graph

package
v0.0.0-...-d0a596a Latest Latest
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 Go to latest Published: Feb 24, 2025 License: MIT Imports: 12 Imported by: 0

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Constants

View Source 
const (
	DOT      = '.'
	COMMA    = ','
	PLUS     = '+'
	HYPHEN   = '-'
	EXCLAM   = '!'
	USCORE   = '_'
	LPAREN   = '('
	SQUOTE   = '\''
	DQUOTE   = '"'
	RPAREN   = ')'
	LCURLY   = '{'
	RCURLY   = '}'
	ESCAPE   = '\\'
	ASTERISK = '*'
)

Variables

This section is empty.

Functions

func SplitFieldsQ 

func SplitFieldsQ(inline string) []string

InlineFieldsQ split given values into set of Field(s)Q selection.

Types

type Args 

type Args map[string]any

Args of the query

func (Args) Clone 

func (vs Args) Clone() Args

func (Args) Get 

func (vs Args) Get(param string) any

func (Args) Has 

func (vs Args) Has(param string) (ok bool)

func (Args) Page 

func (vs Args) Page() uint32

func (*Args) Set 

func (vs *Args) Set(param string, value any) error

func (Args) Size 

func (vs Args) Size() int32

func (Args) Sort 

func (vs Args) Sort() []string

func (Args) ValueOf 

func (vs Args) ValueOf(param string, typeOf Input) (value any, err error)

type Argument 

type Argument struct {
	// Name of the Argument
	Name string `json:"name"`
	// Type of the Argument
	Type Input `json:"typeOf"`
	// OPTIONAL. Default Value
	Value any `json:"value,omitempty"`
}

Input Argument descriptor

func (*Argument) IsValid 

func (e *Argument) IsValid() bool

IsValid Argument descriptor for use

func (*Argument) Optional 

func (e *Argument) Optional() bool

Optional -if- has default value

func (*Argument) Required 

func (e *Argument) Required() bool

Required -if- has no default value

type Bool 

type Bool struct{}

func (Bool) GoString 

func (c Bool) GoString() string

func (Bool) InputValue 

func (c Bool) InputValue(src any) (set any, err error)

type FieldEncoding 

type FieldEncoding func(syntax *FieldExpansion)

FieldEncoding as an expansion option

func DefaultFields 

func DefaultFields(q ...string) FieldEncoding

DefaultFields FieldEncoding Option. If no ?fields= were specified, this set of `q` will be used.

func NoArgs 

func NoArgs() FieldEncoding

NoArgs FieldEncoding Option. Disallow field[.arg(input)]* component(s)

func NoNested 

func NoNested() FieldEncoding

NoQuery FieldEncoding Option. Does NOT expose .query(),.. component(s)

func Sorting 

func Sorting() FieldEncoding

Sorting FieldEncoding Option. Cause to validate ?sort= fields spec

type FieldExpansion 

type FieldExpansion struct {
	// Invalidate field.query(args) expansion
	NoArgs bool
	// Invalidate field{nested,..} expansion
	NoNested bool
	// Default fields set if none specified
	// Used to reassign Metadata.Default set.
	Default []string
	// Sorting fields specification mode ?
	//
	// sort   ::= spec *( "," spec )
	// spec   ::= [ ORDER ] name / nest
	// nest   ::= name "{" nest / sort "}"
	// name   ::= ALPHA / DIGIT / USCORE ; field name
	//
	// ALPHA    = %x41-5A / %x61-7A  ; "A"-"Z" / "a"-"z"
	// DIGIT    = %x30-39            ; "0"-"9"
	// USCORE   = %x5F ; underscore  ; "_"
	//
	// Examples:
	//
	// ?sort=+id,names{!common_name,id}
	// ?sort=id&sort=names{-common_name,id}; affected as above
	//
	// Invalid:
	// ?sort=+id,!names{-common_name,id}; illegal "!"; (nested only) fields MAY be sorted
	//
	// If false - regular GET fields specification mode is used.
	Sorting bool
}

FieldExpansion syntax options.

func NewFieldExpansion 

func NewFieldExpansion(options ...FieldEncoding) (syntax FieldExpansion)

type FieldsQ 

type FieldsQ []*Query

Fields[Q]uery represents a set of query{ fields }.

func ParseFields 

func ParseFields(s string, decode ...FieldEncoding) (fields FieldsQ, err error)

ParseFields decodes ?fields=name[.query([args..]),..][{nested,..}][,..] string specification.

func ParseFieldsQuery 

func ParseFieldsQuery(vs []string, decode ...FieldEncoding) (fields FieldsQ, err error)

ParseFieldsQuery acts like ParseFields method, but decodes ?fields=[&fields=] query specification.

func (*FieldsQ) Add 

func (vs *FieldsQ) Add(out Query) bool

func (FieldsQ) Clone 

func (vs FieldsQ) Clone() FieldsQ

func (FieldsQ) Encode 

func (fs FieldsQ) Encode(syntax ...FieldEncoding) (text []byte, err error)

func (FieldsQ) Fields 

func (req FieldsQ) Fields() []string

Fields returns set of FieldQ.Name

func (FieldsQ) Get 

func (vs FieldsQ) Get(name string) *Query

<nil>: NOT FOUND

func (FieldsQ) Has 

func (vs FieldsQ) Has(name string) bool

func (FieldsQ) Index 

func (req FieldsQ) Index(name string) int

-1: NOT FOUND

func (FieldsQ) MarshalText 

func (fs FieldsQ) MarshalText() ([]byte, error)

func (*FieldsQ) Parse 

func (fs *FieldsQ) Parse(s string, decode ...FieldEncoding) error

func (*FieldsQ) ParseQuery 

func (fs *FieldsQ) ParseQuery(vs []string, decode ...FieldEncoding) error

func (FieldsQ) String 

func (fs FieldsQ) String() string

type Input 

type Input interface {
	// String type name
	GoString() string
	// Decode input data source value
	InputValue(src any) (any, error)
}

