Example of ngrx actions generation

command-actions-generator.ts

export interface CommandErrorPayload {
    readonly errorMessage: string;
    readonly originalError?: any;
}

export class StandardAction<TActionType extends string, TActionPayload> {
    type: TActionType;
    constructor(readonly payload: TActionPayload) { }
}

export interface ActionType<TActionType extends string, TActionPayload> extends Function {
    prototype: StandardAction<TActionType, TActionPayload>;
    new(payload: TActionPayload): StandardAction<TActionType, TActionPayload>;
}

export function createCommandActions<
    TCommandName extends string, TSuccessName extends string, TFailureName extends string,
    TCommandPayload, TSuccessPayload = TCommandPayload, TFailurePayload = TCommandPayload & CommandErrorPayload>
    (options: {
        commandName: TCommandName,
        successName: TSuccessName,
        failureName: TFailureName,
        commandPayload: TCommandPayload,
        successPayload?: TSuccessPayload,
        failurePayload?: TFailurePayload
    }) {
    return [
        class {
            type = options.commandName;
            constructor(readonly payload: TCommandPayload) { }
        },
        class {
            type = options.successName;
            constructor(readonly payload: TSuccessPayload) { }
        },
        class {
            type = options.failureName;
            constructor(readonly payload: TFailurePayload) { }
        }
    ] as [
        ActionType<TCommandName, TCommandPayload>,
        ActionType<TSuccessName, TSuccessPayload>,
        ActionType<TFailureName, TFailurePayload>
    ];
}

generated-actions-usage.ts

import { createCommandActions } from './command-actions-generator';

export const [LikePost, PostLiked, LikePostFailed] = createCommandActions({
    commandName: 'LikePost',
    successName: 'PostLiked',
    failureName: 'LikePostFailed',
    commandPayload: new PostIdPayload(),
    successPayload: new PostLikesPayload()
});

export const [DislikePost, PostDisliked, DislikePostFailed] = createCommandActions({
    commandName: 'DislikePost',
    successName: 'PostDisliked',
    failureName: 'DislikePostFailed',
    commandPayload: new PostIdPayload(),
    successPayload: new PostLikesPayload()
});

export const [AddPostToFavorites, PostAddedToFavorites, AddPostToFavoritesFailed] = createCommandActions({
    commandName: 'AddPostToFavorites',
    successName: 'PostAddedToFavorites',
    failureName: 'AddPostToFavoritesFailed',
    commandPayload: new PostIdPayload()
});

export const [RemovePostFromFavorites, PostRemovedFromFavorites, RemovePostFromFavoritesFailed] = createCommandActions({
    commandName: 'RemovePostFromFavorites',
    successName: 'PostRemovedFromFavorites',
    failureName: 'RemovePostFromFavoritesFailed',
    commandPayload: new PostIdPayload()
});

export class PostIdPayload {
    readonly id: string;
}

export class PostLikesPayload {
    readonly id: string;
    readonly likes: number;
}