ka/ent/gql_pagination.go

// Code generated by ent, DO NOT EDIT.

package ent

import (
	"context"
	"errors"
	"fmt"
	"io"
	"strconv"

	"code.icod.de/dalu/ka/ent/category"
	"code.icod.de/dalu/ka/ent/post"
	"code.icod.de/dalu/ka/ent/profile"
	"entgo.io/contrib/entgql"
	"entgo.io/ent"
	"entgo.io/ent/dialect/sql"
	"github.com/99designs/gqlgen/graphql"
	"github.com/99designs/gqlgen/graphql/errcode"
	"github.com/google/uuid"
	"github.com/vektah/gqlparser/v2/gqlerror"
)

// Common entgql types.
type (
	Cursor         = entgql.Cursor[uuid.UUID]
	PageInfo       = entgql.PageInfo[uuid.UUID]
	OrderDirection = entgql.OrderDirection
)

func orderFunc(o OrderDirection, field string) func(*sql.Selector) {
	if o == entgql.OrderDirectionDesc {
		return Desc(field)
	}
	return Asc(field)
}

const errInvalidPagination = "INVALID_PAGINATION"

func validateFirstLast(first, last *int) (err *gqlerror.Error) {
	switch {
	case first != nil && last != nil:
		err = &gqlerror.Error{
			Message: "Passing both `first` and `last` to paginate a connection is not supported.",
		}
	case first != nil && *first < 0:
		err = &gqlerror.Error{
			Message: "`first` on a connection cannot be less than zero.",
		}
		errcode.Set(err, errInvalidPagination)
	case last != nil && *last < 0:
		err = &gqlerror.Error{
			Message: "`last` on a connection cannot be less than zero.",
		}
		errcode.Set(err, errInvalidPagination)
	}
	return err
}

func collectedField(ctx context.Context, path ...string) *graphql.CollectedField {
	fc := graphql.GetFieldContext(ctx)
	if fc == nil {
		return nil
	}
	field := fc.Field
	oc := graphql.GetOperationContext(ctx)
walk:
	for _, name := range path {
		for _, f := range graphql.CollectFields(oc, field.Selections, nil) {
			if f.Alias == name {
				field = f
				continue walk
			}
		}
		return nil
	}
	return &field
}

func hasCollectedField(ctx context.Context, path ...string) bool {
	if graphql.GetFieldContext(ctx) == nil {
		return true
	}
	return collectedField(ctx, path...) != nil
}

const (
	edgesField      = "edges"
	nodeField       = "node"
	pageInfoField   = "pageInfo"
	totalCountField = "totalCount"
)

func paginateLimit(first, last *int) int {
	var limit int
	if first != nil {
		limit = *first + 1
	} else if last != nil {
		limit = *last + 1
	}
	return limit
}

// CategoryEdge is the edge representation of Category.
type CategoryEdge struct {
	Node   *Category `json:"node"`
	Cursor Cursor    `json:"cursor"`
}

// CategoryConnection is the connection containing edges to Category.
type CategoryConnection struct {
	Edges      []*CategoryEdge `json:"edges"`
	PageInfo   PageInfo        `json:"pageInfo"`
	TotalCount int             `json:"totalCount"`
}

func (c *CategoryConnection) build(nodes []*Category, pager *categoryPager, after *Cursor, first *int, before *Cursor, last *int) {
	c.PageInfo.HasNextPage = before != nil
	c.PageInfo.HasPreviousPage = after != nil
	if first != nil && *first+1 == len(nodes) {
		c.PageInfo.HasNextPage = true
		nodes = nodes[:len(nodes)-1]
	} else if last != nil && *last+1 == len(nodes) {
		c.PageInfo.HasPreviousPage = true
		nodes = nodes[:len(nodes)-1]
	}
	var nodeAt func(int) *Category
	if last != nil {
		n := len(nodes) - 1
		nodeAt = func(i int) *Category {
			return nodes[n-i]
		}
	} else {
		nodeAt = func(i int) *Category {
			return nodes[i]
		}
	}
	c.Edges = make([]*CategoryEdge, len(nodes))
	for i := range nodes {
		node := nodeAt(i)
		c.Edges[i] = &CategoryEdge{
			Node:   node,
			Cursor: pager.toCursor(node),
		}
	}
	if l := len(c.Edges); l > 0 {
		c.PageInfo.StartCursor = &c.Edges[0].Cursor
		c.PageInfo.EndCursor = &c.Edges[l-1].Cursor
	}
	if c.TotalCount == 0 {
		c.TotalCount = len(nodes)
	}
}

// CategoryPaginateOption enables pagination customization.
type CategoryPaginateOption func(*categoryPager) error

