center: use different field for version downgrade

packages/center/index.ts

@@ -1,5 +1,6 @@
 import assert from 'assert';
 import crypto from 'crypto-js';
+import { lt } from 'semver';
 import {
     db, definePlugin, ForbiddenError, Handler, post, Types, yaml,
 } from 'hydrooj';
@@ -43,8 +44,7 @@ class DataReportHandler extends Handler {
             throw new ForbiddenError();
         }
         const old = await coll.findOne({ _id: installId });
-        await coll.updateOne({ _id: installId }, {
+        const setPayload = {
-            $set: {
             version: payload.version,
             name: payload.name,
             url: payload.url,
@@ -62,11 +62,29 @@ class DataReportHandler extends Handler {
             recordCount: payload.recordCount,
             sandbox: payload.sandbox,
             dbVersion: payload.dbVersion,
+        };
+        if (old && lt(payload.version, old.version)) {
+            await coll.updateOne(
+                { _id: installId },
+                {
+                    $push: {
+                        ips: this.request.ip,
                     },
+                    $set: { downgrade: setPayload },
+                },
+            );
+        } else {
+            await coll.updateOne({ _id: installId }, {
+                $push: {
+                    ips: this.request.ip,
+                },
+                $set: setPayload,
                 $setOnInsert: { init: new Date() },
             }, { upsert: true });
+        }
         this.ctx.emit('center/report', this, installId, old, payload);
-        this.response.body = { code: 0 };
+        // TODO deliver messages
+        this.response.body = { code: 0, u: lt(payload.version, old.version) };
     }
 }
 

packages/center/package.json

@@ -1,6 +1,6 @@
 {
     "name": "@hydrooj/center",
-    "version": "0.2.3",
+    "version": "0.2.4",
     "main": "index.ts",
     "repository": "https://github.com/hydro-dev/Hydro.git",
     "author": "undefined <i@undefined.moe>",
@@ -10,6 +10,7 @@
         "hydrooj": "*"
     },
     "dependencies": {
-        "crypto-js": "^4.1.1"
+        "crypto-js": "^4.1.1",
+        "semver": "^7.3.8"
     }
 }