add config definition

definition/option/option.go

@@ -0,0 +1,100 @@
+package option
+
+import (
+	"gitoa.ru/go-4devs/config/definition"
+)
+
+var _ definition.Option = Option{}
+
+const (
+	Kind = "option"
+)
+
+const (
+	TypeString   = "string"
+	TypeInt      = "int"
+	TypeInt64    = "int64"
+	TypeUint     = "uint"
+	TypeUint64   = "uint64"
+	TypeFloat64  = "float64"
+	TypeBool     = "bool"
+	TypeTime     = "time.Time"
+	TypeDuration = "time.Duration"
+)
+
+func Default(v any) func(*Option) {
+	return func(o *Option) {
+		o.Default = v
+	}
+}
+
+func New(name, desc string, vtype any, opts ...func(*Option)) Option {
+	option := Option{
+		Name:        name,
+		Description: desc,
+		Type:        vtype,
+	}
+
+	for _, opt := range opts {
+		opt(&option)
+	}
+
+	return option
+}
+
+type Option struct {
+	Name        string
+	Description string
+	Type        any
+	Default     any
+	Params      definition.Params
+}
+
+func (o Option) WithParams(params ...definition.Param) Option {
+	return Option{
+		Name:        o.Name,
+		Description: o.Description,
+		Type:        o.Type,
+		Params:      append(params, o.Params...),
+	}
+}
+
+func (o Option) Kind() string {
+	return Kind
+}
+
+func Time(name, desc string, opts ...func(*Option)) Option {
+	return New(name, desc, TypeTime, opts...)
+}
+
+func Duration(name, desc string, opts ...func(*Option)) Option {
+	return New(name, desc, TypeDuration, opts...)
+}
+
+func String(name, desc string, opts ...func(*Option)) Option {
+	return New(name, desc, TypeString, opts...)
+}
+
+func Int(name, desc string, opts ...func(*Option)) Option {
+	return New(name, desc, TypeInt, opts...)
+}
+
+func Int64(name, desc string, opts ...func(*Option)) Option {
+	return New(name, desc, TypeInt64, opts...)
+}
+
+func Uint(name, desc string, opts ...func(*Option)) Option {
+	return New(name, desc, TypeUint, opts...)
+}
+
+func Uint64(name, desc string, opts ...func(*Option)) Option {
+	return New(name, desc, TypeUint64, opts...)
+}
+
+func Float64(name, desc string, opts ...func(*Option)) Option {
+	return New(name, desc, TypeFloat64, opts...)
+}
+
+func Bool(name, desc string, opts ...func(*Option)) Option {
+	return New(name, desc, TypeBool, opts...)
+}

definition/option/tpl/option.tmpl

@@ -0,0 +1,33 @@
+// read{{.FuncName}} {{.Description}}.
+func (i {{.StructName}}) read{{.FuncName}}(ctx context.Context) (v {{.Type}},e error) {
+	val, err := i.Value(ctx, {{ .ParentKeys }}"{{ .Name }}")
+	if err != nil {
+        {{if .HasDefault}}
+        {{$default := .Default}}
+        {{range .DefaultErrors}}
+        if errors.Is(err,{{.}}){
+            return {{$default}}
+		}
+        {{end}}
+        {{end}}
+        return v, fmt.Errorf("read {{.Keys}}:%w",err)
+	}
+
+	{{.Parse "val" "v" .Keys }}
+}
+
+// Read{{.FuncName}} {{.Description}}.
+func (i {{.StructName}}) Read{{.FuncName}}(ctx context.Context) ({{.Type}}, error) {
+    return i.read{{.FuncName}}(ctx)
+}
+
+// {{.FuncName}} {{.Description}}.
+func (i {{.StructName}}) {{.FuncName}}({{if .Context}} ctx context.Context {{end}}) {{.Type}} {
+    {{if not .Context}} ctx := context.Background() {{end}}
+	val, err := i.read{{.FuncName}}(ctx)
+	if err != nil {
+		i.log(ctx, "get {{.Keys}}: %v", err)
+	}
+
+	return val
+}

