/
database.go
733 lines (616 loc) · 18.5 KB
/
database.go
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package gostuff
import (
"bufio"
"bytes"
"database/sql"
"encoding/base64"
"encoding/hex"
"encoding/json"
"fmt"
"io/ioutil"
"log"
"os"
"os/exec"
"runtime"
"strings"
"time"
"github.com/go-ini/ini"
_ "github.com/go-sql-driver/mysql"
)
// an individual game
type GoGame struct {
ID int
White string
Black string
GameType string
WhiteRating int
BlackRating int
WhiteMinutes int
WhiteSeconds int
BlackMinutes int
BlackSeconds int
TimeControl int
Moves string //json this back to a struct of Moves
Total int
Result int //2 means draw
Status string
Date string
Time string
Rated string
CountryWhite string
CountryBlack string
}
type DatabaseInfo struct {
Host string
User string
Password string
DbName string
Port string
}
var (
isWindows = false
USER_CONFIG_PATH = "secret/config.txt"
ROOT_CONFIG_PATH = "secret/root.txt"
)
var db *sql.DB
// returns false if database setup failed, backup directory is passed in
func DbSetup(backup string) bool {
if runtime.GOOS == "windows" {
isWindows = true
}
//Checks if backup folder for database export exists
exists := IsDirectory(backup)
if exists == false {
err := os.Mkdir(backup, 0777)
if err != nil {
fmt.Println("database.go DbSetup 1, error creating backup directory", err)
}
}
var sqlOpenFile = ROOT_CONFIG_PATH
if IsEnvironmentTravis() {
sqlOpenFile = "_travis/data/dbtravis.txt"
}
var err error
dbString, database := ReadFile(sqlOpenFile)
db, err = sql.Open("mysql", dbString)
if err != nil {
fmt.Println("Error opening Database DBSetup 2", err)
return false
}
//if database ping fails here that means connection is alive but database is missing
if db.Ping() != nil {
fmt.Println("Database", database, "does not exist")
fmt.Println("Please wait while database is imported...")
result := importDatabase()
if result == false {
result = importTemplateDatabase()
if result == false {
fmt.Println("database.go Dbsetup FAILED to import both databases!")
return false
} else {
fmt.Println("Empty template database successfully imported!")
}
} else {
fmt.Println(database, "database successfully imported!")
}
// Pinging database again to see if newly database exists
if db.Ping() != nil {
fmt.Println("database.go Dbsetup 5 ", database, " is still missing after import!!!")
return false
}
}
fmt.Println("MySQL is now connected.")
return true
}
// Returns global database handler
func GetDb() *sql.DB {
return db
}
// Sets the global database handler
func SetDb(dataDb *sql.DB) {
db = dataDb
}
// Returns true if the environment is in Travis
func IsEnvironmentTravis() bool {
if os.Getenv("GOCHESSENV") == "travis" {
return true
}
return false
}
// Returns true if the environment is in App Veyor
func IsEnvironmentAppVeyor() bool {
if os.Getenv("APPVEYOR") == "True" {
return true
}
return false
}
// checks if database connection is open, returns true if MySQL is running
// the parameter path is where the text file is located
func CheckDBConnection(path string) bool {
config, err := os.Open(path)
defer config.Close()
if err != nil {
fmt.Println("database.go checkDBConnection 1", err)
}
scanner := bufio.NewScanner(config)
//creating new string to append database info
dbString := ""
scanner.Scan()
//user
dbData := scanner.Text()
dbString = dbString + dbData + ":"
//pass
scanner.Scan()
dbData = scanner.Text()
//decode
ans, _ := hex.DecodeString(dbData)
result, _ := base64.StdEncoding.DecodeString(string(ans))
answer := string(result)
dbString = dbString + answer + "@tcp("
//host
scanner.Scan()
dbData = scanner.Text()
dbString = dbString + dbData + ":"
//port
scanner.Scan()
dbData = scanner.Text()
dbString = dbString + dbData + ")/"
//database name
scanner.Scan()
dbData = scanner.Text()
dbString = dbString + dbData
var testDB *sql.DB
testDB, err = sql.Open("mysql", dbString)
if err != nil {
fmt.Println("Error opening Database checkDBConnection 2", err)
return false
}
defer testDB.Close()
if testDB.Ping() != nil {
fmt.Println("Database ping failed. Please check if the database server is running.")
