kvcondition

README

KV Condition

Simple query language to describe condition for label

• equal rules:
  • value equal key="value"
  • value not equal key!="value"
  • value ends with key$="value"
  • value starts with key^="value"
  • value contains key*="value"
  • has key key
• compose rules:
  • and &
  • or |
  • hoisting operator precedence ()

Documentation

Index

• Variables
• type Condition
  • func And(left Node, right Node) *Condition
  • func Or(left Node, right Node) *Condition
  • func (c *Condition) String() string
• type ConditionOperator
• type KVCondition
  • func ParseKVCondition(r []byte) (*KVCondition, error)
  • func (v KVCondition) IsZero() bool
  • func (v KVCondition) MarshalText() ([]byte, error)
  • func (v *KVCondition) Range(cb func(condition *Rule))
  • func (v *KVCondition) UnmarshalText(data []byte) error
• type Node
• type Operator
  • func ParseOperator(op string) (Operator, error)
  • func (op Operator) Of(key string, value string) *Rule
  • func (op Operator) String() string
• type Rule
  • func (l *Rule) String() string

Variables

var (
	SyntaxErrorMissingRightBracket = errors.New("kv condition missing right bracket")
	SyntaxErrorInvalidCondition    = errors.New("kv condition invalid condition")
)

var (
	UnknownOperator = errors.New("unknown operator")
)

Types

type Condition

type Condition struct {
	Operator ConditionOperator
	Left     Node
	Right    Node
}

func And

func And(left Node, right Node) *Condition

func Or

func Or(left Node, right Node) *Condition

func (*Condition) String

func (c *Condition) String() string

type ConditionOperator

type ConditionOperator int

const (
	ConditionOperatorAND ConditionOperator = iota + 1
	ConditionOperatorOR
)

type KVCondition

type KVCondition struct {
	Node
}

openapi:strfmt kv-condition

func ParseKVCondition

func ParseKVCondition(r []byte) (*KVCondition, error)

func (KVCondition) IsZero

func (v KVCondition) IsZero() bool

func (KVCondition) MarshalText

func (v KVCondition) MarshalText() ([]byte, error)

func (*KVCondition) Range

func (v *KVCondition) Range(cb func(condition *Rule))

func (*KVCondition) UnmarshalText

func (v *KVCondition) UnmarshalText(data []byte) error

type Node

type Node interface {
	String() string
}

type Operator

type Operator int

const (
	OperatorExists Operator = iota
	OperatorEqual
	OperatorNotEqual
	OperatorContains
	OperatorStartsWith
	OperatorEndsWith
)

func ParseOperator

func ParseOperator(op string) (Operator, error)

func (Operator) Of

func (op Operator) Of(key string, value string) *Rule

func (Operator) String

func (op Operator) String() string

type Rule

type Rule struct {
	Operator Operator
	Key      []byte
	Value    []byte
}

func (*Rule) String

func (l *Rule) String() string