StyleForces

.eslintrc.json

@@ -0,0 +1,21 @@
+{
+  "root": true,
+  "parser": "@typescript-eslint/parser",
+  "parserOptions": {
+    "warnOnUnsupportedTypeScriptVersion": false,
+    "sourceType": "module"
+  },
+  "env": {
+    "browser": false,
+    "node": true,
+    "es6": true
+  },
+  "extends": ["eslint:recommended", "plugin:@typescript-eslint/recommended", "prettier"],
+  "plugins": ["@typescript-eslint", "import", "simple-import-sort"],
+  "ignorePatterns": ["**/node_modules/**", "/dist/**", "/tests/**"],
+  "rules": {
+    "curly": ["error", "all"],
+    "simple-import-sort/imports": "error",
+    "simple-import-sort/exports": "error"
+  }
+}

.gitignore

@@ -1,9 +1,70 @@
-/cf-log-parser-linux
-/cf-log-parser-macos
-/cf-log-parser-win.exe
-/dist
-/log.txt
-/name.txt
-/node_modules
-/output.json
-/package-lock.json
+# Logs
+logs
+*.log
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+lerna-debug.log*
+.pnpm-debug.log*
+
+# Diagnostic reports (https://nodejs.org/api/report.html)
+report.[0-9]*.[0-9]*.[0-9]*.[0-9]*.json
+
+# Runtime data
+pids
+*.pid
+*.seed
+*.pid.lock
+
+# Binaries
+bin/
+
+# Compiled binary addons (https://nodejs.org/api/addons.html)
+build/Release
+
+# Dependency directories
+node_modules/
+jspm_packages/
+
+# TypeScript cache
+*.tsbuildinfo
+dist/
+
+# Python Virtual Environment
+.venv
+
+# Optional npm cache directory
+.npm
+
+# Optional eslint cache
+.eslintcache
+
+# Optional REPL history
+.node_repl_history
+
+# Output of 'npm pack'
+*.tgz
+
+# Yarn Integrity file
+.yarn-integrity
+
+# dotenv environment variable files
+.env
+.env.development.local
+.env.test.local
+.env.production.local
+.env.local
+
+# VSCode
+.vscode-test
+.vscode
+
+# yarn v2
+.yarn/cache
+.yarn/unplugged
+.yarn/build-state.yml
+.yarn/install-state.gz
+.pnp.*
+
+# Artifacts
+data

.prettierignore

@@ -0,0 +1,5 @@
+# Node.js Tools
+node_modules
+
+# Typescript compiller artifacts
+dist/

.prettierrc.json

@@ -0,0 +1,23 @@
+{
+  "semi": true,
+  "trailingComma": "none",
+  "singleQuote": false,
+  "printWidth": 100,
+  "arrowParens": "always",
+  "bracketSpacing": true,
+  "endOfLine": "crlf",
+  "overrides": [
+    {
+      "files": ["**/*.json, **/*.yml"],
+      "options": {
+        "tabWidth": 2
+      }
+    },
+    {
+      "files": ["**/*.ts"],
+      "options": {
+        "tabWidth": 4
+      }
+    }
+  ]
+}