definition/option/tpl/parse.tmpl

@@ -0,0 +1,3 @@
+{{block "Parse" .}}
+return {{.ValName}}.Parse{{ .FuncType}}()
+{{end}}

definition/option/tpl/unmarshal_json.tmpl

@@ -0,0 +1,8 @@
+{{block "UnmarshalJSON" . }}
+	pval, perr := {{.ValName}}.ParseString()
+	if perr != nil {
+		return {{.Value}}, fmt.Errorf("read {{.Keys}}:%w", perr)
+	}
+
+	return {{.Value}}, {{.Value}}.UnmarshalJSON([]byte(pval))
+{{end}}

definition/option/tpl/unmarshal_text.tmpl

@@ -0,0 +1,8 @@
+{{block "UnmarshalText" . }}
+	pval, perr := {{.ValName}}.ParseString()
+	if perr != nil {
+		return {{.Value}}, fmt.Errorf("read {{.Keys}}:%w", perr)
+	}
+
+	return {{.Value}}, {{.Value}}.UnmarshalText([]byte(pval))
+{{end}}

definition/option/view.go

@@ -0,0 +1,235 @@
+package option
+
+import (
+	"bytes"
+	"embed"
+	"encoding"
+	"encoding/json"
+	"fmt"
+	"io"
+	"reflect"
+	"strings"
+	"text/template"
+	"time"
+
+	"gitoa.ru/go-4devs/config/definition"
+	"gitoa.ru/go-4devs/config/definition/generate"
+)
+
+//go:embed tpl/*
+var tpls embed.FS
+
+//nolint:gochecknoglobals
+var tpl = template.Must(template.New("tpls").ParseFS(tpls, "tpl/*.tmpl"))
+
+//nolint:gochecknoinits
+func init() {
+	generate.MustAdd(Kind, Handle(tpl.Lookup("option.tmpl")))
+}
+
+func Handle(tpl *template.Template) generate.Handle {
+	return func(w io.Writer, h generate.Handler, o definition.Option) error {
+		opt, _ := o.(Option)
+		if err := tpl.Execute(w, View{Option: opt, Handler: h}); err != nil {
+			return fmt.Errorf("option tpl:%w", err)
+		}
+
+		return nil
+	}
+}
+
+type View struct {
+	Option
+	generate.Handler
+}
+
+func (v View) Context() bool {
+	return v.Options().Context
+}
+
+func (v View) FuncName() string {
+	if funcName, ok := v.Option.Params.Get(ViewParamFunctName); ok {
+		name, _ := funcName.(string)
+
+		return name
+	}
+
+	return generate.FuncName(v.Name)
+}
+
+func (v View) Description() string {
+	if desc, ok := v.Option.Params.Get(ViewParamDescription); ok {
+		description, _ := desc.(string)
+
+		return description
+	}
+
+	return v.Option.Description
+}
+
+func (v View) Default() string {
+	switch data := v.Option.Default.(type) {
+	case time.Time:
+		return fmt.Sprintf("time.Parse(%q,time.RFC3339Nano)", data.Format(time.RFC3339Nano))
+	case time.Duration:
+		return fmt.Sprintf("time.ParseDuration(%q)", data)
+	default:
+		return fmt.Sprintf("%#v, nil", data)
+	}
+}
+
+func (v View) HasDefault() bool {
+	return v.Option.Default != nil
+}
+
+func (v View) ParentKeys() string {
+	if len(v.Handler.Keys()) > 0 {
+		return `"` + strings.Join(v.Handler.Keys(), `","`) + `",`
+	}
+
+	return ""
+}
+
+func (v View) Type() string {
+	slice := ""
+
+	if vtype, ok := v.Option.Type.(string); ok {
+		if strings.Contains(vtype, ".") {
+			if name, err := v.AddType(vtype); err == nil {
+				return slice + name
+			}
+		}
+
+		return vtype
+	}
+
+	rtype := reflect.TypeOf(v.Option.Type)
+
+	if rtype.PkgPath() == "" {
+		return rtype.String()
+	}
+
+	if rtype.Kind() == reflect.Slice {
