rene
a600ca1dec
Geraetetest-Befunde Runde 2: - Giftkoeder verschwanden offline: /api/places kam aus dem SW-Cache (feste URL) und verhinderte den allFailed-Fallback, waehrend /api/poison?lat=... (Bbox-URL) scheiterte -> jetzt faellt jede Quelle EINZELN auf den letzten guten Stand zurueck (localStorage) + Merge aus dem Offline-Region-Snapshot - Region-Download speichert jetzt auch /api/poison + /api/lost der Gegend (p/_poison, p/_lost, anonym; MapOffline.alerts(kind,bbox) als Reader) — Sicherheitsdaten muessen auch am vorab gespeicherten Urlaubsort da sein - lost.js Offline-Pfad merged den Region-Snapshot in Cache- und Leer-Fall - Routen-Korridor war 'unsichtbar' (lag im schon gespeicherten Gebiet): nach dem Speichern werden die gespeicherten Bereiche blau auf der Detailkarte eingeblendet; Logik per Node-Stub-Test verifiziert Bump v1227
453 lines
22 KiB
JavaScript
453 lines
22 KiB
JavaScript
/* ============================================================
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BAN YARO — Offline-Vektorkacheln
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Lädt einen Bereich aus der Remote-PMTiles (dach.pmtiles) als einzelne MVT-Tiles
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in IndexedDB und bedient MapLibre offline daraus über das `byt://`-Protokoll.
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Plan/Architektur: docs/OFFLINE_MAPS_PLAN.md
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============================================================ */
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window.MapOffline = (function () {
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'use strict';
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var DB_NAME = 'by-offline-tiles', STORE = 'tiles', META = 'meta', DB_VER = 1;
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var MAXZOOM = 14; // unsere pmtiles enden bei z14 (Overzoom darüber)
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var _db = null, _pm = null;
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// Hinweis: pmtiles.getZxy() liefert die Tiles BEREITS dekomprimiert (rohe MVT-Protobufs) →
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// wir speichern/servieren sie direkt, kein gunzip. Dadurch ist die IndexedDB-Größe ~2,5× die
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// komprimierte pmtiles-Extract-Größe (5 km ≈ ~16 MB statt 6,4 MB) — fürs Handy unkritisch.
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// ---- IndexedDB ----
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function _open() {
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if (_db) return Promise.resolve(_db);
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return new Promise(function (res, rej) {
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var r = indexedDB.open(DB_NAME, DB_VER);
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r.onupgradeneeded = function () {
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var d = r.result;
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if (!d.objectStoreNames.contains(STORE)) d.createObjectStore(STORE);
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if (!d.objectStoreNames.contains(META)) d.createObjectStore(META);
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};
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r.onsuccess = function () { _db = r.result; res(_db); };
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r.onerror = function () { rej(r.error); };
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});
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}
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function _req(store, mode, make) {
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return _open().then(function (d) { return new Promise(function (res, rej) {
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var tx = d.transaction(store, mode), rq = make(tx.objectStore(store));
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tx.oncomplete = function () { res(rq ? rq.result : undefined); };
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tx.onerror = function () { rej(tx.error); };
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}); });
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}
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var _get = function (k) { return _req(STORE, 'readonly', function (os) { return os.get(k); }); };
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var _put = function (k, v) { return _req(STORE, 'readwrite', function (os) { os.put(v, k); }); };
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var _count = function () { return _req(STORE, 'readonly', function (os) { return os.count(); }); };
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var _metaGet = function (k) { return _req(META, 'readonly', function (os) { return os.get(k); }); };
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var _metaPut = function (k, v) { return _req(META, 'readwrite', function (os) { os.put(v, k); }); };
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// ---- Remote-PMTiles ----
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function _pmInst() { if (!_pm) _pm = new pmtiles.PMTiles(MapGLStyle.tilesUrl()); return _pm; }
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// MVT-Bytes (Uint8Array) für z/x/y — IndexedDB zuerst, sonst remote (online), sonst null.
