96 lines
5.2 KiB
TypeScript
96 lines
5.2 KiB
TypeScript
import { GenericAction } from "../actions/action";
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import { DeduceCreateOperation, DeduceRemoveOperation, DeduceSelection, DeduceUpdateOperation, EntityDict } from "../types/Entity";
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import { EntityShape, SelectionResult, TriggerDataAttribute, TriggerTimestampAttribute } from "../types/Entity";
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import { Context } from "./Context";
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export interface CreateTriggerBase<ED extends EntityDict, T extends keyof ED, Cxt extends Context<ED>> {
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entity: T;
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name: string;
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action: 'create';
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check?: (operation: DeduceCreateOperation<ED[T]['Schema']>) => boolean;
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fn: (event: {
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operation: DeduceCreateOperation<ED[T]['Schema']>;
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}, context: Context<ED>, params?: Object) => Promise<number>;
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}
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export interface CreateTriggerInTxn<ED extends EntityDict, T extends keyof ED, Cxt extends Context<ED>> extends CreateTriggerBase<ED, T, Cxt> {
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when: 'before' | 'after';
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}
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export interface CreateTriggerCrossTxn<ED extends EntityDict, T extends keyof ED, Cxt extends Context<ED>> extends CreateTriggerBase<ED, T, Cxt> {
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when: 'commit';
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strict?: 'takeEasy' | 'makeSure';
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}
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export declare type CreateTrigger<ED extends EntityDict, T extends keyof ED, Cxt extends Context<ED>> = CreateTriggerInTxn<ED, T, Cxt> | CreateTriggerCrossTxn<ED, T, Cxt>;
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export interface UpdateTriggerBase<ED extends EntityDict, T extends keyof ED, Cxt extends Context<ED>> {
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entity: T;
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name: string;
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action: Exclude<ED[T]['Action'], GenericAction> | 'update' | Array<Exclude<ED[T]['Action'], GenericAction> | 'update'>;
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attributes?: keyof ED[T]['OpSchema'] | Array<keyof ED[T]['OpSchema']>;
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check?: (operation: DeduceUpdateOperation<ED[T]['Schema']>) => boolean;
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fn: (event: {
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operation: DeduceUpdateOperation<ED[T]['Schema']>;
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}, context: Cxt, params?: Object) => Promise<number>;
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}
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export interface UpdateTriggerInTxn<ED extends EntityDict, T extends keyof ED, Cxt extends Context<ED>> extends UpdateTriggerBase<ED, T, Cxt> {
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when: 'before' | 'after';
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}
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export interface UpdateTriggerCrossTxn<ED extends EntityDict, T extends keyof ED, Cxt extends Context<ED>> extends UpdateTriggerBase<ED, T, Cxt> {
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when: 'commit';
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strict?: 'takeEasy' | 'makeSure';
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}
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export declare type UpdateTrigger<ED extends EntityDict, T extends keyof ED, Cxt extends Context<ED>> = UpdateTriggerInTxn<ED, T, Cxt> | UpdateTriggerCrossTxn<ED, T, Cxt>;
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export interface RemoveTriggerBase<ED extends EntityDict, T extends keyof ED, Cxt extends Context<ED>> {
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entity: T;
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name: string;
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action: 'remove';
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check?: (operation: DeduceRemoveOperation<ED[T]['Schema']>) => boolean;
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fn: (event: {
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operation: DeduceRemoveOperation<ED[T]['Schema']>;
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}, context: Cxt, params?: Object) => Promise<number>;
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}
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export interface RemoveTriggerInTxn<ED extends EntityDict, T extends keyof ED, Cxt extends Context<ED>> extends RemoveTriggerBase<ED, T, Cxt> {
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when: 'before' | 'after';
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}
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export interface RemoveTriggerCrossTxn<ED extends EntityDict, T extends keyof ED, Cxt extends Context<ED>> extends RemoveTriggerBase<ED, T, Cxt> {
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when: 'commit';
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strict?: 'takeEasy' | 'makeSure';
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}
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export declare type RemoveTrigger<ED extends EntityDict, T extends keyof ED, Cxt extends Context<ED>> = RemoveTriggerInTxn<ED, T, Cxt> | RemoveTriggerCrossTxn<ED, T, Cxt>;
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export interface SelectTriggerBase<ED extends EntityDict, T extends keyof ED> {
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entity: T;
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name: string;
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action: 'select';
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}
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/**
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* selection似乎不需要支持跨事务？没想清楚
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* todo by Xc
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*/
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export interface SelectTriggerBefore<ED extends EntityDict, T extends keyof ED, Cxt extends Context<ED>> extends SelectTriggerBase<ED, T> {
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when: 'before';
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fn: (event: {
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operation: DeduceSelection<ED[T]['Schema']>;
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}, context: Cxt, params?: Object) => Promise<number>;
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}
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export interface SelectTriggerAfter<ED extends EntityDict, T extends keyof ED, Cxt extends Context<ED>> extends SelectTriggerBase<ED, T> {
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when: 'after';
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fn: <S extends ED[T]['Selection']>(event: {
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operation: S;
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result: SelectionResult<ED[T]['Schema'], S['data']>;
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}, context: Cxt, params?: Object) => Promise<number>;
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}
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export declare type SelectTrigger<ED extends EntityDict, T extends keyof ED, Cxt extends Context<ED>> = SelectTriggerBefore<ED, T, Cxt> | SelectTriggerAfter<ED, T, Cxt>;
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export declare type Trigger<ED extends EntityDict, T extends keyof ED, Cxt extends Context<ED>> = CreateTrigger<ED, T, Cxt> | UpdateTrigger<ED, T, Cxt> | RemoveTrigger<ED, T, Cxt> | SelectTrigger<ED, T, Cxt>;
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export interface TriggerEntityShape extends EntityShape {
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$$triggerData$$?: {
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name: string;
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operation: object;
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};
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$$triggerTimestamp$$?: number;
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}
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export declare abstract class Executor<ED extends EntityDict, Cxt extends Context<ED>> {
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static dataAttr: TriggerDataAttribute;
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static timestampAttr: TriggerTimestampAttribute;
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abstract registerTrigger<T extends keyof ED>(trigger: Trigger<ED, T, Cxt>): void;
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abstract preOperation<T extends keyof ED>(entity: T, operation: ED[T]['Operation'], context: Cxt): Promise<void>;
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abstract postOperation<T extends keyof ED>(entity: T, operation: ED[T]['Operation'], context: Cxt): Promise<void>;
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abstract checkpoint(context: Cxt, timestamp: number): Promise<number>;
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}
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