lecoffre-back/src/app/api/notary/OfficeFolderAnchorsController.ts

import { Response, Request } from "express";
import { Controller, Get, Post } from "@ControllerPattern/index";
import ApiController from "@Common/system/controller-pattern/ApiController";
import { Service } from "typedi";
import { OfficeFolder } from "le-coffre-resources/dist/Notary";
import { getFolderHashes } from "@Common/optics/notary";
import OfficeFoldersService from "@Services/notary/OfficeFoldersService/OfficeFoldersService";
import OfficeFolderAnchorsRepository from "@Repositories/OfficeFolderAnchorsRepository";
import SecureService from "@Services/common/SecureService/SecureService";
import authHandler from "@App/middlewares/AuthHandler";
import ruleHandler from "@App/middlewares/RulesHandler";
import folderHandler from "@App/middlewares/OfficeMembershipHandlers/FolderHandler";
import OfficeFolderAnchor from "le-coffre-resources/dist/Notary/OfficeFolderAnchor";

const hydrateOfficeFolderAnchor = (data: any): OfficeFolderAnchor =>
	OfficeFolderAnchor.hydrate<OfficeFolderAnchor>(
		{
			hash_sources: data.hash_sources,
			root_hash: data.root_hash,

			blockchain: data.transactions[0].blockchain,
			status: data.transactions[0].status,

			anchor_nb_try: data.transactions[0].anchor_nb_try,
			tx_id: data.transactions[0].tx_id.toString(),
			tx_link: data.transactions[0].tx_link,
			tx_hash: data.transactions[0].tx_hash,

			anchored_at: data.transactions[0].anchoring_timestamp,
		},
		{ strategy: "excludeAll" },
	);
@Controller()
@Service()
export default class OfficeFoldersController extends ApiController {
	constructor(private secureService: SecureService, private officeFolderAnchorsRepository: OfficeFolderAnchorsRepository, private officeFoldersService: OfficeFoldersService) {
		super();
	}

	/**
	 * @description Download a folder anchoring proof document
	 */
	@Get("/api/v1/notary/anchors/download/:uid", [authHandler, ruleHandler, folderHandler])
	protected async download(req: Request, response: Response) {
		try {
			const uid = req.params["uid"];

			if (!uid) {
				this.httpBadRequest(response, "No uid provided");
				return;
			}

			const query = {
				documents: {
					include: {
						files: true,
					},
				},
			};

			const officeFolderFound = await this.officeFoldersService.getByUid(uid, query);

			if (!officeFolderFound) {
				this.httpNotFoundRequest(response, "Office folder not found");
				return;
			}

			const officeFolder = OfficeFolder.hydrate<OfficeFolder>(officeFolderFound, { strategy: "excludeAll" });
			const folderHashes = getFolderHashes(officeFolder);

			if (folderHashes.length === 0) {
				this.httpNotFoundRequest(response, "No file hash to anchor");
				return;
			}

			const sortedHashes = [...folderHashes].sort();
			const buffer = await this.secureService.download(sortedHashes);

			response.setHeader('Content-Type', 'application/pdf');
			this.httpSuccess(response, buffer);
		} catch (error) {
			this.httpInternalError(response, error);
			return;
		}
	}

	/**
	 * @description Create a new folder anchor
	 */
	@Post("/api/v1/notary/anchors/:uid", [authHandler, ruleHandler, folderHandler])
	protected async post(req: Request, response: Response) {
		try {
			const uid = req.params["uid"];

			if (!uid) {
				this.httpBadRequest(response, "No uid provided");
				return;
			}

			const query = {
				documents: {
					include: {
						files: true,
					},
				},
				folder_anchor: true,
			};

			const officeFolderFound: any = await this.officeFoldersService.getByUid(uid, query);

			if (!officeFolderFound) {
				this.httpNotFoundRequest(response, "Office folder not found");
				return;
			}

			const officeFolderAnchorFound = OfficeFolderAnchor.hydrate<OfficeFolderAnchor>(officeFolderFound.folder_anchor, {
				strategy: "excludeAll",
			});

			if (officeFolderAnchorFound) {
				this.httpBadRequest(response, {
					error: "Office folder already anchored",
					folder_anchor: officeFolderAnchorFound,
				});
				return;
			}

			const officeFolder = OfficeFolder.hydrate<OfficeFolder>(officeFolderFound, { strategy: "excludeAll" });

			const folderHashes = getFolderHashes(officeFolder);

			if (folderHashes.length === 0) {
				this.httpNotFoundRequest(response, "No file hash to anchor");
				return;
			}

			const sortedHashes = [...folderHashes].sort();
			const data = await this.secureService.anchor(sortedHashes);

			const officeFolderAnchor = hydrateOfficeFolderAnchor(data);

			const newOfficeFolderAnchor = await this.officeFolderAnchorsRepository.create(
				officeFolderAnchor
			);

			await this.officeFoldersService.update(
				uid,
				OfficeFolder.hydrate<OfficeFolder>({ uid: uid, folder_anchor: newOfficeFolderAnchor }, { strategy: "excludeAll" }),
			);

			this.httpSuccess(response, officeFolderAnchor);
		} catch (error) {
			this.httpInternalError(response, error);
			return;
		}
	}

	/**
	 * @description Verify a folder anchor status
	 */
	@Get("/api/v1/notary/anchors/:uid", [authHandler, ruleHandler, folderHandler])
	protected async get(req: Request, response: Response) {
		try {
			const uid = req.params["uid"];

			if (!uid) {
				this.httpBadRequest(response, "No uid provided");
				return;
			}

			const query = {
				documents: {
					include: {
						files: true,
					},
				},
				folder_anchor: true,
			};

			const officeFolderFound: any = await this.officeFoldersService.getByUid(uid, query);

			if (!officeFolderFound) {
				this.httpNotFoundRequest(response, "Office folder not found");
				return;
			}

			const officeFolder = OfficeFolder.hydrate<OfficeFolder>(officeFolderFound, { strategy: "excludeAll" });
			const folderHashes = getFolderHashes(officeFolder);

			if (folderHashes.length === 0) {
				this.httpNotFoundRequest(response, "No file hash to anchor");
				return;
			}

			const sortedHashes = [...folderHashes].sort();
			const officeFolderAnchorFound = OfficeFolderAnchor.hydrate<OfficeFolderAnchor>(officeFolderFound.folder_anchor, {
				strategy: "excludeAll",
			});

			if (!officeFolderAnchorFound || !officeFolderAnchorFound.uid) {
				this.httpNotFoundRequest(response, {error: "Not anchored", hash_sources: sortedHashes});
				return;
			}

			const data = await this.secureService.verify(sortedHashes);

			if (data.errors || data.transactions.length === 0) {
				this.httpNotFoundRequest(response, {error: "Not anchored", hash_sources: sortedHashes});
				return;
			}

			const officeFolderAnchor = hydrateOfficeFolderAnchor(data);

			const updatedOfficeFolderAnchor = await this.officeFolderAnchorsRepository.update(
				officeFolderAnchorFound.uid,
				officeFolderAnchor
			);

			this.httpSuccess(response, updatedOfficeFolderAnchor);
			return;
		} catch (error) {
			this.httpInternalError(response, error);
			return;
		}
	}
}