🚧 WIP: batched status

server/lib/statusHistory.ts

@@ -1,6 +1,6 @@
 import { z } from "zod";
 import { db, logsDb, statusHistory } from "@server/db";
-import { and, eq, gte, lt, asc, desc } from "drizzle-orm";
+import { and, eq, gte, lt, asc, desc, inArray } from "drizzle-orm";
 import { regionalCache as cache } from "#dynamic/lib/cache";
 
 const STATUS_HISTORY_CACHE_TTL = 60; // seconds
@@ -264,9 +264,7 @@ export function computeBuckets(
 
         // Shift by the client's offset before formatting so the label reflects
         // their local calendar date rather than the UTC date of dayStartSec
-        const dateStr = new Date(
-            (dayStartSec + tzOffsetMinutes * 60) * 1000
-        )
+        const dateStr = new Date((dayStartSec + tzOffsetMinutes * 60) * 1000)
             .toISOString()
             .slice(0, 10);
 
@@ -304,3 +302,106 @@ export function computeBuckets(
 
     return { buckets, totalDowntime };
 }
+
+export type BatchedStatusHistoryResponse = Record<
+    string,
+    StatusHistoryResponse
+>;
+
+export async function getBatchedStatusHistory(
+    entityType: string,
+    entityIds: number[],
+    days: number
+): Promise<BatchedStatusHistoryResponse> {
+    // const cacheKey = statusHistoryCacheKey(entityType, entityId, days);
+    // const cached = await cache.get<StatusHistoryResponse>(cacheKey);
+    // if (cached !== undefined) {
+    //     return cached;
+    // }
+
+    // Anchor to UTC midnight so the query window aligns with stable calendar days
+    const utcToday = new Date();
+    utcToday.setUTCHours(0, 0, 0, 0);
+    const todayMidnightSec = Math.floor(utcToday.getTime() / 1000);
+    const startSec = todayMidnightSec - days * 86400;
+
+    const events = await logsDb
+        .select()
+        .from(statusHistory)
+        .where(
+            and(
+                eq(statusHistory.entityType, entityType),
+                inArray(statusHistory.entityId, entityIds),
+                gte(statusHistory.timestamp, startSec)
+            )
+        )
+        .orderBy(asc(statusHistory.timestamp));
+
+    // Fetch the last known state before the window so that entities that
+    // haven't changed status recently still show the correct status rather
+    // than appearing as "no_data".
+    const lastKnownEvents = await logsDb
+        .selectDistinctOn([statusHistory.entityId, statusHistory.timestamp])
+        .from(statusHistory)
+        .where(
+            and(
+                eq(statusHistory.entityType, entityType),
+                inArray(statusHistory.entityId, entityIds),
+                lt(statusHistory.timestamp, startSec)
+            )
+        )
+        .orderBy(desc(statusHistory.timestamp));
+
+    const eventStatusMap: Record<
+        number,
+        {
+            events: typeof events;
+            lastKnownEvent: (typeof lastKnownEvents)[number] | null;
+        }
+    > = {};
+
+    for (const event of events) {
+        if (!eventStatusMap[event.entityId]) {
+            eventStatusMap[event.entityId] = {
+                events: [],
+                lastKnownEvent:
+                    lastKnownEvents.find(
+                        (ev) => ev.entityId === event.entityId
+                    ) ?? null
+            };
+        }
+        eventStatusMap[event.entityId].events.push(event);
+    }
+
+    const result: BatchedStatusHistoryResponse = {};
+
+    for (const entityId in eventStatusMap) {
+        const event = eventStatusMap[Number(entityId)];
+        const priorStatus = event.lastKnownEvent?.status ?? null;
+
+        const { buckets, totalDowntime } = computeBuckets(
+            event.events,
+            days,
+            priorStatus
+        );
+        const totalWindow = days * 86400;
+        const overallUptime =
+            totalWindow > 0
+                ? Math.max(
+                      0,
+                      ((totalWindow - totalDowntime) / totalWindow) * 100
+                  )
+                : 100;
+
+        result[entityId] = {
+            entityType,
+            entityId: Number(entityId),
+            days: buckets,
+            overallUptimePercent: Math.round(overallUptime * 100) / 100,
+            totalDowntimeSeconds: totalDowntime
+        };
+    }
+
+    // await cache.set(cacheKey, result, STATUS_HISTORY_CACHE_TTL);
+    return result;
+}

