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hook.go
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hook.go
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// Copyright 2019-present Facebook
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
// Code generated by entc, DO NOT EDIT.
package hook
import (
"context"
"fmt"
"entgo.io/contrib/entgql/internal/todo/ent"
)
// The BillProductFunc type is an adapter to allow the use of ordinary
// function as BillProduct mutator.
type BillProductFunc func(context.Context, *ent.BillProductMutation) (ent.Value, error)
// Mutate calls f(ctx, m).
func (f BillProductFunc) Mutate(ctx context.Context, m ent.Mutation) (ent.Value, error) {
if mv, ok := m.(*ent.BillProductMutation); ok {
return f(ctx, mv)
}
return nil, fmt.Errorf("unexpected mutation type %T. expect *ent.BillProductMutation", m)
}
// The CategoryFunc type is an adapter to allow the use of ordinary
// function as Category mutator.
type CategoryFunc func(context.Context, *ent.CategoryMutation) (ent.Value, error)
// Mutate calls f(ctx, m).
func (f CategoryFunc) Mutate(ctx context.Context, m ent.Mutation) (ent.Value, error) {
if mv, ok := m.(*ent.CategoryMutation); ok {
return f(ctx, mv)
}
return nil, fmt.Errorf("unexpected mutation type %T. expect *ent.CategoryMutation", m)
}
// The FriendshipFunc type is an adapter to allow the use of ordinary
// function as Friendship mutator.
type FriendshipFunc func(context.Context, *ent.FriendshipMutation) (ent.Value, error)
// Mutate calls f(ctx, m).
func (f FriendshipFunc) Mutate(ctx context.Context, m ent.Mutation) (ent.Value, error) {
if mv, ok := m.(*ent.FriendshipMutation); ok {
return f(ctx, mv)
}
return nil, fmt.Errorf("unexpected mutation type %T. expect *ent.FriendshipMutation", m)
}
// The GroupFunc type is an adapter to allow the use of ordinary
// function as Group mutator.
type GroupFunc func(context.Context, *ent.GroupMutation) (ent.Value, error)
// Mutate calls f(ctx, m).
func (f GroupFunc) Mutate(ctx context.Context, m ent.Mutation) (ent.Value, error) {
if mv, ok := m.(*ent.GroupMutation); ok {
return f(ctx, mv)
}
return nil, fmt.Errorf("unexpected mutation type %T. expect *ent.GroupMutation", m)
}
// The OneToManyFunc type is an adapter to allow the use of ordinary
// function as OneToMany mutator.
type OneToManyFunc func(context.Context, *ent.OneToManyMutation) (ent.Value, error)
// Mutate calls f(ctx, m).
func (f OneToManyFunc) Mutate(ctx context.Context, m ent.Mutation) (ent.Value, error) {
if mv, ok := m.(*ent.OneToManyMutation); ok {
return f(ctx, mv)
}
return nil, fmt.Errorf("unexpected mutation type %T. expect *ent.OneToManyMutation", m)
}
// The ProjectFunc type is an adapter to allow the use of ordinary
// function as Project mutator.
type ProjectFunc func(context.Context, *ent.ProjectMutation) (ent.Value, error)
// Mutate calls f(ctx, m).
func (f ProjectFunc) Mutate(ctx context.Context, m ent.Mutation) (ent.Value, error) {
if mv, ok := m.(*ent.ProjectMutation); ok {
return f(ctx, mv)
}
return nil, fmt.Errorf("unexpected mutation type %T. expect *ent.ProjectMutation", m)
}
// The TodoFunc type is an adapter to allow the use of ordinary
// function as Todo mutator.
type TodoFunc func(context.Context, *ent.TodoMutation) (ent.Value, error)
// Mutate calls f(ctx, m).
func (f TodoFunc) Mutate(ctx context.Context, m ent.Mutation) (ent.Value, error) {
if mv, ok := m.(*ent.TodoMutation); ok {
return f(ctx, mv)
}
return nil, fmt.Errorf("unexpected mutation type %T. expect *ent.TodoMutation", m)
}
// The UserFunc type is an adapter to allow the use of ordinary
// function as User mutator.
type UserFunc func(context.Context, *ent.UserMutation) (ent.Value, error)
// Mutate calls f(ctx, m).
func (f UserFunc) Mutate(ctx context.Context, m ent.Mutation) (ent.Value, error) {
if mv, ok := m.(*ent.UserMutation); ok {
return f(ctx, mv)
}
return nil, fmt.Errorf("unexpected mutation type %T. expect *ent.UserMutation", m)
}
// The VerySecretFunc type is an adapter to allow the use of ordinary
// function as VerySecret mutator.
type VerySecretFunc func(context.Context, *ent.VerySecretMutation) (ent.Value, error)
// Mutate calls f(ctx, m).
func (f VerySecretFunc) Mutate(ctx context.Context, m ent.Mutation) (ent.Value, error) {
if mv, ok := m.(*ent.VerySecretMutation); ok {
return f(ctx, mv)
}
return nil, fmt.Errorf("unexpected mutation type %T. expect *ent.VerySecretMutation", m)
}
// The WorkspaceFunc type is an adapter to allow the use of ordinary
// function as Workspace mutator.