+		slice = "[]"
+	}
+
+	short, err := v.AddType(rtype.PkgPath() + "." + rtype.Name())
+	if err != nil {
+		return err.Error()
+	}
+
+	return slice + short
+}
+
+func (v View) FuncType() string {
+	return generate.FuncName(v.Type())
+}
+
+func (v View) Parse(valName string, value string, keys []string) string {
+	h := parser(v.Option.Type)
+
+	data, err := h(ParseData{
+		Value:   value,
+		ValName: valName,
+		Keys:    keys,
+		View:    v,
+	})
+	if err != nil {
+		return err.Error()
+	}
+
+	return data
+}
+
+//nolint:gochecknoglobals,unparam
+var parses = map[string]func(data ParseData) (string, error){
+	typesIntreface[0].Name(): func(data ParseData) (string, error) {
+		var b bytes.Buffer
+
+		err := tpl.ExecuteTemplate(&b, "unmarshal_text.tmpl", data)
+		if err != nil {
+			return "", fmt.Errorf("execute unmarshal text:%w", err)
+		}
+
+		return b.String(), nil
+	},
+	typesIntreface[1].Name(): func(data ParseData) (string, error) {
+		var b bytes.Buffer
+
+		err := tpl.ExecuteTemplate(&b, "unmarshal_json.tmpl", data)
+		if err != nil {
+			return "", fmt.Errorf("execute unmarshal json:%w", err)
+		}
+
+		return b.String(), nil
+	},
+	TypeInt:     internal,
+	TypeInt64:   internal,
+	TypeBool:    internal,
+	TypeString:  internal,
+	TypeFloat64: internal,
+	TypeUint:    internal,
+	TypeUint64:  internal,
+	"time.Duration": func(data ParseData) (string, error) {
+		return fmt.Sprintf("return %s.ParseDuration()", data.ValName), nil
+	},
+	"time.Time": func(data ParseData) (string, error) {
+		return fmt.Sprintf("return %s.ParseTime()", data.ValName), nil
+	},
+	"any": func(data ParseData) (string, error) {
+		return fmt.Sprintf("return %[2]s, %[1]s.Unmarshal(&%[2]s)", data.ValName, data.Value), nil
+	},
+}
+
+func internal(data ParseData) (string, error) {
+	var b bytes.Buffer
+
+	err := tpl.ExecuteTemplate(&b, "parse.tmpl", data)
+	if err != nil {
+		return "", fmt.Errorf("execute parse.tmpl:%w", err)
+	}
+
+	return b.String(), nil
+}
+
+//nolint:gochecknoglobals
+var typesIntreface = [...]reflect.Type{
+	reflect.TypeOf((*encoding.TextUnmarshaler)(nil)).Elem(),
+	reflect.TypeOf((*json.Unmarshaler)(nil)).Elem(),
+}
+
+func parser(data any) func(ParseData) (string, error) {
+	vtype := reflect.TypeOf(data)
+	name := vtype.Name()
+
+	if v, ok := data.(string); ok {
+		name = v
+	}
+
+	if vtype.Kind() == reflect.Slice {
+		return parses["any"]
+	}
+
+	if h, ok := parses[name]; ok {
+		return h
+	}
+
+	for _, extypes := range typesIntreface {
+		if vtype.Implements(extypes) {
+			return parses[extypes.Name()]
+		}
+
+		if vtype.Kind() != reflect.Ptr && reflect.PointerTo(vtype).Implements(extypes) {
+			return parses[extypes.Name()]
+		}
+	}
+
+	return parses["any"]
+}
+
+type ParseData struct {
+	Value   string
+	ValName string
+	Keys    []string
+	View
+}

definition/option/view_params.go

@@ -0,0 +1,6 @@
+package option
+
+const (
+	ViewParamFunctName   = "view.funcName"
+	ViewParamDescription = "view.description"
+)