return false
}
return true
}
func (databaseInfo *DatabaseInfo) ReadFile(path string) {
log := log.New(os.Stdout, "", log.LstdFlags|log.Lshortfile)
config, err := os.Open(path)
defer config.Close()
if err != nil {
log.Println(err)
}
scanner := bufio.NewScanner(config)
scanner.Scan()
//user
databaseInfo.User = scanner.Text()
//pass
scanner.Scan()
//decode
ans, _ := hex.DecodeString(scanner.Text())
result, _ := base64.StdEncoding.DecodeString(string(ans))
databaseInfo.Password = string(result)
//host
scanner.Scan()
databaseInfo.Host = scanner.Text()
//port
scanner.Scan()
databaseInfo.Port = scanner.Text()
//database name
scanner.Scan()
databaseInfo.DbName = scanner.Text()
}
// the parameter path is where the text file is located containing the database connection info
// if password is blank when encoded it will be blank when decoded
func ReadFile(path string) (string, string) {
config, err := os.Open(path)
defer config.Close()
if err != nil {
log.Println("database.go ReadFile 1 ", err)
}
scanner := bufio.NewScanner(config)
//creating new string to append database info
dbString := ""
scanner.Scan()
//user
dbData := scanner.Text()
dbString = dbString + dbData + ":"
//pass
scanner.Scan()
dbData = scanner.Text()
//decode
ans, _ := hex.DecodeString(dbData)
result, _ := base64.StdEncoding.DecodeString(string(ans))
answer := string(result)
dbString = dbString + answer + "@tcp("
//host
scanner.Scan()
dbData = scanner.Text()
dbString = dbString + dbData + ":"
//port
scanner.Scan()
dbData = scanner.Text()
dbString = dbString + dbData + ")/"
//database name
scanner.Scan()
dbData = scanner.Text()
db := dbData
dbString = dbString + dbData
return dbString, db
}
// fetches players bullet, blitz and standard rating
func GetRating(name string) (errMessage string, bullet, blitz, standard int16, correspondence int16) {
problems, _ := os.OpenFile("logs/errors.txt", os.O_APPEND|os.O_WRONLY, 0666)
defer problems.Close()
log := log.New(problems, "", log.LstdFlags|log.Lshortfile)
//check if database connection is open
if db.Ping() != nil {
log.Println("DATABASE DOWN!")
return "Database down", 0, 0, 0, 0
}
//looking up players rating
err2 := db.QueryRow("SELECT bullet, blitz, standard, correspondence FROM rating WHERE username=?",
name).Scan(&bullet, &blitz, &standard, &correspondence)
// Player doesn't exist, assume its a guest
if err2 != nil {
return "", 1500, 1500, 1500, 1500
}
return "", bullet, blitz, standard, correspondence
}
// fetches players bullet, blitz and standard rating and RD
func GetRatingAndRD(name string) (errRate string, bullet, blitz, standard, correspondence, bulletRD,
blitzRD, standardRD float64, correspondenceRD float64) {
problems, _ := os.OpenFile("logs/errors.txt", os.O_APPEND|os.O_WRONLY, 0666)
defer problems.Close()
log := log.New(problems, "", log.LstdFlags|log.Lshortfile)
//check if database connection is open
if db.Ping() != nil {
log.Println("DATABASE DOWN!")
