (conf Configuration) SetTempValue(key, value string) {
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tempconfig[key] = value
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}
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