/
reports.service.ts
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/
reports.service.ts
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import { Injectable } from "@nestjs/common";
import {
eachDayOfInterval,
eachMonthOfInterval,
eachWeekOfInterval,
eachYearOfInterval,
formatISO,
Interval,
isSameDay,
isSameMonth,
isSameWeek,
isSameYear,
parseISO,
} from "date-fns";
import { ListensService } from "../listens/listens.service";
import { GetListenReportDto } from "./dto/get-listen-report.dto";
import { ListenReportDto } from "./dto/listen-report.dto";
import { Timeframe } from "./timeframe.enum";
const timeframeToDateFns: {
[x in Timeframe]: {
eachOfInterval: (interval: Interval) => Date[];
isSame: (dateLeft: Date, dateRight: Date) => boolean;
};
} = {
[Timeframe.Day]: {
eachOfInterval: eachDayOfInterval,
isSame: isSameDay,
},
[Timeframe.Week]: {
eachOfInterval: eachWeekOfInterval,
isSame: isSameWeek,
},
[Timeframe.Month]: {
eachOfInterval: eachMonthOfInterval,
isSame: isSameMonth,
},
[Timeframe.Year]: {
eachOfInterval: eachYearOfInterval,
isSame: isSameYear,
},
};
@Injectable()
export class ReportsService {
constructor(private readonly listensService: ListensService) {}
async getListens(options: GetListenReportDto): Promise<ListenReportDto> {
const { user, timeFrame, timeStart, timeEnd } = options;
const { items: listens } = await this.listensService.getListens({
user,
filter: { time: { start: timeStart, end: timeEnd } },
page: 1,
limit: 10000000,
});
const reportInterval: Interval = {
start: parseISO(timeStart),
end: parseISO(timeEnd),
};
const { eachOfInterval, isSame } = timeframeToDateFns[timeFrame];
const reportItems = eachOfInterval(reportInterval).map((date) => {
const count = listens.filter((listen) => isSame(date, listen.playedAt))
.length;
return { date: formatISO(date), count };
});
return { items: reportItems, timeStart, timeEnd, timeFrame };
}
}