// WithCategoryOrder configures pagination ordering.
func WithCategoryOrder(order *CategoryOrder) CategoryPaginateOption {
	if order == nil {
		order = DefaultCategoryOrder
	}
	o := *order
	return func(pager *categoryPager) error {
		if err := o.Direction.Validate(); err != nil {
			return err
		}
		if o.Field == nil {
			o.Field = DefaultCategoryOrder.Field
		}
		pager.order = &o
		return nil
	}
}

// WithCategoryFilter configures pagination filter.
func WithCategoryFilter(filter func(*CategoryQuery) (*CategoryQuery, error)) CategoryPaginateOption {
	return func(pager *categoryPager) error {
		if filter == nil {
			return errors.New("CategoryQuery filter cannot be nil")
		}
		pager.filter = filter
		return nil
	}
}

type categoryPager struct {
	reverse bool
	order   *CategoryOrder
	filter  func(*CategoryQuery) (*CategoryQuery, error)
}

func newCategoryPager(opts []CategoryPaginateOption, reverse bool) (*categoryPager, error) {
	pager := &categoryPager{reverse: reverse}
	for _, opt := range opts {
		if err := opt(pager); err != nil {
			return nil, err
		}
	}
	if pager.order == nil {
		pager.order = DefaultCategoryOrder
	}
	return pager, nil
}

func (p *categoryPager) applyFilter(query *CategoryQuery) (*CategoryQuery, error) {
	if p.filter != nil {
		return p.filter(query)
	}
	return query, nil
}

func (p *categoryPager) toCursor(c *Category) Cursor {
	return p.order.Field.toCursor(c)
}

func (p *categoryPager) applyCursors(query *CategoryQuery, after, before *Cursor) (*CategoryQuery, error) {
	direction := p.order.Direction
	if p.reverse {
		direction = direction.Reverse()
	}
	for _, predicate := range entgql.CursorsPredicate(after, before, DefaultCategoryOrder.Field.column, p.order.Field.column, direction) {
		query = query.Where(predicate)
	}
	return query, nil
}

func (p *categoryPager) applyOrder(query *CategoryQuery) *CategoryQuery {
	direction := p.order.Direction
	if p.reverse {
		direction = direction.Reverse()
	}
	query = query.Order(p.order.Field.toTerm(direction.OrderTermOption()))
	if p.order.Field != DefaultCategoryOrder.Field {
		query = query.Order(DefaultCategoryOrder.Field.toTerm(direction.OrderTermOption()))
	}
	switch p.order.Field.column {
	case CategoryOrderFieldPostsCount.column:
	default:
		if len(query.ctx.Fields) > 0 {
			query.ctx.AppendFieldOnce(p.order.Field.column)
		}
	}
	return query
}

func (p *categoryPager) orderExpr(query *CategoryQuery) sql.Querier {
	direction := p.order.Direction
	if p.reverse {
		direction = direction.Reverse()
	}
	switch p.order.Field.column {
	case CategoryOrderFieldPostsCount.column:
		query = query.Order(p.order.Field.toTerm(direction.OrderTermOption()))
	default:
		if len(query.ctx.Fields) > 0 {
			query.ctx.AppendFieldOnce(p.order.Field.column)
		}
	}
	return sql.ExprFunc(func(b *sql.Builder) {
		b.Ident(p.order.Field.column).Pad().WriteString(string(direction))
		if p.order.Field != DefaultCategoryOrder.Field {
			b.Comma().Ident(DefaultCategoryOrder.Field.column).Pad().WriteString(string(direction))
		}
	})
}

// Paginate executes the query and returns a relay based cursor connection to Category.
func (c *CategoryQuery) Paginate(
	ctx context.Context, after *Cursor, first *int,
	before *Cursor, last *int, opts ...CategoryPaginateOption,
) (*CategoryConnection, error) {
	if err := validateFirstLast(first, last); err != nil {
		return nil, err
	}
	pager, err := newCategoryPager(opts, last != nil)
	if err != nil {
		return nil, err
	}
	if c, err = pager.applyFilter(c); err != nil {
		return nil, err
	}
	conn := &CategoryConnection{Edges: []*CategoryEdge{}}
	ignoredEdges := !hasCollectedField(ctx, edgesField)
	if hasCollectedField(ctx, totalCountField) || hasCollectedField(ctx, pageInfoField) {
		hasPagination := after != nil || first != nil || before != nil || last != nil
		if hasPagination || ignoredEdges {
			c := c.Clone()
			c.ctx.Fields = nil
			if conn.TotalCount, err = c.Count(ctx); err != nil {
				return nil, err
			}
			conn.PageInfo.HasNextPage = first != nil && conn.TotalCount > 0
			conn.PageInfo.HasPreviousPage = last != nil && conn.TotalCount > 0
		}
	}
	if ignoredEdges || (first != nil && *first == 0) || (last != nil && *last == 0) {
		return conn, nil
	}
	if c, err = pager.applyCursors(c, after, before); err != nil {
		return nil, err
	}
	limit := paginateLimit(first, last)
	if limit != 0 {
		c.Limit(limit)
	}
	if field := collectedField(ctx, edgesField, nodeField); field != nil {
		if err := c.collectField(ctx, limit == 1, graphql.GetOperationContext(ctx), *field, []string{edgesField, nodeField}); err != nil {
			return nil, err
		}
	}
	c = pager.applyOrder(c)
	nodes, err := c.All(ctx)
	if err != nil {
		return nil, err
	}
	conn.build(nodes, pager, after, first, before, last)
	return conn, nil
}

