migrate stored TZ formats from IANA labels on boot

2026-10-28 11:14:58 +00:00 · 2026-10-20 21:14:45 +02:00
parent 955a6d8c56
commit 746e5c5ef3
6 changed files with 704 additions and 13 deletions
@@ -0,0 +1,83 @@
+#!/usr/bin/env python3
+"""Generate src/ESP32React/tz_zones.h from interface/src/app/settings/TZ.tsx.
+
+Run from the repo root:
+  python3 scripts/generate_tz_zones.py
+"""
+
+from __future__ import annotations
+
+import re
+import sys
+from pathlib import Path
+
+ROOT = Path(__file__).resolve().parents[1]
+TZ_TSX = ROOT / "interface" / "src" / "app" / "settings" / "TZ.tsx"
+OUT_H = ROOT / "src" / "ESP32React" / "tz_zones.h"
+
+
+def parse_time_zones(text: str) -> list[tuple[str, str]]:
+    match = re.search(
+        r"export const TIME_ZONES: Record<string, string> = \{([\s\S]*?)\n\};",
+        text,
+    )
+    if not match:
+        raise SystemExit("TIME_ZONES table not found in TZ.tsx")
+    entries = re.findall(r"'((?:\\'|[^'])*)': '((?:\\'|[^'])*)'", match.group(1))
+    if not entries:
+        raise SystemExit("no TIME_ZONES entries parsed")
+    return sorted(entries, key=lambda item: item[0])
+
+
+def c_string(value: str) -> str:
+    return '"' + value.replace("\\", "\\\\").replace('"', '\\"') + '"'
+
+
+def main() -> int:
+    entries = parse_time_zones(TZ_TSX.read_text(encoding="utf-8"))
+    max_format = max(len(fmt) for _, fmt in entries)
+
+    lines = [
+        "/* Auto-generated by scripts/generate_tz_zones.py — do not edit. */",
+        "#pragma once",
+        "",
+        "#include <stdlib.h>",
+        "#include <string.h>",
+        "",
+        "struct EmsespTzZone {",
+        "    const char * label;",
+        "    const char * format;",
+        "};",
+        "",
+        f"// Longest POSIX TZ value in the table is {max_format} chars.",
+        "static constexpr size_t EMSESP_TZ_ZONE_COUNT = "
+        f"{len(entries)};",
+        "static const EmsespTzZone EMSESP_TZ_ZONES[EMSESP_TZ_ZONE_COUNT] = {",
+    ]
+    for label, fmt in entries:
+        lines.append(f"    {{{c_string(label)}, {c_string(fmt)}}},")
+    lines += [
+        "};",
+        "",
+        "inline int emsesp_tz_zone_cmp(const void * key, const void * element) {",
+        "    return strcmp(static_cast<const char *>(key), static_cast<const EmsespTzZone *>(element)->label);",
+        "}",
+        "",
+        "// Returns the POSIX TZ string for an IANA label, or nullptr if unknown.",
+        "inline const char * emsesp_tz_format_for_label(const char * label) {",
+        "    if (label == nullptr || *label == '\\0') {",
+        "        return nullptr;",
+        "    }",
+        "    const auto * found = static_cast<const EmsespTzZone *>(",
+        "        bsearch(label, EMSESP_TZ_ZONES, EMSESP_TZ_ZONE_COUNT, sizeof(EmsespTzZone), emsesp_tz_zone_cmp));",
+        "    return found != nullptr ? found->format : nullptr;",
+        "}",
+        "",
+    ]
+    OUT_H.write_text("\n".join(lines), encoding="utf-8")
+    print(f"Wrote {OUT_H.relative_to(ROOT)} ({len(entries)} zones, max format {max_format})")
+    return 0
+
+
+if __name__ == "__main__":
+    sys.exit(main())