[sandbox] Add C# for sandbox

sandbox/Dockerfile

@@ -5,41 +5,25 @@ WORKDIR /app
 RUN apt-get update
 
 RUN apt-get install curl -y
-
 RUN apt-get install -y ca-certificates curl gnupg
 RUN mkdir -p /etc/apt/keyrings
 RUN curl -fsSL https://deb.nodesource.com/gpgkey/nodesource-repo.gpg.key | gpg --dearmor -o /etc/apt/keyrings/nodesource.gpg
 ENV NODE_MAJOR=18
 RUN echo "deb [signed-by=/etc/apt/keyrings/nodesource.gpg] https://deb.nodesource.com/node_$NODE_MAJOR.x nodistro main" | tee /etc/apt/sources.list.d/nodesource.list
 RUN apt-get update
-RUN apt-get install nodejs -y
 
-RUN apt-get install git -y
+RUN apt-get install nodejs git openjdk-17-jdk-headless dotnet-sdk-7.0 -y
+
+ENV DOTNET_NOLOGO=true
+ENV DOTNET_SKIP_FIRST_TIME_EXPERIENCE=true
 
 RUN git config --global user.name "Admin"
-
 RUN git config --global user.email noemail@example.com
 
-WORKDIR /opt
-
-RUN apt-get install wget -y
-
-RUN wget -O java.tar.gz https://github.com/adoptium/temurin17-binaries/releases/download/jdk-17.0.7%2B7/OpenJDK17U-jdk_x64_linux_hotspot_17.0.7_7.tar.gz
-
-RUN tar -xzvf java.tar.gz
-
-RUN rm java.tar.gz
-
-ENV JAVA_PATH=/opt/jdk-17.0.7+7/bin
-
 WORKDIR /app
 
 COPY package*.json ./
-
 RUN npm install
-
 COPY . .
-
 RUN npm run build
-
 CMD ["node", "build"]

sandbox/package-lock.json

@@ -12,6 +12,7 @@
 				"dotenv": "^16.3.1",
 				"fs-extra": "^11.2.0",
 				"simple-git": "^3.22.0",
+				"tree-kill": "^1.2.2",
 				"url-join": "^5.0.0",
 				"zod": "^3.22.4"
 			},
@@ -153,6 +154,14 @@
 				"url": "https://github.com/steveukx/git-js?sponsor=1"
 			}
 		},
+		"node_modules/tree-kill": {
+			"version": "1.2.2",
+			"resolved": "https://registry.npmjs.org/tree-kill/-/tree-kill-1.2.2.tgz",
+			"integrity": "sha512-L0Orpi8qGpRG//Nd+H90vFB+3iHnue1zSSGmNOOCh1GLJ7rUKVwV2HvijphGQS2UmhUZewS9VgvxYIdgr+fG1A==",
+			"bin": {
+				"tree-kill": "cli.js"
+			}
+		},
 		"node_modules/typescript": {
 			"version": "5.3.3",
 			"resolved": "https://registry.npmjs.org/typescript/-/typescript-5.3.3.tgz",

sandbox/package.json

@@ -21,6 +21,7 @@
 		"dotenv": "^16.3.1",
 		"fs-extra": "^11.2.0",
 		"simple-git": "^3.22.0",
+		"tree-kill": "^1.2.2",
 		"url-join": "^5.0.0",
 		"zod": "^3.22.4"
 	}

sandbox/src/index.ts

@@ -6,6 +6,7 @@ import os, { EOL } from 'os';
 import { join } from 'path';
 import { simpleGit, SimpleGit } from 'simple-git';
 import { runJava } from './run/java.js';
+import { runCSharp } from './run/csharp.js';
 
 export const timeoutSeconds = 30;
 
