urtrator/cache/cache_servers.go

// URTator - Urban Terror server browser and game launcher, written in
// Go.
//
// Copyright (c) 2016, Stanslav N. a.k.a pztrn (or p0z1tr0n)
// All rights reserved.
//
// Licensed under Terms and Conditions of GNU General Public License
// version 3 or any higher.
// ToDo: put full text of license here.
package cache

import (
	// stdlib
	"fmt"

	// local
	"gitlab.com/pztrn/urtrator/cachemodels"
	"gitlab.com/pztrn/urtrator/datamodels"
)

func (c *Cache) CreateServer(addr string) {
	_, ok := c.Servers[addr]
	if !ok {
		c.ServersMutex.Lock()
		c.Servers[addr] = &cachemodels.Server{}
		c.Servers[addr].Server = &datamodels.Server{}
		c.ServersMutex.Unlock()
	} else {
		fmt.Println("Server " + addr + " already exist.")
	}
}

// Flush servers to database.
func (c *Cache) FlushServers(data map[string]string) {
	fmt.Println("Updating servers information in database...")
	raw_cached := []datamodels.Server{}
	Database.Db.Select(&raw_cached, "SELECT * FROM servers")

	// Create map[string]*datamodels.Server once, so we won't iterate
	// over slice of datamodels.Server everytime.
	cached_servers := make(map[string]*datamodels.Server)
	for s := range raw_cached {
		mapping_item_name := raw_cached[s].Ip + ":" + raw_cached[s].Port
		cached_servers[mapping_item_name] = &raw_cached[s]
	}

	new_servers := make(map[string]*datamodels.Server)

	// Update our cached mapping.
	for _, s := range c.Servers {
		mapping_item_name := s.Server.Ip + ":" + s.Server.Port
		_, ok := cached_servers[mapping_item_name]
		if !ok {
			fmt.Println(mapping_item_name + " not found!")
			new_servers[mapping_item_name] = &datamodels.Server{}
			new_servers[mapping_item_name].Ip = s.Server.Ip
			new_servers[mapping_item_name].Port = s.Server.Port
			new_servers[mapping_item_name].Name = s.Server.Name
			new_servers[mapping_item_name].Players = s.Server.Players
			new_servers[mapping_item_name].Bots = s.Server.Bots
			new_servers[mapping_item_name].Maxplayers = s.Server.Maxplayers
			new_servers[mapping_item_name].Ping = s.Server.Ping
			new_servers[mapping_item_name].Map = s.Server.Map
			new_servers[mapping_item_name].Gamemode = s.Server.Gamemode
			new_servers[mapping_item_name].Version = s.Server.Version
			new_servers[mapping_item_name].ExtendedConfig = s.Server.ExtendedConfig
			new_servers[mapping_item_name].PlayersInfo = s.Server.PlayersInfo
			new_servers[mapping_item_name].IsPrivate = s.Server.IsPrivate
			new_servers[mapping_item_name].Favorite = s.Server.Favorite
			new_servers[mapping_item_name].ProfileToUse = s.Server.ProfileToUse
			new_servers[mapping_item_name].Password = s.Server.Password
		} else {
			cached_servers[mapping_item_name].Ip = s.Server.Ip
			cached_servers[mapping_item_name].Port = s.Server.Port
			cached_servers[mapping_item_name].Name = s.Server.Name
			cached_servers[mapping_item_name].Players = s.Server.Players
			cached_servers[mapping_item_name].Bots = s.Server.Bots
			cached_servers[mapping_item_name].Maxplayers = s.Server.Maxplayers
			cached_servers[mapping_item_name].Ping = s.Server.Ping
			cached_servers[mapping_item_name].Map = s.Server.Map
			cached_servers[mapping_item_name].Gamemode = s.Server.Gamemode
			cached_servers[mapping_item_name].Version = s.Server.Version
			cached_servers[mapping_item_name].ExtendedConfig = s.Server.ExtendedConfig
			cached_servers[mapping_item_name].PlayersInfo = s.Server.PlayersInfo
			cached_servers[mapping_item_name].IsPrivate = s.Server.IsPrivate
			cached_servers[mapping_item_name].Favorite = s.Server.Favorite
			cached_servers[mapping_item_name].ProfileToUse = s.Server.ProfileToUse
			cached_servers[mapping_item_name].Password = s.Server.Password
		}
	}

	tx := Database.Db.MustBegin()
	fmt.Println("Adding new servers...")
	if len(new_servers) > 0 {
		for _, srv := range new_servers {
			tx.NamedExec("INSERT INTO servers (ip, port, name, ping, players, maxplayers, gamemode, map, version, extended_config, players_info, is_private, favorite, profile_to_use, bots) VALUES (:ip, :port, :name, :ping, :players, :maxplayers, :gamemode, :map, :version, :extended_config, :players_info, :is_private, :favorite, :profile_to_use, :bots)", srv)
		}
	}
	fmt.Println("Updating cached servers...")
	for _, srv := range cached_servers {
		_, err := tx.NamedExec("UPDATE servers SET name=:name, players=:players, maxplayers=:maxplayers, gamemode=:gamemode, map=:map, ping=:ping, version=:version, extended_config=:extended_config, favorite=:favorite, password=:password, players_info=:players_info, is_private=:is_private, profile_to_use=:profile_to_use, bots=:bots WHERE ip=:ip AND port=:port", &srv)
		if err != nil {
			fmt.Println(err.Error())
		}
	}

	tx.Commit()
	fmt.Println("Done")
}

func (c *Cache) LoadServers(data map[string]string) {
	fmt.Println("Loading servers into cache...")
	c.Servers = make(map[string]*cachemodels.Server)
	// Getting servers from database.
	raw_servers := []datamodels.Server{}
	err := Database.Db.Select(&raw_servers, "SELECT * FROM servers")
	if err != nil {
		fmt.Println(err.Error())
	}

	// Due to nature of pointers and goroutines thing (?) this should
	// be done in this way.
	for _, server := range raw_servers {
		key := server.Ip + ":" + server.Port
		c.CreateServer(key)
		c.Servers[key].Server.Name = server.Name
		c.Servers[key].Server.Ip = server.Ip
		c.Servers[key].Server.Port = server.Port
		c.Servers[key].Server.Players = server.Players
		c.Servers[key].Server.Bots = server.Bots
		c.Servers[key].Server.Maxplayers = server.Maxplayers
		c.Servers[key].Server.Ping = server.Ping
		c.Servers[key].Server.Gamemode = server.Gamemode
		c.Servers[key].Server.Map = server.Map
		c.Servers[key].Server.Version = server.Version
		c.Servers[key].Server.Favorite = server.Favorite
		c.Servers[key].Server.Password = server.Password
		c.Servers[key].Server.ProfileToUse = server.ProfileToUse
		c.Servers[key].Server.ExtendedConfig = server.ExtendedConfig
		c.Servers[key].Server.PlayersInfo = server.PlayersInfo
		c.Servers[key].Server.IsPrivate = server.IsPrivate
	}
	fmt.Println("Load completed.")
}