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function tile(z, x, y) {
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return _get(z + '/' + x + '/' + y).then(function (hit) {
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if (hit) return hit instanceof Uint8Array ? hit : new Uint8Array(hit);
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return _pmInst().getZxy(z, x, y).then(function (r) {
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return (r && r.data) ? new Uint8Array(r.data) : null; // getZxy ist bereits dekomprimiert
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}).catch(function () {
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_noteRemoteMiss(); // Funkloch-Signal: echter Fetch-Fehler bei aktivem GPS
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return null; // offline + nicht gespeichert → leeres Tile
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});
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});
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}
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// MapLibre-Protokolle registrieren (idempotent):
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// byt://t/{z}/{x}/{y} → Vektorkachel (MVT)
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// byt://f/{fontstack}/{range} → Glyph-PBF (fontstack ggf. URL-encodiert, je nach MapLibre-Version)
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function registerProtocol() {
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if (registerProtocol._done || typeof maplibregl === 'undefined') return;
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registerProtocol._done = true;
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maplibregl.addProtocol('byt', function (params) {
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var ret = function (u) {
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if (!u) return { data: new ArrayBuffer(0) };
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return { data: u.buffer.slice(u.byteOffset, u.byteOffset + u.byteLength) };
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};
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var t = /byt:\/\/t\/(\d+)\/(\d+)\/(\d+)/.exec(params.url);
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if (t) return tile(+t[1], +t[2], +t[3]).then(ret);
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var f = /byt:\/\/f\/([^/]+)\/(\d+-\d+)/.exec(params.url);
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if (f) return glyph(decodeURIComponent(f[1]), f[2]).then(ret);
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return Promise.resolve({ data: new ArrayBuffer(0) });
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});
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}
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// ---- Slippy-Tile-Mathe ----
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function _x(lon, z) { return Math.floor((lon + 180) / 360 * Math.pow(2, z)); }
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function _y(lat, z) {
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var r = lat * Math.PI / 180;
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return Math.floor((1 - Math.log(Math.tan(r) + 1 / Math.cos(r)) / Math.PI) / 2 * Math.pow(2, z));
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}
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function _bboxAround(lat, lon, radiusKm) {
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var dLat = radiusKm / 111, dLon = radiusKm / (111 * Math.cos(lat * Math.PI / 180));
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return { south: lat - dLat, west: lon - dLon, north: lat + dLat, east: lon + dLon };
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}
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// Glyphs (Open Sans Regular/Semibold, Latin + Latin-Extended) in IndexedDB persistieren
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// (Key-Präfix 'f/' im Tiles-Store, kein Schema-Bump) — überlebt App-Updates, anders als der
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// SW-Cache, der beim Update gepurged wird. Offline serviert übers byt://f/-Protokoll.
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// KRITISCH: ohne Glyphs lässt MapLibre offline die GANZE Kachel fallen (nicht nur die Labels) → leer.
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// 0-255 + 256-511 deckt DE/FR/PL/CZ/IT-Sonderzeichen ab.
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var FONTS = ['Open Sans Regular', 'Open Sans Semibold'], RANGES = ['0-255', '256-511'];
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function _glyphUrl(font, range) { return '/fonts/' + encodeURIComponent(font) + '/' + range + '.pbf'; }
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function _cacheGlyphs() {
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var bytes = 0, jobs = [];
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FONTS.forEach(function (f) { RANGES.forEach(function (rg) {
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jobs.push(fetch(_glyphUrl(f, rg))
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.then(function (r) { return r.ok ? r.arrayBuffer() : null; })
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.then(function (b) {
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if (!b) return;
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bytes += b.byteLength;
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return _put('f/' + f + '/' + rg, new Uint8Array(b));
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})
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.catch(function () {}));
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}); });
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return Promise.all(jobs).then(function () { return bytes; });
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}
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// Glyph-Bytes für fontstack/range — IndexedDB zuerst, sonst remote (online), sonst null.
