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client.go
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client.go
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package botrest
import (
"bytes"
"encoding/json"
"fmt"
"github.com/jonas747/discordgo"
"github.com/jonas747/yagpdb/bot"
"github.com/jonas747/yagpdb/common"
"github.com/mediocregopher/radix"
"github.com/pkg/errors"
"github.com/sirupsen/logrus"
"net/http"
"net/url"
"strconv"
"sync"
"time"
)
var (
ErrServerError = errors.New("botrest server is having issues")
ErrCantFindServer = errors.New("can't find botrest server for provided shard")
)
func GetServerAddrForGuild(guildID int64) string {
shard := bot.GuildShardID(guildID)
return GetServerAddrForShard(shard)
}
func GetServerAddrForShard(shard int) string {
resp := ""
err := common.RedisPool.Do(radix.Cmd(&resp, "GET", RedisKeyShardAddressMapping(shard)))
if err != nil {
logrus.WithError(err).Error("[botrest] failed retrieving shard server addr")
}
return resp
}
func Get(shard int, url string, dest interface{}) error {
serverAddr := GetServerAddrForShard(shard)
if serverAddr == "" {
return ErrCantFindServer
}
return GetWithAddress(serverAddr, url, dest)
}
func GetWithAddress(addr string, url string, dest interface{}) error {
resp, err := http.Get("http://" + addr + "/" + url)
if err != nil {
return err
}
defer resp.Body.Close()
if resp.StatusCode != 200 {
var errDest string
err := json.NewDecoder(resp.Body).Decode(&errDest)
if err != nil {
return ErrServerError
}
return errors.New(errDest)
}
return errors.WithMessage(json.NewDecoder(resp.Body).Decode(dest), "json.Decode")
}
func Post(shard int, url string, bodyData interface{}, dest interface{}) error {
serverAddr := GetServerAddrForShard(shard)
if serverAddr == "" {
return ErrCantFindServer
}
var bodyBuf bytes.Buffer
if bodyData != nil {
encoder := json.NewEncoder(&bodyBuf)
err := encoder.Encode(bodyData)
if err != nil {
return err
}
}
resp, err := http.Post("http://"+serverAddr+"/"+url, "application/json", &bodyBuf)
if err != nil {
return err
}
defer resp.Body.Close()
if resp.StatusCode != 200 {
var errDest string
err := json.NewDecoder(resp.Body).Decode(&errDest)
if err != nil {
return ErrServerError
}
return errors.New(errDest)
}
if dest == nil {
return nil
}
return errors.WithMessage(json.NewDecoder(resp.Body).Decode(dest), "json.Decode")
}
func GetGuild(guildID int64) (g *discordgo.Guild, err error) {
err = Get(bot.GuildShardID(guildID), discordgo.StrID(guildID)+"/guild", &g)
return
}
func GetBotMember(guildID int64) (m *discordgo.Member, err error) {
err = Get(bot.GuildShardID(guildID), discordgo.StrID(guildID)+"/botmember", &m)
return
}
func GetOnlineCount(guildID int64) (c int64, err error) {
err = Get(bot.GuildShardID(guildID), discordgo.StrID(guildID)+"/onlinecount", &c)
return
}
func GetMembers(guildID int64, members ...int64) (m []*discordgo.Member, err error) {
stringed := make([]string, 0, len(members))
for _, v := range members {
stringed = append(stringed, strconv.FormatInt(v, 10))
}
query := url.Values{"users": stringed}
encoded := query.Encode()
err = Get(bot.GuildShardID(guildID), discordgo.StrID(guildID)+"/members?"+encoded, &m)
return
}
func GetMemberColors(guildID int64, members ...int64) (m map[string]int, err error) {
m = make(map[string]int)
stringed := make([]string, 0, len(members))
for _, v := range members {
stringed = append(stringed, strconv.FormatInt(v, 10))
}
query := url.Values{"users": stringed}
encoded := query.Encode()
err = Get(bot.GuildShardID(guildID), discordgo.StrID(guildID)+"/membercolors?"+encoded, &m)
return
}
func GetChannelPermissions(guildID, channelID int64) (perms int64, err error) {
err = Get(bot.GuildShardID(guildID), discordgo.StrID(guildID)+"/channelperms/"+discordgo.StrID(channelID), &perms)
return
}
type NodeStatus struct {
ID string
Shards []*ShardStatus `json:"shards"`
}
func GetNodeStatuses() (st []*NodeStatus, err error) {
// retrieve a list of nodes
// Special handling if were in clustered mode
var clustered bool
err = common.RedisPool.Do(radix.Cmd(&clustered, "EXISTS", "dshardorchestrator_nodes"))
if err != nil {
return nil, err
}
if clustered {
return getNodeStatusesClustered()
}
var status []*ShardStatus
err = Get(0, "gw_status", &status)
if err != nil {
return nil, err
}
return []*NodeStatus{&NodeStatus{
ID: "N/A",
Shards: status,
}}, nil
}
func getNodeStatusesClustered() (st []*NodeStatus, err error) {
var nodeIDs []string
err = common.RedisPool.Do(radix.Cmd(&nodeIDs, "SMEMBERS", "dshardorchestrator_nodes"))
if err != nil {
return nil, err
}
for _, n := range nodeIDs {
// retrieve the REST address for this node
var addr string
err = common.RedisPool.Do(radix.Cmd(&addr, "GET", RedisKeyNodeAddressMapping(n)))
if err != nil {
logrus.WithError(err).Error("failed retrieving rest address for bot for node id: ", n)
continue
}
var status []*ShardStatus
err = GetWithAddress(addr, "gw_status", &status)
if err != nil {
logrus.WithError(err).Error("failed retrieving shard status for node ", n)
continue
}
st = append(st, &NodeStatus{
ID: n,
Shards: status,
})
}
return
}
func SendReconnectShard(shardID int, reidentify bool) (err error) {
queryParams := ""
if reidentify {
queryParams = "?reidentify=1"
}
err = Post(shardID, fmt.Sprintf("shard/%d/reconnect"+queryParams, shardID), nil, nil)
return
}
func SendReconnectAll(reidentify bool) (err error) {
queryParams := ""
if reidentify {
queryParams = "?reidentify=1"
}
err = Post(0, "shard/*/reconnect"+queryParams, nil, nil)
return
}
var (
lastPing time.Time
lastPingMutex sync.RWMutex
)
func RunPinger() {
lastFailed := false
for {
time.Sleep(time.Second)
var dest string
err := Get(0, "ping", &dest)
if err != nil {
if !lastFailed {
logrus.Warn("Ping to bot failed: ", err)
lastFailed = true
}
continue
} else if lastFailed {
logrus.Info("Ping to bot succeeded again after failing!")
}
lastPingMutex.Lock()
lastPing = time.Now()
lastPingMutex.Unlock()
lastFailed = false
}
}
// Returns wether the bot is running or not, (time since last sucessfull ping was less than 5 seconds)
func BotIsRunning() bool {
lastPingMutex.RLock()
defer lastPingMutex.RUnlock()
return time.Since(lastPing) < time.Second*5
}