core: fix sortable handle

packages/hydrooj/package.json

@@ -1,6 +1,6 @@
 {
     "name": "hydrooj",
-    "version": "3.1.41",
+    "version": "3.1.42",
     "bin": "bin/hydrooj.js",
     "main": "src/loader",
     "module": "src/loader",

packages/hydrooj/src/model/problem.ts

@@ -22,7 +22,7 @@ export interface ProblemDoc extends Document { }
 export type Field = keyof ProblemDoc;
 
 function sortable(source: string) {
-    return source.replace(/(\d+)/g, (str) => '0'.repeat(6 - str.length) + str);
+    return source.replace(/(\d+)/g, (str) => (str.length >= 6 ? str : ('0'.repeat(6 - str.length) + str)));
 }
 
 export class ProblemModel {

packages/hydrooj/src/upgrade.ts

@@ -652,7 +652,7 @@ const scripts: UpgradeScript[] = [
         const _FRESH_INSTALL_IGNORE = 1;
         const bulk = db.collection('document').initializeUnorderedBulkOp();
         function sortable(source: string) {
-            return source.replace(/(\d+)/g, (str) => '0'.repeat(6 - str.length) + str);
+            return source.replace(/(\d+)/g, (str) => (str.length >= 6 ? str : ('0'.repeat(6 - str.length) + str)));
         }
         await iterateAllProblem(['pid', '_id'], async (pdoc) => {
             bulk.find({ _id: pdoc._id }).updateOne({ $set: { sort: sortable(pdoc.pid || `P${pdoc.docId}`) } });