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function glyph(font, range) {
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return _get('f/' + font + '/' + range).then(function (hit) {
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if (hit) return hit instanceof Uint8Array ? hit : new Uint8Array(hit);
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return fetch(_glyphUrl(font, range))
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.then(function (r) { return r.ok ? r.arrayBuffer() : null; })
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.then(function (b) { return b ? new Uint8Array(b) : null; })
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.catch(function () { return null; });
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});
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}
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// POI-Marker der Region mitspeichern (Key-Präfix 'p/<type>' im Tiles-Store) — sonst steht die
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// Offline-Karte ohne Marker da (Gerätetest 2026-06-06). Quelle: /api/osm/pois (liest die lokale
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// osm_pois-DB, fast=true). Typen = Werte von OSM_LAYER_MAP in pages/map.js (synchron halten).
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var POI_TYPES = ['waste_basket', 'dog_park', 'drinking_water', 'tierarzt', 'hundesalon', 'shop',
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'restaurant', 'bank', 'giftkoeder', 'kotbeutel', 'gefahr', 'parkplatz',
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'treffpunkt', 'sonstiges', 'hotel'];
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// Frische Liste mit Bestand mergen (per id) — eine zweite Region (Urlaubsort) darf die erste
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// nicht löschen. Liefert die Anzahl frischer Einträge.
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function _mergeStore(key, fresh) {
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if (!fresh || !fresh.length) return Promise.resolve(0);
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return _get(key).then(function (old) {
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var merged = fresh;
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if (old && old.length) {
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var seen = {};
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fresh.forEach(function (p) { seen[p.id] = true; });
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merged = fresh.concat(old.filter(function (p) { return !seen[p.id]; }));
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}
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return _put(key, merged).then(function () { return fresh.length; });
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});
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}
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function _cachePois(bbox) {
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var total = 0;
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var jobs = POI_TYPES.map(function (type) {
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var params = new URLSearchParams({ type: type, fast: 'true',
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south: bbox.south, west: bbox.west, north: bbox.north, east: bbox.east });
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return fetch('/api/osm/pois?' + params)
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.then(function (r) { return r.ok ? r.json() : null; })
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.then(function (fresh) { return _mergeStore('p/' + type, fresh); })
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.then(function (n) { total += n; })
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.catch(function () {});
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});
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// Sicherheitsdaten MÜSSEN offline da sein (René 2026-06-07): Giftköder-Alarme
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// (/api/poison, Radius in m) + vermisste Hunde (/api/lost, Radius in km) — beide anonym.
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var midLat = (bbox.south + bbox.north) / 2, midLon = (bbox.west + bbox.east) / 2;
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var radiusKm = Math.max(
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(bbox.north - bbox.south) * 111 / 2,
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(bbox.east - bbox.west) * 111 * Math.cos(midLat * Math.PI / 180) / 2, 1);
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jobs.push(fetch('/api/poison?lat=' + midLat + '&lon=' + midLon + '&radius=' + Math.round(radiusKm * 1000))
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.then(function (r) { return r.ok ? r.json() : null; })
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.then(function (fresh) { return _mergeStore('p/_poison', fresh); })
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.then(function (n) { total += n; })
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.catch(function () {}));
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jobs.push(fetch('/api/lost?lat=' + midLat + '&lon=' + midLon + '&radius_km=' + Math.ceil(radiusKm))
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.then(function (r) { return r.ok ? r.json() : null; })
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.then(function (fresh) { return _mergeStore('p/_lost', fresh); })
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.then(function (n) { total += n; })
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.catch(function () {}));
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return Promise.all(jobs).then(function () { return total; });
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}
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// Gespeicherte Sicherheits-Alarme ('poison' | 'lost') im Bbox-Ausschnitt — Offline-Fallback.
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function alerts(kind, bbox) {
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return _get('p/_' + kind).then(function (list) {
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if (!list || !list.length) return [];
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return list.filter(function (p) {
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return p.lat >= bbox.south && p.lat <= bbox.north && p.lon >= bbox.west && p.lon <= bbox.east;
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});
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}).catch(function () { return []; });
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}
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// Gespeicherte POIs eines Typs im Bbox-Ausschnitt — Offline-Fallback für die Karten-Marker.