package.json

@@ -1,17 +1,52 @@
-{
-    "name": "cf-log-parser",
-    "version": "1.0.0",
-    "description": "",
-    "main": "./dist/index.js",
-    "bin": "./dist/index.js",
-    "scripts": {
-        "test": "echo \"Error: no test specified\" && exit 1"
-    },
-    "author": "",
-    "license": "ISC",
-    "dependencies": {
-        "@types/node": "^18.0.6",
-        "pkg": "^5.8.0",
-        "typescript": "^4.7.4"
-    }
-}
+{
+  "name": "styleforces",
+  "version": "1.0.0",
+  "description": "Various tooling for codeforces interaction.",
+  "type": "module",
+  "main": "./dist/index.js",
+  "scripts": {
+    "start": "node ./dist/index.js",
+    "build": "npm exec tsc --build",
+    "clean": "npm exec tsc --build --clean",
+    "bootstrap": "npm run build && npm run start",
+    "lint": "npm exec eslint . && npm exec prettier --check .",
+    "format": "npm exec eslint --fix . && npm exec prettier --write . > /dev/null"
+  },
+  "license": "MIT",
+  "keywords": [
+    "codeforces",
+    "toolkit"
+  ],
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/unknowableshade/StyleForces.git"
+  },
+  "author": {
+    "name": "unknowableshade",
+    "email": "60275123+unknowableshade@users.noreply.github.com",
+    "url": "https://ermnvldmr.com"
+  },
+  "bugs": {
+    "url": "https://github.com/unknowableshade/StyleForces/issues"
+  },
+  "readme": "https://github.com/unknowableshade/StyleForces#readme",
+  "engines": {
+    "node": "18.x.x",
+    "npm": "*"
+  },
+  "devDependencies": {
+    "@types/cheerio": "^0.22.31",
+    "@types/node": "^20.3.3",
+    "@typescript-eslint/eslint-plugin": "^5.61.0",
+    "@typescript-eslint/parser": "^5.61.0",
+    "eslint": "^8.44.0",
+    "eslint-config-prettier": "^8.8.0",
+    "eslint-plugin-import": "^2.27.5",
+    "eslint-plugin-simple-import-sort": "^10.0.0",
+    "prettier": "^3.0.0",
+    "typescript": "^5.1.6"
+  },
+  "dependencies": {
+    "cheerio": "^1.0.0-rc.12"
+  }
+}

src/command/copyDetect.ts

@@ -0,0 +1,104 @@
+import * as cheerio from "cheerio";
+import { execFile as execFileCallback } from "child_process";
+import { readFile, writeFile } from "fs/promises";
+import path from "path";
+import { parseArgs, promisify } from "util";
+
+import { ExtendedSubmission, isErrnoException, isExecFileError } from "../lib/types.js";
+
+const execFile = promisify(execFileCallback);
+
+export const HELP = `
+Usage: ... copyDetect [options...]
+Options:
+    -d <STRING>  : Path to the directory with submissions.
+    -l <STRING>  : Language tokenize during copydetection.
+    -o <STRING>  : Path to the resulted report. (default: './result.html')
+
+Example: ... copyDetect -d ./data -l cpp -o ./result.html
+`;
+
+function error(msg: string) {
+    console.log(msg);
+    console.log("Use -h: to get usage help.");
+}
+
+export async function execute() {
+    const {
+        values: { dataDir, lang, outFile }
+    } = parseArgs({
+        options: {
+            dataDir: {
+                type: "string",
+                short: "d",
+                default: "./result"
+            },
+            lang: {
+                type: "string",
+                short: "l",
+                default: "cpp"
+            },
+            outFile: {
+                type: "string",
+                short: "o",
+                default: "./result.html"
+            }
+        },
+        args: process.argv.slice(3)
+    });
+
+    if (!dataDir || !lang || !outFile) {
+        error("Arguments don't seem to be correct.");
+        return;
+    }
+
+    try {
+        await execFile("copydetect", ["-t", dataDir, "-e", "src", "-o", lang, "-O", outFile, "-a"]);
+    } catch (err) {
+        if (isErrnoException(err)) {
+            error("copydetect cannot be spawned. Check your environment.");
+            return;
+        }
+        if (isExecFileError(err)) {
+            error(`copydetect binary said: ${err.stderr}`);
+            return;
+        }
+    }
+
+    const $ = cheerio.load(await readFile(outFile));
+
+    $(`<h6 style="text-align: center;">Generated on: ${new Date().toString()}</h6>`).insertAfter(
+        "div.container h1"
+    );
+
+    for (const p of $("tbody.table-light tr td p")) {
+        const first = $(p).children("i")[0];
+        const second = $(p).children("i")[1];
+
+        const firstPath = path.parse($(first).text());
+        const secondPath = path.parse($(second).text());
+
+        const firstData = JSON.parse(
+            (await readFile(path.join(firstPath.dir, `${firstPath.name}.json`))).toString()
+        ) as ExtendedSubmission;
+        const secondData = JSON.parse(
+            (await readFile(path.join(secondPath.dir, `${secondPath.name}.json`))).toString()
+        ) as ExtendedSubmission;
+
+        $(p).prepend(
+            `<b>${firstData.author.members[0].handle} - ${secondData.author.members[0].handle}</b><br>`
+        );
+
+        $(first).replaceWith(`<a href="${firstData.url}">${firstData.id}</a>`);
+        $(second).replaceWith(`<a href="${secondData.url}">${secondData.id}</a>`);
+    }
+
+    try {
+        await writeFile(outFile, $.html());
+        console.log("✓ Successfully generated report file.");
+        console.log(`➜ ${outFile}`);
+    } catch {
+        console.log("Cannot make report file.");
+    }
+}
+

