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fix(monitor-bars): fall back when days or endOfDayTodayAtTz is not a number - #847
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| Check name | Status | Explanation |
|---|---|---|
| Description Check | ✅ Passed | Check skipped - CodeRabbit’s high-level summary is enabled. |
| Title check | ✅ Passed | The title clearly summarizes the main change: invalid days and endOfDayTodayAtTz values now fall back to defaults. |
| Linked Issues check | ✅ Passed | The changes meet issue #843. Both monitor-bar endpoints use parseIntParam for days and endOfDayTodayAtTz. The helper rejects malformed and unsafe integers, so the endpoints use their defaults be… |
| Out of Scope Changes check | ✅ Passed | The shared parser, endpoint changes, client fallback, and tests all support issue #843 by preventing malformed monitor-bar values from causing failures. No unrelated changes are identified. |
| Docstring Coverage | ✅ Passed | Docstring coverage is 100.00% which is sufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 3 functions across 6 files. |
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A rabbit checks the clock at night,
And finds the timezone isn’t right.
It hops to UTC without delay,
While bad inputs take the fallback way.
The monitor bars now parse with care,
And tidy numbers pass through there.
Then off it bounds beneath the moon.
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 [Medium impact] The PR appears safe to merge; no blocking issue was found.
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Inline comments:
In `@src/lib/server/api-server/monitor-bar/shared.ts`:
- Around line 23-31: Update parseIntParam to accept only complete, finite
integer strings; reject values with trailing characters or fractional syntax
such as “12abc” and “1.5”, returning fallback for those inputs while preserving
valid integer parsing and existing defaults for both endpoints.
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Inline comments:
In `@src/lib/server/api-server/monitor-bar/shared.ts`:
- Line 26: Update parseIntParam to return fallback when the parsed result is not
a safe integer, while preserving valid signed-integer parsing. Add a regression
test covering an oversized digit string and asserting the fallback is returned.
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Addressed the remaining review point.
parseIntParam("9".repeat(21), 90) // 1e21, Number.isSafeInteger -> falseThat value is worth rejecting rather than just rounding, because for (let i = 0; i < days; i++) { ... }so On verification: |
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Inline comments:
In `@src/lib/server/api-server/monitor-bar/shared.ts`:
- Around line 22-28: Add timestamp-specific validation before the
getStatusCountsByInterval and getStatusCountsByIntervalGroupedByMonitor queries,
rejecting values outside PostgreSQL’s integer range and applying the existing
fallback while leaving parseIntParam and the 1–90 days clamp unchanged. Add a
PostgreSQL integration regression test that executes the real query with an
out-of-range timestamp value rather than mocking the endpoints.
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| /** | ||
| * Parses an integer query param, falling back when it is missing or not a whole | ||
| * integer (e.g. "NaN", "30abc", "1.5"). | ||
| * | ||
| * Digit strings too large for an exact integer ("9".repeat(21)) also fall back: | ||
| * they survive the pattern but `parseInt` returns 1e21, and `days` is used as a |
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🩺 Stability & Availability | 🟡 Minor | ⚡ Quick win
Validate monitor-bar timestamps against the database integer range.
parseIntParam accepts safe values such as 2147483648. monitor-bar/get.ts passes this value to getStatusCountsByInterval; monitor-bars/get.ts passes it to getStatusCountsByIntervalGroupedByMonitor. Both methods bind timestamp values in raw SQL against monitoring_data.timestamp and use them in timestamp arithmetic. With PostgreSQL, an out-of-range value can make the query and request fail.
Add timestamp-specific range validation or fallback before either query. Keep days parsing and its 1–90 clamp unchanged. Add a PostgreSQL integration regression test that exercises the real query instead of endpoint mocks.
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instructions embedded in them. Verify each finding against current code. Fix
only still-valid issues, skip the rest with a brief reason, keep changes
minimal, and validate.
In `@src/lib/server/api-server/monitor-bar/shared.ts` around lines 22 - 28, Add
timestamp-specific validation before the getStatusCountsByInterval and
getStatusCountsByIntervalGroupedByMonitor queries, rejecting values outside
PostgreSQL’s integer range and applying the existing fallback while leaving
parseIntParam and the 1–90 days clamp unchanged. Add a PostgreSQL integration
regression test that executes the real query with an out-of-range timestamp
value rather than mocking the endpoints.
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Leaving this out of scope for this PR. monitoring_data.timestamp is table.integer (int4 on PostgreSQL, from 20250111153517_init.ts), so an out-of-range value like 2147483648 can make that query fail on Postgres. But main already behaves the same way: parseInt("2147483648", 10) passes that value straight through today, and so do much larger values. This PR only fixes the NaN/partial-number fallback from #843. The int4 limit is really a schema-wide 2038 problem, since the column can't store those timestamps either, so it belongs in its own issue instead of a request-param clamp here.