type WorkspaceFunc func(context.Context, *ent.WorkspaceMutation) (ent.Value, error)
// Mutate calls f(ctx, m).
func (f WorkspaceFunc) Mutate(ctx context.Context, m ent.Mutation) (ent.Value, error) {
if mv, ok := m.(*ent.WorkspaceMutation); ok {
return f(ctx, mv)
}
return nil, fmt.Errorf("unexpected mutation type %T. expect *ent.WorkspaceMutation", m)
}
// Condition is a hook condition function.
type Condition func(context.Context, ent.Mutation) bool
// And groups conditions with the AND operator.
func And(first, second Condition, rest ...Condition) Condition {
return func(ctx context.Context, m ent.Mutation) bool {
if !first(ctx, m) || !second(ctx, m) {
return false
}
for _, cond := range rest {
if !cond(ctx, m) {
return false
}
}
return true
}
}
// Or groups conditions with the OR operator.
func Or(first, second Condition, rest ...Condition) Condition {
return func(ctx context.Context, m ent.Mutation) bool {
if first(ctx, m) || second(ctx, m) {
return true
}
for _, cond := range rest {
if cond(ctx, m) {
return true
}
}
return false
}
}
// Not negates a given condition.
func Not(cond Condition) Condition {
return func(ctx context.Context, m ent.Mutation) bool {
return !cond(ctx, m)
}
}
// HasOp is a condition testing mutation operation.
func HasOp(op ent.Op) Condition {
return func(_ context.Context, m ent.Mutation) bool {
return m.Op().Is(op)
}
}
// HasAddedFields is a condition validating `.AddedField` on fields.
func HasAddedFields(field string, fields ...string) Condition {
return func(_ context.Context, m ent.Mutation) bool {
if _, exists := m.AddedField(field); !exists {
return false
}
for _, field := range fields {
if _, exists := m.AddedField(field); !exists {
return false
}
}
return true
}
}
// HasClearedFields is a condition validating `.FieldCleared` on fields.
func HasClearedFields(field string, fields ...string) Condition {
return func(_ context.Context, m ent.Mutation) bool {
if exists := m.FieldCleared(field); !exists {
return false
}
for _, field := range fields {
if exists := m.FieldCleared(field); !exists {
return false
}
}
return true
}
}
// HasFields is a condition validating `.Field` on fields.
func HasFields(field string, fields ...string) Condition {
return func(_ context.Context, m ent.Mutation) bool {
if _, exists := m.Field(field); !exists {
return false
}
for _, field := range fields {
if _, exists := m.Field(field); !exists {
return false
}
}
return true
}
}
// If executes the given hook under condition.
//
// hook.If(ComputeAverage, And(HasFields(...), HasAddedFields(...)))
func If(hk ent.Hook, cond Condition) ent.Hook {
return func(next ent.Mutator) ent.Mutator {
return ent.MutateFunc(func(ctx context.Context, m ent.Mutation) (ent.Value, error) {
if cond(ctx, m) {
return hk(next).Mutate(ctx, m)
}
return next.Mutate(ctx, m)
})
}
}
// On executes the given hook only for the given operation.
//
// hook.On(Log, ent.Delete|ent.Create)
func On(hk ent.Hook, op ent.Op) ent.Hook {
return If(hk, HasOp(op))
}
// Unless skips the given hook only for the given operation.
//
// hook.Unless(Log, ent.Update|ent.UpdateOne)
func Unless(hk ent.Hook, op ent.Op) ent.Hook {
return If(hk, Not(HasOp(op)))
}
// FixedError is a hook returning a fixed error.
func FixedError(err error) ent.Hook {
return func(ent.Mutator) ent.Mutator {
return ent.MutateFunc(func(context.Context, ent.Mutation) (ent.Value, error) {
return nil, err
})
}
}
// Reject returns a hook that rejects all operations that match op.
//
// func (T) Hooks() []ent.Hook {
// return []ent.Hook{
// Reject(ent.Delete|ent.Update),
// }
// }
func Reject(op ent.Op) ent.Hook {
hk := FixedError(fmt.Errorf("%s operation is not allowed", op))
return On(hk, op)
}
// Chain acts as a list of hooks and is effectively immutable.
// Once created, it will always hold the same set of hooks in the same order.
type Chain struct {
hooks []ent.Hook
}
// NewChain creates a new chain of hooks.
func NewChain(hooks ...ent.Hook) Chain {
return Chain{append([]ent.Hook(nil), hooks...)}
}
// Hook chains the list of hooks and returns the final hook.
func (c Chain) Hook() ent.Hook {
return func(mutator ent.Mutator) ent.Mutator {
for i := len(c.hooks) - 1; i >= 0; i-- {
mutator = c.hooks[i](mutator)
}
return mutator
}
}
// Append extends a chain, adding the specified hook
// as the last ones in the mutation flow.
func (c Chain) Append(hooks ...ent.Hook) Chain {
newHooks := make([]ent.Hook, 0, len(c.hooks)+len(hooks))
newHooks = append(newHooks, c.hooks...)
newHooks = append(newHooks, hooks...)
return Chain{newHooks}
}
// Extend extends a chain, adding the specified chain
// as the last ones in the mutation flow.
func (c Chain) Extend(chain Chain) Chain {
return c.Append(chain.hooks...)
}