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function pois(type, bbox) {
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return _get('p/' + type).then(function (list) {
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if (!list || !list.length) return [];
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return list.filter(function (p) {
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return p.lat >= bbox.south && p.lat <= bbox.north && p.lon >= bbox.west && p.lon <= bbox.east;
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});
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}).catch(function () { return []; });
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}
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// Kachelbreite (km) auf Zoom z bei lat — für Ring↔Radius-Umrechnung.
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function _tileKm(z, lat) { return 40075 * Math.cos(lat * Math.PI / 180) / Math.pow(2, z); }
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// Kachel-Liste laden (Concurrency 6) — addiert auf state {done,bytes,stored}, ruft onTick alle 8 Tiles.
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function _fetchTiles(list, state, onTick) {
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var i = 0, CONC = 6;
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function next() {
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if (i >= list.length) return Promise.resolve();
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var t = list[i++], key = t[0] + '/' + t[1] + '/' + t[2];
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return _pmInst().getZxy(t[0], t[1], t[2]).then(function (r) {
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if (r && r.data) { var u = new Uint8Array(r.data); state.bytes += u.byteLength; state.stored++; return _put(key, u); }
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}).catch(function () {}).then(function () {
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state.done++;
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if (onTick && state.done % 8 === 0) onTick();
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return next();
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});
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}
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var w = []; for (var k = 0; k < CONC; k++) w.push(next());
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return Promise.all(w);
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}
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// Gespeichertes Gebiet in der Regions-Liste verbuchen ('region' = letztes, Back-Compat).
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function _addRegion(region) {
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return _metaGet('regions').then(function (list) {
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list = list || [];
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list.push(region);
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if (list.length > 30) list = list.slice(-30);
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return _metaPut('regions', list);
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}).then(function () { return _metaPut('region', region); });
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}
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// Gebiet um lat/lon BUDGET-getrieben laden (Modell René 2026-06-07): z14-Ringe um den
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// Standort expandieren (+ Eltern-Kacheln z10–13), bis budgetMB GESPEICHERTE Bytes erreicht
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// sind — deckt in der Stadt einen kleineren, auf dem Land einen größeren Bereich ab
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// (dort sind die Funklöcher). Basis-Zooms 0–9 sind immer dabei (winzig).
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// opts {budgetMB:5, maxRadiusKm:25, onProgress({bytes,budget,done,radiusKm})}.
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// Liefert {tiles, bytes, pois, radiusKm}.
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function downloadAround(lat, lon, opts) {
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if (typeof opts === 'number') opts = {}; // alte Signatur (lat, lon, radiusKm) → Default-Budget
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opts = opts || {};
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var budget = (opts.budgetMB || 5) * 1048576;
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var maxKm = opts.maxRadiusKm || 25;
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var cx = _x(lon, MAXZOOM), cy = _y(lat, MAXZOOM);
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var kmPerTile = _tileKm(MAXZOOM, lat);
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var maxRing = Math.max(1, Math.ceil(maxKm / kmPerTile));
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var seen = {}, state = { done: 0, bytes: 0, stored: 0 };
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var tick = function (radiusKm) {
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if (opts.onProgress) opts.onProgress({ bytes: state.bytes, budget: budget, done: state.done, radiusKm: radiusKm });
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};
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// Basis-Zooms 0–9 über die maximale Bbox.
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var base = [], bb = _bboxAround(lat, lon, maxKm);
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for (var z = 0; z <= 9; z++) {
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var x0 = _x(bb.west, z), x1 = _x(bb.east, z), y0 = _y(bb.north, z), y1 = _y(bb.south, z);
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for (var x = x0; x <= x1; x++) for (var y = y0; y <= y1; y++) {
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var k = z + '/' + x + '/' + y;
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if (!seen[k]) { seen[k] = 1; base.push([z, x, y]); }
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}
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}
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// Ring r um die Zentrums-Kachel (z14) + zugehörige Eltern z10–13.