var (
	// CategoryOrderFieldCreatedAt orders Category by created_at.
	CategoryOrderFieldCreatedAt = &CategoryOrderField{
		Value: func(c *Category) (ent.Value, error) {
			return c.CreatedAt, nil
		},
		column: category.FieldCreatedAt,
		toTerm: category.ByCreatedAt,
		toCursor: func(c *Category) Cursor {
			return Cursor{
				ID:    c.ID,
				Value: c.CreatedAt,
			}
		},
	}
	// CategoryOrderFieldUpdatedAt orders Category by updated_at.
	CategoryOrderFieldUpdatedAt = &CategoryOrderField{
		Value: func(c *Category) (ent.Value, error) {
			return c.UpdatedAt, nil
		},
		column: category.FieldUpdatedAt,
		toTerm: category.ByUpdatedAt,
		toCursor: func(c *Category) Cursor {
			return Cursor{
				ID:    c.ID,
				Value: c.UpdatedAt,
			}
		},
	}
	// CategoryOrderFieldPostsCount orders by POSTS_COUNT.
	CategoryOrderFieldPostsCount = &CategoryOrderField{
		Value: func(c *Category) (ent.Value, error) {
			return c.Value("posts_count")
		},
		column: "posts_count",
		toTerm: func(opts ...sql.OrderTermOption) category.OrderOption {
			return category.ByPostsCount(
				append(opts, sql.OrderSelectAs("posts_count"))...,
			)
		},
		toCursor: func(c *Category) Cursor {
			cv, _ := c.Value("posts_count")
			return Cursor{
				ID:    c.ID,
				Value: cv,
			}
		},
	}
)

// String implement fmt.Stringer interface.
func (f CategoryOrderField) String() string {
	var str string
	switch f.column {
	case CategoryOrderFieldCreatedAt.column:
		str = "CREATED_AT"
	case CategoryOrderFieldUpdatedAt.column:
		str = "UPDATED_AT"
	case CategoryOrderFieldPostsCount.column:
		str = "POSTS_COUNT"
	}
	return str
}

// MarshalGQL implements graphql.Marshaler interface.
func (f CategoryOrderField) MarshalGQL(w io.Writer) {
	io.WriteString(w, strconv.Quote(f.String()))
}

// UnmarshalGQL implements graphql.Unmarshaler interface.
func (f *CategoryOrderField) UnmarshalGQL(v interface{}) error {
	str, ok := v.(string)
	if !ok {
		return fmt.Errorf("CategoryOrderField %T must be a string", v)
	}
	switch str {
	case "CREATED_AT":
		*f = *CategoryOrderFieldCreatedAt
	case "UPDATED_AT":
		*f = *CategoryOrderFieldUpdatedAt
	case "POSTS_COUNT":
		*f = *CategoryOrderFieldPostsCount
	default:
		return fmt.Errorf("%s is not a valid CategoryOrderField", str)
	}
	return nil
}

// CategoryOrderField defines the ordering field of Category.
type CategoryOrderField struct {
	// Value extracts the ordering value from the given Category.
	Value    func(*Category) (ent.Value, error)
	column   string // field or computed.
	toTerm   func(...sql.OrderTermOption) category.OrderOption
	toCursor func(*Category) Cursor
}

// CategoryOrder defines the ordering of Category.
type CategoryOrder struct {
	Direction OrderDirection      `json:"direction"`
	Field     *CategoryOrderField `json:"field"`
}

