ADD: added first version

internal/alpaca/client.go

@@ -0,0 +1,82 @@
+package alpaca
+
+import (
+	"time"
+
+	"alpaca-bot/internal/config"
+	"alpaca-bot/internal/model"
+
+	"github.com/alpacahq/alpaca-trade-api-go/v3/alpaca"
+	"github.com/alpacahq/alpaca-trade-api-go/v3/marketdata"
+	"github.com/shopspring/decimal"
+)
+
+type Client struct {
+	alpacaClient *alpaca.Client
+	mdClient     *marketdata.Client
+}
+
+// Create new Alpaca client
+func NewClient(cfg config.AlpacaConfig) *Client {
+	c := alpaca.NewClient(alpaca.ClientOpts{
+		APIKey:    cfg.ApiKey,
+		APISecret: cfg.ApiSecret,
+		BaseURL:   cfg.TradeURL,
+	})
+
+	md := marketdata.NewClient(marketdata.ClientOpts{
+		APIKey:    cfg.ApiKey,
+		APISecret: cfg.ApiSecret,
+	})
+
+	return &Client{
+		alpacaClient: c,
+		mdClient:     md,
+	}
+}
+
+// Fetch historical bars
+func (c *Client) GetHistoricalBars(symbol string, timeframe string, start, end time.Time) ([]model.Bar, error) {
+	req := marketdata.GetBarsRequest{
+		TimeFrame: marketdata.OneHour, // e.g. "1Day", "1Min"
+		Start:     start,
+		End:       end,
+	}
+
+	resp, err := c.mdClient.GetBars(symbol, req)
+	if err != nil {
+		return nil, err
+	}
+
+	bars := []model.Bar{}
+	for _, b := range resp {
+		bars = append(bars, model.Bar{
+			Symbol: symbol,
+			Time:   b.Timestamp,
+			Open:   b.Open,
+			High:   b.High,
+			Low:    b.Low,
+			Close:  b.Close,
+			// Volume: b.Volume,
+		})
+	}
+
+	return bars, nil
+}
+
+// Example: submit an order
+func (c *Client) SubmitOrder(symbol string, qty *decimal.Decimal, side alpaca.Side, orderType alpaca.OrderType, timeInForce alpaca.TimeInForce) (*alpaca.Order, error) {
+	orderReq := alpaca.PlaceOrderRequest{
+		Symbol:      symbol,
+		Qty:         qty,
+		Side:        side,
+		Type:        orderType,
+		TimeInForce: timeInForce,
+	}
+
+	order, err := c.alpacaClient.PlaceOrder(orderReq)
+	if err != nil {
+		return nil, err
+	}
+	return order, nil
+}