| 1 | package state |
| 2 | |
| 3 | import ( |
| 4 | "bufio" |
| 5 | "encoding/json" |
| 6 | "errors" |
| 7 | "fmt" |
| 8 | "os" |
| 9 | "path/filepath" |
| 10 | "time" |
| 11 | ) |
| 12 | |
| 13 | const ( |
| 14 | StateFile = "state.json" |
| 15 | EventsFile = "events.jsonl" |
| 16 | ConfigFile = "config.toml" |
| 17 | ) |
| 18 | |
| 19 | type State struct { |
| 20 | ActiveSessionID string `json:"active_session_id,omitempty"` |
| 21 | Sessions map[string]Session `json:"sessions"` |
| 22 | Marks map[string]Mark `json:"marks"` |
| 23 | } |
| 24 | |
| 25 | type Session struct { |
| 26 | ID string `json:"id"` |
| 27 | Name string `json:"name"` |
| 28 | StartedAt time.Time `json:"started_at"` |
| 29 | EndedAt *time.Time `json:"ended_at,omitempty"` |
| 30 | } |
| 31 | |
| 32 | type Mark struct { |
| 33 | Name string `json:"name"` |
| 34 | StartedAt time.Time `json:"started_at"` |
| 35 | } |
| 36 | |
| 37 | type Event struct { |
| 38 | Timestamp time.Time `json:"timestamp"` |
| 39 | Type string `json:"type"` |
| 40 | Fields map[string]any `json:"fields,omitempty"` |
| 41 | } |
| 42 | |
| 43 | type Store struct { |
| 44 | Dir string |
| 45 | } |
| 46 | |
| 47 | func DefaultDir() (string, error) { |
| 48 | if dir := os.Getenv("ATL_HOME"); dir != "" { |
| 49 | return dir, nil |
| 50 | } |
| 51 | home, err := os.UserHomeDir() |
| 52 | if err != nil { |
| 53 | return "", err |
| 54 | } |
| 55 | return filepath.Join(home, ".agent-time-ledger"), nil |
| 56 | } |
| 57 | |
| 58 | func NewStore(dir string) *Store { |
| 59 | return &Store{Dir: dir} |
| 60 | } |
| 61 | |
| 62 | func DefaultStore() (*Store, error) { |
| 63 | dir, err := DefaultDir() |
| 64 | if err != nil { |
| 65 | return nil, err |
| 66 | } |
| 67 | return NewStore(dir), nil |
| 68 | } |
| 69 | |
| 70 | func NewState() State { |
| 71 | return State{ |
| 72 | Sessions: map[string]Session{}, |
| 73 | Marks: map[string]Mark{}, |
| 74 | } |
| 75 | } |
| 76 | |
| 77 | func (s *Store) Ensure() error { |
| 78 | if s.Dir == "" { |
| 79 | return errors.New("store directory is empty") |
| 80 | } |
| 81 | if err := os.MkdirAll(s.Dir, 0o700); err != nil { |
| 82 | return err |
| 83 | } |
| 84 | if _, err := os.Stat(s.statePath()); errors.Is(err, os.ErrNotExist) { |
| 85 | if err := s.Save(NewState()); err != nil { |
| 86 | return err |
| 87 | } |
| 88 | } else if err != nil { |
| 89 | return err |
| 90 | } |
| 91 | if _, err := os.Stat(s.eventsPath()); errors.Is(err, os.ErrNotExist) { |
| 92 | file, err := os.OpenFile(s.eventsPath(), os.O_CREATE|os.O_EXCL|os.O_WRONLY, 0o600) |
| 93 | if err != nil { |
| 94 | return err |
| 95 | } |
| 96 | if err := file.Close(); err != nil { |
| 97 | return err |
| 98 | } |
| 99 | } else if err != nil { |
| 100 | return err |
| 101 | } |
| 102 | if _, err := os.Stat(s.configPath()); errors.Is(err, os.ErrNotExist) { |
| 103 | if err := os.WriteFile(s.configPath(), []byte("# agent-time-ledger local config\n"), 0o600); err != nil { |
| 104 | return err |
| 105 | } |
| 106 | } else if err != nil { |
| 107 | return err |
| 108 | } |
| 109 | return nil |
| 110 | } |
| 111 | |
| 112 | func (s *Store) Load() (State, error) { |