return "DB down @GetRatingAndRD()", 1500, 1500, 1500, 1500, 350.0, 350.0, 350.0, 350.0
}
//looking up players rating
err2 := db.QueryRow("SELECT bullet, blitz, standard, correspondence, bulletRD,"+
" blitzRD, standardRD, correspondenceRD FROM rating WHERE username=?",
name).Scan(&bullet, &blitz, &standard, &correspondence,
&bulletRD, &blitzRD, &standardRD, &correspondenceRD)
if err2 != nil {
log.Println(err2)
return "No such player", 1500, 1500, 1500, 1500, 350.0, 350.0, 350.0, 350.0
}
return "", bullet, blitz, standard, correspondence, bulletRD, blitzRD, standardRD, correspondenceRD
}
// updates both players chess rating
func updateRating(gameType string, white string, whiteRating float64, whiteRD float64,
black string, blackRating float64, blackRD float64) {
problems, _ := os.OpenFile("logs/errors.txt", os.O_APPEND|os.O_WRONLY, 0666)
defer problems.Close()
log := log.New(problems, "", log.LstdFlags|log.Lshortfile)
//check if database connection is open
if db.Ping() != nil {
log.Println("DATABASE DOWN!")
return
}
//setting verify to yes and deleting row from activate table
stmt, err := db.Prepare("UPDATE rating SET " + gameType + "=?," + gameType +
"RD=?" + " where username=?")
defer stmt.Close()
if err != nil {
log.Println(err)
return
}
res, err := stmt.Exec(whiteRating, whiteRD, white)
if err != nil {
log.Println(err)
return
}
affect, err := res.RowsAffected()
if err != nil {
log.Println(err)
return
}
log.Printf("%s rating has changed and %d row was updated.\n", white, affect)
//setting verify to yes and deleting row from activate table
stmt, err = db.Prepare("UPDATE rating SET " + gameType + "=?," + gameType +
"RD=?" + " where username=?")
if err != nil {
log.Println(err)
return
}
res, err = stmt.Exec(blackRating, blackRD, black)
if err != nil {
log.Println(err)
return
}
affect, err = res.RowsAffected()
if err != nil {
log.Println(err)
return
}
log.Printf("%s rating has changed and %d row was updated.\n", black, affect)
}
// stores game into MySQL database as a string
func storeGame(totalMoves int, allMoves []byte, game *ChessGame) {
moves := string(allMoves)
problems, _ := os.OpenFile("logs/errors.txt", os.O_APPEND|os.O_WRONLY, 0666)
defer problems.Close()
log := log.New(problems, "", log.LstdFlags|log.Lshortfile)
//check if database connection is open
if db.Ping() != nil {
log.Println("DATABASE DOWN!")
return
}
//preparing token activation
stmt, err := db.Prepare("INSERT games SET white=?, black=?, gametype=?, rated=?, " +
"whiterating=?, blackrating=?, timecontrol=?, moves=?, totalmoves=?, " +
"result=?, status=?, date=?, time=?, countrywhite=?, countryblack=?")
defer stmt.Close()
if err != nil {
log.Println(err)
return
}
date := time.Now()
res, err := stmt.Exec(game.WhitePlayer, game.BlackPlayer, game.GameType, game.Rated,
game.WhiteRating, game.BlackRating, game.TimeControl, moves, totalMoves,
game.Result, game.Status, date, date, game.CountryWhite, game.CountryBlack)
if err != nil {
log.Println(err)
return
}
id, err := res.LastInsertId()
if err != nil {
log.Println("database.go storeGame 4 ", err)
return
}
log.Printf("Game ID %d has been updated in the games table.\n", id)
}
// gets all games by player from database and stores them in array of structs
func GetGames(name string) (storage []GoGame) {
problems, err := os.OpenFile("logs/errors.txt", os.O_APPEND|os.O_WRONLY, 0666)
defer problems.Close()
log := log.New(problems, "", log.LstdFlags|log.Lshortfile)
rows, err := db.Query("SELECT * FROM games WHERE white=? or black=?", name, name)
if err != nil {
log.Println(err)
}
