Merge pull request #1 from anhgelus/feat/xp-reducer

[Feat] Add XP reducer

4 files changed, 273 insertions, 2 deletions

diff --git a/xp/events.go b/xp/events.go
index 3895073..7504c77 100644
--- a/xp/events.go
+++ b/xp/events.go
@@ -31,6 +31,7 @@ func OnMessage(s *discordgo.Session, m *discordgo.MessageCreate) {
 		return
 	}
 	c := GetCopaing(m.Author.ID, m.GuildID)
+	LastEventUpdate(s, c)
 	// add xp
 	trimmed := utils.TrimMessage(strings.ToLower(m.Content))
 	m.Member.User = m.Author
@@ -67,6 +68,7 @@ func OnVoiceUpdate(s *discordgo.Session, e *discordgo.VoiceStateUpdate) {
 	if e.Member.User.Bot {
 		return
 	}
+	LastEventUpdate(s, GetCopaing(e.UserID, e.GuildID))
 	cfg := config.GetGuildConfig(e.GuildID)
 	if cfg.IsDisabled(e.ChannelID) {
 		return
diff --git a/xp/functions.go b/xp/functions.go
index 196c3d3..7ab57f2 100644
--- a/xp/functions.go
+++ b/xp/functions.go
@@ -1,6 +1,9 @@
 package xp
 
-import "math"
+import (
+	"github.com/anhgelus/gokord"
+	"math"
+)
 
 func XPMessage(length uint, diversity uint) uint {
 	return uint(math.Floor(
@@ -27,7 +30,12 @@ func XPForLevel(level uint) uint {
 }
 
 func Lose(time uint, xp uint) uint {
+	if gokord.Debug {
+		return uint(math.Floor(
+			math.Pow(float64(time), 3) * math.Pow(10, -2+math.Log(float64(time))) * math.Floor(float64(xp/500)+1),
+		)) // a little bit faster to lose xp
+	}
 	return uint(math.Floor(
-		math.Pow(float64(time), 2) * math.Pow(10, -2+math.Log(float64(time/85))) * math.Floor(float64(xp/500)),
+		math.Pow(float64(time), 2) * math.Pow(10, -2+math.Log(float64(time/85))) * math.Floor(float64(xp/500)+1),
 	))
 }
diff --git a/xp/level.go b/xp/level.go
index 671bf2e..4830298 100644
--- a/xp/level.go
+++ b/xp/level.go
@@ -5,6 +5,8 @@ import (
 	"github.com/anhgelus/les-copaings-bot/config"
 	"github.com/bwmarrin/discordgo"
 	"slices"
+	"sync"
+	"time"
 )
 