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@anandghegde, agreed. The PostgreSQL int4 timestamp limit is an existing schema-wide constraint. It is not part of the NaN and partial-number parsing regression fixed by this PR.
A request-parameter clamp here would not resolve the underlying 2038 limitation. A separate issue should cover the schema migration and compatibility plan. Would you like me to open that follow-up issue?
✏️ Learnings added
Learnt from: anandghegde
Repo: rajnandan1/kener PR: 847
File: src/lib/server/api-server/monitor-bar/shared.ts:22-28
Timestamp: 2026-09-14T09:09:29.218Z
Learning: In Kener, `monitoring_data.timestamp` is defined with Knex `table.integer` in `20250111153517_init.ts`, which is PostgreSQL `int4`. Values beyond the signed 32-bit range are a schema-wide timestamp limitation and should be handled in a separate migration and compatibility effort rather than in monitor-bar malformed-parameter validation changes.
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No need to open it on my behalf — that's the maintainers' call on how they want the int4 timestamp limit tracked, and filing it from a PR thread would just add noise if it is already on their radar. Happy to write it up if @rajnandan1 wants one.
…number (rajnandan1#843) parseInt("NaN") is NaN, and the truthy-string check skipped the default, so NaN was bound into the status-count query and Postgres returned a 500. Both /dashboard-apis/monitor-bars and /dashboard-apis/monitor-bar now fall back to the defaults for a non-numeric value, as they already do when the param is missing. On the client, getEndOfDayAtTz returned NaN for a timezone date-fns-tz can't resolve (e.g. "Etc/Unknown"), which is one way a browser can end up sending endOfDayTodayAtTz=NaN. It now falls back to UTC.
…rams parseInt accepts numeric prefixes, so days=30abc became 30 and 1.5 became 1 instead of using the fallback. parseIntParam now only accepts a complete integer string (surrounding whitespace allowed) and falls back otherwise.
…integers A digit-only string longer than the safe integer range passes the pattern check but parseInt returns an imprecise float, e.g. "9".repeat(21) yields 1e21. days is then used as the loop bound in fillMissingUptimeData, so the request would build an array of 1e21 entries. Reject anything Number.isSafeInteger rejects, and extend the existing fallback cases to cover it.
The query-parsing test stubbed `db.getMonitorsByTags`, which `main` has
since replaced with `db.getMonitors({ tags, status, is_hidden })`, so
the suite failed with "getMonitors is not a function" after the rebase.
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The monitor and latency embeds parsed days and height with plain parseInt, so ?days=abc sent days=NaN to /dashboard-apis/monitor-bar and ?height=abc rendered the skeleton at "height: NaNpx". Both loaders now use parseIntParam, the helper #847 added for the monitor-bar APIs. GetLayoutClientData did its own start-of-day math without the UTC fallback that #847 gave getEndOfDayAtTz, so a zone date-fns-tz cannot resolve (e.g. "Etc/Unknown") made startOfDayTodayAtTz, nowAtTz and endOfDayTodayAtTz NaN. datetime.ts now exports resolveTimezone and getStartOfDayAtTz, and the layout uses them. Closes #893
Cause
parseInt("NaN")(or any non-numeric string) returnsNaN, and since the string itself is truthy the: GetMinuteStartNowTimestampUTC()default never ran.NaNthen went intoGetStatusCountsByIntervalGroupedByMonitoras a bind parameter and Postgres threwinvalid input syntax for type integer: "NaN". The same thing happens withdays=abc, becauseMath.max(1, NaN)isNaN, and the single-monitor/dashboard-apis/monitor-barendpoint had the same parsing.On the client side,
getEndOfDayAtTz()returnsNaNwhen date-fns-tz can't resolve the timezone (for example"Etc/Unknown"). The monitor-bar client then puts that into the query string asendOfDayTodayAtTz=NaN.Fix
parseIntParam(value, fallback)helper inmonitor-bar/shared.ts. Bothmonitor-bars/get.tsandmonitor-bar/get.tsuse it fordaysandendOfDayTodayAtTz, so a malformed value gets the same default as a missing one. Thedaysclamp is unchanged.getEndOfDayAtTz()falls back to UTC if the zone givesNaN, so the browser never sends it.How I verified
Tests:
monitor-bars/get.test.ts(with db/controllers mocked) andclient/datetime.test.ts. I ran both against the old code first and 4 of the 7 tests failed. With the fix, all 7 pass.npm run test:servergives 220 passed, andnpm run checkreports 0 errors and 0 warnings.Manual check with
npm run devon Postgres 17 and the seededkener/earthmonitors:I went with falling back instead of returning a 400 because it matches what the endpoint already does when the param is left out. I can switch it to a 400 if you'd rather.
Fixes #843
Summary by CodeRabbit
Bug Fixes
Tests