# SALAH — prayer times for Casablanca (Xiaomi Watch S4)

Offline prayer-time companion: shows today's six times (FAJR, SHURUK, DHUHR,
ASR, MAGHRIB, ISHA) with the next prayer highlighted and a countdown banner.

**Status: VERIFIED MATH (matches AlAdhan on 3 reference dates); on-watch render
pending user confirmation.**

## Method

Morocco (Ministry of Habous), matching AlAdhan `method=21`:

- Fajr 19°, Isha 17° (twilight angles)
- Standard Asr (shadow factor 1× — Maliki default in Morocco)
- Dhuhr = solar noon + 5 min; Maghrib = sunset + 5 min (AlAdhan's baked offsets)
- Location hardcoded: Casablanca 33.5731, −7.5898 · TZ = UTC+1 year-round
  (Morocco dropped DST in 2018)

All computation happens **on the watch** — no GPS, no network. Pure solar math
(same Meeus approach as the sundial) lives in `src/common/prayer.js`.

## Screen

- Header: CASABLANCA + current clock
- Purple banner: next prayer name + countdown (`1h 55m`, `+1d …` wraps past midnight)
- Six chord-tapered rows: widths [380, 412, 424, 406, 368, 304] px computed from
  the circle chord at each row's position (fixed-width rows clipped off the disc
  in the first layout — asserted numerically in tests now)
- Passed prayers dimmed (opacity 0.45); next row purple-highlighted
- 15s refresh

## Project layout

```text
src/
├── app.ux, manifest.json   # com.ilias.salah, watch, designWidth 466
├── common/
│   ├── prayer.js           # times/format/nextPrayer/formatCountdown — pure, unit-tested
│   └── icon.png            # 192×192 circular icon (user-supplied mosque art)
└── pages/index/index.ux    # layout + update loop
tests/
├── prayer.cjs              # 10 tests vs AlAdhan reference times (3 dates)
├── page.cjs                # 11 wiring/layout tests (incl. chord-fit assertions)
├── make_icon.py            # icon conversion pipeline (disc detect → round mask → 192²)
└── check-rpk.py            # verifies icon/manifest inside the built .rpk
```

## Build & test

```bash
npm ci
npm run release
node tests/prayer.cjs
node tests/page.cjs
```

## Install

Side-load `dist/com.ilias.salah.release.*.rpk` via AstroBox.
Releases: https://gitea.oimcloud.myaddr.tools/codex-bot/vela-salah

## Accuracy note

Verified against AlAdhan API (method 21) for 2026-09-09, 2026-01-15, 2026-07-01 —
all six times within 2 minutes on every date. Tolerance covers the low-precision
solar vector (±0.01°) plus rounding.