Extract another method

http/budgeting.go

@@ -14,7 +14,7 @@ import (
 type BudgetingData struct {
 	AlwaysNeededData
 	Categories       []CategoryWithBalance
-	AvailableBalance postgres.Numeric
+	AvailableBalance float64
 	Date             time.Time
 	Next             time.Time
 	Previous         time.Time
@@ -75,6 +75,12 @@ func (h *Handler) budgeting(c *gin.Context) {
 	}
 	firstOfNextMonth := firstOfMonth.AddDate(0, 1, 0)
 	firstOfPreviousMonth := firstOfMonth.AddDate(0, -1, 0)
+	d := BudgetingData{
+		AlwaysNeededData: c.MustGet("data").(AlwaysNeededData),
+		Date:             firstOfMonth,
+		Next:             firstOfNextMonth,
+		Previous:         firstOfPreviousMonth,
+	}
 
 	categories, err := h.Service.DB.GetCategories(c.Request.Context(), budgetUUID)
 
@@ -84,6 +90,40 @@ func (h *Handler) budgeting(c *gin.Context) {
 		return
 	}
 
+	// skip everything in the future
+	categoriesWithBalance, added, assigned, err := h.calculateBalances(c, budgetUUID, firstOfNextMonth, firstOfMonth, categories, cumultativeBalances)
+	if err != nil {
+		return
+	}
+	d.Categories = categoriesWithBalance
+
+	data := c.MustGet("data").(AlwaysNeededData)
+	var availableBalance float64 = 0
+	for _, cat := range categories {
+		if cat.ID != data.Budget.IncomeCategoryID {
+			continue
+		}
+		availableBalance = -assigned - added
+
+		for _, bal := range cumultativeBalances {
+			if bal.CategoryID != cat.ID {
+				continue
+			}
+
+			if !bal.Date.Before(firstOfNextMonth) {
+				continue
+			}
+
+			availableBalance += bal.Transactions.GetFloat64()
+		}
+	}
+
+	d.AvailableBalance = availableBalance
+
+	c.HTML(http.StatusOK, "budgeting.html", d)
+}
+
+func (h *Handler) calculateBalances(c *gin.Context, budgetUUID uuid.UUID, firstOfNextMonth time.Time, firstOfMonth time.Time, categories []postgres.GetCategoriesRow, cumultativeBalances []postgres.GetCumultativeBalancesRow) ([]CategoryWithBalance, float64, float64, error) {
 	categoriesWithBalance := []CategoryWithBalance{}
 
 	var added float64 = 0
@@ -98,7 +138,6 @@ func (h *Handler) budgeting(c *gin.Context) {
 				continue
 			}
 
-			// skip everything in the future
 			if !bal.Date.Before(firstOfNextMonth) {
 				continue
 			}
@@ -122,39 +161,5 @@ func (h *Handler) budgeting(c *gin.Context) {
 
 		categoriesWithBalance = append(categoriesWithBalance, categoryWithBalance)
 	}
-
-	data := c.MustGet("data").(AlwaysNeededData)
-	var availableBalance float64 = 0
-	for _, cat := range categories {
-		if cat.ID != data.Budget.IncomeCategoryID {
-			continue
-		}
-		availableBalance = -assigned - added
-
-		for _, bal := range cumultativeBalances {
-			if bal.CategoryID != cat.ID {
-				continue
-			}
-
-			if !bal.Date.Before(firstOfNextMonth) {
-				continue
-			}
-
-			availableBalance += bal.Transactions.GetFloat64()
-		}
-	}
-
-	var availableBalanceNum postgres.Numeric
-	availableBalanceNum.Set(availableBalance)
-
-	d := BudgetingData{
-		AlwaysNeededData: c.MustGet("data").(AlwaysNeededData),
-		Categories:       categoriesWithBalance,
-		AvailableBalance: availableBalanceNum,
-		Date:             firstOfMonth,
-		Next:             firstOfNextMonth,
-		Previous:         firstOfPreviousMonth,
-	}
-
-	c.HTML(http.StatusOK, "budgeting.html", d)
+	return categoriesWithBalance, added, assigned, nil
 }

web/budgeting.html

@@ -20,7 +20,7 @@
     <a href="{{printf "/budget/%s/%d/%d" .Budget.ID .Next.Year .Next.Month}}">Next Month</a>
 </div>
 <div>
-    <span>Available Balance: </span>{{template "amount" .AvailableBalance}}
+    <span>Available Balance: </span>{{template "amountf64" .AvailableBalance}}
 </div>
 <table class="container col-lg-12" id="content">
     <tr>