@@ -39,6 +40,7 @@ const submissionGetData = z
 				contestName: z.string(),
 				teamId: z.number(),
 				teamName: z.string(),
+				teamLanguage: z.enum(['Java', 'CSharp']),
 				problem: z.object({
 					id: z.number(),
 					pascalName: z.string(),
@@ -81,7 +83,7 @@ async function cloneAndRun(submissionData: SubmissionGetData) {
 		return;
 	}
 	const tmpDir = os.tmpdir();
-	const buildDir = join(tmpDir, 'bwcontest_java');
+	const buildDir = join(tmpDir, 'bwcontest-build');
 	if (fs.existsSync(buildDir)) {
 		fs.removeSync(buildDir);
 	}
@@ -100,16 +102,32 @@ async function cloneAndRun(submissionData: SubmissionGetData) {
 	await git.clone(teamRepoUrl, '.');
 	await git.checkout(submissionData.submission.commitHash);
 	const problemName = submissionData.submission.problem.pascalName;
-	let runResult: RunResult;
+	let runResult: RunResult | undefined;
 
 	try {
-		runResult = await runJava(
+		if (submissionData.submission.teamLanguage === 'Java') {
-			javaBinPath,
+			let res = await runJava({
-			buildDir,
+				srcDir: buildDir,
-			join(repoDir, problemName, problemName + '.java'),
+				mainFile: join(repoDir, problemName, problemName + '.java'),
-			problemName,
+				mainClass: problemName,
-			submissionData.submission.problem.realInput
+				input: submissionData.submission.problem.realInput
-		);
+			});
+			if (res.success === true) {
+				runResult = await res.runResult;
+			} else {
+				runResult = res.runResult;
+			}
+		} else if (submissionData.submission.teamLanguage === 'CSharp') {
+			let res = await runCSharp({
+				srcDir: join(repoDir, problemName),
+				input: submissionData.submission.problem.realInput
+			});
+			if (res.success === true) {
+				runResult = await res.runResult;
+			} else {
+				runResult = res.runResult;
+			}
+		}
 	} catch (error) {
 		runResult = {
 			kind: 'SandboxError',
@@ -117,6 +135,7 @@ async function cloneAndRun(submissionData: SubmissionGetData) {
 		};
 	}
 
+	if (runResult !== undefined) {
 		printRunResult(runResult);
 
 		const postBodyObject: SubmissionPostData = {
@@ -140,6 +159,9 @@ async function cloneAndRun(submissionData: SubmissionGetData) {
 		}
 
 		console.log(`- POST: Succeeded`);
+	} else {
+		console.warn(`runResult is undefined`);
+	}
 }
 
 function printRunResult(runResult: RunResult) {
@@ -163,11 +185,7 @@ function printRunResult(runResult: RunResult) {
 }
 
 function validateEnv(): boolean {
-	return (
+	return process.env.ADMIN_URL !== undefined && process.env.REPO_URL !== undefined;
-		process.env.ADMIN_URL !== undefined &&
-		process.env.REPO_URL !== undefined &&
-		process.env.JAVA_PATH !== undefined
-	);
 }
 
 dotenv.config();

sandbox/src/run/csharp.ts

@@ -0,0 +1,89 @@
+import * as fs from 'fs-extra';
+import { join } from 'path';
+import os = require('os');
+import { spawn } from 'child_process';
+import kill from 'tree-kill';
+import { RunResult, timeoutSeconds } from '../index.js';
+import { IRunner, IRunnerReturn } from './types.js';
+
+export const runCSharp: IRunner = async function (params: {
+	srcDir: string;
+	input: string;
+	outputCallback?: (data: string) => void;
+}): IRunnerReturn {
+	console.log(`- RUN: ${params.srcDir}`);
+	const child = spawn('dotnet run', { shell: true, cwd: params.srcDir });
+
+	let outputBuffer = '';
+	child.stdout.setEncoding('utf8');
+	child.stdout.on('data', (data) => {
+		outputBuffer += data.toString();
+		params.outputCallback?.(data.toString());
+	});
+	child.stderr.setEncoding('utf8');
+	child.stderr.on('data', (data) => {
+		outputBuffer += data.toString();
+		params.outputCallback?.(data.toString());
+	});
+
+	let runStartTime = performance.now();
+	child.stdin.write(params.input);
+	child.stdin.end();
+
+	let timeLimitExceeded = false;
+	let completedNormally = false;
+
+	return {
+		success: true,
+		runResult: new Promise<RunResult>((resolve) => {
+			child.on('close', () => {
+				completedNormally = !timeLimitExceeded;
+
+				let runEndTime = performance.now();
+				const runtimeMilliseconds = Math.floor(runEndTime - runStartTime);
+
+				if (completedNormally) {
+					clearTimeout(timeoutHandle);
+					resolve({
+						kind: 'Completed',
+						output: outputBuffer,
+						exitCode: child.exitCode!,
+						runtimeMilliseconds
+					});
+				} else {
+					console.log(`Process terminated, total sandbox time: ${runtimeMilliseconds}ms`);
+					resolve({
+						kind: 'TimeLimitExceeded',
+						output: outputBuffer,
+						resultKindReason: `Timeout after ${timeoutSeconds} seconds`
+					});
+				}
+			});
+
+			let timeoutHandle = setTimeout(() => {
+				if (completedNormally) {
+					return;
+				}
+
+				console.log(`Run timed out after ${timeoutSeconds} seconds, killing process...`);
+				timeLimitExceeded = true;
+
+				child.stdin.end();
+				child.stdin.destroy();
+				child.stdout.destroy();
+				child.stderr.destroy();
+				if (child.pid !== undefined) {
+					kill(child.pid);
+				}
+			}, timeoutSeconds * 1000);
+		}),
+		killFunc() {
+			if (child.pid !== undefined) {
+				if (!completedNormally && !timeLimitExceeded) {
+					kill(child.pid);
+					params.outputCallback?.('\n[Manually stopped]');
+				}
+			}
+		}
+	};
+};