 func onNewLevel(s *discordgo.Session, m *discordgo.Member, level uint) {
@@ -42,3 +44,119 @@ func onNewLevel(s *discordgo.Session, m *discordgo.Member, level uint) {
 		}
 	}
 }
+
+func (c *Copaing) OnNewLevel(s *discordgo.Session, level uint) {
+	m, err := s.GuildMember(c.GuildID, c.DiscordID)
+	if err != nil {
+		utils.SendAlert(
+			"xp/level.go - Getting member for new level",
+			err.Error(),
+			"discord_id",
+			c.DiscordID,
+			"guild_id",
+			c.GuildID,
+		)
+		return
+	}
+	onNewLevel(s, m, level)
+}
+
+func LastEventUpdate(s *discordgo.Session, c *Copaing) {
+	h := c.HourSinceLastEvent()
+	l := Lose(h, c.XP)
+	xp := c.XPAlreadyRemoved()
+	oldXP := c.XP
+	if l-xp < 0 {
+		utils.SendWarn("lose - xp already removed is negative", "lose", l, "xp", xp)
+		c.XP = 0
+	} else {
+		calc := int(c.XP) - int(l) + int(c.XPAlreadyRemoved())
+		if calc < 0 {
+			c.XP = 0
+		} else {
+			c.XP = uint(calc)
+		}
+	}
+	if oldXP != c.XP {
+		lvl := Level(c.XP)
+		if Level(oldXP) != lvl {
+			utils.SendDebug(
+				"Level changed",
+				"old",
+				Level(oldXP),
+				"new",
+				lvl,
+				"discord_id",
+				c.DiscordID,
+				"guild_id",
+				c.GuildID,
+			)
+			c.OnNewLevel(s, lvl)
+		}
+		c.Save()
+	}
+	c.SetLastEvent()
+}
+
+func XPUpdate(s *discordgo.Session, c *Copaing) {
+	oldXP := c.XP
+	if oldXP == 0 {
+		return
+	}
+	h := c.HourSinceLastEvent()
+	l := Lose(h, c.XP)
+	xp := c.XPAlreadyRemoved()
+	if l-xp < 0 {
+		utils.SendWarn("lose - xp_removed is negative", "lose", l, "xp removed", xp)
+		c.AddXPAlreadyRemoved(0)
+	} else {
+		calc := int(c.XP) - int(l) + int(xp)
+		if calc < 0 {
+			c.AddXPAlreadyRemoved(c.XP)
+			c.XP = 0
+		} else {
+			c.XP = uint(calc)
+			c.AddXPAlreadyRemoved(l - xp)
+		}
+	}
+	if oldXP != c.XP {
+		lvl := Level(c.XP)
+		if Level(oldXP) != lvl {
+			utils.SendDebug(
+				"Level updated",
+				"old",
+				Level(oldXP),
+				"new",
+				lvl,
+				"discord_id",
+				c.DiscordID,
+				"guild_id",
+				c.GuildID,
+			)
+			c.OnNewLevel(s, lvl)
+		}
+		utils.SendDebug("Save XP", "old", oldXP, "new", c.XP, "user", c.DiscordID)
+		c.Save()
+	}
+}
+
+func PeriodicReducer(s *discordgo.Session) {
+	var wg sync.WaitGroup
+	for _, g := range s.State.Guilds {
+		for _, m := range utils.FetchGuildUser(s, g.ID) {
+			if m.User.Bot {
+				continue
+			}
+			wg.Add(1)
+			go func() {
+				c := GetCopaing(m.User.ID, g.ID)
+				XPUpdate(s, c)
+				wg.Done()
+			}()
+		}
+		wg.Wait() // finish the entire guild before starting another
+		utils.SendDebug("Periodic reduce, guild finished", "guild", g.Name)
+		time.Sleep(10 * time.Second) // sleep prevents from spamming the Discord API and the database
+	}
+	utils.SendDebug("Periodic reduce finished", "len(guilds)", len(s.State.Guilds))
+}
diff --git a/xp/member.go b/xp/member.go
index 4f1e6ee..bbf013c 100644
--- a/xp/member.go
+++ b/xp/member.go
@@ -1,11 +1,17 @@
 package xp
 
 import (
+	"context"
+	"errors"
+	"fmt"
 	"github.com/anhgelus/gokord"
 	"github.com/anhgelus/gokord/utils"
 	"github.com/bwmarrin/discordgo"
 	"github.com/redis/go-redis/v9"
 	"gorm.io/gorm"
+	"math"
+	"strconv"
+	"time"
 )
 
 type Copaing struct {
@@ -17,6 +23,11 @@ type Copaing struct {
 
 var redisClient *redis.Client
 
+const (
+	LastEvent      = "last_event"
+	AlreadyRemoved = "already_removed"
+)
+
 func GetCopaing(discordID string, guildID string) *Copaing {
 	c := Copaing{DiscordID: discordID, GuildID: guildID}
 	return c.Load()
@@ -42,6 +53,138 @@ func (c *Copaing) AddXP(s *discordgo.Session, m *discordgo.Member, xp uint, fn f
 	}
 }
 