// DefaultCategoryOrder is the default ordering of Category.
var DefaultCategoryOrder = &CategoryOrder{
	Direction: entgql.OrderDirectionAsc,
	Field: &CategoryOrderField{
		Value: func(c *Category) (ent.Value, error) {
			return c.ID, nil
		},
		column: category.FieldID,
		toTerm: category.ByID,
		toCursor: func(c *Category) Cursor {
			return Cursor{ID: c.ID}
		},
	},
}

// ToEdge converts Category into CategoryEdge.
func (c *Category) ToEdge(order *CategoryOrder) *CategoryEdge {
	if order == nil {
		order = DefaultCategoryOrder
	}
	return &CategoryEdge{
		Node:   c,
		Cursor: order.Field.toCursor(c),
	}
}

// PostEdge is the edge representation of Post.
type PostEdge struct {
	Node   *Post  `json:"node"`
	Cursor Cursor `json:"cursor"`
}

// PostConnection is the connection containing edges to Post.
type PostConnection struct {
	Edges      []*PostEdge `json:"edges"`
	PageInfo   PageInfo    `json:"pageInfo"`
	TotalCount int         `json:"totalCount"`
}

func (c *PostConnection) build(nodes []*Post, pager *postPager, after *Cursor, first *int, before *Cursor, last *int) {
	c.PageInfo.HasNextPage = before != nil
	c.PageInfo.HasPreviousPage = after != nil
	if first != nil && *first+1 == len(nodes) {
		c.PageInfo.HasNextPage = true
		nodes = nodes[:len(nodes)-1]
	} else if last != nil && *last+1 == len(nodes) {
		c.PageInfo.HasPreviousPage = true
		nodes = nodes[:len(nodes)-1]
	}
	var nodeAt func(int) *Post
	if last != nil {
		n := len(nodes) - 1
		nodeAt = func(i int) *Post {
			return nodes[n-i]
		}
	} else {
		nodeAt = func(i int) *Post {
			return nodes[i]
		}
	}
	c.Edges = make([]*PostEdge, len(nodes))
	for i := range nodes {
		node := nodeAt(i)
		c.Edges[i] = &PostEdge{
			Node:   node,
			Cursor: pager.toCursor(node),
		}
	}
	if l := len(c.Edges); l > 0 {
		c.PageInfo.StartCursor = &c.Edges[0].Cursor
		c.PageInfo.EndCursor = &c.Edges[l-1].Cursor
	}
	if c.TotalCount == 0 {
		c.TotalCount = len(nodes)
	}
}

// PostPaginateOption enables pagination customization.
type PostPaginateOption func(*postPager) error

// WithPostOrder configures pagination ordering.
func WithPostOrder(order *PostOrder) PostPaginateOption {
	if order == nil {
		order = DefaultPostOrder
	}
	o := *order
	return func(pager *postPager) error {
		if err := o.Direction.Validate(); err != nil {
			return err
		}
		if o.Field == nil {
			o.Field = DefaultPostOrder.Field
		}
		pager.order = &o
		return nil
	}
}

// WithPostFilter configures pagination filter.
func WithPostFilter(filter func(*PostQuery) (*PostQuery, error)) PostPaginateOption {
	return func(pager *postPager) error {
		if filter == nil {
			return errors.New("PostQuery filter cannot be nil")
		}
		pager.filter = filter
		return nil
	}
}

type postPager struct {
	reverse bool
	order   *PostOrder
	filter  func(*PostQuery) (*PostQuery, error)
}

func newPostPager(opts []PostPaginateOption, reverse bool) (*postPager, error) {
	pager := &postPager{reverse: reverse}
	for _, opt := range opts {
		if err := opt(pager); err != nil {
			return nil, err
		}
	}
	if pager.order == nil {
		pager.order = DefaultPostOrder
	}
	return pager, nil
}

func (p *postPager) applyFilter(query *PostQuery) (*PostQuery, error) {
	if p.filter != nil {
		return p.filter(query)
	}
	return query, nil
}

func (p *postPager) toCursor(po *Post) Cursor {
	return p.order.Field.toCursor(po)
}

func (p *postPager) applyCursors(query *PostQuery, after, before *Cursor) (*PostQuery, error) {
	direction := p.order.Direction
	if p.reverse {
		direction = direction.Reverse()
	}
	for _, predicate := range entgql.CursorsPredicate(after, before, DefaultPostOrder.Field.column, p.order.Field.column, direction) {
		query = query.Where(predicate)
	}
	return query, nil
}

func (p *postPager) applyOrder(query *PostQuery) *PostQuery {
	direction := p.order.Direction
	if p.reverse {
		direction = direction.Reverse()
	}
	query = query.Order(p.order.Field.toTerm(direction.OrderTermOption()))
	if p.order.Field != DefaultPostOrder.Field {
		query = query.Order(DefaultPostOrder.Field.toTerm(direction.OrderTermOption()))
	}
	if len(query.ctx.Fields) > 0 {
		query.ctx.AppendFieldOnce(p.order.Field.column)
	}
	return query
}

