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package main
import (
"errors"
"time"
)
type Database interface {
GetTracking() (*Entry, error)
GetEntries() ([]*Entry, error)
QueryEntry(id *int) ([]*Entry, error)
StartNewEntry(now time.Time, task *Entry) (*Entry, error)
StopEntry(now time.Time) error
SaveEntry(task *Entry) (*Entry, error)
GetTasks() ([]*Task, error)
QueryTask(id *int, group *string, ident *string) ([]*Task, error)
SaveTask(task *Task) (*Task, error)
}
type InMemDb struct {
entries []*Entry
current *Entry
tasks []*Task
}
var (
ErrNotFound = errors.New("Not found")
ErrNotRunning = errors.New("Not running")
)
func NewInMemDb() Database {
return &InMemDb {
entries: []*Entry{},
current: nil,
}
}
func (db *InMemDb) GetTracking() (*Entry, error) {
return db.current, nil
}
func (db *InMemDb) GetEntries() ([]*Entry, error) {
res := make([]*Entry, 0, len(db.entries))
for _, task := range db.entries {
res = append(res, task)
}
return res, nil
}
func (db *InMemDb) QueryEntry(id *int) ([]*Entry, error) {
res := make([]*Entry, 0, 1)
for _, entry := range db.entries {
if id != nil && entry.Id == *id {
res = append(res, entry)
}
}
return res, nil
}
func (db *InMemDb) StartNewEntry(now time.Time, task *Entry) (*Entry, error) {
newTask := &Entry {
Id: len(db.entries),
From: task.From,
To: nil,
Tag: task.Tag,
Comment: task.Comment,
}
if newTask.From == nil {
from := TimeFromStd(now)
newTask.From = &from
}
db.entries = append(db.entries, newTask)
db.StopEntry(now)
db.current = newTask
return newTask, nil
}
func (db *InMemDb) StopEntry(now time.Time) error {
if db.current != nil {
to := TimeFromStd(now)
db.current.To = &to
db.current = nil
} else {
return ErrNotRunning
}
return nil
}
func (db *InMemDb) SaveEntry(task *Entry) (*Entry, error) {
if task.Id < 0 || task.Id >= len(db.entries) {
copyTask := *task
copyTask.Id = len(db.entries)
db.entries = append(db.entries, ©Task)
return ©Task, nil
}
existent := db.entries[task.Id]
existent.Comment = task.Comment
existent.Tag = task.Tag
existent.From = task.From
existent.To = task.To
return existent, nil
}
func (db *InMemDb) GetTasks() ([]*Task, error) {
res := make([]*Task, 0, len(db.tasks))
for _, task := range db.tasks {
res = append(res, task)
}
return res, nil
}
func (db *InMemDb) QueryTask(id *int, group *string, ident *string) ([]*Task, error) {
res := make([]*Task, 0, 1)
for _, task := range db.tasks {
if id != nil && task.Id != *id {
continue
}
if group != nil && task.Group != group {
continue
}
if ident != nil && task.Ident != ident {
continue
}
res = append(res, task)
}
return res, ErrNotFound
}
func (db *InMemDb) SaveTask(task *Task) (*Task, error) {
return nil, nil
}
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