+func (c *Copaing) SetLastEvent() {
+	client, err := getRedisClient()
+	if err != nil {
+		utils.SendAlert("xp/member.go - Getting redis client (set)", err.Error())
+		return
+	}
+	u := c.GetUserBase()
+	t := time.Now().Unix()
+	err = client.Set(context.Background(), fmt.Sprintf(
+		"%s:%s",
+		u.GenKey(),
+		LastEvent,
+	), strconv.FormatInt(t, 10), 0).Err()
+	if err != nil {
+		utils.SendAlert("xp/member.go - Setting last event", err.Error(), "time", t, "base_key", u.GenKey())
+		return
+	}
+	err = client.Set(context.Background(), fmt.Sprintf(
+		"%s:%s",
+		u.GenKey(),
+		AlreadyRemoved,
+	), "0", 0).Err()
+	if err != nil {
+		utils.SendAlert("xp/member.go - Setting already removed to 0", err.Error(), "time", t, "base_key", u.GenKey())
+		return
+	}
+}
+
+func (c *Copaing) HourSinceLastEvent() uint {
+	client, err := getRedisClient()
+	if err != nil {
+		utils.SendAlert("xp/member.go - Getting redis client (get)", err.Error())
+		return 0
+	}
+	u := c.GetUserBase()
+	res := client.Get(context.Background(), fmt.Sprintf("%s:%s", u.GenKey(), LastEvent))
+	if errors.Is(res.Err(), redis.Nil) {
+		return 0
+	} else if res.Err() != nil {
+		utils.SendAlert("xp/member.go - Getting last event", res.Err().Error(), "base_key", u.GenKey())
+		return 0
+	}
+	t := time.Now().Unix()
+	last, err := strconv.Atoi(res.Val())
+	if err != nil {
+		utils.SendAlert(
+			"xp/member.go - Converting time fetched into int (last event)",
+			err.Error(),
+			"base_key",
+			u.GenKey(),
+			"val",
+			res.Val(),
+		)
+		return 0
+	}
+	if gokord.Debug {
+		return uint(math.Floor(float64(t-int64(last)) / 60)) // not hours of unix, is minutes of unix
+	}
+	return utils.HoursOfUnix(t - int64(last))
+}
+
+func (c *Copaing) AddXPAlreadyRemoved(xp uint) uint {
+	client, err := getRedisClient()
+	if err != nil {
+		utils.SendAlert("xp/member.go - Getting redis client (set)", err.Error())
+		return 0
+	}
+	u := c.GetUserBase()
+	exp := xp + c.XPAlreadyRemoved()
+	err = client.Set(context.Background(), fmt.Sprintf(
+		"%s:%s",
+		u.GenKey(),
+		AlreadyRemoved,
+	), exp, 0).Err()
+	if err != nil {
+		utils.SendAlert(
+			"xp/member.go - Setting already removed",
+			err.Error(),
+			"xp already removed",
+			exp,
+			"base_key",
+			u.GenKey(),
+		)
+		return 0
+	}
+	return exp
+}
+
+func (c *Copaing) XPAlreadyRemoved() uint {
+	client, err := getRedisClient()
+	if err != nil {
+		utils.SendAlert("xp/member.go - Getting redis client (xp)", err.Error())
+		return 0
+	}
+	u := c.GetUserBase()
+	res := client.Get(context.Background(), fmt.Sprintf("%s:%s", u.GenKey(), AlreadyRemoved))
+	if errors.Is(res.Err(), redis.Nil) {
+		return 0
+	} else if res.Err() != nil {
+		utils.SendAlert("xp/member.go - Getting already removed", res.Err().Error(), "base_key", u.GenKey())
+		return 0
+	}
+	xp, err := strconv.Atoi(res.Val())
+	if err != nil {
+		utils.SendAlert(
+			"xp/member.go - Converting time fetched into int (already removed)",
+			err.Error(),
+			"base_key",
+			u.GenKey(),
+			"val",
+			res.Val(),
+		)
+		return 0
+	}
+	if xp < 0 {
+		utils.SendAlert(
+			"xp/member.go - Assertion xp >= 0",
+			"xp is negative",
+			"base_key",
+			u.GenKey(),
+			"xp",
+			xp,
+		)
+		return 0
+	}
+	return uint(xp)
+}
+
+func (c *Copaing) GetUserBase() *gokord.UserBase {
+	return &gokord.UserBase{DiscordID: c.DiscordID, GuildID: c.GuildID}
+}
+
 func getRedisClient() (*redis.Client, error) {
 	if redisClient == nil {
 		var err error