Implement API endpoint for transactions

http/account.go

@@ -52,3 +52,29 @@ func (h *Handler) account(c *gin.Context) {
 
 	c.HTML(http.StatusOK, "account.html", d)
 }
+
+func (h *Handler) transactionsForAccount(c *gin.Context) {
+	accountID := c.Param("accountid")
+	accountUUID, err := uuid.Parse(accountID)
+	if err != nil {
+		c.AbortWithError(http.StatusBadRequest, err)
+		return
+	}
+
+	account, err := h.Service.GetAccount(c.Request.Context(), accountUUID)
+	if err != nil {
+		c.AbortWithError(http.StatusNotFound, err)
+		return
+	}
+
+	transactions, err := h.Service.GetTransactionsForAccount(c.Request.Context(), accountUUID)
+	if err != nil {
+		c.AbortWithError(http.StatusNotFound, err)
+		return
+	}
+
+	c.JSON(http.StatusOK, struct {
+		Account      postgres.Account
+		Transactions []postgres.GetTransactionsForAccountRow
+	}{account, transactions})
+}