Input Type interface

type InputArgs 

type InputArgs map[string]Argument

InputArgs maps argument name to it's input type

func (InputArgs) Add 

func (vs InputArgs) Add(reg Argument) (err error)

[option]: control [isDefault]: means option.Value(nil) returns default value [isMandatory]: means this option MUST be always [re]assigned with it's default value func (list *OptionList) Add(option Option, isDefault, isMandatory bool) error {

func (InputArgs) Args 

func (vs InputArgs) Args() []string

func (InputArgs) Get 

func (vs InputArgs) Get(name string) *Argument

func (InputArgs) Has 

func (vs InputArgs) Has(name string) bool

func (InputArgs) Len 

func (vs InputArgs) Len() int

func (InputArgs) Parse 

func (vs InputArgs) Parse(req *Query) error

Parse req.Query options

type InputPage 

type InputPage uint32

Input type of the list (page:uint32)

func (InputPage) GoString 

func (c InputPage) GoString() string

func (InputPage) InputValue 

func (c InputPage) InputValue(src any) (set any, err error)

Value always return uint32 value; Default: 1.

type InputSize 

type InputSize struct {
	Minimum, Maximum, Default int32
}

Input type of the list (size:int32)

func (InputSize) GoString 

func (c InputSize) GoString() string

func (InputSize) InputValue 

func (c InputSize) InputValue(src any) (set any, err error)

Value returns `set` value of $int32; Zero(0) - stands for default value; Negative(-1) - no limit; fetch all; Positive(+1) - regular value;

type InputSort 

type InputSort []string

Input type of the list (sort:$[-!+]field[{nested,..}],..)

func (InputSort) GoString 

func (c InputSort) GoString() string

func (InputSort) InputValue 

func (c InputSort) InputValue(src any) (set any, err error)

type Metadata 

type Metadata struct {
	// Name of the Object
	Name string `json:"name"`
	// Type of the Output data
	Type string `json:"typeOf"`
	// OPTIONAL. Input Arguments supported
	Args InputArgs `json:"input,omitempty"`
	// OPTIONAL. Output Fields of the Object Type
	Fields []*Metadata `json:"fields,omitempty"`
	// OPTIONAL. Default set of output Fields; expansion of ('*')
	Default []string `json:"output,omitempty"`
	// Resolve Output data or an error.
	Resolve OutputFunc `json:"-"`
}

GraphQL Metadata about an Object.

func (*Metadata) FieldQ 

func (md *Metadata) FieldQ(req *Query, syntax ...FieldEncoding) error

GetQuery validates and normalize given `req` FieldQ of this Metadata configuration.

func (*Metadata) FieldsQ 

func (md *Metadata) FieldsQ(req *FieldsQ, syntax ...FieldEncoding) error

FieldsQ presets ( validate & normalize & defaults ) given FieldsQ `req` according to this `md` Metadata.Fields and optional `syntax` options configuration.

func (*Metadata) GetField 

func (md *Metadata) GetField(name string) *Metadata

FieldsQ validates and normalize given `fs` query fields

func (*Metadata) ParseFields 

func (md *Metadata) ParseFields(vs []string, decode ...FieldEncoding) (fields FieldsQ, err error)

ParseFields decodes ?fields=[&fields=] query value(s) spec. Validate & normalize expansion due to `md`.Fields configuration.

type NotNull 

type NotNull struct {
	TypeOf Input
}

func (NotNull) GoString 

func (c NotNull) GoString() string

func (NotNull) InputValue 

func (c NotNull) InputValue(src any) (any, error)

type OutputFunc 

type OutputFunc func(output *ResolveArgs) (data any, err error)

OutputFunc must resolve Node-* related data for output

type Query 

type Query struct {
	// REQUIRED. Name of the Query Object for output.
	Name string
	// OPTIONAL. Input arguments of the Query.
	Args
	// OPTIONAL. Nested Fields of the Query Object.
	Fields FieldsQ
}

Field[Q]uery

func ParseFieldQ 

func ParseFieldQ(s string) (Query, error)

ParseFieldQ parse single field

func (*Query) Clone 

func (req *Query) Clone() *Query

func (*Query) Encode 

func (fd *Query) Encode(syntax ...FieldEncoding) (text []byte, err error)

func (*Query) MarshalText 

func (req *Query) MarshalText() ([]byte, error)

func (*Query) String 

func (req *Query) String() string

type ResolveArgs 

type ResolveArgs struct {
	// Node to output
	Node any
	// Query of the Node
	*Query
	// Context bindings
	context.Context
}

ResolveArgs Context

type String 

type String string

String Input Type

func (String) GoString 

func (String) GoString() string

func (String) InputValue 

func (c String) InputValue(src any) (set any, err error)

Source Files

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