/
mtgstocks.go
248 lines (213 loc) · 5.04 KB
/
mtgstocks.go
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package mtgstocks
import (
"errors"
"fmt"
"sync"
"time"
"github.com/mtgban/go-mtgban/mtgban"
"github.com/mtgban/go-mtgban/mtgmatcher"
)
const (
defaultConcurrency = 8
)
type MTGStocks struct {
LogCallback mtgban.LogCallbackFunc
inventoryDate time.Time
MaxConcurrency int
inventory mtgban.InventoryRecord
marketplace map[string]mtgban.InventoryRecord
}
type requestChan struct {
name string
interest StocksInterest
}
type responseChan struct {
cardId string
entry mtgban.InventoryEntry
}
var availableNames = []string{
"Average Day", "Average Week", "Market Day", "Market Week",
}
func (stks *MTGStocks) printf(format string, a ...interface{}) {
if stks.LogCallback != nil {
stks.LogCallback("[STKS] "+format, a...)
}
}
func NewScraper() *MTGStocks {
stks := MTGStocks{}
stks.inventory = mtgban.InventoryRecord{}
stks.marketplace = map[string]mtgban.InventoryRecord{}
stks.MaxConcurrency = defaultConcurrency
return &stks
}
func (stks *MTGStocks) processEntry(channel chan<- responseChan, req requestChan) error {
if req.interest.Percentage < 0 {
return nil
}
theCard, err := preprocess(req.interest.Print.Name, req.interest.Print.SetName, req.interest.Foil)
if err != nil {
return nil
}
cardId, err := mtgmatcher.Match(theCard)
if errors.Is(err, mtgmatcher.ErrUnsupported) {
return nil
} else if err != nil {
switch theCard.Edition {
case "Alliances",
"Fallen Empires",
"Homelands",
"World Championship Decks":
return nil
default:
if mtgmatcher.IsBasicLand(theCard.Name) {
return nil
}
}
stks.printf("%q", theCard)
stks.printf("%s | %s | %v", req.interest.Print.Name, req.interest.Print.SetName, req.interest.Foil)
var alias *mtgmatcher.AliasingError
if errors.As(err, &alias) {
probes := alias.Probe()
for _, probe := range probes {
card, _ := mtgmatcher.GetUUID(probe)
stks.printf("- %s", card)
}
}
return err
}
link, err := getLink(req.interest.Print.Slug)
if err != nil {
stks.printf("invalid data type used for %s", req.interest.Print.Name)
}
out := responseChan{
cardId: cardId,
entry: mtgban.InventoryEntry{
Price: req.interest.PresentPrice,
Quantity: 1,
URL: link,
SellerName: req.name + " " + mtgmatcher.Title(req.interest.InterestType),
},
}
channel <- out
return nil
}
func (stks *MTGStocks) scrape() error {
averagesRegular, err := AverageInterests(false)
if err != nil {
return err
}
averagesFoil, err := AverageInterests(true)
if err != nil {
return err
}
marketsRegular, err := MarketInterests(false)
if err != nil {
return err
}
marketsFoil, err := MarketInterests(true)
if err != nil {
return err
}
pages := make(chan requestChan)
channel := make(chan responseChan)
var wg sync.WaitGroup
for i := 0; i < stks.MaxConcurrency; i++ {
wg.Add(1)
go func() {
for page := range pages {
err := stks.processEntry(channel, page)
if err != nil {
stks.printf("%s", err)
}
}
wg.Done()
}()
}
go func() {
for _, interest := range averagesFoil {
pages <- requestChan{
name: "Average",
interest: interest,
}
}
for _, interest := range averagesRegular {
pages <- requestChan{
name: "Average",
interest: interest,
}
}
for _, interest := range marketsFoil {
pages <- requestChan{
name: "Market",
interest: interest,
}
}
for _, interest := range marketsRegular {
pages <- requestChan{
name: "Market",
interest: interest,
}
}
close(pages)
wg.Wait()
close(channel)
}()
for result := range channel {
err := stks.inventory.Add(result.cardId, &result.entry)
if err != nil {
stks.printf("%s", err.Error())
continue
}
}
stks.inventoryDate = time.Now()
return nil
}
func (stks *MTGStocks) Inventory() (mtgban.InventoryRecord, error) {
if len(stks.inventory) > 0 {
return stks.inventory, nil
}
err := stks.scrape()
if err != nil {
return nil, err
}
return stks.inventory, nil
}
func (stks *MTGStocks) InventoryForSeller(sellerName string) (mtgban.InventoryRecord, error) {
if len(stks.inventory) == 0 {
_, err := stks.Inventory()
if err != nil {
return nil, err
}
}
inventory, found := stks.marketplace[sellerName]
if found {
return inventory, nil
}
for card := range stks.inventory {
for i := range stks.inventory[card] {
if stks.inventory[card][i].SellerName == sellerName {
if stks.inventory[card][i].Price == 0 {
continue
}
if stks.marketplace[sellerName] == nil {
stks.marketplace[sellerName] = mtgban.InventoryRecord{}
}
stks.marketplace[sellerName][card] = append(stks.marketplace[sellerName][card], stks.inventory[card][i])
}
}
}
if len(stks.marketplace[sellerName]) == 0 {
return nil, fmt.Errorf("seller %s not found", sellerName)
}
return stks.marketplace[sellerName], nil
}
func (tcg *MTGStocks) MarketNames() []string {
return availableNames
}
func (stks *MTGStocks) Info() (info mtgban.ScraperInfo) {
info.Name = "MTGStocks"
info.Shorthand = "STKS"
info.InventoryTimestamp = &stks.inventoryDate
info.MetadataOnly = true
return
}