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path: root/xp/member.go
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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 {
	gorm.Model
	DiscordID string `gorm:"not null"`
	XP        uint   `gorm:"default:0"`
	GuildID   string `gorm:"not null"`
}

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()
}

func (c *Copaing) Load() *Copaing {
	gokord.DB.Where("discord_id = ? and guild_id = ?", c.DiscordID, c.GuildID).FirstOrCreate(c)
	return c
}

func (c *Copaing) Save() {
	gokord.DB.Save(c)
}

func (c *Copaing) AddXP(s *discordgo.Session, m *discordgo.Member, xp uint, fn func(uint, uint)) {
	pastLevel := Level(c.XP)
	c.XP += xp
	c.Save()
	newLevel := Level(c.XP)
	if newLevel > pastLevel {
		fn(c.XP, newLevel)
		onNewLevel(s, m, newLevel)
	}
}

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
	}
}

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 last event",
			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
		redisClient, err = gokord.BaseCfg.Redis.Get()
		return redisClient, err
	}
	return redisClient, nil
}

func CloseRedisClient() {
	if redisClient == nil {
		return
	}
	err := redisClient.Close()
	if err != nil {
		utils.SendAlert("xp/member.go - Closing redis client", err.Error())
	}
}