feat: autosave v1.89.29

libs/indexedDB.js

@@ -0,0 +1,82 @@
+function waitForIndexedDB() {
+  return new Promise(resolve => {
+    const timer = setInterval(() => {
+      if (window.indexedDB) {
+        clearInterval(timer);
+        resolve();
+      }
+    }, 100);
+  });
+}
+
+function getValue(key) {
+  return new Promise((resolve, reject) => {
+    if (!window.indexedDB) {
+      reject(new Error("indexedDB not supported"));
+      return;
+    }
+
+    waitForIndexedDB().then(() => {
+      const request = window.indexedDB.open("d2", 1);
+
+      request.onsuccess = event => {
+        const db = event.target.result;
+        const transaction = db.transaction("s", "readonly");
+        const objectStore = transaction.objectStore("s");
+        const getRequest = objectStore.get(key);
+
+        getRequest.onsuccess = event => {
+          const value = (event.target.result && event.target.result.v) || null;
+          resolve(value);
+        };
+
+        getRequest.onerror = event => {
+          reject(new Error("indexedDB request error"));
+          console.log(event);
+        };
+      };
+
+      request.onerror = event => {
+        reject(new Error("indexedDB request error"));
+        console.log(event);
+      };
+    });
+  });
+}
+
+function setValue(key, value) {
+  return new Promise((resolve, reject) => {
+    if (!window.indexedDB) {
+      reject(new Error("indexedDB not supported"));
+      return;
+    }
+
+    waitForIndexedDB().then(() => {
+      const request = window.indexedDB.open("d2", 1);
+
+      request.onsuccess = event => {
+        const db = event.target.result;
+        const transaction = db.transaction("s", "readwrite");
+        const objectStore = transaction.objectStore("s");
+
+        objectStore.put({k: key, v: value});
+
+        transaction.oncomplete = () => {
+          resolve();
+        };
+
+        transaction.onerror = event => {
+          reject(new Error("indexedDB request error"));
+          console.log(event);
+        };
+      };
+
+      request.onerror = event => {
+        reject(new Error("indexedDB request error"));
+        console.log(event);
+      };
+    });
+  });
+}
+
+window.ldb = {get: getValue, set: setValue};