core: fix checkUpdate daily task (#302)

packages/hydrooj/src/script/checkUpdate.ts

@@ -15,7 +15,7 @@ async function getRemoteVersion(id: string) {
     }
 }
 
-export async function run() {
+export async function run(_: {}, report: Function) {
     const current = global.Hydro.version;
     const message = [''];
     for (const name in current) {
@@ -24,7 +24,7 @@ export async function run() {
         const remote = await getRemoteVersion(id);
         if (!remote) continue;
         const stored = system.get(`checkVersion.${id}`);
-        if (semver.lt(stored, remote)) {
+        if (!stored || semver.lt(stored, remote)) {
             system.set(`checkVersion.${id}`, remote);
             if (semver.lt(current[name], remote)) {
                 message.push(`${id}\t${current[name]} -> ${remote}`);
@@ -32,6 +32,7 @@ export async function run() {
         }
     }
     if (message.length > 1) {
+        report({ message: `Found ${message.length - 1} package${message.length > 2 ? 's have' : ' has'} new version` });
         MessageModel.sendNotification('Packages have new version: {0}', message.join('\n'));
     }
     return true;