better api paths

internal/model/model.go

@@ -27,6 +27,14 @@ type Department struct {
 	CostCenter string `json:"cost_center"`
 }
 
+type GetDepartmentBudget struct {
+	Code string `json:"code"`
+}
+
+type GetDepartmentActual struct {
+	Code string `json:"code"`
+}
+
 type GLAccount struct {
 	ID          int           `json:"id"`
 	Code        string        `json:"code"`
@@ -35,6 +43,14 @@ type GLAccount struct {
 	FavourHigh  bool          `json:"favour_high"`
 }
 
+type GetGLAccountBudget struct {
+	Code string `json:"code"`
+}
+
+type GetGLAccountActual struct {
+	Code string `json:"code"`
+}
+
 type Budget struct {
 	ID           int           `json:"id"`
 	FiscalYear   int           `json:"fiscal_year"`
@@ -94,44 +110,64 @@ func (cBudget *CreateBudgetRequest) Valid() []string {
 }
 
 type UpdateBudgetRequest struct {
-	ID           int           `json:"id"`
-	FiscalYear   int           `json:"fiscal_year"`
-	FiscalPeriod int           `json:"fiscal_period"`
-	Version      BudgetVersion `json:"version"`
-	DepartmentID int           `json:"department_id"`
-	GLAccountID  int           `json:"gl_account_id"`
-	Amount       float64       `json:"amount"`
-	Currency     string        `json:"currency"`
-	Notes        string        `json:"notes"`
-	ChangedBy    string        `json:"created_by"`
+	ID           int    // required, not a pointer
+	ChangedBy    string // required, not a pointer
+	FiscalYear   *int
+	FiscalPeriod *int
+	Version      *string
+	DepartmentID *int
+	GLAccountID  *int
+	Amount       *float64
+	Currency     *string
+	Notes        *string
+}
+
+type DeleteBudgetRequest struct {
+	ID int `json:"id"`
 }
 
 func (uBudget *UpdateBudgetRequest) Valid() []string {
 	var errs []string
 
-	if uBudget.FiscalYear < 1 || uBudget.FiscalYear > 2200 {
-		errs = append(errs, "fiscal_year must be between 1 and 2200")
-	}
-	if uBudget.FiscalPeriod < 1 || uBudget.FiscalPeriod > 12 {
-		errs = append(errs, "fiscal_period must be between 1 and 12")
-	}
-	if uBudget.Version == "" {
-		errs = append(errs, "version is required")
-	}
-	if uBudget.DepartmentID == 0 {
-		errs = append(errs, "department_id is required")
-	}
-	if uBudget.GLAccountID == 0 {
-		errs = append(errs, "gl_account_id is required")
-	}
-	if uBudget.Amount <= 0 {
-		errs = append(errs, "amount must be greater than 0")
-	}
-	if uBudget.Currency == "" {
-		errs = append(errs, "currency is required")
+	// Always required: identity + audit
+	if uBudget.ID == 0 {
+		errs = append(errs, "id is required")
 	}
 	if uBudget.ChangedBy == "" {
-		errs = append(errs, "created_by is required")
+		errs = append(errs, "changed_by is required")
+	}
+
+	// Validate fields only if they were provided
+	if uBudget.FiscalYear != nil {
+		if *uBudget.FiscalYear < 1 || *uBudget.FiscalYear > 2200 {
+			errs = append(errs, "fiscal_year must be between 1 and 2200")
+		}
+	}
+	if uBudget.FiscalPeriod != nil {
+		if *uBudget.FiscalPeriod < 1 || *uBudget.FiscalPeriod > 12 {
+			errs = append(errs, "fiscal_period must be between 1 and 12")
+		}
+	}
+	if uBudget.Amount != nil && *uBudget.Amount <= 0 {
+		errs = append(errs, "amount must be greater than 0")
+	}
+	if uBudget.Version != nil && *uBudget.Version == "" {
+		errs = append(errs, "version cannot be empty")
+	}
+	if uBudget.Currency != nil && *uBudget.Currency == "" {
+		errs = append(errs, "currency cannot be empty")
+	}
+
+	// At least one field must be set — otherwise there's nothing to do
+	if uBudget.FiscalYear == nil &&
+		uBudget.FiscalPeriod == nil &&
+		uBudget.Version == nil &&
+		uBudget.DepartmentID == nil &&
+		uBudget.GLAccountID == nil &&
+		uBudget.Amount == nil &&
+		uBudget.Currency == nil &&
+		uBudget.Notes == nil {
+		errs = append(errs, "at least one field must be provided to update")
 	}
 
 	return errs