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|
package user
import (
"context"
"errors"
"sync"
"time"
"github.com/nyttikord/gokord/state"
)
var ErrSyncingUnsavedData = errors.New("trying to sync unsaved data")
type CopaingCached struct {
ID uint
DiscordID string
GuildID string
XPs uint
XPToAdd uint
lastSync time.Time // time.Time of the lastSync
}
// copaing turns a CopaingCached into a Copaing.
// This operation get the copaing synced with the database.
// It doesn't:
// - save the copaing in the database, use CopaingCached.SaveInDB for that;
// - sync the copaing cached, use CopaingCached.Sync for that.
// TL;DR: don't use this method, unless you know what are you doing.
func (cc *CopaingCached) copaing() *Copaing {
c := &Copaing{DiscordID: cc.DiscordID, GuildID: cc.GuildID}
if err := c.load(); err != nil {
panic(err)
}
return c
}
func (cc *CopaingCached) Sync(ctx context.Context) error {
if cc.mustSave() {
return ErrSyncingUnsavedData
}
synced := FromCopaing(cc.copaing())
synced.XPs += cc.XPToAdd
synced.XPToAdd = cc.XPToAdd
synced.lastSync = time.Now()
err := synced.Save(ctx)
if err != nil {
return err
}
*cc = *synced
return nil
}
func (cc *CopaingCached) Save(ctx context.Context) error {
state := GetState(ctx)
state.mu.Lock()
defer state.mu.Unlock()
return state.storage.Write(KeyCopaingCachedRaw(cc.GuildID, cc.DiscordID), *cc)
}
func (cc *CopaingCached) SaveInDB(ctx context.Context) error {
c := cc.copaing()
c.CopaingXPs = append(c.CopaingXPs, CopaingXP{CopaingID: c.ID, XP: cc.XPToAdd, GuildID: c.GuildID})
err := c.Save()
if err != nil {
return err
}
cc.XPToAdd = 0
return cc.Save(ctx)
}
func (cc *CopaingCached) Delete(ctx context.Context) error {
c := cc.copaing()
err := c.Delete()
if err != nil {
return err
}
state := GetState(ctx)
state.mu.Lock()
defer state.mu.Unlock()
return state.storage.Delete(KeyCopaingCached(c))
}
func (cc *CopaingCached) mustSave() bool {
return cc.XPToAdd > 0
}
func saveStateInDB(ctx context.Context) error {
for _, v := range GetState(ctx).storage {
if v.mustSave() {
err := v.SaveInDB(ctx)
if err != nil {
return err
}
}
}
return nil
}
func FromCopaing(c *Copaing) *CopaingCached {
return &CopaingCached{
ID: c.ID,
DiscordID: c.DiscordID,
GuildID: c.GuildID,
XPs: calcXP(c),
XPToAdd: 0,
}
}
const KeyCopaingCachedPrefix = "cc:"
func KeyCopaingCached(c *Copaing) state.Key {
return KeyCopaingCachedRaw(c.GuildID, c.DiscordID)
}
func KeyCopaingCachedRaw(guildID, copaingID string) state.Key {
return KeyCopaingCachedPrefix + state.Key(guildID+":"+copaingID)
}
type State struct {
mu sync.RWMutex
storage state.MapStorage[CopaingCached]
}
func NewState() *State {
return &State{
storage: state.MapStorage[CopaingCached]{},
}
}
const ContextKeyState = "state"
func GetState(ctx context.Context) *State {
return ctx.Value(ContextKeyState).(*State)
}
func SetState(ctx context.Context, state *State) context.Context {
return context.WithValue(ctx, ContextKeyState, state)
}
func (s *State) Copaing(guildID, copaingID string) (*CopaingCached, error) {
s.mu.RLock()
defer s.mu.RUnlock()
raw, err := s.storage.Get(KeyCopaingCachedRaw(guildID, copaingID))
if err != nil {
return nil, err
}
c := raw.(CopaingCached)
return &c, nil
}
func (s *State) Copaings(guild string) []CopaingCached {
s.mu.RLock()
defer s.mu.RUnlock()
var ccs []CopaingCached
for _, cc := range s.storage {
if cc.GuildID == guild {
ccs = append(ccs, cc)
}
}
return ccs
}
func calcXP(c *Copaing) uint {
var sum uint
for _, entry := range c.CopaingXPs {
sum += entry.XP
}
return sum
}
|