func (p *postPager) orderExpr(query *PostQuery) sql.Querier {
	direction := p.order.Direction
	if p.reverse {
		direction = direction.Reverse()
	}
	if len(query.ctx.Fields) > 0 {
		query.ctx.AppendFieldOnce(p.order.Field.column)
	}
	return sql.ExprFunc(func(b *sql.Builder) {
		b.Ident(p.order.Field.column).Pad().WriteString(string(direction))
		if p.order.Field != DefaultPostOrder.Field {
			b.Comma().Ident(DefaultPostOrder.Field.column).Pad().WriteString(string(direction))
		}
	})
}

// Paginate executes the query and returns a relay based cursor connection to Post.
func (po *PostQuery) Paginate(
	ctx context.Context, after *Cursor, first *int,
	before *Cursor, last *int, opts ...PostPaginateOption,
) (*PostConnection, error) {
	if err := validateFirstLast(first, last); err != nil {
		return nil, err
	}
	pager, err := newPostPager(opts, last != nil)
	if err != nil {
		return nil, err
	}
	if po, err = pager.applyFilter(po); err != nil {
		return nil, err
	}
	conn := &PostConnection{Edges: []*PostEdge{}}
	ignoredEdges := !hasCollectedField(ctx, edgesField)
	if hasCollectedField(ctx, totalCountField) || hasCollectedField(ctx, pageInfoField) {
		hasPagination := after != nil || first != nil || before != nil || last != nil
		if hasPagination || ignoredEdges {
			c := po.Clone()
			c.ctx.Fields = nil
			if conn.TotalCount, err = c.Count(ctx); err != nil {
				return nil, err
			}
			conn.PageInfo.HasNextPage = first != nil && conn.TotalCount > 0
			conn.PageInfo.HasPreviousPage = last != nil && conn.TotalCount > 0
		}
	}
	if ignoredEdges || (first != nil && *first == 0) || (last != nil && *last == 0) {
		return conn, nil
	}
	if po, err = pager.applyCursors(po, after, before); err != nil {
		return nil, err
	}
	limit := paginateLimit(first, last)
	if limit != 0 {
		po.Limit(limit)
	}
	if field := collectedField(ctx, edgesField, nodeField); field != nil {
		if err := po.collectField(ctx, limit == 1, graphql.GetOperationContext(ctx), *field, []string{edgesField, nodeField}); err != nil {
			return nil, err
		}
	}
	po = pager.applyOrder(po)
	nodes, err := po.All(ctx)
	if err != nil {
		return nil, err
	}
	conn.build(nodes, pager, after, first, before, last)
	return conn, nil
}

var (
	// PostOrderFieldCreatedAt orders Post by created_at.
	PostOrderFieldCreatedAt = &PostOrderField{
		Value: func(po *Post) (ent.Value, error) {
			return po.CreatedAt, nil
		},
		column: post.FieldCreatedAt,
		toTerm: post.ByCreatedAt,
		toCursor: func(po *Post) Cursor {
			return Cursor{
				ID:    po.ID,
				Value: po.CreatedAt,
			}
		},
	}
	// PostOrderFieldUpdatedAt orders Post by updated_at.
	PostOrderFieldUpdatedAt = &PostOrderField{
		Value: func(po *Post) (ent.Value, error) {
			return po.UpdatedAt, nil
		},
		column: post.FieldUpdatedAt,
		toTerm: post.ByUpdatedAt,
		toCursor: func(po *Post) Cursor {
			return Cursor{
				ID:    po.ID,
				Value: po.UpdatedAt,
			}
		},
	}
	// PostOrderFieldExpireTime orders Post by expire_time.
	PostOrderFieldExpireTime = &PostOrderField{
		Value: func(po *Post) (ent.Value, error) {
			return po.ExpireTime, nil
		},
		column: post.FieldExpireTime,
		toTerm: post.ByExpireTime,
		toCursor: func(po *Post) Cursor {
			return Cursor{
				ID:    po.ID,
				Value: po.ExpireTime,
			}
		},
	}
)

// String implement fmt.Stringer interface.
func (f PostOrderField) String() string {
	var str string
	switch f.column {
	case PostOrderFieldCreatedAt.column:
		str = "CREATED_AT"
	case PostOrderFieldUpdatedAt.column:
		str = "UPDATED_AT"
	case PostOrderFieldExpireTime.column:
		str = "EXPIRE_TIME"
	}
	return str
}