src/command/fetchOk.ts

@@ -0,0 +1,136 @@
+import { mkdir, readFile, writeFile } from "fs/promises";
+import path from "path";
+import { parseArgs } from "util";
+
+import * as codeforces from "../lib/codeforces.js";
+import Submission from "../lib/submission.js";
+import { BaseProblem, isErrnoException } from "../lib/types.js";
+
+type SubmissionIndex = {
+    [handle: string]: BaseProblem[];
+};
+
+export const HELP = `
+Usage: ... fetchOk [options...]
+Options:
+    -i (STRING)  : Contest ID.
+    -g <STRING>  : Group ID (if in group).
+    -c <INTEGER> : Positive amount of "OK" submissions to fetch. (default: 100)
+    -l <INTEGER> : Positive amouut of submissions to lookup. (default: 200)
+    -a <INTEGER> : Positive amount of submissions to skip. (default: 1)
+    -o <STRING>  : Path to the directory to write submissions to. (default: './result')
+
+Example: ... fetchOk -i someId -g anotherId -c 50 -l 100 -a 10 -o './result'
+`;
+
+function error(msg: string) {
+    console.log(msg);
+    console.log("Use -h: to get usage help.");
+}
+
+export async function execute() {
+    const {
+        values: { contestId, groupId, countArg, lookupArg, afterArg, outDir }
+    } = parseArgs({
+        options: {
+            contestId: {
+                type: "string",
+                short: "i"
+            },
+            groupId: {
+                type: "string",
+                short: "g"
+            },
+            countArg: {
+                type: "string",
+                short: "c"
+            },
+            lookupArg: {
+                type: "string",
+                short: "l"
+            },
+            afterArg: {
+                type: "string",
+                short: "a"
+            },
+            outDir: {
+                type: "string",
+                short: "o",
+                default: "./output"
+            }
+        },
+        args: process.argv.slice(3)
+    });
+
+    const count = countArg && /^(0|[1-9]\d*)$/.test(countArg) ? parseInt(countArg) : 100;
+    const lookup = lookupArg && /^(0|[1-9]\d*)$/.test(lookupArg) ? parseInt(lookupArg) : 200;
+    const after = afterArg && /^(0|[1-9]\d*)$/.test(afterArg) ? parseInt(afterArg) : 1;
+
+    if (!contestId || !outDir) {
+        error("Arguments don't seem to be correct.");
+        return;
+    }
+
+    try {
+        await mkdir(outDir, { recursive: true });
+    } catch {
+        error("Out directory cannot be made.");
+        return;
+    }
+
+    const indexPath = path.join(outDir, "index.json");
+
+    let index: SubmissionIndex;
+    try {
+        index = JSON.parse((await readFile(indexPath)).toString()) as SubmissionIndex;
+    } catch {
+        index = {};
+    }
+
+    const status = (await codeforces.methods.contestStatus(contestId, after, lookup))
+        .filter((submission) => submission.verdict === "OK")
+        .slice(0, count);
+
+    for (const submission of status) {
+        if (!Object.hasOwn(index, submission.author.members[0].handle)) {
+            index[submission.author.members[0].handle] = [];
+        }
+
+        if (
+            index[submission.author.members[0].handle].find(
+                (problem) =>
+                    problem.contestId === submission.contestId &&
+                    problem.name === submission.problem.name
+            )
+        ) {
+            continue;
+        }
+
+        try {
+            await Submission.fetch(submission, groupId).then((res) => res.save(outDir));
+        } catch (err) {
+            if (isErrnoException(error)) {
+                error(`Cannot write submission "${submission.id}".`);
+                return;
+            }
+            if (err instanceof Error) {
+                error(err.message);
+                return;
+            }
+        }
+
+        index[submission.author.members[0].handle].push(submission.problem);
+    }
+
+    console.log("✓ Successfully fetched submissions.");
+    console.log(`➜ ${outDir}`);
+
+    try {
+        await writeFile(indexPath, JSON.stringify(index));
+        console.log("✓ Index captured.");
+    } catch {
+        error("Index haven't been saved! Next run will overwrite submissions.");
+        return;
+    }
+}
+

