feat: recurring expenses and reports

internal/model/budget.go

@@ -0,0 +1,42 @@
+package model
+
+import "time"
+
+type BudgetPeriod string
+
+const (
+	BudgetPeriodWeekly  BudgetPeriod = "weekly"
+	BudgetPeriodMonthly BudgetPeriod = "monthly"
+	BudgetPeriodYearly  BudgetPeriod = "yearly"
+)
+
+type BudgetStatus string
+
+const (
+	BudgetStatusOnTrack BudgetStatus = "on_track"
+	BudgetStatusWarning BudgetStatus = "warning"
+	BudgetStatusOver    BudgetStatus = "over"
+)
+
+type Budget struct {
+	ID          string       `db:"id"`
+	SpaceID     string       `db:"space_id"`
+	TagID       string       `db:"tag_id"`
+	AmountCents int          `db:"amount_cents"`
+	Period      BudgetPeriod `db:"period"`
+	StartDate   time.Time    `db:"start_date"`
+	EndDate     *time.Time   `db:"end_date"`
+	IsActive    bool         `db:"is_active"`
+	CreatedBy   string       `db:"created_by"`
+	CreatedAt   time.Time    `db:"created_at"`
+	UpdatedAt   time.Time    `db:"updated_at"`
+}
+
+type BudgetWithSpent struct {
+	Budget
+	TagName    string  `db:"tag_name"`
+	TagColor   *string `db:"tag_color"`
+	SpentCents int
+	Percentage float64
+	Status     BudgetStatus
+}

internal/model/expense.go

@@ -10,16 +10,17 @@ const (
 )
 
 type Expense struct {
-	ID              string      `db:"id"`
-	SpaceID         string      `db:"space_id"`
-	CreatedBy       string      `db:"created_by"`
-	Description     string      `db:"description"`
-	AmountCents     int         `db:"amount_cents"`
-	Type            ExpenseType `db:"type"`
-	Date            time.Time   `db:"date"`
-	PaymentMethodID *string     `db:"payment_method_id"`
-	CreatedAt       time.Time   `db:"created_at"`
-	UpdatedAt       time.Time   `db:"updated_at"`
+	ID                 string      `db:"id"`
+	SpaceID            string      `db:"space_id"`
+	CreatedBy          string      `db:"created_by"`
+	Description        string      `db:"description"`
+	AmountCents        int         `db:"amount_cents"`
+	Type               ExpenseType `db:"type"`
+	Date               time.Time   `db:"date"`
+	PaymentMethodID    *string     `db:"payment_method_id"`
+	RecurringExpenseID *string     `db:"recurring_expense_id"`
+	CreatedAt          time.Time   `db:"created_at"`
+	UpdatedAt          time.Time   `db:"updated_at"`
 }
 
 type ExpenseWithTags struct {

internal/model/recurring_expense.go

@@ -0,0 +1,41 @@
+package model
+
+import "time"
+
+type Frequency string
+
+const (
+	FrequencyDaily    Frequency = "daily"
+	FrequencyWeekly   Frequency = "weekly"
+	FrequencyBiweekly Frequency = "biweekly"
+	FrequencyMonthly  Frequency = "monthly"
+	FrequencyYearly   Frequency = "yearly"
+)
+
+type RecurringExpense struct {
+	ID              string      `db:"id"`
+	SpaceID         string      `db:"space_id"`
+	CreatedBy       string      `db:"created_by"`
+	Description     string      `db:"description"`
+	AmountCents     int         `db:"amount_cents"`
+	Type            ExpenseType `db:"type"`
+	PaymentMethodID *string     `db:"payment_method_id"`
+	Frequency       Frequency   `db:"frequency"`
+	StartDate       time.Time   `db:"start_date"`
+	EndDate         *time.Time  `db:"end_date"`
+	NextOccurrence  time.Time   `db:"next_occurrence"`
+	IsActive        bool        `db:"is_active"`
+	CreatedAt       time.Time   `db:"created_at"`
+	UpdatedAt       time.Time   `db:"updated_at"`
+}
+
+type RecurringExpenseWithTags struct {
+	RecurringExpense
+	Tags []*Tag
+}
+
+type RecurringExpenseWithTagsAndMethod struct {
+	RecurringExpense
+	Tags          []*Tag
+	PaymentMethod *PaymentMethod
+}

internal/model/report.go

@@ -0,0 +1,23 @@
+package model
+
+import "time"
+
+type DailySpending struct {
+	Date       time.Time `db:"date"`
+	TotalCents int       `db:"total_cents"`
+}
+
+type MonthlySpending struct {
+	Month      string `db:"month"`
+	TotalCents int    `db:"total_cents"`
+}
+
+type SpendingReport struct {
+	ByTag           []*TagExpenseSummary
+	DailySpending   []*DailySpending
+	MonthlySpending []*MonthlySpending
+	TopExpenses     []*ExpenseWithTagsAndMethod
+	TotalIncome     int
+	TotalExpenses   int
+	NetBalance      int
+}