sandbox/src/run/java.ts

@@ -1,34 +1,40 @@
 import { join } from 'path';
 import { exec, spawn } from 'child_process';
 import util from 'util';
-import { RunResult, RunResultKind, timeoutSeconds } from '../index.js';
+import { RunResult, timeoutSeconds } from '../index.js';
+import { IRunner, IRunnerParams, IRunnerReturn } from './types.js';
+import kill from 'tree-kill';
 
 const execPromise = util.promisify(exec);
 
-export async function runJava(
+interface IRunnerParamsJava extends IRunnerParams {
-	javaBinPath: string,
+	srcDir: string;
-	buildDir: string,
+	mainFile: string;
-	mainFile: string,
+	mainClass: string;
-	mainClass: string,
+	input: string;
-	input: string
+	outputCallback?: (data: string) => void;
-): Promise<RunResult> {
+}
-	console.log(`- BUILD: ${mainFile}`);
+
-	const compileCommand = `${join(javaBinPath, 'javac')} -cp ${join(
+export const runJava: IRunner<IRunnerParamsJava> = async function (
-		buildDir,
+	params: IRunnerParamsJava
-		'src'
+): IRunnerReturn {
-	)} ${mainFile} -d ${join(buildDir, 'build')}`;
+	console.log(`- BUILD: ${params.mainFile}`);
+	const compileCommand = `javac -cp ${join(params.srcDir, 'src')} ${params.mainFile} -d ${join(params.srcDir, 'build')}`;
 
 	try {
 		await execPromise(compileCommand);
 	} catch (e) {
 		const buildErrorText = e?.toString() ?? 'Unknown build errors.';
 		console.log('Build errors: ' + buildErrorText);
-		return { kind: 'CompileFailed', resultKindReason: buildErrorText };
+		return {
+			success: false,
+			runResult: { kind: 'CompileFailed', resultKindReason: buildErrorText }
+		};
 	}
 
-	console.log(`- RUN: ${mainClass}`);
+	console.log(`- RUN: ${params.mainClass}`);
-	const runCommand = `${join(javaBinPath, 'java')} -cp "${join(buildDir, 'build')}" ${mainClass}`;
+	const runCommand = `java -cp "${join(params.srcDir, 'build')}" ${params.mainClass}`;
-	return new Promise((resolve) => {
+
 	let outputBuffer = '';
 	const child = spawn(runCommand, { shell: true });
 	child.stdout.setEncoding('utf8');
@@ -41,12 +47,15 @@ export async function runJava(
 	});
 
 	let runStartTime = performance.now();
-		child.stdin.write(input);
+	child.stdin.write(params.input);
 	child.stdin.end();
 
 	let timeLimitExceeded = false;
 	let completedNormally = false;
 
+	return {
+		success: true,
+		runResult: new Promise<RunResult>(async (resolve) => {
 			child.on('close', () => {
 				completedNormally = !timeLimitExceeded;
 
