Add ability to select month for budget

http/budgeting.go

@@ -14,6 +14,9 @@ import (
 type BudgetingData struct {
 	AlwaysNeededData
 	Categories []postgres.GetCategoriesWithBalanceRow
+	Date       time.Time
+	Next       time.Time
+	Previous   time.Time
 }
 
 func (h *Handler) budgeting(c *gin.Context) {
@@ -48,12 +51,13 @@ func (h *Handler) budgeting(c *gin.Context) {
 	}
 
 	firstOfMonth := time.Date(year, time.Month(month), 1, 0, 0, 0, 0, now.Location())
-	lastOfMonth := firstOfMonth.AddDate(0, 1, -1)
+	firstOfNextMonth := firstOfMonth.AddDate(0, 1, 0)
+	firstOfPreviousMonth := firstOfMonth.AddDate(0, -1, 0)
 
 	params := postgres.GetCategoriesWithBalanceParams{
 		BudgetID: budgetUUID,
 		FromDate: firstOfMonth,
-		ToDate:   lastOfMonth,
+		ToDate:   firstOfNextMonth,
 	}
 	categories, err := h.Service.DB.GetCategoriesWithBalance(context.Background(), params)
 	if err != nil {
@@ -64,6 +68,9 @@ func (h *Handler) budgeting(c *gin.Context) {
 	d := BudgetingData{
 		c.MustGet("data").(AlwaysNeededData),
 		categories,
+		firstOfMonth,
+		firstOfNextMonth,
+		firstOfPreviousMonth,
 	}
 
 	c.HTML(http.StatusOK, "budgeting.html", d)

web/budgeting.html

@@ -1,7 +1,9 @@
 
 {{template "base" .}}
 
-{{define "title"}}Budget{{end}}
+{{define "title"}}
+    {{printf "Budget for %s %d" .Date.Month .Date.Year}}
+{{end}}
 
 {{define "new"}}
     {{template "transaction-new"}}
@@ -13,8 +15,8 @@
     <span class="time"></span>
 </div>
 <div>
-    <a href="/budget/{{.Budget.ID}}/{{.Date.Year}}/{{.Date.Month}}">Next Month</a>
-    <a href="/budget/{{.Budget.ID}}/{{.Date.Year}}/{{.Date.Month}}">Previous Month</a>
+    <a href="{{printf "/budget/%s/%d/%d" .Budget.ID .Previous.Year .Previous.Month}}">Previous Month</a>
+    <a href="{{printf "/budget/%s/%d/%d" .Budget.ID .Next.Year .Next.Month}}">Next Month</a>
 </div>
 <table class="container col-lg-12" id="content">
     {{range .Categories}}