// MarshalGQL implements graphql.Marshaler interface.
func (f PostOrderField) MarshalGQL(w io.Writer) {
	io.WriteString(w, strconv.Quote(f.String()))
}

// UnmarshalGQL implements graphql.Unmarshaler interface.
func (f *PostOrderField) UnmarshalGQL(v interface{}) error {
	str, ok := v.(string)
	if !ok {
		return fmt.Errorf("PostOrderField %T must be a string", v)
	}
	switch str {
	case "CREATED_AT":
		*f = *PostOrderFieldCreatedAt
	case "UPDATED_AT":
		*f = *PostOrderFieldUpdatedAt
	case "EXPIRE_TIME":
		*f = *PostOrderFieldExpireTime
	default:
		return fmt.Errorf("%s is not a valid PostOrderField", str)
	}
	return nil
}

// PostOrderField defines the ordering field of Post.
type PostOrderField struct {
	// Value extracts the ordering value from the given Post.
	Value    func(*Post) (ent.Value, error)
	column   string // field or computed.
	toTerm   func(...sql.OrderTermOption) post.OrderOption
	toCursor func(*Post) Cursor
}

// PostOrder defines the ordering of Post.
type PostOrder struct {
	Direction OrderDirection  `json:"direction"`
	Field     *PostOrderField `json:"field"`
}

// DefaultPostOrder is the default ordering of Post.
var DefaultPostOrder = &PostOrder{
	Direction: entgql.OrderDirectionAsc,
	Field: &PostOrderField{
		Value: func(po *Post) (ent.Value, error) {
			return po.ID, nil
		},
		column: post.FieldID,
		toTerm: post.ByID,
		toCursor: func(po *Post) Cursor {
			return Cursor{ID: po.ID}
		},
	},
}

// ToEdge converts Post into PostEdge.
func (po *Post) ToEdge(order *PostOrder) *PostEdge {
	if order == nil {
		order = DefaultPostOrder
	}
	return &PostEdge{
		Node:   po,
		Cursor: order.Field.toCursor(po),
	}
}

// ProfileEdge is the edge representation of Profile.
type ProfileEdge struct {
	Node   *Profile `json:"node"`
	Cursor Cursor   `json:"cursor"`
}

// ProfileConnection is the connection containing edges to Profile.
type ProfileConnection struct {
	Edges      []*ProfileEdge `json:"edges"`
	PageInfo   PageInfo       `json:"pageInfo"`
	TotalCount int            `json:"totalCount"`
}

func (c *ProfileConnection) build(nodes []*Profile, pager *profilePager, after *Cursor, first *int, before *Cursor, last *int) {
	c.PageInfo.HasNextPage = before != nil
	c.PageInfo.HasPreviousPage = after != nil
	if first != nil && *first+1 == len(nodes) {
		c.PageInfo.HasNextPage = true
		nodes = nodes[:len(nodes)-1]
	} else if last != nil && *last+1 == len(nodes) {
		c.PageInfo.HasPreviousPage = true
		nodes = nodes[:len(nodes)-1]
	}
	var nodeAt func(int) *Profile
	if last != nil {
		n := len(nodes) - 1
		nodeAt = func(i int) *Profile {
			return nodes[n-i]
		}
	} else {
		nodeAt = func(i int) *Profile {
			return nodes[i]
		}
	}
	c.Edges = make([]*ProfileEdge, len(nodes))
	for i := range nodes {
		node := nodeAt(i)
		c.Edges[i] = &ProfileEdge{
			Node:   node,
			Cursor: pager.toCursor(node),
		}
	}
	if l := len(c.Edges); l > 0 {
		c.PageInfo.StartCursor = &c.Edges[0].Cursor
		c.PageInfo.EndCursor = &c.Edges[l-1].Cursor
	}
	if c.TotalCount == 0 {
		c.TotalCount = len(nodes)
	}
}

// ProfilePaginateOption enables pagination customization.
type ProfilePaginateOption func(*profilePager) error

// WithProfileOrder configures pagination ordering.
func WithProfileOrder(order *ProfileOrder) ProfilePaginateOption {
	if order == nil {
		order = DefaultProfileOrder
	}
	o := *order
	return func(pager *profilePager) error {
		if err := o.Direction.Validate(); err != nil {
			return err
		}
		if o.Field == nil {
			o.Field = DefaultProfileOrder.Field
		}
		pager.order = &o
		return nil
	}
}