src/command/logSerializer.ts

@@ -0,0 +1,139 @@
+import { readFile, writeFile } from "fs/promises";
+import { parseArgs } from "util";
+
+interface Run {
+    contestant: string;
+    problemLetter: string;
+    timeMinutesFromStart: number;
+    success: boolean;
+}
+
+interface Output {
+    contestName: string;
+    freezeTimeMinutesFromStart: number;
+    problemLetters: string[];
+    contestants: string[];
+    runs: Run[];
+}
+
+export const HELP = `
+Usage: ... logSerializer [options...]
+Options:
+    -f (INTEGER) : Freeze time counting from start in minutes.
+    -l (STRING)  : Path to the contest log file.
+    -d (STRING)  : Path to the domain's users file.
+    -o <STRING>  : Path to the resulted serialization. (default: './result.json')
+
+Example: ... logSerializer -f 120 -l ./log.txt -d ./domain.txt -o ./result.json
+`;
+
+function error(msg: string) {
+    console.log(msg);
+    console.log("Use -h: to get usage help.");
+}
+
+export async function execute() {
+    const {
+        values: { freezeTime, logFile, domainFile, outFile }
+    } = parseArgs({
+        options: {
+            freezeTime: {
+                type: "string",
+                short: "f"
+            },
+            logFile: {
+                type: "string",
+                short: "l"
+            },
+            domainFile: {
+                type: "string",
+                short: "d"
+            },
+            outFile: {
+                type: "string",
+                short: "o",
+                default: "./result.json"
+            }
+        },
+        args: process.argv.slice(3)
+    });
+
+    if (!freezeTime || !logFile || !domainFile || !outFile) {
+        error("Arguments don't seem to be correct.");
+        return;
+    }
+
+    if (!/^(0|[1-9]\d*)$/.test(freezeTime)) {
+        error("Freezetime doesn't seem to be correct.");
+        return;
+    }
+
+    let log: string[];
+    let domain: string[];
+
+    try {
+        log = (await readFile(logFile, "utf-8")).trim().split("\n");
+        domain = (await readFile(domainFile, "utf-8")).trim().split("\n");
+    } catch {
+        error("Log/domain file is unreachable.");
+        return;
+    }
+
+    const names: Record<string, string> = {};
+
+    for (const user of domain) {
+        const values = user.split(" | ").map((value) => value.trim());
+        names[values[1]] = values[3];
+    }
+
+    const output: Output = {
+        contestName: "",
+        freezeTimeMinutesFromStart: parseInt(freezeTime) || 0,
+        problemLetters: [],
+        contestants: [],
+        runs: []
+    };
+
+    for (const entry of log) {
+        const cmd = entry.slice(0, entry.indexOf(" ")).trim();
+        const csv = entry.slice(entry.indexOf(" ") + 1).trim();
+
+        switch (cmd) {
+            case "@contest": {
+                output.contestName = csv.replace(/"/g, "");
+                break;
+            }
+            case "@p": {
+                const values = csv.split(",");
+                output.problemLetters.push(values[0]);
+                break;
+            }
+            case "@t": {
+                const values = csv.split(",");
+                output.contestants.push(names[values[3].split("=")[1]]);
+                break;
+            }
+            case "@s": {
+                const values = csv.split(",");
+                const run: Run = {
+                    contestant: output.contestants[parseInt(values[0]) - 1],
+                    problemLetter: values[1],
+                    timeMinutesFromStart: Math.floor(parseInt(values[3]) / 60),
+                    success: values[4] === "OK"
+                };
+
+                output.runs.push(run);
+                break;
+            }
+        }
+    }
+
+    try {
+        await writeFile(outFile, JSON.stringify(output));
+        console.log("✓ Successfully serialized contest log file.");
+        console.log(`➜ ${outFile}`);
+    } catch {
+        console.log("Cannot write result of serialization.");
+    }
+}
+