server/routers/site/getBatchedStatusHistory.ts

@@ -0,0 +1,80 @@
+import { Request, Response, NextFunction } from "express";
+import { z } from "zod";
+import response from "@server/lib/response";
+import HttpCode from "@server/types/HttpCode";
+import createHttpError from "http-errors";
+import logger from "@server/logger";
+import { fromError } from "zod-validation-error";
+import {
+    getCachedStatusHistory,
+    statusHistoryQuerySchema,
+    StatusHistoryResponse
+} from "@server/lib/statusHistory";
+
+const siteIdParamsSchema = z.object({
+    days: z
+        .string()
+        .optional()
+        .transform((v) => (v ? parseInt(v, 10) : 90)),
+    // Minutes to add to UTC to get the requesting client's local time
+    // (e.g. Australia/Sydney standard time is 600). Optional and
+    // defaults to 0 (UTC) so older clients keep the prior behavior.
+    tzOffsetMinutes: z
+        .string()
+        .optional()
+        .transform((v) => (v ? parseInt(v, 10) : 0)),
+    siteIds: z
+        .preprocess((val) => {
+            if (val === undefined || val === null || val === "") {
+                return undefined;
+            }
+            const raw = Array.isArray(val) ? val : [val];
+            const nums = raw
+                .map((v) =>
+                    typeof v === "string" ? parseInt(v, 10) : Number(v)
+                )
+                .filter((n) => Number.isInteger(n) && n > 0);
+            const unique = [...new Set(nums)];
+            return unique.length ? unique : undefined;
+        }, z.array(z.number().int().positive()))
+        .openapi({
+            description: "Filter by siteIds (repeat query param)"
+        })
+});
+
+export async function getBatchedSiteStatusHistory(
+    req: Request,
+    res: Response,
+    next: NextFunction
+): Promise<any> {
+    try {
+        const parsedQuery = siteIdParamsSchema.safeParse(req.query);
+        if (!parsedQuery.success) {
+            return next(
+                createHttpError(
+                    HttpCode.BAD_REQUEST,
+                    fromError(parsedQuery.error).toString()
+                )
+            );
+        }
+
+        const entityType = "site";
+        const entityId = parsedParams.data.siteId;
+        const { days } = parsedQuery.data;
+
+        const data = await getCachedStatusHistory(entityType, entityId, days);
+
+        return response<StatusHistoryResponse>(res, {
+            data,
+            success: true,
+            error: false,
+            message: "Status history retrieved successfully",
+            status: HttpCode.OK
+        });
+    } catch (error) {
+        logger.error(error);
+        return next(
+            createHttpError(HttpCode.INTERNAL_SERVER_ERROR, "An error occurred")
+        );
+    }
+}

src/lib/queries.ts

@@ -640,6 +640,28 @@ export const orgQueries = {
                 };
             }
         }),
+    batchedSiteStatusHistory: ({
+        siteIds,
+        days = 90
+    }: {
+        siteIds: number[];
+        days?: number;
+    }) =>
+        queryOptions({
+            queryKey: [
+                "SITE_STATUS_HISTORY",
+                "BATCHED",
+                siteIds,
+                days
+            ] as const,
+            queryFn: async ({ signal, meta }) => {
+                // TODO
+                // const res = await meta!.api.get<
+                //     AxiosResponse<StatusHistoryResponse>
+                // >(`/site/${siteId}/status-history?days=${days}`, { signal });
+                // return res.data.data;
+            }
+        }),
     siteStatusHistory: ({
         siteId,
         days = 90