Add package flagzog:

- Add FlagValidator interface
- Add BoolFlag
- Add Int64Flag
- Add StringFlag

Signed-off-by: Jan Tytgat <jan.tytgat@corelayer.eu>

flagzog/flags.go

@@ -0,0 +1,109 @@
+package flagzog
+
+import (
+	"fmt"
+
+	"github.com/Oudwins/zog"
+)
+
+func NewBoolFlag(name string, schema *zog.BoolSchema[bool], usage string) BoolFlag {
+	return BoolFlag{
+		name:   name,
+		schema: schema,
+		usage:  usage,
+	}
+}
+
+type BoolFlag struct {
+	name   string
+	schema *zog.BoolSchema[bool]
+	usage  string
+	Value  bool
+}
+
+func (f BoolFlag) Name() string {
+	return f.name
+}
+
+func (f BoolFlag) Usage() string {
+	return f.usage
+}
+
+func (f BoolFlag) Validate() ([]string, error) {
+	var messages []string
+	if issues := f.schema.Validate(&f.Value); issues != nil {
+		for _, issue := range issues {
+			messages = append(messages, issue.Message)
+		}
+		return messages, fmt.Errorf("validation failed for flag '%s' with value '%s'", f.Name(), f.Value)
+	}
+	return messages, nil
+}
+
+func NewInt64Flag(name string, schema *zog.NumberSchema[int64], usage string) Int64Flag {
+	return Int64Flag{
+		name:   name,
+		schema: schema,
+		usage:  usage,
+	}
+}
+
+type Int64Flag struct {
+	name   string
+	schema *zog.NumberSchema[int64]
+	usage  string
+	Value  int64
+}
+
+func (f Int64Flag) Name() string {
+	return f.name
+}
+
+func (f Int64Flag) Usage() string {
+	return f.usage
+}
+
+func (f Int64Flag) Validate() ([]string, error) {
+	var messages []string
+	if issues := f.schema.Validate(&f.Value); issues != nil {
+		for _, issue := range issues {
+			messages = append(messages, issue.Message)
+		}
+		return messages, fmt.Errorf("validation failed for flag '%s' with value '%s'", f.Name(), f.Value)
+	}
+	return messages, nil
+}
+
+func NewStringFlag(name string, schema *zog.StringSchema[string], usage string) StringFlag {
+	return StringFlag{
+		name:   name,
+		schema: schema,
+		usage:  usage,
+	}
+}
+
+type StringFlag struct {
+	name   string
+	schema *zog.StringSchema[string]
+	usage  string
+	Value  string
+}
+
+func (f StringFlag) Name() string {
+	return f.name
+}
+
+func (f StringFlag) Usage() string {
+	return f.usage
+}
+
+func (f StringFlag) Validate() ([]string, error) {
+	var messages []string
+	if issues := f.schema.Validate(&f.Value); issues != nil {
+		for _, issue := range issues {
+			messages = append(messages, issue.Message)
+		}
+		return messages, fmt.Errorf("validation failed for flag '%s' with value '%s'", f.Name(), f.Value)
+	}
+	return messages, nil
+}

flagzog/validator.go

@@ -0,0 +1,27 @@
+package flagzog
+
+import (
+	"context"
+	"log/slog"
+)
+
+type FlagValidator interface {
+	Name() string
+	Validate() ([]string, error)
+	Usage() string
+}
+
+func ValidateFlags(ctx context.Context, logger *slog.Logger, flags []FlagValidator) ([]string, error) {
+	var validatedFlags []string
+	var err error
+
+	for _, flag := range flags {
+		var issues []string
+		if issues, err = flag.Validate(); err != nil {
+			logger.Log(ctx, slog.LevelError, "validation failed", slog.String("flag", flag.Name()), slog.Any("issues", issues))
+			return validatedFlags, err
+		}
+		validatedFlags = append(validatedFlags, flag.Name())
+	}
+	return validatedFlags, nil
+}