feat: 添加hook工具包,快速hook.On

main v1.0.6
NoahLan 1 year ago
parent 3e614c38e4
commit 3a3471e210

@ -0,0 +1,188 @@
package hook
import (
"context"
"entgo.io/ent"
"fmt"
)
// 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...)
}

@ -7,6 +7,7 @@ import (
"entgo.io/ent/schema/field" "entgo.io/ent/schema/field"
"entgo.io/ent/schema/mixin" "entgo.io/ent/schema/mixin"
"fmt" "fmt"
"git.noahlan.cn/noahlan/ntool-biz/core/orm/nent/hook"
) )
// OptimisticLockMixin implements the ent.Mixin for sharing // OptimisticLockMixin implements the ent.Mixin for sharing
@ -33,28 +34,25 @@ func WithVersion(parent context.Context, version int64) context.Context {
// Hooks of the OptimisticLockMixin. // Hooks of the OptimisticLockMixin.
func (d OptimisticLockMixin) Hooks() []ent.Hook { func (d OptimisticLockMixin) Hooks() []ent.Hook {
return []ent.Hook{ return []ent.Hook{
func(next ent.Mutator) ent.Mutator { hook.On(func(next ent.Mutator) ent.Mutator {
return ent.MutateFunc(func(ctx context.Context, m ent.Mutation) (ent.Value, error) { return ent.MutateFunc(func(ctx context.Context, m ent.Mutation) (ent.Value, error) {
if m.Op().Is(ent.OpUpdate | ent.OpUpdateOne) { mx, ok := m.(interface {
mx, ok := m.(interface { AddVersion(i int64)
AddVersion(i int64) WhereP(...func(*sql.Selector))
WhereP(...func(*sql.Selector)) })
}) if !ok {
if !ok { return nil, fmt.Errorf("unexpected mutation type %T", m)
return nil, fmt.Errorf("unexpected mutation type %T", m) }
}
// get pre-version for update condition | where version={pre-version} // get pre-version for update condition | where version={pre-version}
if preVersion, preVersionOk := ctx.Value(optimisticLockKey{}).(int64); preVersionOk { if preVersion, preVersionOk := ctx.Value(optimisticLockKey{}).(int64); preVersionOk {
d.P(mx, preVersion) d.P(mx, preVersion)
}
// set version=version+1
mx.AddVersion(1)
return next.Mutate(ctx, m)
} }
// set version=version+1
mx.AddVersion(1)
return next.Mutate(ctx, m) return next.Mutate(ctx, m)
}) })
}, }, ent.OpUpdate|ent.OpUpdateOne),
} }
} }

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