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/*
Wrapper around the HTTP trading API for type safety 'n' stuff.
*/
package tradeapi
import (
"encoding/json"
"errors"
"fmt"
"github.com/Philipp15b/go-steam/community"
"github.com/Philipp15b/go-steam/economy/inventory"
"github.com/Philipp15b/go-steam/netutil"
"github.com/Philipp15b/go-steam/steamid"
"io/ioutil"
"net/http"
"regexp"
"strconv"
"time"
)
const tradeUrl = "https://steamcommunity.com/trade/%d/"
type Trade struct {
client *http.Client
other steamid.SteamId
LogPos uint // not automatically updated
Version uint // Incremented for each item change by Steam; not automatically updated.
// the `sessionid` cookie is sent as a parameter/POST data for CSRF protection.
sessionId string
baseUrl string
}
// Creates a new Trade based on the given cookies `sessionid`, `steamLogin`, `steamLoginSecure` and the trade partner's Steam ID.
func New(sessionId, steamLogin, steamLoginSecure string, other steamid.SteamId) *Trade {
client := new(http.Client)
client.Timeout = 10 * time.Second
t := &Trade{
client: client,
other: other,
sessionId: sessionId,
baseUrl: fmt.Sprintf(tradeUrl, other),
Version: 1,
}
community.SetCookies(t.client, sessionId, steamLogin, steamLoginSecure)
return t
}
type Main struct {
PartnerOnProbation bool
}
var onProbationRegex = regexp.MustCompile(`var g_bTradePartnerProbation = (\w+);`)
// Fetches the main HTML page and parses it. Thread-safe.
func (t *Trade) GetMain() (*Main, error) {
resp, err := t.client.Get(t.baseUrl)
if err != nil {
return nil, err
}
defer resp.Body.Close()
body, err := ioutil.ReadAll(resp.Body)
if err != nil {
return nil, err
}
match := onProbationRegex.FindSubmatch(body)
if len(match) == 0 {
return nil, errors.New("tradeapi.GetMain: Could not find probation info")
}
return &Main{
string(match[1]) == "true",
}, nil
}
// Ajax POSTs to an API endpoint that should return a status
func (t *Trade) postWithStatus(url string, data map[string]string) (*Status, error) {
status := new(Status)
req := netutil.NewPostForm(url, netutil.ToUrlValues(data))
// Tales of Madness and Pain, Episode 1: If you forget this, Steam will return an error
// saying "missing required parameter", even though they are all there. IT WAS JUST THE HEADER, ARGH!
req.Header.Add("Referer", t.baseUrl)
resp, err := t.client.Do(req)
if err != nil {
return nil, err
}
defer resp.Body.Close()
err = json.NewDecoder(resp.Body).Decode(status)
if err != nil {
return nil, err
}
return status, nil
}
func (t *Trade) GetStatus() (*Status, error) {
return t.postWithStatus(t.baseUrl+"tradestatus/", map[string]string{
"sessionid": t.sessionId,
"logpos": strconv.FormatUint(uint64(t.LogPos), 10),
"version": strconv.FormatUint(uint64(t.Version), 10),
})
}
// Thread-safe.
func (t *Trade) GetForeignInventory(contextId uint64, appId uint32, start *uint) (*inventory.PartialInventory, error) {
data := map[string]string{
"sessionid": t.sessionId,
"steamid": fmt.Sprintf("%d", t.other),
"contextid": strconv.FormatUint(contextId, 10),
"appid": strconv.FormatUint(uint64(appId), 10),
}
if start != nil {
data["start"] = strconv.FormatUint(uint64(*start), 10)
}
req, err := http.NewRequest("GET", t.baseUrl+"foreigninventory?"+netutil.ToUrlValues(data).Encode(), nil)
if err != nil {
panic(err)
}
req.Header.Add("Referer", t.baseUrl)
return inventory.DoInventoryRequest(t.client, req)
}
// Thread-safe.
func (t *Trade) GetOwnInventory(contextId uint64, appId uint32) (*inventory.Inventory, error) {
return inventory.GetOwnInventory(t.client, contextId, appId)
}
func (t *Trade) Chat(message string) (*Status, error) {
return t.postWithStatus(t.baseUrl+"chat", map[string]string{
"sessionid": t.sessionId,
"logpos": strconv.FormatUint(uint64(t.LogPos), 10),
"version": strconv.FormatUint(uint64(t.Version), 10),
"message": message,
})
}
func (t *Trade) AddItem(slot uint, itemId, contextId uint64, appId uint32) (*Status, error) {
return t.postWithStatus(t.baseUrl+"additem", map[string]string{
"sessionid": t.sessionId,
"slot": strconv.FormatUint(uint64(slot), 10),
"itemid": strconv.FormatUint(itemId, 10),
"contextid": strconv.FormatUint(contextId, 10),
"appid": strconv.FormatUint(uint64(appId), 10),
})
}
func (t *Trade) RemoveItem(slot uint, itemId, contextId uint64, appId uint32) (*Status, error) {
return t.postWithStatus(t.baseUrl+"removeitem", map[string]string{
"sessionid": t.sessionId,
"slot": strconv.FormatUint(uint64(slot), 10),
"itemid": strconv.FormatUint(itemId, 10),
"contextid": strconv.FormatUint(contextId, 10),
"appid": strconv.FormatUint(uint64(appId), 10),
})
}
func (t *Trade) SetCurrency(amount uint, currencyId, contextId uint64, appId uint32) (*Status, error) {
return t.postWithStatus(t.baseUrl+"setcurrency", map[string]string{
"sessionid": t.sessionId,
"amount": strconv.FormatUint(uint64(amount), 10),
"currencyid": strconv.FormatUint(uint64(currencyId), 10),
"contextid": strconv.FormatUint(contextId, 10),
"appid": strconv.FormatUint(uint64(appId), 10),
})
}
func (t *Trade) SetReady(ready bool) (*Status, error) {
return t.postWithStatus(t.baseUrl+"toggleready", map[string]string{
"sessionid": t.sessionId,
"version": strconv.FormatUint(uint64(t.Version), 10),
"ready": fmt.Sprint(ready),
})
}
func (t *Trade) Confirm() (*Status, error) {
return t.postWithStatus(t.baseUrl+"confirm", map[string]string{
"sessionid": t.sessionId,
"version": strconv.FormatUint(uint64(t.Version), 10),
})
}
func (t *Trade) Cancel() (*Status, error) {
return t.postWithStatus(t.baseUrl+"cancel", map[string]string{
"sessionid": t.sessionId,
})
}
func isSuccess(v interface{}) bool {
if m, ok := v.(map[string]interface{}); ok {
return m["success"] == true
}
return false
}
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