core: allow pin training

packages/hydrooj/src/model/builtin.ts

@@ -85,6 +85,7 @@ export const PERM = {
     PERM_VIEW_TRAINING: 1n << 46n,
     PERM_CREATE_TRAINING: 1n << 47n,
     PERM_EDIT_TRAINING: 1n << 48n,
+    PERM_PIN_TRAINING: 1n << 63n,
     PERM_EDIT_TRAINING_SELF: 1n << 49n,
 
     // Ranking

packages/hydrooj/src/model/training.ts

@@ -114,7 +114,7 @@ export async function getList(domainId: string, tids: ObjectID[]) {
 }
 
 export const getMulti = (domainId: string, query: FilterQuery<TrainingDoc> = {}) =>
-    document.getMulti(domainId, document.TYPE_TRAINING, query).sort('_id', 1);
+    document.getMulti(domainId, document.TYPE_TRAINING, query).sort({ pin: -1, _id: -1 });
 
 global.Hydro.model.training = {
     getPids,