web: added support for saving events

web/js/event.js

@@ -121,3 +121,51 @@ function event_parse_reaction(ev) {
 	}
 }
 
+async function model_save_events(model) {
+	function _events_save(ev, resolve, reject) {
+		const db = ev.target.result;
+		let tx = db.transaction("events", "readwrite");
+		let store = tx.objectStore("events");
+		for (const evid in model.all_events) {
+			store.put(model.all_events[evid]);
+		}
+		tx.oncomplete = (ev) => {
+			db.close();
+			resolve();
+			log_debug("saved events!");
+		};
+		tx.onerror = (ev) => {
+			db.close();
+			log_error("failed to save events");
+			reject(ev);
+		};
+	}
+	return dbcall(_events_save);
+}
+
+async function model_load_events(model, fn) {
+	function _events_load(ev, resolve, reject) {
+		const db = ev.target.result;
+		const tx = db.transaction("events", "readonly");
+		const store = tx.objectStore("events");
+		const cursor = store.openCursor();
+		cursor.onsuccess = (ev) => {
+			var cursor = ev.target.result;
+			if (cursor) {
+				fn(cursor.value);
+				cursor.continue();
+			} else {
+				db.close();
+				resolve();
+				log_debug("Successfully loaded events");
+			}
+		}
+		cursor.onerror = (ev) => {
+			db.close();
+			reject(ev);
+			log_error("Could not load events.");
+		};
+	}
+	return dbcall(_events_load);
+}
+