@@ -85,5 +94,14 @@ export async function runJava(
 				child.stderr.destroy();
 				child.kill('SIGKILL');
 			}, timeoutSeconds * 1000);
-	});
+		}),
-}
+		killFunc() {
+			if (child.pid !== undefined) {
+				if (!completedNormally && !timeLimitExceeded) {
+					kill(child.pid);
+					params.outputCallback?.('\n[Manually stopped]');
+				}
+			}
+		}
+	};
+};

sandbox/src/run/types.d.ts

@@ -0,0 +1,16 @@
+import { RunResult } from '../index.ts';
+
+interface IRunnerParams {
+	srcDir: string;
+	input: string;
+	outputCallback?: (data: string) => void;
+}
+
+type IRunnerReturn = Promise<
+	| { success: true; killFunc: () => void; runResult: Promise<RunResult> }
+	| { success: false; runResult: RunResult }
+>;
+
+interface IRunner<T extends IRunnerParams = IRunnerParams> {
+	(params: T): IRunnerReturn;
+}

web/src/routes/admin/diff/[submissionId]/+page.svelte

@@ -7,6 +7,7 @@
 	import { goto } from '$app/navigation';
 	import { stretchTextarea } from '$lib/util';
 	import FormAlert from '$lib/FormAlert.svelte';
+	import { theme } from '../../../stores';
 
 	export let data: PageData;
 	export let form: Actions;
@@ -72,7 +73,7 @@
 <textarea use:stretchTextarea class="code mb-3 form-control" disabled>{data.output}</textarea>
 
 <h3>Diff</h3>
-<div class="mt-3" id="diff" />
+<div class="mt-3" id="diff" class:d2h-dark-color-scheme={$theme === 'dark'} class:d2h-light-color-scheme={$theme === 'light'}/>
 
 <form method="POST" action="?/submit" use:enhance>
 	<h5>Message</h5>

web/src/routes/admin/submissions/[submissionId]/+page.svelte

@@ -6,6 +6,7 @@
 	import { enhance } from '$app/forms';
 	import { stretchTextarea } from '$lib/util';
 	import ConfirmModal from '$lib/ConfirmModal.svelte';
+	import { theme } from '../../../stores';
 
 	export let data: PageData;
 	export let form: Actions;
@@ -141,56 +142,10 @@
 	<h3 style="text-align:center">Output</h3>
 	<textarea use:stretchTextarea class="code mb-3 form-control" disabled>{data.output}</textarea>
 	<h3 style="text-align:center">Diff</h3>
-	<div id="diff" class="dark-diff" />
+	<div
+		id="diff"
+		class="dark-diff"
+		class:d2h-dark-color-scheme={$theme === 'dark'}
+		class:d2h-light-color-scheme={$theme === 'light'}
+	/>
 {/if}
-
-<style lang="scss">
-	:global(.dark-diff) {
-		:global(.d2h-code-side-linenumber),
-		:global(.d2h-info),
-		:global(.d2h-emptyplaceholder),
-		:global(.d2h-code-side-emptyplaceholder),
-		:global(.d2h-file-header),
-		:global(.d2h-tag) {
-			background-color: var(--bs-body-bg);
-			color: var(--bs-body-color);
-		}
-		:global(span) {
-			color: var(--bs-body-color);
-		}
-
-		:global(.d2h-file-wrapper) {
-			border-color: var(--bs-border-color);
-		}
-
-		:global(.d2h-file-header) {
-			border-bottom-color: var(--bs-border-color);
-		}
-
-		:global(.d2h-info) {
-			border-color: var(--bs-border-color);
-		}
-
-		:global(.d2h-del) {
-			background-color: var(--bs-danger-border-subtle);
-			border-color: var(--bs-danger);
-		}
-
-		:global(del) {
-			background-color: rgba(210, 85, 97, 0.5);
-		}
-		:global(.d2h-ins) {
-			background-color: var(--bs-success-border-subtle);
-			border-color: var(--bs-success);
-		}
-
-		:global(.d2h-code-side-emptyplaceholder),
-		:global(.d2h-emptyplaceholder) {
-			border-color: var(--bs-border-color);
-		}
-
-		:global(ins) {
-			background-color: rgba(13, 125, 75, 0.5);
-		}
-	}
-</style>

web/src/routes/api/submission/+server.ts

@@ -21,6 +21,7 @@ export const GET = (async () => {
 				contestName: submissions[0].contest.name,
 				teamId: submissions[0].team.id,
 				teamName: submissions[0].team.name,
+				teamLanguage: submissions[0].team.language,
 				problem: {
 					id: submissions[0].problemId,
 					pascalName: submissions[0].problem.pascalName,