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function ringTiles(r) {
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var list = [];
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var push = function (z2, x2, y2) {
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if (x2 < 0 || y2 < 0 || x2 >= Math.pow(2, z2) || y2 >= Math.pow(2, z2)) return;
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var k2 = z2 + '/' + x2 + '/' + y2;
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if (!seen[k2]) { seen[k2] = 1; list.push([z2, x2, y2]); }
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};
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for (var x2 = cx - r; x2 <= cx + r; x2++) for (var y2 = cy - r; y2 <= cy + r; y2++) {
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if (Math.max(Math.abs(x2 - cx), Math.abs(y2 - cy)) !== r) continue;
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push(MAXZOOM, x2, y2);
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for (var pz = 13; pz >= 10; pz--) push(pz, x2 >> (MAXZOOM - pz), y2 >> (MAXZOOM - pz));
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}
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return list;
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}
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var coveredRing = 0;
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function nextRing(r) {
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if (r > maxRing || state.bytes >= budget) return Promise.resolve();
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return _fetchTiles(ringTiles(r), state, function () { tick(r * kmPerTile); }).then(function () {
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coveredRing = r;
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tick(r * kmPerTile);
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return nextRing(r + 1);
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});
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}
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var radiusKm = 0, poiCount = 0;
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return _fetchTiles(base, state, function () { tick(0); })
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.then(function () { return nextRing(0); })
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.then(function () {
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radiusKm = Math.max(1, Math.round(coveredRing * kmPerTile * 10) / 10);
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return _cacheGlyphs(); // Glyphs mitcachen (sonst offline kein Render)
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})
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.then(function (gb) { state.bytes += gb; return _cachePois(_bboxAround(lat, lon, radiusKm)); })
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.then(function (pc) {
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poiCount = pc;
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return _addRegion({ lat: lat, lon: lon, radiusKm: radiusKm, tiles: state.stored,
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bytes: state.bytes, pois: poiCount, savedAt: Date.now() });
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})
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.then(function () { return { tiles: state.stored, bytes: state.bytes, pois: poiCount, radiusKm: radiusKm }; });
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}
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// ---- Funkloch-Gedächtnis ----------------------------------------------------
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// „Wo verliere ich Netz" = Aufenthaltsorte → bleibt KOMPLETT LOKAL (IndexedDB),
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// wird nie hochgeladen. Signal = echte Tile-Fetch-Fehler bei aktivem GPS
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// (NICHT navigator.onLine — das lügt bei Captive-Portal/Schwachempfang).
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var _gps = null, _lastZoneNote = 0;
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function setGps(pos) { _gps = pos; } // {lat,lon} während aktiver Aufzeichnung, sonst null
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function _distKm(aLat, aLon, bLat, bLon) {
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var dLat = (bLat - aLat) * 111, dLon = (bLon - aLon) * 111 * Math.cos(aLat * Math.PI / 180);
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return Math.sqrt(dLat * dLat + dLon * dLon);
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}
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function _noteRemoteMiss() {
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if (!_gps) return;
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var now = Date.now();
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if (now - _lastZoneNote < 120000) return; // max. 1 Eintrag / 2 Min
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_lastZoneNote = now;
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markDeadZone(_gps.lat, _gps.lon);
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}
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// Funkloch merken (Dedupe: keine zweite Zone im Umkreis von 2 km, Cap 50).
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function markDeadZone(lat, lon) {
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return _metaGet('deadzones').then(function (zones) {
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zones = zones || [];
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if (zones.some(function (z) { return _distKm(z.lat, z.lon, lat, lon) < 2; })) return;
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zones.push({ lat: lat, lon: lon, ts: Date.now(), filled: false });
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if (zones.length > 50) zones = zones.slice(-50);
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return _metaPut('deadzones', zones);
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}).catch(function () {});
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}
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// Offene Funkloch-Zonen budget-getrieben nachladen (nur online sinnvoll).
