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* Feedback 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 { NBFeedback } from './feedback.interface';
import { ServiceException } from '../service.exception';
/**
* Feedback table name.
*/
export const feedbackTableName = 'NB_FEEDBACK';
/**
* Feedback table service.
*/
@Injectable()
export class FeedbackService {
constructor(
@Inject(forwardRef(() => DBService))
private readonly dbService: DBService,
@Inject(forwardRef(() => ResourceService))
private readonly resourceService: ResourceService,
@Inject(forwardRef(() => UserService))
private readonly userService: UserService,
) {}
/**
* Send feedback on the application.
*
* @param userID The user's ID.
* @param feedback The feedback.
* @returns The new feedback record.
*/
public async sendFeedback(
userID: string,
feedback: string,
): Promise<NBFeedback> {
const feedbackMaxLength = await this.resourceService.getResource<number>(
'FEEDBACK_MAX_LENGTH',
);
const userExists = await this.userService.userExists(userID);
if (userExists) {
const userFeedback = await this.getUserFeedback(userID);
if (userFeedback === undefined) {
if (feedback.length >= 1 && feedback.length <= feedbackMaxLength) {
return this.dbService.create<NBFeedback>(feedbackTableName, {
userID,
feedback,
});
} else {
throw new ServiceException(
`Feedback must be between 1 and ${feedbackMaxLength} characters`,
);
}
} else {
throw new ServiceException('User has already provided feedback');
}
} else {
throw new ServiceException('User does not exist');
}
}
/**
* Determine whether or not a feedback record exists.
*
* @param feedbackID The feedback ID.
* @returns Whether or not the feedback record exists.
*/
public async feedbackExists(feedbackID: string): Promise<boolean> {
const feedback = await this.dbService.getByID<NBFeedback>(
feedbackTableName,
feedbackID,
);
return !!feedback;
}
/**
* Get a feedback record.
*
* @param feedbackID The feedback ID.
* @returns The feedback record.
*/
public async getFeedback(feedbackID: string): Promise<NBFeedback> {
const feedback = await this.dbService.getByID<NBFeedback>(
feedbackTableName,
feedbackID,
);
if (feedback) {
return feedback;
} else {
throw new ServiceException('Feedback does not exist');
}
}
/**
* Get feedback provided by a user.
*
* @param userID The user's ID.
* @returns The feedback provided by the user, or undefined if no feedback provided.
*/
public async getUserFeedback(
userID: string,
): Promise<NBFeedback | undefined> {
return this.dbService.getByFields<NBFeedback>(feedbackTableName, {
userID,
});
}
/**
* Get all user feedback.
*
* @returns All user feedback.
*/
public async getAllFeedback(): Promise<NBFeedback[]> {
return this.dbService.list<NBFeedback>(feedbackTableName, {
fieldName: 'submitTime',
sortOrder: 'ASC',
});
}
/**
* Delete a feedback record.
*
* @param feedbackID The feedback ID.
*/
public async deleteFeedback(feedbackID: string): Promise<void> {
await this.dbService.deleteByID(feedbackTableName, feedbackID);
}
}
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