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package worktime
import (
"encoding/json"
"errors"
"fmt"
"os"
"path/filepath"
"sort"
"strings"
)
const dbFilePattern = "db.*.json"
// Entry is a single worktime event in a host database.
type Entry struct {
Action string `json:"action"`
What string `json:"what"`
Epoch int64 `json:"epoch"`
Source string `json:"source"`
Human string `json:"human"`
Value int64 `json:"value,omitempty"`
Descr string `json:"descr,omitempty"`
}
// Database is the on-disk JSON structure used by worktime.
type Database struct {
Entries map[string][]Entry `json:"entries"`
}
// LoadAll reads all db.*.json files from dbDir, merges entries, and sorts by epoch.
func LoadAll(dbDir string) ([]Entry, error) {
if strings.TrimSpace(dbDir) == "" {
return nil, errors.New("db directory must not be empty")
}
dbFiles, err := filepath.Glob(filepath.Join(dbDir, dbFilePattern))
if err != nil {
return nil, fmt.Errorf("glob databases in %q: %w", dbDir, err)
}
entries := make([]Entry, 0)
for _, dbFile := range dbFiles {
db, err := loadDatabaseFile(dbFile)
if err != nil {
return nil, err
}
for _, hostEntries := range db.Entries {
entries = append(entries, hostEntries...)
}
}
sortEntries(entries)
return entries, nil
}
// LoadHost reads one host database from dbDir. Missing files return an empty host section.
func LoadHost(dbDir, hostname string) (Database, error) {
host, err := normalizeHostname(hostname)
if err != nil {
return Database{}, err
}
if strings.TrimSpace(dbDir) == "" {
return Database{}, errors.New("db directory must not be empty")
}
dbFile := filepath.Join(dbDir, dbFileName(host))
db, err := loadDatabaseFile(dbFile)
if err != nil {
if os.IsNotExist(err) {
return newHostDatabase(host), nil
}
return Database{}, err
}
if _, ok := db.Entries[host]; !ok {
db.Entries[host] = []Entry{}
}
sortEntries(db.Entries[host])
return db, nil
}
// SaveHost writes one host database to dbDir as db.<hostname>.json.
func SaveHost(dbDir, hostname string, db Database) error {
host, err := normalizeHostname(hostname)
if err != nil {
return err
}
if strings.TrimSpace(dbDir) == "" {
return errors.New("db directory must not be empty")
}
if db.Entries == nil {
db.Entries = map[string][]Entry{}
}
if _, ok := db.Entries[host]; !ok {
db.Entries[host] = []Entry{}
}
sortEntries(db.Entries[host])
data, err := json.MarshalIndent(db, "", " ")
if err != nil {
return fmt.Errorf("encode database for host %q: %w", host, err)
}
data = append(data, '\n')
if err := os.MkdirAll(dbDir, 0o755); err != nil {
return fmt.Errorf("create db directory %q: %w", dbDir, err)
}
dbFile := filepath.Join(dbDir, dbFileName(host))
if err := os.WriteFile(dbFile, data, 0o644); err != nil {
return fmt.Errorf("write db file %q: %w", dbFile, err)
}
return nil
}
func loadDatabaseFile(dbFile string) (Database, error) {
var db Database
data, err := os.ReadFile(dbFile)
if err != nil {
return db, err
}
if err := json.Unmarshal(data, &db); err != nil {
return db, fmt.Errorf("parse db file %q: %w", dbFile, err)
}
if db.Entries == nil {
db.Entries = map[string][]Entry{}
}
return db, nil
}
func sortEntries(entries []Entry) {
sort.SliceStable(entries, func(i, j int) bool {
if entries[i].Epoch != entries[j].Epoch {
return entries[i].Epoch < entries[j].Epoch
}
if entries[i].Source != entries[j].Source {
return entries[i].Source < entries[j].Source
}
return entries[i].Action < entries[j].Action
})
}
func normalizeHostname(hostname string) (string, error) {
host := strings.TrimSpace(hostname)
if host == "" {
return "", errors.New("hostname must not be empty")
}
return host, nil
}
func dbFileName(hostname string) string {
return "db." + hostname + ".json"
}
func newHostDatabase(hostname string) Database {
return Database{
Entries: map[string][]Entry{
hostname: {},
},
}
}
|
