62 lines
1.4 KiB
Go
62 lines
1.4 KiB
Go
package configuration
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import (
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"encoding/json"
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"errors"
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"fmt"
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"os"
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"path/filepath"
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"strings"
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)
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var errCfg = errors.New("configuration")
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// Config is a configuration controlling structure.
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type Config struct {
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RSS *RSS `json:"rss"`
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Outputs *Outputs `json:"outputs"`
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}
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// New creates new configuration controller.
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func New(path string) (*Config, error) {
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cfg := &Config{}
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// Get configuration file real path.
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userHomeDir, err := os.UserHomeDir()
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if err != nil {
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return nil, fmt.Errorf("%w: parse configuration file: get real path: get user home dir: %w", errCfg, err)
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}
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path = strings.Replace(path, "~", userHomeDir, 1)
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absPath, err := filepath.Abs(path)
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if err != nil {
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return nil, fmt.Errorf("%w: parse configuration file: get real path: get absolute path: %w", errCfg, err)
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}
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cfgFileData, err := os.ReadFile(absPath)
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if err != nil {
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return nil, fmt.Errorf("%w: parse configuration file: read file: %w", errCfg, err)
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}
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if err := json.Unmarshal(cfgFileData, cfg); err != nil {
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return nil, fmt.Errorf("%w: parse configuration file: %w", errCfg, err)
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}
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// Validate configuration.
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if err := cfg.Validate(); err != nil {
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return nil, fmt.Errorf("%w: %w", errCfg, err)
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}
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return cfg, nil
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}
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// Validate validates app configuration.
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func (c *Config) Validate() error {
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if err := c.RSS.Validate(); err != nil {
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return fmt.Errorf("validate configuration: %w", err)
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}
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return nil
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}
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