From 92d84f6633767830ed964ebab8c3b94c77663394 Mon Sep 17 00:00:00 2001
From: Alexander Neonxp Kiryukhin <i@neonxp.ru>
Date: Tue, 10 Mar 2026 14:44:50 +0300
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---
 model/directive.go | 137 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 137 insertions(+)
 create mode 100644 model/directive.go

(limited to 'model/directive.go')

diff --git a/model/directive.go b/model/directive.go
new file mode 100644
index 0000000..a4ab032
--- /dev/null
+++ b/model/directive.go
@@ -0,0 +1,137 @@
+// 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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