// WithProfileFilter configures pagination filter.
func WithProfileFilter(filter func(*ProfileQuery) (*ProfileQuery, error)) ProfilePaginateOption {
	return func(pager *profilePager) error {
		if filter == nil {
			return errors.New("ProfileQuery filter cannot be nil")
		}
		pager.filter = filter
		return nil
	}
}

type profilePager struct {
	reverse bool
	order   *ProfileOrder
	filter  func(*ProfileQuery) (*ProfileQuery, error)
}

func newProfilePager(opts []ProfilePaginateOption, reverse bool) (*profilePager, error) {
	pager := &profilePager{reverse: reverse}
	for _, opt := range opts {
		if err := opt(pager); err != nil {
			return nil, err
		}
	}
	if pager.order == nil {
		pager.order = DefaultProfileOrder
	}
	return pager, nil
}

func (p *profilePager) applyFilter(query *ProfileQuery) (*ProfileQuery, error) {
	if p.filter != nil {
		return p.filter(query)
	}
	return query, nil
}

func (p *profilePager) toCursor(pr *Profile) Cursor {
	return p.order.Field.toCursor(pr)
}

func (p *profilePager) applyCursors(query *ProfileQuery, after, before *Cursor) (*ProfileQuery, error) {
	direction := p.order.Direction
	if p.reverse {
		direction = direction.Reverse()
	}
	for _, predicate := range entgql.CursorsPredicate(after, before, DefaultProfileOrder.Field.column, p.order.Field.column, direction) {
		query = query.Where(predicate)
	}
	return query, nil
}

func (p *profilePager) applyOrder(query *ProfileQuery) *ProfileQuery {
	direction := p.order.Direction
	if p.reverse {
		direction = direction.Reverse()
	}
	query = query.Order(p.order.Field.toTerm(direction.OrderTermOption()))
	if p.order.Field != DefaultProfileOrder.Field {
		query = query.Order(DefaultProfileOrder.Field.toTerm(direction.OrderTermOption()))
	}
	switch p.order.Field.column {
	case ProfileOrderFieldPostsCount.column:
	default:
		if len(query.ctx.Fields) > 0 {
			query.ctx.AppendFieldOnce(p.order.Field.column)
		}
	}
	return query
}

func (p *profilePager) orderExpr(query *ProfileQuery) sql.Querier {
	direction := p.order.Direction
	if p.reverse {
		direction = direction.Reverse()
	}
	switch p.order.Field.column {
	case ProfileOrderFieldPostsCount.column:
		query = query.Order(p.order.Field.toTerm(direction.OrderTermOption()))
	default:
		if len(query.ctx.Fields) > 0 {
			query.ctx.AppendFieldOnce(p.order.Field.column)
		}
	}
	return sql.ExprFunc(func(b *sql.Builder) {
		b.Ident(p.order.Field.column).Pad().WriteString(string(direction))
		if p.order.Field != DefaultProfileOrder.Field {
			b.Comma().Ident(DefaultProfileOrder.Field.column).Pad().WriteString(string(direction))
		}
	})
}

// Paginate executes the query and returns a relay based cursor connection to Profile.
func (pr *ProfileQuery) Paginate(
	ctx context.Context, after *Cursor, first *int,
	before *Cursor, last *int, opts ...ProfilePaginateOption,
) (*ProfileConnection, error) {
	if err := validateFirstLast(first, last); err != nil {
		return nil, err
	}
	pager, err := newProfilePager(opts, last != nil)
	if err != nil {
		return nil, err
	}
	if pr, err = pager.applyFilter(pr); err != nil {
		return nil, err
	}
	conn := &ProfileConnection{Edges: []*ProfileEdge{}}
	ignoredEdges := !hasCollectedField(ctx, edgesField)
	if hasCollectedField(ctx, totalCountField) || hasCollectedField(ctx, pageInfoField) {
		hasPagination := after != nil || first != nil || before != nil || last != nil
		if hasPagination || ignoredEdges {
			c := pr.Clone()
			c.ctx.Fields = nil
			if conn.TotalCount, err = c.Count(ctx); err != nil {
				return nil, err
			}
			conn.PageInfo.HasNextPage = first != nil && conn.TotalCount > 0
			conn.PageInfo.HasPreviousPage = last != nil && conn.TotalCount > 0
		}
	}
	if ignoredEdges || (first != nil && *first == 0) || (last != nil && *last == 0) {
		return conn, nil
	}
	if pr, err = pager.applyCursors(pr, after, before); err != nil {
		return nil, err
	}
	limit := paginateLimit(first, last)
	if limit != 0 {
		pr.Limit(limit)
	}
	if field := collectedField(ctx, edgesField, nodeField); field != nil {
		if err := pr.collectField(ctx, limit == 1, graphql.GetOperationContext(ctx), *field, []string{edgesField, nodeField}); err != nil {
			return nil, err
		}
	}
	pr = pager.applyOrder(pr)
	nodes, err := pr.All(ctx)
	if err != nil {
		return nil, err
	}
	conn.build(nodes, pager, after, first, before, last)
	return conn, nil
}

