57 lines
1.8 KiB
TypeScript
57 lines
1.8 KiB
TypeScript
import { JsonSchema, jsonType } from "t_rest/server";
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import { kvMemoize } from "./kvMemoize.ts";
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import { db } from "./db.ts";
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import { generationStore } from "./generationStore.ts";
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import { hoursToMilliseconds, isSameDay, minutesToMilliseconds } from "date-fns";
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import { UTCDateMini } from "date-fns/utc";
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export const userDailyStatsSchema = {
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type: "object",
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properties: {
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imageCount: { type: "number" },
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pixelCount: { type: "number" },
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timestamp: { type: "number" },
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},
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required: ["imageCount", "pixelCount", "timestamp"],
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} as const satisfies JsonSchema;
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export type UserDailyStats = jsonType<typeof userDailyStatsSchema>;
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export const getUserDailyStats = kvMemoize(
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db,
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["userDailyStats"],
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async (userId: number, year: number, month: number, day: number): Promise<UserDailyStats> => {
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let imageCount = 0;
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let pixelCount = 0;
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for await (
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const generation of generationStore.listBy("fromId", {
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after: new Date(Date.UTC(year, month - 1, day)),
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before: new Date(Date.UTC(year, month - 1, day + 1)),
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value: userId,
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})
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) {
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imageCount++;
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pixelCount += (generation.value.info?.width ?? 0) * (generation.value.info?.height ?? 0);
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}
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return {
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imageCount,
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pixelCount,
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timestamp: Date.now(),
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};
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},
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{
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// expire in 1 minute if was calculated on the same day, otherwise 7-14 days.
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expireIn: (result, year, month, day) => {
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const requestDate = new UTCDateMini(year, month - 1, day);
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const calculatedDate = new UTCDateMini(result.timestamp);
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return isSameDay(requestDate, calculatedDate)
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? minutesToMilliseconds(1)
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: hoursToMilliseconds(24 * 7 + Math.random() * 24 * 7);
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},
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// should cache if the stats are non-zero
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shouldCache: (result) => result.imageCount > 0 || result.pixelCount > 0,
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},
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);
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