core&ui: support pasting image in editor

packages/hydrooj/package.json

@@ -1,6 +1,6 @@
 {
     "name": "hydrooj",
-    "version": "3.5.5",
+    "version": "3.5.6",
     "bin": "bin/hydrooj.js",
     "main": "src/loader",
     "module": "src/loader",

packages/hydrooj/src/handler/problem.ts

@@ -790,8 +790,20 @@ export class ProblemCreateHandler extends Handler {
         domainId: string, title: string, content: string, pid: string,
         hidden = false, difficulty = 0, tag: string[] = [], assign: string[] = [],
     ) {
-        if (pid && await problem.get(domainId, pid)) throw new BadRequestError('invalid pid');
+        if (pid && await problem.get(domainId, pid)) throw new BadRequestError('ProblemID already exists');
         const docId = await problem.add(domainId, pid, title, content, this.user._id, tag ?? [], hidden, assign);
+        const files = new Set(Array.from(content.matchAll(/file:\/\/([a-zA-Z0-9_-]+\.[a-zA-Z0-9]+)/g)).map((i) => i[1]));
+        const tasks = [];
+        for (const file of files) {
+            if (this.user._files.find((i) => i.name === file)) {
+                tasks.push(
+                    storage.rename(`user/${this.user._id}/${file}`, `problem/${domainId}/${docId}/additional_file/${file}`)
+                        .then(() => problem.addAdditionalFile(domainId, docId, file, '', true)),
+                    user.setById(this.user._id, { _files: this.user._files.filter((i) => i.name !== file) }),
+                );
+            }
+        }
+        await Promise.all(tasks);
         if (difficulty) await problem.edit(domainId, docId, { difficulty });
         this.response.body = { pid: pid || docId };
         this.response.redirect = this.url('problem_files', { pid: pid || docId });

packages/hydrooj/src/model/problem.ts

@@ -264,10 +264,10 @@ export class ProblemModel {
         await bus.emit('problem/delTestdata', domainId, pid, names);
     }
 
-    static async addAdditionalFile(domainId: string, pid: number, name: string, f: Readable | Buffer | string) {
+    static async addAdditionalFile(domainId: string, pid: number, name: string, f: Readable | Buffer | string, skipUpload = false) {
         const [[, fileinfo]] = await Promise.all([
             document.getSub(domainId, document.TYPE_PROBLEM, pid, 'additional_file', name),
-            storage.put(`problem/${domainId}/${pid}/additional_file/${name}`, f),
+            skipUpload || storage.put(`problem/${domainId}/${pid}/additional_file/${name}`, f),
         ]);
         const meta = await storage.getMeta(`problem/${domainId}/${pid}/additional_file/${name}`);
         const payload = { name, ...pick(meta, ['size', 'lastModified', 'etag']) };

packages/hydrooj/src/service/storage.ts

@@ -108,8 +108,13 @@ class StorageService {
                 accessKey: this.opts.accessKey,
                 secretKey: this.opts.secretKey,
             });
-            const exists = await this.client.bucketExists(this.opts.bucket);
-            if (!exists) await this.client.makeBucket(this.opts.bucket, this.opts.region);
+            try {
+                const exists = await this.client.bucketExists(this.opts.bucket);
+                if (!exists) await this.client.makeBucket(this.opts.bucket, this.opts.region);
+            } catch (e) {
+                // Some platform doesn't support bucketExists & makeBucket API.
+                // Ignore this error.
+            }
             this.replaceWithAlternativeUrlFor = {
                 user: parseAlternativeEndpointUrl(this.opts.endPointForUser),
                 judge: parseAlternativeEndpointUrl(this.opts.endPointForJudge),

packages/hydrooj/src/upgrade.ts

@@ -686,6 +686,7 @@ const scripts: UpgradeScript[] = [
     async function _59_60() {
         const langs = await system.get('hydrooj.langs');
         await system.set('hydrooj.langs', langs.replace(/\$\{dir\}/g, '/w').replace(/\$\{name\}/g, 'foo'));
+        return true;
     },
 ];