var (
	// ProfileOrderFieldCreatedAt orders Profile by created_at.
	ProfileOrderFieldCreatedAt = &ProfileOrderField{
		Value: func(pr *Profile) (ent.Value, error) {
			return pr.CreatedAt, nil
		},
		column: profile.FieldCreatedAt,
		toTerm: profile.ByCreatedAt,
		toCursor: func(pr *Profile) Cursor {
			return Cursor{
				ID:    pr.ID,
				Value: pr.CreatedAt,
			}
		},
	}
	// ProfileOrderFieldUpdatedAt orders Profile by updated_at.
	ProfileOrderFieldUpdatedAt = &ProfileOrderField{
		Value: func(pr *Profile) (ent.Value, error) {
			return pr.UpdatedAt, nil
		},
		column: profile.FieldUpdatedAt,
		toTerm: profile.ByUpdatedAt,
		toCursor: func(pr *Profile) Cursor {
			return Cursor{
				ID:    pr.ID,
				Value: pr.UpdatedAt,
			}
		},
	}
	// ProfileOrderFieldPostsCount orders by POSTS_COUNT.
	ProfileOrderFieldPostsCount = &ProfileOrderField{
		Value: func(pr *Profile) (ent.Value, error) {
			return pr.Value("posts_count")
		},
		column: "posts_count",
		toTerm: func(opts ...sql.OrderTermOption) profile.OrderOption {
			return profile.ByPostsCount(
				append(opts, sql.OrderSelectAs("posts_count"))...,
			)
		},
		toCursor: func(pr *Profile) Cursor {
			cv, _ := pr.Value("posts_count")
			return Cursor{
				ID:    pr.ID,
				Value: cv,
			}
		},
	}
)

// String implement fmt.Stringer interface.
func (f ProfileOrderField) String() string {
	var str string
	switch f.column {
	case ProfileOrderFieldCreatedAt.column:
		str = "CREATED_AT"
	case ProfileOrderFieldUpdatedAt.column:
		str = "UPDATED_AT"
	case ProfileOrderFieldPostsCount.column:
		str = "POSTS_COUNT"
	}
	return str
}

// MarshalGQL implements graphql.Marshaler interface.
func (f ProfileOrderField) MarshalGQL(w io.Writer) {
	io.WriteString(w, strconv.Quote(f.String()))
}

// UnmarshalGQL implements graphql.Unmarshaler interface.
func (f *ProfileOrderField) UnmarshalGQL(v interface{}) error {
	str, ok := v.(string)
	if !ok {
		return fmt.Errorf("ProfileOrderField %T must be a string", v)
	}
	switch str {
	case "CREATED_AT":
		*f = *ProfileOrderFieldCreatedAt
	case "UPDATED_AT":
		*f = *ProfileOrderFieldUpdatedAt
	case "POSTS_COUNT":
		*f = *ProfileOrderFieldPostsCount
	default:
		return fmt.Errorf("%s is not a valid ProfileOrderField", str)
	}
	return nil
}

// ProfileOrderField defines the ordering field of Profile.
type ProfileOrderField struct {
	// Value extracts the ordering value from the given Profile.
	Value    func(*Profile) (ent.Value, error)
	column   string // field or computed.
	toTerm   func(...sql.OrderTermOption) profile.OrderOption
	toCursor func(*Profile) Cursor
}

// ProfileOrder defines the ordering of Profile.
type ProfileOrder struct {
	Direction OrderDirection     `json:"direction"`
	Field     *ProfileOrderField `json:"field"`
}

// DefaultProfileOrder is the default ordering of Profile.
var DefaultProfileOrder = &ProfileOrder{
	Direction: entgql.OrderDirectionAsc,
	Field: &ProfileOrderField{
		Value: func(pr *Profile) (ent.Value, error) {
			return pr.ID, nil
		},
		column: profile.FieldID,
		toTerm: profile.ByID,
		toCursor: func(pr *Profile) Cursor {
			return Cursor{ID: pr.ID}
		},
	},
}

// ToEdge converts Profile into ProfileEdge.
func (pr *Profile) ToEdge(order *ProfileOrder) *ProfileEdge {
	if order == nil {
		order = DefaultProfileOrder
	}
	return &ProfileEdge{
		Node:   pr,
		Cursor: order.Field.toCursor(pr),
	}
}