Retrieving keywords APIs

We will need to create a new controller and service in the keyword module to support retrieving keywords. We want to allow the UI to list all keywords, get a specific keyword, and get a list of “hot keywords.” Let’s create the service first.

@Injectable()
export class KeywordService implements IKeywordService {
    constructor(@Inject('KeywordRepository') private readonly keywordRepository: typeof Keyword,
                @Inject('KeywordEntryRepository') private readonly keywordEntryRepository: typeof KeywordEntry) { }

    public async findAll(search?: string, limit?: number): Promise<Array<Keyword>> {
        let options: IFindOptions<Keyword> = {};

        if (search) {
            if (!limit || limit < 1 || limit === NaN) {
                limit = 10;
            }

            options = {
                where: {
                    keyword: {
                        [Op.like]: `%${search}%...