104 lines
2.6 KiB
Go
104 lines
2.6 KiB
Go
package manifest
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// This file contains types and helper methods for wildcard containers.
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// A wildcard container can contain either a finite set of elements or
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// every possible element, in which case it is named `wildcard`.
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import (
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"bytes"
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"encoding/json"
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)
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// WildStrings represents a string set which can be a wildcard.
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type WildStrings struct {
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Value []string
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}
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// WildPermissionDescs represents a PermissionDescriptor set which can be a wildcard.
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type WildPermissionDescs struct {
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Value []PermissionDesc
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}
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// Contains checks if v is in the container.
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func (c *WildStrings) Contains(v string) bool {
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if c.IsWildcard() {
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return true
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}
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for _, s := range c.Value {
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if v == s {
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return true
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}
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}
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return false
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}
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// Contains checks if v is in the container.
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func (c *WildPermissionDescs) Contains(v PermissionDesc) bool {
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if c.IsWildcard() {
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return true
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}
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for _, u := range c.Value {
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if u.Equals(v) {
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return true
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}
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}
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return false
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}
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// IsWildcard returns true iff the container is a wildcard.
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func (c *WildStrings) IsWildcard() bool { return c.Value == nil }
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// IsWildcard returns true iff the container is a wildcard.
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func (c *WildPermissionDescs) IsWildcard() bool { return c.Value == nil }
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// Restrict transforms the container into an empty one.
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func (c *WildStrings) Restrict() { c.Value = []string{} }
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// Restrict transforms the container into an empty one.
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func (c *WildPermissionDescs) Restrict() { c.Value = []PermissionDesc{} }
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// Add adds v to the container.
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func (c *WildStrings) Add(v string) { c.Value = append(c.Value, v) }
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// Add adds v to the container.
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func (c *WildPermissionDescs) Add(v PermissionDesc) { c.Value = append(c.Value, v) }
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// MarshalJSON implements the json.Marshaler interface.
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func (c WildStrings) MarshalJSON() ([]byte, error) {
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if c.IsWildcard() {
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return []byte(`"*"`), nil
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}
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return json.Marshal(c.Value)
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}
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// MarshalJSON implements the json.Marshaler interface.
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func (c WildPermissionDescs) MarshalJSON() ([]byte, error) {
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if c.IsWildcard() {
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return []byte(`"*"`), nil
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}
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return json.Marshal(c.Value)
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}
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// UnmarshalJSON implements the json.Unmarshaler interface.
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func (c *WildStrings) UnmarshalJSON(data []byte) error {
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if !bytes.Equal(data, []byte(`"*"`)) {
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ss := []string{}
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if err := json.Unmarshal(data, &ss); err != nil {
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return err
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}
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c.Value = ss
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}
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return nil
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}
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// UnmarshalJSON implements the json.Unmarshaler interface.
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func (c *WildPermissionDescs) UnmarshalJSON(data []byte) error {
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if !bytes.Equal(data, []byte(`"*"`)) {
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us := []PermissionDesc{}
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if err := json.Unmarshal(data, &us); err != nil {
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return err
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}
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c.Value = us
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}
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return nil
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}
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