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Add quick add-reading homepage, photo take/choose picker, carry-forward estimate rate

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Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
This commit is contained in:
jtricerolph 2026-10-23 11:56:08 +00:00
parent 68dab06b0a
commit 847fe49acd
6 changed files with 180 additions and 7 deletions
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14
backend/src/lib/cost-calc.js
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@ -167,9 +167,19 @@ export async function getTrailingDailyRate(meterId, windowDays) {
windowStart.setDate(windowStart.getDate() - windowDays)
const windowStartStr = windowStart.toISOString().slice(0, 10)
const before = await readingOnOrBefore(meterId, windowStartStr)
let before = await readingOnOrBefore(meterId, windowStartStr)
if (!before || before.reading_date >= latest.reading_date) {
return { daily_rate: null, latest }
// Nothing old enough to fill the window (readings are sparse) — fall back
// to the average between the last two readings so the estimate carries
// forward instead of dropping to zero until a new reading is added.
const { rows } = await pool.query(
`SELECT reading_value, reading_date FROM readings
WHERE meter_id = $1 AND reading_date < $2
ORDER BY reading_date DESC, id DESC LIMIT 1`,
[meterId, latest.reading_date]
)
before = rows[0] || null
if (!before) return { daily_rate: null, latest }
}
const days = daysBetween(before.reading_date, latest.reading_date)
if (days <= 0) return { daily_rate: null, latest }