feat: extend math engine: currencies, timezones, finance, cooking#715
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antonreshetov merged 33 commits intomainfrom Mar 29, 2026
Merged
feat: extend math engine: currencies, timezones, finance, cooking#715antonreshetov merged 33 commits intomainfrom
antonreshetov merged 33 commits intomainfrom
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- `workdays in 3 weeks` → 15 workdays - `workdays from April 12 to June 15` → N workdays - `March 3 to March 7 in workdays` → N workdays - `2 workdays after March 3` → date
- `date to timestamp` → unix timestamp - `date as iso8601` → ISO 8601 string - `2019-04-01T15:30:00 to date` → parsed date - `1733823083000 to date` → millisecond timestamp auto-detection
…in, time difference - Airport codes: LAX, JFK, SYD, NRT, CDG, FRA, etc. - Country names: Japan, Germany, Thailand, etc. - City aliases: Seattle, Boston, Miami, etc. - `date in Vancouver` → date-only display in timezone - `time difference between Seattle and Moscow` → hours - `difference between PDT & AEST` → hours
- `5.5 minutes as timespan` → 5 min 30 s - `72 days as timespan` → 10 weeks 2 days - `5.5 minutes as laptime` → 00:05:30 - `3h 5m 10s` shorthand input → stacked time units - `03:04:05` laptime input → parsed as hours + minutes + seconds - Laptime arithmetic: `03:04:05 + 01:02:03 as laptime` → 04:06:08
- `7:30 to 20:45` → 13 hours 15 min - `4pm to 3am` → 11 hours (wraps around midnight) - `9am to 5pm` → 8 hours
- Rounding: negative numbers, to 0 dp, to nearest 1, pi to 10 digits - Fix: 'to N dp' now preserves N digits in output (not capped by default precision) - Percentages: 0%, 100%, 200%, edge cases - Fractions: 0.25 as fraction, -0.5 as fraction - Multipliers: 0x, fractional multiplier - Currency: euros/rubles words, implicit rate with EUR, reverse order - Format directives: 0 in hex/bin, 0.001 in sci, mixed hex+bin input - Conditionals: if with and, expression in condition, expression in postfix if - Calendar: Q1/Q2/Q4, 0 days between, months/years from now/ago - Clock intervals: midnight crossing, 12am/12pm, same time - Timespans: 0 seconds, 1.5 hours, singular form
- min/max, half, midpoint, random, gcd/lcm - permutations/combinations, clamp, proportions (rule of three)
- Timecode format HH:MM:SS:FF with `at/@ N fps` (default 24 fps) - `frame`/`frames` and `fps` units registered in math.js - Timecode → frames conversion: `00:30:10:00 @ 24 fps in frames` - Timecode arithmetic: `03:10:20:05 at 30 fps + 50 frames` - fps calculations: `30 fps * 3 minutes`
- Compound interest: yearly/monthly/quarterly compounding - Interest only, ROI, annual return, present value - Mortgage: daily/monthly/annual/total repayment and interest
- `0b101101 as base 8` → 0o55 - `0x2D as base 2` → 0b101101 - `hex(99)` → 0x63, `bin(0x73)` → 0b1110011, `int(0o55)` → 45
- Large numbers: B/bn (billion), T/tn (trillion), trillion word - Comments: parenthesis comments `$999 (for iPhone)`, end-of-line `// comment` - Parenthesis stripping safely skips function calls like sin(x)
- `density of yogurt` → 1.06 g/cm³ - `300g butter in cups` → mass-to-volume conversion - `10 cups olive oil in grams` → volume-to-mass conversion - ~120 cooking substances with densities
- Expand fiat currencies from 27 to 166 (all from open.er-api.com) - Add 21 cryptocurrencies via CoinGecko API (BTC, ETH, SOL, DOGE, etc.) - Prefixed dollar symbols: US$, NZ$, CA$, AU$, HK$, S$, NT$ - Custom exchange rates: `50 EUR in USD at 1.05 USD/EUR` - CoinGecko + fiat fetched in parallel with 1h cache
14 fixture files covering all math engine features: - arithmetic, variables, percentages, aggregates, rounding - math functions, conditionals, units, currency - fractions/multipliers, calendar, timezones, timespans - finance, misc functions, cooking - 4 real-world scenarios: budget, travel, cooking, dev
- Single formatMathDate() for all date outputs (timezone, calendar, arithmetic) - DateFormatStyle: 'numeric' | 'short' | 'long' (configurable via setFormatSettings) - Options: timeZone, timeZoneName, dateOnly for context-specific formatting - Remove separate formatTimeZoneDate function - All dates now respect user locale consistently
- Date format preference: numeric, short, long - Separate refresh buttons for fiat currencies and crypto rates - IPC handlers for forced refresh (ignores cache) - i18n keys for new preferences
- numericBlock stores value + unit name - Aggregates sum only if all entries have same unit - Mixed units → aggregate returns null (cannot sum) - $100 + $200 + $50 → sum = 350 USD - Unit info extracted from math.js rawResult for block tracking
antonreshetov
changed the title
- P1: merge partial rates with existing cache instead of overwriting - P2: show error toast on fiat refresh failure (was showing success) - P2: finance evaluator uses user locale for formatting - P2: cooking evaluator uses user locale for formatting - P2: cooking classifier supports all volume units (pints, quarts, etc.)
- useMathEngine.integration.test.ts (66) — multi-line, variables, aggregates, errors - useMathEngine.math.test.ts (229) — arithmetic, rounding, percentages, conditionals - useMathEngine.units.test.ts (59) — unit conversion, area/volume, css, rates - useMathEngine.currency.test.ts (22) — currency symbols, prefixes, modifiers - useMathEngine.timezones.test.ts (28) — timezone display, conversion, difference - useMathEngine.calendar.test.ts (47) — calendar, workdays, timestamps, timespans - useMathEngine.domain.test.ts (17) — finance, cooking - Shared setup in mathEngineTestUtils.ts
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