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// Package model implements custom types and methods used in conf parser.
//
// This file is part of conf library.
// Copyright (C) 2026 Alexander NeonXP Kiryukhin <i@neonxp.ru>
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <https://www.gnu.org/licenses/>.
package model
import (
"strconv"
"strings"
)
type Directive struct {
Name Ident
RawValues []any
}
// Group returns group of directive.
func (c *Directive) Group() Group {
if c == nil {
return Group{}
}
if len(c.RawValues) > 0 {
last := c.RawValues[len(c.RawValues)-1]
if g, ok := last.(Group); ok {
return g
}
}
return Group{}
}
// Value returns first argument of directive.
func (c *Directive) Value() any {
args := c.Values()
if len(args) > 0 {
return args[0]
}
return nil
}
// String returns first argument of directive as string.
func (c *Directive) String() string {
args := c.Values()
if len(args) > 0 {
if s, ok := args[0].(string); ok {
return s
}
}
return ""
}
// Int returns first argument of directive as int.
func (c *Directive) Int() int {
args := c.Values()
if len(args) > 0 {
if s, ok := args[0].(int); ok {
return s
}
}
return 0
}
// Float returns first argument of directive as int.
func (c *Directive) Float() float64 {
args := c.Values()
if len(args) > 0 {
if s, ok := args[0].(float64); ok {
return s
}
}
return 0
}
// Bool returns first argument of directive as boolean.
func (c *Directive) Bool() bool {
args := c.Values()
if len(args) > 0 {
if s, ok := args[0].(bool); ok {
return s
}
}
return false
}
// Values returns directive values without group.
func (c *Directive) Values() []any {
if c == nil {
return []any{}
}
result := make([]any, 0, len(c.RawValues))
for _, rv := range c.RawValues {
if _, ok := rv.(Group); ok {
continue
}
result = append(result, rv)
}
return result
}
type Lookup func(key string) (string, bool)
// StringExt joins all values of directive in single string.
// Idents passes to identLookup func, e.g.`os.LookupEnv`.
func (c *Directive) StringExt(sep string, identLookup Lookup) string {
args := c.Values()
stringSl := make([]string, len(args))
for i, it := range args {
switch it := it.(type) {
case string:
stringSl[i] = it
case float64:
stringSl[i] = strconv.FormatFloat(it, 'g', 5, 64)
case int:
stringSl[i] = strconv.Itoa(it)
case bool:
stringSl[i] = strconv.FormatBool(it)
case Ident:
if newVal, isset := identLookup(string(it)); isset {
stringSl[i] = newVal
}
}
}
return strings.Join(stringSl, sep)
}
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