Golang Database.ItemForName方法代碼示例

func getItemPrices(
	db evego.Database,
	mkt evego.Market,
	req *[]queryItem,
	station *evego.Station,
	loc string) (*map[string]responseItem, error) {
	respItems := make(map[string]responseItem)
	for _, i := range *req {
		dbItem, err := db.ItemForName(i.ItemName)
		if err != nil {
			continue
		}
		var (
			item   responseItem
			orders *[]evego.Order
		)
		if station != nil {
			orders, err = mkt.OrdersInStation(dbItem, station)
		} else {
			orders, err = mkt.OrdersForItem(dbItem, loc, evego.AllOrders)
		}
		if err != nil {
			return nil, fmt.Errorf("Unable to retrieve order information for %v: %v", dbItem.Name, err)
		}
		item = summarizeOrders(db, *orders, dbItem)
		respItems[item.ItemName] = item
	}
	return &respItems, nil
}

// ReprocessItems returns a handler function that takes as input an item list
// and returns the reprocessing output of each inventory line.
func ReprocessItems(db evego.Database, mkt evego.Market) web.HandlerFunc {
	jita, err := db.StationForID(60003760) // Jita IV - Moon 4 - Caldari Navy Assembly Plant
	if err != nil {
		log.Fatalf("Seriously, guys, something's gone wrong with the database!")
	}
	return func(c web.C, w http.ResponseWriter, r *http.Request) {
		contentType := r.Header.Get("Content-Type")
		contentType, _, err := mime.ParseMediaType(contentType)
		if err != nil {
			http.Error(w, "Bad request content type", http.StatusBadRequest)
			w.Write([]byte(`{"status": "Error"}`))
			return
		}
		if contentType != "application/json" {
			http.Error(w, "Request must be of type application/json", http.StatusUnsupportedMediaType)
			w.Write([]byte(`{"status": "Error"}`))
			return
		}
		reqBody, err := ioutil.ReadAll(r.Body)
		if err != nil {
			http.Error(w, "Unable to process request body", http.StatusBadRequest)
			w.Write([]byte(`{"status": "Error"}`))
			return
		}
		var req reproQuery
		err = json.Unmarshal(reqBody, &req)
		if err != nil {
			http.Error(w, err.Error(), http.StatusBadRequest)
			w.Write([]byte(`{"status": "Error"}`))
			return
		}

		// Convert 0..100 scale to 0..1.
		stationYield := math.Max(math.Min(1, req.StationYield*0.01), 0)
		taxRate := math.Max(math.Min(1, req.TaxRate*0.01), 0)
		reproSkills := industry.ReproSkills{
			ScrapmetalProcessing: req.ScrapmetalSkill,
		}
		results := make(map[string][]evego.InventoryLine)
		for _, i := range req.Items {
			item, err := db.ItemForName(i.ItemName)
			if err != nil {
				continue
			}
			itemResults, err := industry.ReprocessItem(db, item, i.Quantity, stationYield, taxRate, reproSkills)
			if err != nil {
				http.Error(w, "Unable to compute reprocessing output", http.StatusInternalServerError)
				w.Write([]byte(`{"status": "Error"}`))
				return
			}
			results[item.Name] = itemResults
		}
		prices := make(map[string]responseItem)

		// Loop over each item that was reprocessed.
		for _, itemOut := range results {
			// For each item in its component materials,
			for _, item := range itemOut {
				// Check if we already know its price in Jita
				itemName := item.Item.Name
				_, found := prices[itemName]
				if !found {
					// If not there, get its price.
					myPrices, err := getItemPrices(db, mkt, &[]queryItem{{Quantity: 1, ItemName: itemName}}, jita, "")
					if err != nil {
						http.Error(w, `{"status": "Error", "error": "Unable to look up prices (reprocessing)"}`,
							http.StatusInternalServerError)
						return
					}
					prices[itemName] = (*myPrices)[itemName]
				}
			}
		}

		response := reproResults{
			Items:  results,
			Prices: prices,
		}
		resultsJSON, _ := json.Marshal(response)
		w.Write(resultsJSON)
	}
}