viye/internal/config/config.go (view raw)
| 1 | package config |
| 2 | |
| 3 | import ( |
| 4 | "bytes" |
| 5 | "errors" |
| 6 | "maps" |
| 7 | "os" |
| 8 | "path/filepath" |
| 9 | "slices" |
| 10 | "strings" |
| 11 | |
| 12 | _ "embed" |
| 13 | ) |
| 14 | |
| 15 | var ( |
| 16 | ErrConfigFileNotFound = errors.New("config file not found") |
| 17 | ErrInvalidConfig = errors.New("config file is invalid") |
| 18 | ) |
| 19 | |
| 20 | //go:embed default.conf |
| 21 | var defaultConfig []byte |
| 22 | |
| 23 | type Config struct { |
| 24 | cfgPath string |
| 25 | cfg map[string]string |
| 26 | } |
| 27 | |
| 28 | func Load() (*Config, error) { |
| 29 | cfgDir, err := os.UserConfigDir() |
| 30 | if err != nil { |
| 31 | return nil, err |
| 32 | } |
| 33 | |
| 34 | cfgPath := filepath.Join(cfgDir, "viye.conf") |
| 35 | c := Config{cfgPath: cfgPath} |
| 36 | |
| 37 | // write default config |
| 38 | if _, serr := os.Stat(cfgPath); serr != nil { |
| 39 | if !os.IsNotExist(serr) { |
| 40 | return nil, serr |
| 41 | } |
| 42 | if cerr := os.WriteFile(cfgPath, defaultConfig, 0o644); cerr != nil { |
| 43 | return nil, cerr |
| 44 | } |
| 45 | c.cfg = make(map[string]string) |
| 46 | if cerr := c.read(defaultConfig); cerr != nil { |
| 47 | return nil, cerr |
| 48 | } |
| 49 | return &c, nil |
| 50 | } |
| 51 | |
| 52 | file, err := os.ReadFile(cfgPath) |
| 53 | if err != nil { |
| 54 | return nil, err |
| 55 | } |
| 56 | |
| 57 | c.cfg = make(map[string]string) |
| 58 | if err := c.read(file); err != nil { |
| 59 | return nil, err |
| 60 | } |
| 61 | |
| 62 | return &c, nil |
| 63 | } |
| 64 | |
| 65 | func (c *Config) GetAll() map[string]string { return c.cfg } |
| 66 | func (c *Config) Get(key string) (val string, ok bool) { |
| 67 | val, ok = c.cfg[key] |
| 68 | return val, ok |
| 69 | } |
| 70 | |
| 71 | func (c *Config) Set(key, value string) error { |
| 72 | c.cfg[key] = value |
| 73 | return c.save() |
| 74 | } |
| 75 | |
| 76 | func (c *Config) Delete(key string) error { |
| 77 | delete(c.cfg, key) |
| 78 | return c.save() |
| 79 | } |
| 80 | |
| 81 | func (c *Config) read(inp []byte) error { |
| 82 | for line := range strings.SplitSeq(string(inp), "\n") { |
| 83 | if line == "" || strings.HasPrefix(line, "#") { |
| 84 | continue |
| 85 | } |
| 86 | parts := strings.Split(line, " = ") |
| 87 | if len(parts) < 2 || len(parts) > 2 { |
| 88 | return ErrInvalidConfig // TODO: improve error reporting |
| 89 | } |
| 90 | key := strings.TrimSpace(parts[0]) |
| 91 | if strings.Contains(key, " ") { |
| 92 | return ErrInvalidConfig |
| 93 | } |
| 94 | c.cfg[key] = strings.TrimSpace(parts[1]) |
| 95 | } |
| 96 | return nil |
| 97 | } |
| 98 | |
| 99 | func (c *Config) save() error { |
| 100 | var buf bytes.Buffer |
| 101 | for _, key := range slices.Sorted(maps.Keys(c.cfg)) { |
| 102 | val := c.cfg[key] |
| 103 | _, _ = buf.WriteString(key) |
| 104 | _, _ = buf.WriteString(" = ") |
| 105 | _, _ = buf.WriteString(val) |
| 106 | _ = buf.WriteByte('\n') |
| 107 | } |
| 108 | err := os.WriteFile(c.cfgPath, buf.Bytes(), 0o644) |
| 109 | return err |
| 110 | } |