Add meta to exchange

exchange/backends/csv/csv.go

@@ -19,7 +19,7 @@ type CSV struct {
 }
 
 func (c *CSV) Rows(res *exchange.Resource) (exchange.Rows, error) {
-	var rows = Rows{CSV: c}
+	var rows = Rows{CSV: c, Resource: res}
 
 	csvfile, err := os.Open(c.Filename)
 	if err == nil {
@@ -40,11 +40,13 @@ func (csv *CSV) WriteLog(string) {
 
 type Rows struct {
 	*CSV
-	current int
-	total   int
+	Resource *exchange.Resource
+	current  int
+	total    int
 }
 
 func (rows Rows) Columns() []string {
+	metas := rows.Resource.GetMetas([]string{})
 	if rows.total > 0 {
 		return rows.records[0]
 	}

exchange/exchange.go

@@ -20,16 +20,13 @@ func New(config qor.Config) *Exchange {
 type Resource struct {
 	resource.Resource
 	Config *Config
+	metas  []*Meta
 }
 
 type Config struct {
 	Permission *roles.Permission
 }
 
-type Meta struct {
-	Name string
-}
-
 func NewResource(value interface{}, config ...Config) *Resource {
 	res := Resource{Resource: *resource.New(value)}
 	if len(config) > 0 {
@@ -38,15 +35,17 @@ func NewResource(value interface{}, config ...Config) *Resource {
 	return &res
 }
 
-func (exchange *Exchange) AddResource(value interface{}, config ...Config) {
-	res := Resource{Resource: *resource.New(value)}
-	if len(config) > 0 {
-		res.Config = &config[0]
-	}
-	exchange.resources = append(exchange.resources, &res)
+func (res *Resource) Meta(meta Meta) *Meta {
+	res.metas = append(res.metas, &meta)
+	return &meta
 }
 
-func (res *Resource) Meta(meta Meta) {
+func (res *Resource) GetMetas([]string) []resource.Metaor {
+	metas := []resource.Metaor{}
+	for _, meta := range res.metas {
+		metas = append(metas, meta)
+	}
+	return metas
 }
 
 func (res *Resource) Import(container Container, context *qor.Context) error {

exchange/meta.go

@@ -0,0 +1,46 @@
+package exchange
+
+import (
+	"github.com/qor/qor"
+	"github.com/qor/qor/resource"
+	"github.com/qor/qor/roles"
+)
+
+type Meta struct {
+	Name       string
+	Valuer     func(interface{}, *qor.Context) interface{}
+	Setter     func(resource interface{}, metaValue *resource.MetaValue, context *qor.Context)
+	Permission *roles.Permission
+}
+
+func (meta *Meta) GetName() string {
+	return meta.Name
+}
+
+func (meta *Meta) GetFieldName() string {
+	return meta.Name
+}
+
+func (meta *Meta) GetMetas() []resource.Metaor {
+	// FIXME
+	return []resource.Metaor{}
+}
+
+func (meta *Meta) GetResource() resource.Resourcer {
+	return nil
+}
+
+func (meta *Meta) GetValuer() func(interface{}, *qor.Context) interface{} {
+	return meta.Valuer
+}
+
+func (meta *Meta) GetSetter() func(resource interface{}, metaValue *resource.MetaValue, context *qor.Context) {
+	return meta.Setter
+}
+
+func (meta *Meta) HasPermission(mode roles.PermissionMode, context *qor.Context) bool {
+	if meta.Permission == nil {
+		return true
+	}
+	return meta.Permission.HasPermission(mode, context.Roles...)
+}