@rytass/cms-base-nestjs-module/data-loaders/article-version.dataloader.js

Rytass Content Management System NestJS Base Module

import { Injectable, Inject } from '@nestjs/common';
import { RESOLVED_ARTICLE_REPO, MULTIPLE_LANGUAGE_MODE } from '../typings/cms-base-providers.js';
import { Repository } from 'typeorm';
import DataLoader from 'dataloader';
import { removeArticleInvalidFields, removeMultipleLanguageArticleVersionInvalidFields, removeArticleVersionInvalidFields, removeArticleVersionContentInvalidFields } from '../utils/remove-invalid-fields.js';
import { DEFAULT_LANGUAGE } from '../constants/default-language.js';
import { LRUCache } from 'lru-cache';
import { ArticleStage } from '../typings/article-stage.enum.js';
import { SignatureService } from '../services/signature.service.js';
import { ArticleSignatureResult } from '../typings/article-signature-result.enum.js';

function _ts_decorate(decorators, target, key, desc) {
    var c = arguments.length, r = c < 3 ? target : desc === null ? desc = Object.getOwnPropertyDescriptor(target, key) : desc, d;
    if (typeof Reflect === "object" && typeof Reflect.decorate === "function") r = Reflect.decorate(decorators, target, key, desc);
    else for(var i = decorators.length - 1; i >= 0; i--)if (d = decorators[i]) r = (c < 3 ? d(r) : c > 3 ? d(target, key, r) : d(target, key)) || r;
    return c > 3 && r && Object.defineProperty(target, key, r), r;
}
function _ts_metadata(k, v) {
    if (typeof Reflect === "object" && typeof Reflect.metadata === "function") return Reflect.metadata(k, v);
}
function _ts_param(paramIndex, decorator) {
    return function(target, key) {
        decorator(target, key, paramIndex);
    };
}
class ArticleVersionDataLoader {
    articleRepo;
    multipleLanguageMode;
    signatureService;
    constructor(articleRepo, multipleLanguageMode, signatureService){
        this.articleRepo = articleRepo;
        this.multipleLanguageMode = multipleLanguageMode;
        this.signatureService = signatureService;
    }
    stageVersionsLoader = new DataLoader(async (ids)=>{
        const qb = this.articleRepo.createQueryBuilder('articles');
        qb.innerJoinAndSelect('articles.versions', 'versions');
        qb.leftJoinAndSelect('versions.signatures', 'signatures');
        qb.leftJoinAndSelect('versions.multiLanguageContents', 'multiLanguageContents');
        qb.andWhere('versions.articleId IN (:...ids)', {
            ids: ids
        });
        const articles = await qb.getMany();
        const articleMap = new Map(articles.map((article)=>[
                article.id,
                article.versions.reduce((vars, version)=>{
                    const articleVersion = this.multipleLanguageMode ? {
                        ...removeMultipleLanguageArticleVersionInvalidFields(version),
                        ...removeArticleInvalidFields(article),
                        id: article.id,
                        createdAt: article.createdAt,
                        updatedAt: article.versions[0].createdAt,
                        deletedAt: article.deletedAt,
                        updatedBy: article.versions[0].createdBy
                    } : {
                        ...removeArticleVersionContentInvalidFields(version.multiLanguageContents.find((content)=>content.language === DEFAULT_LANGUAGE)),
                        ...removeArticleVersionInvalidFields(version),
                        ...removeArticleInvalidFields(article),
                        id: article.id,
                        createdAt: article.createdAt,
                        updatedAt: version.createdAt,
                        deletedAt: article.deletedAt,
                        updatedBy: version.createdBy
                    };
                    if (version.releasedAt) {
                        if (version.releasedAt.getTime() > Date.now()) {
                            return {
                                ...vars,
                                [ArticleStage.SCHEDULED]: articleVersion
                            };
                        }
                        return {
                            ...vars,
                            [ArticleStage.RELEASED]: articleVersion
                        };
                    }
                    if (version.signatures.some((sig)=>sig.result === ArticleSignatureResult.APPROVED && sig.deletedAt === null && sig.signatureLevelId === this.signatureService.finalSignatureLevel?.id)) {
                        return {
                            ...vars,
                            [ArticleStage.VERIFIED]: articleVersion
                        };
                    }
                    if (version.submittedAt) {
                        return {
                            ...vars,
                            [ArticleStage.REVIEWING]: articleVersion
                        };
                    }
                    return {
                        ...vars,
                        [ArticleStage.DRAFT]: articleVersion
                    };
                }, {
                    [ArticleStage.DRAFT]: null,
                    [ArticleStage.REVIEWING]: null,
                    [ArticleStage.VERIFIED]: null,
                    [ArticleStage.SCHEDULED]: null,
                    [ArticleStage.RELEASED]: null
                })
            ]));
        return ids.map((id)=>articleMap.get(id));
    }, {
        cache: true,
        cacheMap: new LRUCache({
            ttl: 1000 * 10,
            max: 1000,
            ttlAutopurge: true
        })
    });
    versionsLoader = new DataLoader(async (ids)=>{
        const qb = this.articleRepo.createQueryBuilder('articles');
        qb.withDeleted();
        qb.innerJoinAndSelect('articles.versions', 'versions');
        qb.leftJoinAndSelect('versions.signatures', 'signatures');
        qb.leftJoinAndSelect('versions.multiLanguageContents', 'multiLanguageContents');
        qb.andWhere('versions.articleId IN (:...ids)', {
            ids: ids
        });
        qb.addOrderBy('versions.version', 'ASC');
        const articles = await qb.getMany();
        const articleMap = new Map(articles.map((article)=>[
                article.id,
                article.versions.map((version)=>this.multipleLanguageMode ? {
                        ...removeMultipleLanguageArticleVersionInvalidFields(version),
                        ...removeArticleInvalidFields(article),
                        id: article.id,
                        createdAt: article.createdAt,
                        updatedAt: article.versions[0].createdAt,
                        deletedAt: article.deletedAt,
                        updatedBy: article.versions[0].createdBy
                    } : {
                        ...removeArticleVersionContentInvalidFields(version.multiLanguageContents.find((content)=>content.language === DEFAULT_LANGUAGE)),
                        ...removeArticleVersionInvalidFields(version),
                        ...removeArticleInvalidFields(article),
                        id: article.id,
                        createdAt: article.createdAt,
                        updatedAt: version.createdAt,
                        deletedAt: article.deletedAt,
                        updatedBy: version.createdBy
                    })
            ]));
        return ids.map((id)=>articleMap.get(id) || []);
    }, {
        cache: true,
        cacheMap: new LRUCache({
            ttl: 1000 * 10,
            max: 1000,
            ttlAutopurge: true
        })
    });
}
ArticleVersionDataLoader = _ts_decorate([
    Injectable(),
    _ts_param(0, Inject(RESOLVED_ARTICLE_REPO)),
    _ts_param(1, Inject(MULTIPLE_LANGUAGE_MODE)),
    _ts_metadata("design:type", Function),
    _ts_metadata("design:paramtypes", [
        typeof Repository === "undefined" ? Object : Repository,
        Boolean,
        typeof SignatureService === "undefined" ? Object : SignatureService
    ])
], ArticleVersionDataLoader);

export { ArticleVersionDataLoader };