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// Dort wo Netz verfügbar ist, braucht man keine Offline-Karten — gespeichert
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// wird gezielt da, wo es ausfiel. Liefert die Anzahl gefüllter Zonen.
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var _autofillActive = false;
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function autoFillDeadZones() {
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if (_autofillActive || !navigator.onLine) return Promise.resolve(0);
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||
_autofillActive = true;
|
||
var filled = 0;
|
||
return _metaGet('deadzones').then(function (zones) {
|
||
zones = zones || [];
|
||
var open = zones.filter(function (z) { return !z.filled; });
|
||
if (!open.length) return 0;
|
||
var chain = Promise.resolve();
|
||
open.forEach(function (z) {
|
||
chain = chain.then(function () {
|
||
return downloadAround(z.lat, z.lon, { budgetMB: 5 }).then(function (res) {
|
||
if (res.bytes > 0) { z.filled = true; filled++; }
|
||
}).catch(function () {});
|
||
});
|
||
});
|
||
return chain.then(function () { return _metaPut('deadzones', zones); })
|
||
.then(function () { return filled; });
|
||
}).then(function (n) { _autofillActive = false; return n; },
|
||
function () { _autofillActive = false; return 0; });
|
||
}
|
||
|
||
// ---- Routen-Korridor ---------------------------------------------------------
|
||
// Kacheln ±bufferKm um den Track (z14 + Eltern z10–13 + Basis 0–9) + Marker der
|
||
// Korridor-Bbox — für mehrtägige Unternehmungen entlang einer Route.
|
||
// track = [{lat,lon},...]; opts {bufferKm:1, capMB:50, name, onProgress({bytes,done,total})}.
|
||
function downloadCorridor(track, opts) {
|
||
opts = opts || {};
|
||
if (!track || track.length < 2) return Promise.reject(new Error('Kein GPS-Track'));
|
||
var buffer = opts.bufferKm || 1, cap = (opts.capMB || 50) * 1048576;
|
||
var seen = {}, list = [];
|
||
var push = function (z, x, y) {
|
||
if (x < 0 || y < 0 || x >= Math.pow(2, z) || y >= Math.pow(2, z)) return;
|
||
var k = z + '/' + x + '/' + y;
|
||
if (!seen[k]) { seen[k] = 1; list.push([z, x, y]); }
|
||
};
|
||
var s = 90, w = 180, n = -90, e = -180;
|
||
track.forEach(function (p) {
|
||
if (p.lat < s) s = p.lat; if (p.lat > n) n = p.lat;
|
||
if (p.lon < w) w = p.lon; if (p.lon > e) e = p.lon;
|
||
var d = Math.ceil(buffer / _tileKm(MAXZOOM, p.lat));
|
||
var cx = _x(p.lon, MAXZOOM), cy = _y(p.lat, MAXZOOM);
|
||
for (var x = cx - d; x <= cx + d; x++) for (var y = cy - d; y <= cy + d; y++) {
|
||
push(MAXZOOM, x, y);
|
||
for (var pz = 13; pz >= 10; pz--) push(pz, x >> (MAXZOOM - pz), y >> (MAXZOOM - pz));
|
||
}
|
||
});
|
||
var latMid = (s + n) / 2;
|
||
var bb = { south: s - buffer / 111, north: n + buffer / 111,
|
||
west: w - buffer / (111 * Math.cos(latMid * Math.PI / 180)),
|
||
east: e + buffer / (111 * Math.cos(latMid * Math.PI / 180)) };
|
||
for (var z2 = 0; z2 <= 9; z2++) {
|
||
var x0 = _x(bb.west, z2), x1 = _x(bb.east, z2), y0 = _y(bb.north, z2), y1 = _y(bb.south, z2);
|
||
for (var x2 = x0; x2 <= x1; x2++) for (var y2 = y0; y2 <= y1; y2++) push(z2, x2, y2);
|
||
}
|
||
|
||
var state = { done: 0, bytes: 0, stored: 0 }, total = list.length, poiCount = 0;
|
||
// In 64er-Blöcken laden → zwischen den Blöcken greift der Speicher-Cap.
