6 files changed, 118 insertions, 0 deletions
diff --git a/public/icons/icon-192.png b/public/icons/icon-192.png
new file mode 100644
index 0000000..1ba1e59
--- /dev/null
+++ b/public/icons/icon-192.png
diff --git a/public/icons/icon-512.png b/public/icons/icon-512.png
new file mode 100644
index 0000000..cb56518
--- /dev/null
+++ b/public/icons/icon-512.png
diff --git a/public/icons/icon.svg b/public/icons/icon.svg
new file mode 100644
index 0000000..9b105c1
--- /dev/null
+++ b/public/icons/icon.svg
@@ -0,0 +1,6 @@
+<svg xmlns="http://www.w3.org/2000/svg" width="512" height="512" viewBox="0 0 512 512">
+  <rect width="512" height="512" rx="96" fill="#1b5e20"/>
+  <path fill="#fff" d="M256 72c-63 0-114 51-114 114 0 42 23 79 57 99v53h-47l104 104 104-104h-47v-53c34-20 57-57 57-99 0-63-51-114-114-114z"/>
+  <rect x="238" y="340" width="36" height="104" rx="14" fill="#fff"/>
+  <rect x="140" y="430" width="232" height="20" rx="10" fill="#fff" opacity="0.85"/>
+</svg>
diff --git a/public/kodaira-data/parks/LICENSE.txt b/public/kodaira-data/parks/LICENSE.txt
new file mode 100644
index 0000000..6149587
--- /dev/null
+++ b/public/kodaira-data/parks/LICENSE.txt
@@ -0,0 +1,10 @@
+小平市の公園一覧 手入力ポリゴン
+
+作成: 安竹洋平（https://yasutakeyohei.com/）
+ライセンス: Creative Commons Attribution 4.0 International (CC BY 4.0)
+https://creativecommons.org/licenses/by/4.0/deed.ja
+
+注記:
+このポリゴンは正確な境界座標ではありません。参考としてご利用ください。
+出典として「安竹洋平（https://yasutakeyohei.com/）」を明示すれば、自由に利用できます。
+OSM由来のデータはOpenStreetMapのODbLライセンスです。
diff --git a/public/manifest.webmanifest b/public/manifest.webmanifest
new file mode 100644
index 0000000..91af084
--- /dev/null
+++ b/public/manifest.webmanifest
@@ -0,0 +1,32 @@
+{
+  "id": "/kodaira-data/parks/",
+  "name": "小平市の公園一覧",
+  "short_name": "小平市公園",
+  "description": "小平市内の公園・公共施設・近隣公園を検索できる一覧",
+  "lang": "ja",
+  "start_url": "/kodaira-data/parks/",
+  "scope": "/",
+  "display": "standalone",
+  "background_color": "#ffffff",
+  "theme_color": "#1b5e20",
+  "icons": [
+    {
+      "src": "/icons/icon-192.png",
+      "sizes": "192x192",
+      "type": "image/png",
+      "purpose": "any"
+    },
+    {
+      "src": "/icons/icon-512.png",
+      "sizes": "512x512",
+      "type": "image/png",
+      "purpose": "any"
+    },
+    {
+      "src": "/icons/icon-512.png",
+      "sizes": "512x512",
+      "type": "image/png",
+      "purpose": "maskable"
+    }
+  ]
+}
diff --git a/public/sw.js b/public/sw.js
new file mode 100644
index 0000000..99af941
--- /dev/null
+++ b/public/sw.js
@@ -0,0 +1,70 @@
+const CACHE = "kodaira-parks-v1";
+const APP_SHELL = [
+  "/kodaira-data/parks/",
+  "/manifest.webmanifest",
+  "/icons/icon-192.png",
+  "/icons/icon-512.png",
+];
+
+self.addEventListener("install", (event) => {
+  event.waitUntil(
+    caches
+      .open(CACHE)
+      .then((cache) => cache.addAll(APP_SHELL))
+      .then(() => self.skipWaiting()),
+  );
+});
+
+self.addEventListener("activate", (event) => {
+  event.waitUntil(
+    caches
+      .keys()
+      .then((keys) =>
+        Promise.all(keys.filter((key) => key !== CACHE).map((key) => caches.delete(key))),
+      )
+      .then(() => self.clients.claim()),
+  );
+});
+
+self.addEventListener("fetch", (event) => {
+  const request = event.request;
+  if (request.method !== "GET") return;
+
+  const url = new URL(request.url);
+  // OSMのタイルなど外部オリジンのものはキャッシュしない。
+  if (url.origin !== self.location.origin) return;
+
+  // ページ遷移はネットワーク優先。オフライン時はキャッシュ→公園ページ。
+  if (request.mode === "navigate") {
+    event.respondWith(
+      fetch(request)
+        .then((response) => {
+          const copy = response.clone();
+          caches.open(CACHE).then((cache) => cache.put(request, copy));
+          return response;
+        })
+        .catch(() =>
+          caches
+            .match(request)
+            .then((cached) => cached || caches.match("/kodaira-data/parks/")),
+        ),
+    );
+    return;
+  }
+
+  // それ以外はキャッシュ優先。取得できたらキャッシュを更新する。
+  event.respondWith(
+    caches.match(request).then((cached) => {
+      const network = fetch(request)
+        .then((response) => {
+          if (response.ok) {
+            const copy = response.clone();
+            caches.open(CACHE).then((cache) => cache.put(request, copy));
+          }
+          return response;
+        })
+        .catch(() => cached);
+      return cached || network;
+    }),
+  );
+});