defer rows.Close()
var all GoGame
for rows.Next() {
err = rows.Scan(&all.ID, &all.White, &all.Black, &all.GameType, &all.Rated,
&all.WhiteRating, &all.BlackRating, &all.TimeControl, &all.Moves,
&all.Total, &all.Result, &all.Status, &all.Date, &all.Time, &all.CountryWhite, &all.CountryBlack)
if err != nil {
log.Println(err)
}
storage = append(storage, all)
}
return storage
}
func GetSaved(name string) (storage []GoGame) {
problems, err := os.OpenFile("logs/errors.txt", os.O_APPEND|os.O_WRONLY, 0666)
defer problems.Close()
log := log.New(problems, "", log.LstdFlags|log.Lshortfile)
rows, err := db.Query("SELECT * FROM saved WHERE white=? or black=?", name, name)
if err != nil {
log.Println(err)
}
defer rows.Close()
var all GoGame
for rows.Next() {
err = rows.Scan(&all.ID, &all.White, &all.Black, &all.GameType, &all.Rated,
&all.WhiteRating, &all.BlackRating, &all.BlackMinutes, &all.BlackSeconds,
&all.WhiteMinutes, &all.WhiteSeconds, &all.TimeControl, &all.Moves, &all.Total,
&all.Status, &all.Date, &all.Time, &all.CountryWhite, &all.CountryBlack)
if err != nil {
log.Println(err)
}
storage = append(storage, all)
}
return storage
}
// fetches saved/adjourned game from database
func (game *ChessGame) fetchSavedGame(id string, user string) bool {
problems, err := os.OpenFile("logs/errors.txt", os.O_APPEND|os.O_WRONLY, 0666)
defer problems.Close()
log := log.New(problems, "", log.LstdFlags|log.Lshortfile)
//these are in the database but not part of the ChessGame struct
var moves string
var totalmoves int
//game status options are:
//White for white to move or Black for black to move, white won, black won, stalemate or draw.
err = db.QueryRow("SELECT white, black, gametype, rated, whiterating, "+
"blackrating, blackminutes, blackseconds, whiteminutes, whiteseconds, "+
"timecontrol, moves, totalmoves, status, countrywhite, countryblack FROM saved WHERE id=?", id).Scan(&game.WhitePlayer,
&game.BlackPlayer, &game.GameType, &game.Rated, &game.WhiteRating, &game.BlackRating, &game.BlackMinutes,
&game.BlackSeconds, &game.WhiteMinutes, &game.WhiteSeconds, &game.TimeControl, &moves,
&totalmoves, &game.Status, &game.CountryWhite, &game.CountryBlack)
if err != nil {
log.Println(err)
}
game.Type = "chess_game"
var holder []GameMove
storage := []byte(moves)
err = json.Unmarshal(storage, &holder)
if err != nil {
log.Println(err)
}
game.GameMoves = holder
game.PendingDraw = false
var start int = 0
for {
if _, ok := All.Games[start]; ok {
start++
} else {
break
}
}
//value := fmt.Sprintf("%d", start)
game.ID = start
//used in backend to keep track of all pending games waiting for a player to accept
All.Games[start] = game
//intitalizes all the variables of the game
InitGame(game.ID, game.WhitePlayer, game.BlackPlayer)
table := All.Games[game.ID]
for i := 0; i < len(game.GameMoves); i++ {
err = table.Validator.MoveStr(game.GameMoves[i].S + game.GameMoves[i].T + game.GameMoves[i].P)
if err != nil {
log.Println("something went wrong in move validation in fetchSavedGame of saved game id ",
game.GameMoves[i].S+game.GameMoves[i].T+game.GameMoves[i].P, game.ID)
//undo all game setup and break out
delete(All.Games, game.ID)
return false
}
}
PrivateChat[game.WhitePlayer] = game.BlackPlayer
PrivateChat[game.BlackPlayer] = game.WhitePlayer
//starting white's clock first, this goroutine will keep track of both players clock for this game
go table.StartClock(game.ID, game.WhiteMinutes, game.WhiteSeconds, user)
//delete saved game from database now that its in memory
stmt, err := db.Prepare("DELETE FROM saved where id=?")
