core: discussion views (fix #69)

packages/hydrooj/src/handler/discussion.ts

@@ -187,6 +187,12 @@ class DiscussionDetailHandler extends DiscussionHandler {
             if (drdoc.reply) uids.push(...drdoc.reply.map((drrdoc) => drrdoc.owner));
         }
         const udict = await user.getList(domainId, uids);
+        if (!dsdoc.view) {
+            await Promise.all([
+                discussion.inc(domainId, did, 'views', 1),
+                discussion.setStatus(domainId, did, this.user._id, { view: true }),
+            ]);
+        }
         const path = [
             ['Hydro', 'homepage'],
             ['discussion_main', 'discussion_main'],

packages/hydrooj/src/model/discussion.ts

@@ -9,6 +9,7 @@ import TaskModel from './task';
 import { DiscussionNodeNotFoundError, DocumentNotFoundError } from '../error';
 import { DiscussionReplyDoc, DiscussionTailReplyDoc, Document } from '../interface';
 import { buildProjection } from '../utils';
+import { NumberKeys } from '../typeutils';
 import * as bus from '../service/bus';
 
 export interface DiscussionDoc extends Document { }
@@ -112,6 +113,12 @@ export function edit(
     return document.set(domainId, document.TYPE_DISCUSSION, did, payload);
 }
 
+export function inc(
+    domainId: string, did: ObjectID, key: NumberKeys<DiscussionDoc>, value: number,
+): Promise<DiscussionDoc | null> {
+    return document.inc(domainId, document.TYPE_DISCUSSION, did, key, value);
+}
+
 export function del(domainId: string, did: ObjectID): Promise<never> {
     return Promise.all([
         document.deleteOne(domainId, document.TYPE_DISCUSSION, did),
@@ -221,6 +228,10 @@ export function getStatus(domainId: string, did: ObjectID, uid: number) {
     return document.getStatus(domainId, document.TYPE_DISCUSSION, did, uid);
 }
 
+export function setStatus(domainId: string, did: ObjectID, uid: number, $set) {
+    return document.setStatus(domainId, document.TYPE_DISCUSSION, did, uid, $set);
+}
+
 export function addNode(domainId: string, _id: string, category: string, args: any = {}) {
     return document.add(
         domainId, category, 1, document.TYPE_DISCUSSION_NODE,
@@ -327,6 +338,7 @@ global.Hydro.model.discussion = {
 
     add,
     get,
+    inc,
     edit,
     del,
     count,
@@ -344,6 +356,7 @@ global.Hydro.model.discussion = {
     react,
     setStar,
     getStatus,
+    setStatus,
     addNode,
     getNode,
     getNodes,