Close sqlite database when user quits

Fixes #2178

src/client.js

@@ -537,6 +537,10 @@ Client.prototype.quit = function(signOut) {
 
 		network.destroy();
 	});
+
+	if (this.messageStorage) {
+		this.messageStorage.close();
+	}
 };
 
 Client.prototype.clientAttach = function(socketId, token) {

src/plugins/sqlite.js

@@ -35,7 +35,7 @@ class MessageStorage {
 
 		this.isEnabled = true;
 
-		this.database = new sqlite3.cached.Database(sqlitePath);
+		this.database = new sqlite3.Database(sqlitePath);
 		this.database.serialize(() => {
 			schema.forEach((line) => this.database.run(line));
 
@@ -68,6 +68,22 @@ class MessageStorage {
 		});
 	}
 
+	close(callback) {
+		if (!this.isEnabled) {
+			return;
+		}
+
+		this.database.close((err) => {
+			if (err) {
+				log.error(`Failed to close sqlite database: ${err}`);
+			}
+
+			if (callback) {
+				callback(err);
+			}
+		});
+	}
+
 	index(network, channel, msg) {
 		if (!this.isEnabled) {
 			return;

test/plugins/sqlite.js

@@ -29,18 +29,13 @@ describe("SQLite Message Storage", function() {
 		});
 	});
 
-	it("should create database file", function(done) {
+	it("should create database file", function() {
 		expect(store.isEnabled).to.be.false;
 		expect(fs.existsSync(expectedPath)).to.be.false;
 
 		store.enable("testUser");
 
 		expect(store.isEnabled).to.be.true;
-
-		store.database.serialize(() => {
-			expect(fs.existsSync(expectedPath)).to.be.true;
-			done();
-		});
 	});
 
 	it("should create tables", function(done) {
@@ -103,4 +98,12 @@ describe("SQLite Message Storage", function() {
 			done();
 		});
 	});
+
+	it("should close database", function(done) {
+		store.close((err) => {
+			expect(err).to.be.null;
+			expect(fs.existsSync(expectedPath)).to.be.true;
+			done();
+		});
+	});
 });