dql

type Arg struct {
	Value      string
	IsValueVar bool // If argument is val(a), e.g. eq(name, val(a))
	IsDQLVar   bool
}

type FacetOrder struct {
	Key  string
	Desc bool // true if ordering should be decending by this facet.
}

type FilterTree struct {
	Op    string
	Child []*FilterTree
	Func  *Function
}

type Function struct {
	Attr       string
	Lang       string // language of the attribute value
	Name       string // Specifies the name of the function.
	Args       []Arg  // Contains the arguments of the function.
	UID        []uint64
	NeedsVar   []VarContext // If the function requires some variable
	IsCount    bool         // gt(count(friends),0)
	IsValueVar bool         // eq(val(s), 5)
	IsLenVar   bool         // eq(len(s), 5)
}

type GraphQuery struct {
	UID        []uint64
	Attr       string
	Langs      []string
	Alias      string
	IsCount    bool
	IsInternal bool
	IsGroupby  bool
	Var        string
	NeedsVar   []VarContext
	Func       *Function
	Expand     string // Which variable to expand with.

	Args map[string]string
	// Query can have multiple sort parameters.
	Order            []*pb.Order
	Children         []*GraphQuery
	Filter           *FilterTree
	MathExp          *MathTree
	Normalize        bool
	Recurse          bool
	RecurseArgs      RecurseArgs
	ShortestPathArgs ShortestPathArgs
	Cascade          []string
	IgnoreReflex     bool
	Facets           *pb.FacetParams
	FacetsFilter     *FilterTree
	GroupbyAttrs     []GroupByAttr
	FacetVar         map[string]string
	FacetsOrder      []*FacetOrder

	// Used for ACL enabled queries to curtail results to only accessible params
	AllowedPreds []string

	// True for blocks that don't have a starting function and hence no starting nodes. They are
	// used to aggregate and get variables defined in another block.
	IsEmpty bool
	// contains filtered or unexported fields
}

type GroupByAttr struct {
	Attr  string
	Alias string
	Langs []string
}

type MathTree struct {
	Fn    string
	Var   string
	Const types.Val // This will always be parsed as a float value
	Val   *types.ShardedMap
	Child []*MathTree
}

type Mutation struct {
	Cond         string
	Set          []*api.NQuad
	Del          []*api.NQuad
	AllowedPreds []string

	Metadata *pb.Metadata
}

type NQuad struct {
	*api.NQuad
}

type RecurseArgs struct {
	Depth     uint64
	AllowLoop bool
	// contains filtered or unexported fields
}

type Request struct {
	Str       string
	Variables map[string]string
}

type Result struct {
	Query     []*GraphQuery
	QueryVars []*Vars
	Schema    *pb.SchemaRequest
}

type ShortestPathArgs struct {
	// From, To can have a uid or a uid function as the argument.
	// 1. from: 0x01
	// 2. from: uid(0x01)
	// 3. from: uid(p) // a variable
	From *Function
	To   *Function
}

type VarContext struct {
	Name string
	Typ  int //  1 for UID vars, 2 for value vars
}

type Vars struct {
	Defines []string
	Needs   []string
}