defer stmt.Close()
if err != nil {
log.Println(err)
return false
}
res, err := stmt.Exec(id)
if err != nil {
log.Println(err)
return false
}
affect, err := res.RowsAffected()
if err != nil {
log.Println(err)
return false
}
log.Printf("%d row was deleted from the saved table by user %s\n", affect, user)
return true
}
// returns true if username already exists, this function assumes database is already pinged
func CheckUserNameInDb(username string) bool {
var name string
//checking if name exists
_ = db.QueryRow("SELECT username FROM userinfo WHERE username=?", username).Scan(&name)
if strings.EqualFold(username, name) { // already exists, case insensitive comparison
return true
} else {
return false
}
}
// Checks forum to see if initial forum rows are missing, if they are then initialize them
func InitForum() {
var rows int
err := db.QueryRow("SELECT COUNT(*) FROM forums").Scan(&rows)
if err != nil {
fmt.Println(err)
return
}
// Primary key ID is autoincremented and does need to be specified
type ForumData struct {
title string
description string
totalthreads int
totalposts int
recentuser string
date time.Time
}
initialForumData := []ForumData{
ForumData{
title: "General Chess Discussion",
description: "Discuss general chess topics here",
totalthreads: 0,
totalposts: 0,
recentuser: "",
date: time.Now(),
},
ForumData{
title: "Feedback and Bug Reports",
description: "Report bugs and suggest improvements here",
totalthreads: 0,
totalposts: 0,
recentuser: "",
date: time.Now(),
},
}
if rows == 0 {
for _, value := range initialForumData {
// The initialize forum with default values in database
stmt, err := db.Prepare(`INSERT INTO forums (title, description,
totalthreads, totalposts, recentuser, date) VALUES (?, ?, ?, ?, ?, ?)`)
defer stmt.Close()
if err != nil {
fmt.Println("InitForum 1", err)
return
}
_, err = stmt.Exec(value.title, value.description, value.totalthreads,
value.totalposts, value.recentuser, value.date)
if err != nil {
fmt.Println("InitForum 2", err)
return
}
}
} else {
fmt.Println("No need to initialize forum tables, everything is good to go!")
}
}
// Configures settings of MySQL .ini file
func SetupMySqlIni() {
if runtime.GOOS == "windows" {
configMySqlIni("C:/my.ini")
} else {
configMySqlIni(os.Getenv("HOME") + "/.my.cnf")
}
}
func configMySqlIni(mysqlIniPath string) {
log := log.New(os.Stdout, "", log.LstdFlags|log.Lshortfile)
var databaseInfo DatabaseInfo
databaseInfo.ReadFile(ROOT_CONFIG_PATH)
found := IsFileExist(mysqlIniPath)
if found {
cfg, err := ini.Load(mysqlIniPath)
if err != nil {
log.Println(err)
return
}
if cfg.Section("client").Key("password").String() == "" ||
cfg.Section("client").Key("user").String() == "" {
_, err = cfg.Section("client").NewKey("user", databaseInfo.User)
if err != nil {
log.Println(err)
return
}
_, err = cfg.Section("client").NewKey("password", databaseInfo.Password)
if err != nil {
log.Println(err)
return
}
cfg.SaveTo(mysqlIniPath)
}
} else {
err := ioutil.WriteFile(mysqlIniPath,
[]byte("[client]\nuser = "+databaseInfo.User+"\npassword = "+databaseInfo.Password), 0666)
if err != nil {
log.Println(err)
return
}
log.Println("Created ini file at ", mysqlIniPath)
}
}
func executeSqlScript(sqlFilePath string) {
log := log.New(os.Stdout, "", log.LstdFlags|log.Lshortfile)
var databaseInfo DatabaseInfo
databaseInfo.ReadFile(ROOT_CONFIG_PATH)
cmd := exec.Command("mysql", "-h"+databaseInfo.Host, "-P"+databaseInfo.Port,
"-D"+databaseInfo.DbName)
dump, err := os.Open(sqlFilePath)
if err != nil {
log.Println(err)
return
}
cmd.Stdin = dump
var out, stderr bytes.Buffer
cmd.Stdout = &out
cmd.Stderr = &stderr
err = cmd.Run()
if err != nil {
fmt.Println(fmt.Sprintf("Error executing query. Command Output: %+v\n: %+v, %v", out.String(), stderr.String(), err))
log.Fatalf("Error executing query. Command Output: %+v\n: %+v, %v", out.String(), stderr.String(), err)
}
}