nestjs-paginate-relations-filter-middleware/dist/middleware/relation-filter.middleware.js

An enhanced middleware for capturing unrelated filters for nestjs-paginate lib

"use strict";
var __decorate = (this && this.__decorate) || function (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;
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.RelationFilterMiddleware = void 0;
const common_1 = require("@nestjs/common");
let RelationFilterMiddleware = class RelationFilterMiddleware {
    constructor() {
        this.relations = [];
        this.filters = [];
    }
    use(req, res, next) {
        this.relations = []; // Make empty in all request
        this.filters = []; // Make empty in all Request
        const [endPointUrl, originalUrl] = req.originalUrl.split("?");
        const errorMessage = (whereFilterRelation) => {
            const wrongUrl = `${req.protocol}://${req.get("Host")}${req.originalUrl}`;
            const correctUrl = `${req.protocol}://${req.get("Host")}${endPointUrl}?relations=${whereFilterRelation}&${originalUrl}`;
            const errorMesage = `You need to type the Relation of the Filter you type. Example; WrongLink: ${wrongUrl}, CorrectLink: ${correctUrl}`;
            return errorMesage;
        };
        if (originalUrl) {
            originalUrl.split("&").map((element) => {
                // Relations
                if (element.includes("relations=")) {
                    const [__, relation] = element.split("=");
                    if (relation.includes(",")) {
                        // More Than One Relation
                        relation.split(",").map((relationElement) => {
                            this.relations.push(relationElement);
                        });
                    }
                    else {
                        // Only One Relation
                        this.relations.push(relation);
                    }
                }
                else {
                    this.filters.push(element);
                }
            });
        }
        if (this.filters.length) {
            this.filters.map((filterElement) => {
                const filteredElement = filterElement.split(".");
                const filterSize = filteredElement.length;
                const minReqFilterSize = 3;
                if (filterSize >= minReqFilterSize) {
                    const whereFilterRelation = filteredElement[1];
                    if (!this.relations.includes(whereFilterRelation)) {
                        throw new common_1.BadRequestException(errorMessage(whereFilterRelation));
                    }
                }
            });
        }
        next();
    }
};
RelationFilterMiddleware = __decorate([
    (0, common_1.Injectable)()
], RelationFilterMiddleware);
exports.RelationFilterMiddleware = RelationFilterMiddleware;
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