67 lines
2.4 KiB
Markdown
67 lines
2.4 KiB
Markdown
# SALAH — prayer times for Casablanca (Xiaomi Watch S4)
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Offline prayer-time companion: shows today's six times (FAJR, SHURUK, DHUHR,
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ASR, MAGHRIB, ISHA) with the next prayer highlighted and a countdown banner.
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**Status: VERIFIED MATH (matches AlAdhan on 3 reference dates); on-watch render
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pending user confirmation.**
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## Method
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Morocco (Ministry of Habous), matching AlAdhan `method=21`:
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- Fajr 19°, Isha 17° (twilight angles)
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- Standard Asr (shadow factor 1× — Maliki default in Morocco)
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- Dhuhr = solar noon + 5 min; Maghrib = sunset + 5 min (AlAdhan's baked offsets)
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- Location hardcoded: Casablanca 33.5731, −7.5898 · TZ = UTC+1 year-round
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(Morocco dropped DST in 2018)
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All computation happens **on the watch** — no GPS, no network. Pure solar math
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(same Meeus approach as the sundial) lives in `src/common/prayer.js`.
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## Screen
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- Header: CASABLANCA + current clock
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- Purple banner: next prayer name + countdown (`1h 55m`, `+1d …` wraps past midnight)
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- Six chord-tapered rows: widths [380, 412, 424, 406, 368, 304] px computed from
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the circle chord at each row's position (fixed-width rows clipped off the disc
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in the first layout — asserted numerically in tests now)
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- Passed prayers dimmed (opacity 0.45); next row purple-highlighted
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- 15s refresh
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## Project layout
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```text
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src/
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├── app.ux, manifest.json # com.ilias.salah, watch, designWidth 466
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├── common/
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│ ├── prayer.js # times/format/nextPrayer/formatCountdown — pure, unit-tested
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│ └── icon.png # 192×192 circular icon (user-supplied mosque art)
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└── pages/index/index.ux # layout + update loop
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tests/
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├── prayer.cjs # 10 tests vs AlAdhan reference times (3 dates)
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├── page.cjs # 11 wiring/layout tests (incl. chord-fit assertions)
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├── make_icon.py # icon conversion pipeline (disc detect → round mask → 192²)
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└── check-rpk.py # verifies icon/manifest inside the built .rpk
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```
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## Build & test
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```bash
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npm ci
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npm run release
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node tests/prayer.cjs
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node tests/page.cjs
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```
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## Install
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Side-load `dist/com.ilias.salah.release.*.rpk` via AstroBox.
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Releases: https://gitea.oimcloud.myaddr.tools/codex-bot/vela-salah
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## Accuracy note
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Verified against AlAdhan API (method 21) for 2026-09-09, 2026-01-15, 2026-07-01 —
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all six times within 2 minutes on every date. Tolerance covers the low-precision
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solar vector (±0.01°) plus rounding.
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