|
||
function chunkLoop(idx) {
|
||
if (idx >= list.length || state.bytes >= cap) return Promise.resolve();
|
||
return _fetchTiles(list.slice(idx, idx + 64), state, function () {
|
||
if (opts.onProgress) opts.onProgress({ bytes: state.bytes, done: state.done, total: total });
|
||
}).then(function () { return chunkLoop(idx + 64); });
|
||
}
|
||
return chunkLoop(0)
|
||
.then(function () { return _cacheGlyphs(); })
|
||
.then(function (gb) { state.bytes += gb; return _cachePois(bb); })
|
||
.then(function (pc) {
|
||
poiCount = pc;
|
||
return _addRegion({ type: 'korridor', name: opts.name || null, lat: track[0].lat, lon: track[0].lon,
|
||
tiles: state.stored, bytes: state.bytes, pois: poiCount, savedAt: Date.now() });
|
||
})
|
||
.then(function () { return { tiles: state.stored, bytes: state.bytes, pois: poiCount, capped: state.bytes >= cap }; });
|
||
}
|
||
|
||
// ---- Coverage-Layer ----------------------------------------------------------
|
||
// GeoJSON der gespeicherten z14-Kacheln — zeigt auf der Karte, welche Bereiche offline da sind.
|
||
function _tile2lat(y, z) {
|
||
var m = Math.PI - 2 * Math.PI * y / Math.pow(2, z);
|
||
return 180 / Math.PI * Math.atan(0.5 * (Math.exp(m) - Math.exp(-m)));
|
||
}
|
||
function coverage() {
|
||
var re = new RegExp('^' + MAXZOOM + '/(\\d+)/(\\d+)$');
|
||
return _req(STORE, 'readonly', function (os) { return os.getAllKeys(); }).then(function (keys) {
|
||
var feats = [];
|
||
(keys || []).forEach(function (k) {
|
||
var m = re.exec(k);
|
||
if (!m) return;
|
||
var x = +m[1], y = +m[2], n2 = Math.pow(2, MAXZOOM);
|
||
var west = x / n2 * 360 - 180, east = (x + 1) / n2 * 360 - 180;
|
||
var north = _tile2lat(y, MAXZOOM), south = _tile2lat(y + 1, MAXZOOM);
|
||
feats.push({ type: 'Feature', properties: {}, geometry: { type: 'Polygon',
|
||
coordinates: [[[west, south], [east, south], [east, north], [west, north], [west, south]]] } });
|
||
});
|
||
return { type: 'FeatureCollection', features: feats };
|
||
});
|
||
}
|
||
|
||
function stats() {
|
||
return _count().then(function (count) {
|
||
return _metaGet('regions').then(function (regions) {
|
||
return _metaGet('region').then(function (meta) {
|
||
return { count: count, meta: meta || null, regions: regions || [] };
|
||
});
|
||
});
|
||
});
|
||
}
|
||
function hasRegion() { return stats().then(function (s) { return s.count > 0; }).catch(function () { return false; }); }
|
||
function clear() {
|
||
return _req(STORE, 'readwrite', function (os) { os.clear(); })
|
||
.then(function () { return _req(META, 'readwrite', function (os) { os.clear(); }); });
|
||
}
|
||
|
||
return {
|
||
registerProtocol: registerProtocol, downloadAround: downloadAround, downloadCorridor: downloadCorridor,
|
||
tile: tile, glyph: glyph, pois: pois, alerts: alerts, coverage: coverage,
|
||
setGps: setGps, markDeadZone: markDeadZone, autoFillDeadZones: autoFillDeadZones,
|
||
stats: stats, hasRegion: hasRegion, clear: clear, MAXZOOM: MAXZOOM,
|
||
};
|
||
})();
|