init

api/value_handler.go

@@ -0,0 +1,106 @@
+package api
+
+import (
+	"encoding/json"
+	"net/http"
+	"pokeval/db"
+	"pokeval/logic"
+	"strconv"
+
+	"github.com/gorilla/mux"
+)
+
+// GET /api/v1/value/{auction_id}
+func GetCardValue(w http.ResponseWriter, r *http.Request) {
+	vars := mux.Vars(r)
+	auctionID, err := strconv.Atoi(vars["auction_id"])
+	if err != nil {
+		http.Error(w, "Ungültige Auktions-ID", http.StatusBadRequest)
+		return
+	}
+
+	// 1️⃣ Hole die Basis-Auktionsdaten
+	var cardID int
+	query := `SELECT card_id FROM auctions WHERE id = ?`
+	err = db.DB.QueryRow(query, auctionID).Scan(&cardID)
+	if err != nil {
+		http.Error(w, "Auktion nicht gefunden", http.StatusNotFound)
+		return
+	}
+
+	// 2️⃣ Base Sales: Alle Verkäufe dieser Karte
+	baseSales := fetchBaseSales(cardID)
+
+	// 3️⃣ Exact Match Sales: Verkäufe mit gleichem Grading, Autograph, Misprint
+	exactSales := fetchExactMatchSales(auctionID)
+
+	// 4️⃣ Bewertungsfaktoren (Dummy-Werte oder aus DB/Logik ableiten)
+	factors := map[string]float64{
+		"GF":  1.6,
+		"RF":  2.0,
+		"EF":  2.0,
+		"ST":  3.5,
+		"DF":  1.4,
+		"AF":  2.0,
+		"MF":  1.5,
+		"TAF": 200,
+	}
+
+	// 5️⃣ Wert berechnen
+	value := logic.CalculateCardValue(baseSales, exactSales, factors)
+
+	// 6️⃣ Response
+	resp := map[string]interface{}{
+		"auction_id":       auctionID,
+		"calculated_value": value,
+		"currency":         "EUR",
+		"factors":          factors,
+	}
+
+	w.Header().Set("Content-Type", "application/json")
+	json.NewEncoder(w).Encode(resp)
+}
+
+// Holt alle Preise der Basisverkäufe (gleiche Karte)
+func fetchBaseSales(cardID int) []float64 {
+	rows, err := db.DB.Query("SELECT price FROM auctions WHERE card_id = ?", cardID)
+	if err != nil {
+		return []float64{}
+	}
+	defer rows.Close()
+
+	var prices []float64
+	for rows.Next() {
+		var price float64
+		rows.Scan(&price)
+		prices = append(prices, price)
+	}
+	return prices
+}
+
+// Holt alle Exact Match Verkäufe (vereinfachte Logik)
+func fetchExactMatchSales(auctionID int) []float64 {
+	// Beispielhafte Logik: Verkäufe mit gleichem Grading, Autograph & Misprint
+	query := `
+	SELECT a.price 
+	FROM auctions a
+	JOIN auction_gradings ag ON ag.auction_id = a.id
+	WHERE a.id != ? AND ag.grading_id IN (
+		SELECT grading_id FROM auction_gradings WHERE auction_id = ?
+	)
+	`
+
+	rows, err := db.DB.Query(query, auctionID, auctionID)
+	if err != nil {
+		return []float64{}
+	}
+	defer rows.Close()
+
+	var prices []float64
+	for rows.Next() {
+		var price float64
+		rows.Scan(&price)
+		prices = append(prices, price)
+	}
+	return prices
+}