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* Report service.
* @packageDocumentation
*/
import { Injectable, Inject, forwardRef } from '@nestjs/common';
import { DBService } from '../db/db.service';
import { ResourceService } from '../resource/resource.service';
import { UserService } from '../user/user.service';
import { BookService, bookTableName } from '../book/book.service';
import { NBReport } from './report.interface';
import { NBBook } from '../../services/book/book.interface';
import { ServiceException } from '../service.exception';
/**
* Report table name.
*/
export const reportTableName = 'NB_REPORT';
/**
* Report table service.
*/
@Injectable()
export class ReportService {
constructor(
@Inject(forwardRef(() => DBService))
private readonly dbService: DBService,
@Inject(forwardRef(() => ResourceService))
private readonly resourceService: ResourceService,
@Inject(forwardRef(() => UserService))
private readonly userService: UserService,
@Inject(forwardRef(() => BookService))
private readonly bookService: BookService,
) {}
/**
* Report a book.
*
* @param userID The ID of the user reporting the book.
* @param bookID The book's ID.
* @param reason The reason for reporting.
* @returns The new book record.
*/
public async reportBook(
userID: string,
bookID: string,
reason: string,
): Promise<NBReport> {
const reportReasonMaxLength =
await this.resourceService.getResource<number>(
'REPORT_REASON_MAX_LENGTH',
);
const userExists = await this.userService.userExists(userID);
if (userExists) {
const bookExists = await this.bookService.bookExists(bookID);
if (bookExists) {
if (reason.length >= 1 && reason.length <= reportReasonMaxLength) {
return this.dbService.create<NBReport>(reportTableName, {
bookID,
userID,
reason,
});
} else {
throw new ServiceException(
`Report reason must be between 1 and ${reportReasonMaxLength} characters`,
);
}
} else {
throw new ServiceException('Book does not exist');
}
} else {
throw new ServiceException('User does not exist');
}
}
/**
* Determine whether or not a report exists.
*
* @param reportID The report's ID.
* @returns Whether or not the report exists.
*/
public async reportExists(reportID: string): Promise<boolean> {
const report = await this.dbService.getByID<NBReport>(
reportTableName,
reportID,
);
return !!report;
}
/**
* Get a report.
*
* @param reportID The report's ID.
* @returns The report record.
*/
public async getReport(reportID: string): Promise<NBReport> {
const report = await this.dbService.getByID<NBReport>(
reportTableName,
reportID,
);
if (report) {
return report;
} else {
throw new ServiceException('Report does not exist');
}
}
/**
* Get all reports.
*
* @returns All reports.
*/
public async getReports(): Promise<NBReport[]> {
return this.dbService.list<NBReport>(reportTableName, {
fieldName: 'reportTime',
sortOrder: 'ASC',
});
}
/**
* Determine whether or not a user has reported a book.
*
* @param userID The user's ID.
* @param bookID The book's ID.
* @returns Whether or not the user has reported the book.
*/
public async userReportedBook(
userID: string,
bookID: string,
): Promise<boolean> {
const report = await this.dbService.getByFields<NBReport>(reportTableName, {
userID,
bookID,
});
return !!report;
}
/**
* Get a user report for a book.
*
* @param userID The user's ID.
* @param bookID The book's ID.
* @returns The report.
*/
public async getUserBookReport(
userID: string,
bookID: string,
): Promise<NBReport> {
const report = await this.dbService.getByFields<NBReport>(reportTableName, {
userID,
bookID,
});
if (report) {
return report;
} else {
throw new ServiceException('Report does not exist');
}
}
/**
* Determine whether or not a user has recently reported a book.
*
* @param userID The user's ID.
* @returns Whether or not the user has recently reported a book.
*/
public async userReportedRecently(userID: string): Promise<boolean> {
const userReportCooldown = await this.resourceService.getResource<number>(
'USER_REPORT_COOLDOWN',
);
const report = await this.dbService.getCustom<NBReport>(
reportTableName,
'"userID" = ? AND EXTRACT(EPOCH FROM NOW() - "reportTime") <= ?',
[userID, userReportCooldown],
);
return !!report;
}
/**
* Get all reports made by a user.
*
* @param userID The user's ID.
* @returns All reports made by the user.
*/
public async getUserBookReports(userID: string): Promise<NBReport[]> {
const userExists = await this.userService.userExists(userID);
if (userExists) {
return this.dbService.listByFields<NBReport>(reportTableName, { userID });
} else {
throw new ServiceException('User does not exist');
}
}
/**
* Get all books reported by a user.
*
* @param userID The user's ID.
* @returns All books reported by the user.
*/
public async getUserReportedBooks(userID: string): Promise<NBBook[]> {
const userExists = await this.userService.userExists(userID);
if (userExists) {
const sql = `
SELECT "${bookTableName}".*
FROM "${reportTableName}"
JOIN "${bookTableName}"
ON "${reportTableName}"."bookID" = "${bookTableName}".id
WHERE "${reportTableName}"."userID" = ?
ORDER BY "${reportTableName}"."reportTime" ASC;`;
const params = [userID];
return this.dbService.execute<NBBook>(sql, params);
} else {
throw new ServiceException('User does not exist');
}
}
/**
* Get all reports for a book.
*
* @param bookID The book's ID.
* @returns All reports for the book.
*/
public async getBookReports(bookID: string): Promise<NBReport[]> {
const bookExists = await this.bookService.bookExists(bookID);
if (bookExists) {
return this.dbService.listByFields<NBReport>(reportTableName, { bookID });
} else {
throw new ServiceException('Book does not exist');
}
}
/**
* Delete a report.
*
* @param reportID The report's ID.
*/
public async deleteReport(reportID: string): Promise<void> {
await this.dbService.deleteByID(reportTableName, reportID);
}
/**
* Delete a reported book and all reports associated with it.
*
* @param reportID The report's ID.
*/
public async deleteReportedBook(reportID: string): Promise<void> {
const report = await this.getReport(reportID);
await this.bookService.deleteBook(report.bookID, false);
}
}
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