elastic: add skip limit

packages/elastic/package.json

@@ -1,6 +1,6 @@
 {
     "name": "@hydrooj/elastic-search",
-    "version": "1.0.3",
+    "version": "1.0.4",
     "main": "package.json",
     "repository": "https://github.com/hydro-dev/Hydro",
     "author": "undefined <i@undefined.moe>",

packages/elastic/script.ts

@@ -32,8 +32,9 @@ bus.on('problem/del', async (domainId, docId) => {
 });
 
 global.Hydro.lib.problemSearch = async (domainId, q, opts) => {
+    const allowedSize = system.get('elasic.indexSize');
     const size = opts?.limit || system.get('pagination.problem');
-    const from = opts?.skip || 0;
+    const from = Math.min(allowedSize - size, opts?.skip || 0);
     const union = await DomainModel.getUnion(domainId);
     const domainIds = [domainId, ...(union?.union || [])];
     const res = await client.search({

packages/elastic/setting.yaml

@@ -1,2 +1,4 @@
 url:
   value: http://127.0.0.1:9200
+indexSize:
+  value: 10000