| 113 | if err := s.Ensure(); err != nil { |
| 114 | return State{}, err |
| 115 | } |
| 116 | data, err := os.ReadFile(s.statePath()) |
| 117 | if err != nil { |
| 118 | return State{}, err |
| 119 | } |
| 120 | if len(data) == 0 { |
| 121 | return NewState(), nil |
| 122 | } |
| 123 | |
| 124 | var st State |
| 125 | if err := json.Unmarshal(data, &st); err != nil { |
| 126 | return State{}, err |
| 127 | } |
| 128 | if st.Sessions == nil { |
| 129 | st.Sessions = map[string]Session{} |
| 130 | } |
| 131 | if st.Marks == nil { |
| 132 | st.Marks = map[string]Mark{} |
| 133 | } |
| 134 | return st, nil |
| 135 | } |
| 136 | |
| 137 | func (s *Store) Save(st State) error { |
| 138 | if st.Sessions == nil { |
| 139 | st.Sessions = map[string]Session{} |
| 140 | } |
| 141 | if st.Marks == nil { |
| 142 | st.Marks = map[string]Mark{} |
| 143 | } |
| 144 | if err := os.MkdirAll(s.Dir, 0o700); err != nil { |
| 145 | return err |
| 146 | } |
| 147 | data, err := json.MarshalIndent(st, "", " ") |
| 148 | if err != nil { |
| 149 | return err |
| 150 | } |
| 151 | data = append(data, '\n') |
| 152 | tmp := s.statePath() + ".tmp" |
| 153 | if err := os.WriteFile(tmp, data, 0o600); err != nil { |
| 154 | return err |
| 155 | } |
| 156 | return os.Rename(tmp, s.statePath()) |
| 157 | } |
| 158 | |
| 159 | func (s *Store) AppendEvent(event Event) error { |
| 160 | if err := s.Ensure(); err != nil { |
| 161 | return err |
| 162 | } |
| 163 | file, err := os.OpenFile(s.eventsPath(), os.O_APPEND|os.O_CREATE|os.O_WRONLY, 0o600) |
| 164 | if err != nil { |
| 165 | return err |
| 166 | } |
| 167 | defer file.Close() |
| 168 | |
| 169 | line, err := json.Marshal(event) |
| 170 | if err != nil { |
| 171 | return err |
| 172 | } |
| 173 | if _, err := file.Write(append(line, '\n')); err != nil { |
| 174 | return err |
| 175 | } |
| 176 | return nil |
| 177 | } |
| 178 | |
| 179 | func (s *Store) ReadEvents() ([]Event, error) { |
| 180 | if err := s.Ensure(); err != nil { |
| 181 | return nil, err |
| 182 | } |
| 183 | file, err := os.Open(s.eventsPath()) |
| 184 | if err != nil { |
| 185 | return nil, err |
| 186 | } |
| 187 | defer file.Close() |
| 188 | |
| 189 | var events []Event |
| 190 | scanner := bufio.NewScanner(file) |
| 191 | lineNumber := 0 |
| 192 | for scanner.Scan() { |
| 193 | lineNumber++ |
| 194 | line := scanner.Bytes() |
| 195 | if len(line) == 0 { |
| 196 | continue |
| 197 | } |
| 198 | var event Event |
| 199 | if err := json.Unmarshal(line, &event); err != nil { |
| 200 | return nil, fmt.Errorf("%s:%d: %w", EventsFile, lineNumber, err) |
| 201 | } |
| 202 | events = append(events, event) |
| 203 | } |
| 204 | if err := scanner.Err(); err != nil { |
| 205 | return nil, err |
| 206 | } |
| 207 | return events, nil |
| 208 | } |
| 209 | |
| 210 | func (s *Store) statePath() string { |
| 211 | return filepath.Join(s.Dir, StateFile) |
| 212 | } |
| 213 | |
| 214 | func (s *Store) eventsPath() string { |
| 215 | return filepath.Join(s.Dir, EventsFile) |
| 216 | } |
| 217 | |
| 218 | func (s *Store) configPath() string { |
| 219 | return filepath.Join(s.Dir, ConfigFile) |
| 220 | } |