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eris/app/userDailyStatsStore.ts

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import { JsonSchema, jsonType } from "t_rest/server";
import { kvMemoize } from "./kvMemoize.ts";
import { db } from "./db.ts";
import { generationStore } from "./generationStore.ts";
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import { hoursToMilliseconds, isSameDay, minutesToMilliseconds } from "date-fns";
import { UTCDateMini } from "date-fns/utc";
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export const userDailyStatsSchema = {
type: "object",
properties: {
imageCount: { type: "number" },
pixelCount: { type: "number" },
timestamp: { type: "number" },
},
required: ["imageCount", "pixelCount", "timestamp"],
} as const satisfies JsonSchema;
export type UserDailyStats = jsonType<typeof userDailyStatsSchema>;
export const getUserDailyStats = kvMemoize(
db,
["userDailyStats"],
async (userId: number, year: number, month: number, day: number): Promise<UserDailyStats> => {
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let imageCount = 0;
let pixelCount = 0;
for await (
const generation of generationStore.listBy("fromId", {
before: new Date(new Date(year, month - 1, day).getTime() + 24 * 60 * 60 * 1000),
after: new Date(year, month - 1, day),
value: userId,
})
) {
imageCount++;
pixelCount += (generation.value.info?.width ?? 0) * (generation.value.info?.height ?? 0);
}
return {
imageCount,
pixelCount,
timestamp: Date.now(),
};
},
{
// expire in 1 minute if was calculated on the same day, otherwise 7-14 days.
expireIn: (result, year, month, day) => {
const requestDate = new UTCDateMini(year, month - 1, day);
const calculatedDate = new UTCDateMini(result.timestamp);
return isSameDay(requestDate, calculatedDate)
? minutesToMilliseconds(1)
: hoursToMilliseconds(24 * 7 + Math.random() * 24 * 7);
},
// should cache if the stats are non-zero
shouldCache: (result) => result.imageCount > 0 || result.pixelCount > 0,
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},
);