src/config.ts

@@ -0,0 +1,32 @@
+import path from "path";
+import { fileURLToPath } from "url";
+
+const ROOT = path.dirname(fileURLToPath(import.meta.url));
+
+const config = {
+    cfUrl: "https://codeforces.com",
+    cfEndpoint: "https://codeforces.com/api",
+    cfKey: process.env.CF_KEY,
+    cfSecret: process.env.CF_SECRET,
+    distDir: path.join(ROOT, "../data/"),
+    headers: {
+        Host: "codeforces.com",
+        Pragma: "no-cache",
+        "Cache-Control": "no-cache",
+        "Sec-Ch-Ua-Mobile": "?0",
+        "Sec-Ch-Ua-Platform": '""',
+        "Upgrade-Insecure-Requests": "1",
+        "User-Agent":
+            "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/114.0.5735.199 Safari/537.36",
+        Accept: "text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.7",
+        "Sec-Fetch-Site": "none",
+        "Sec-Fetch-Mode": "navigate",
+        "Sec-Fetch-User": "?1",
+        "Sec-Fetch-Dest": "document",
+        "Accept-Encoding": "gzip, deflate",
+        "Accept-Language": "en-US,en;q=0.9",
+        Cookie: process.env.CF_COOKIE ?? ""
+    }
+};
+
+export default config;

src/index.ts

@@ -1,90 +1,44 @@
-import { existsSync, readFileSync, writeFileSync } from "fs";
-
-interface Run {
-    contestant: string;
-    problemLetter: string;
-    timeMinutesFromStart: number;
-    success: boolean;
-}
-
-interface Output {
-    contestName: string;
-    freezeTimeMinutesFromStart: number;
-    problemLetters: string[];
-    contestants: string[];
-    runs: Run[];
-}
-
-const pathToLog = process.argv[3];
-const pathToUser = process.argv[4];
-const freezeTime = process.argv[2];
-
-console.log(pathToLog, pathToUser);
-
-if (!existsSync(pathToLog) || !existsSync(pathToUser)) {
-    console.log("Cannot find path specified.")
-}
-
-const logs = readFileSync(pathToLog, "utf-8").trim().split("\n");
-const users = readFileSync(pathToUser, "utf-8").trim().split("\n");
-
-const names: Record<string, string> = {};
-
-for (const user of users) {
-    const values = user.split(" | ").map(value => value.trim());
-    names[values[1]] = values[3];
-}
-
-const output: Output = {
-    contestName: "",
-    freezeTimeMinutesFromStart: parseInt(freezeTime) || 0,
-    problemLetters: [],
-    contestants: [],
-    runs: []
-};
-
-for (const log of logs) {
-    const cmd = log.slice(0, log.indexOf(" ")).trim();
-    const csv = log.slice(log.indexOf(" ") + 1).trim();
-
-    switch (cmd) {
-        case "@contest": {
-            output.contestName = csv.replace(/"/g, "");
-            break;
-        }
-        case "@p": {
-            const values = csv.split(",");
-            output.problemLetters.push(values[0]);
-            break;
-        }
-        case "@t": {
-            const values = csv.split(",");
-            output.contestants.push(names[values[3].split("=")[1]]);
-            break;
-        }
-        case "@s": {
-            const values = csv.split(",");
-            const run: Run = {
-                contestant: output.contestants[parseInt(values[0]) - 1],
-                problemLetter: values[1],
-                timeMinutesFromStart: Math.floor(parseInt(values[3]) / 60),
-                success: values[4] === "OK" 
-            }
-
-            output.runs.push(run);
-            break;
-        }
-    }
-} 
-
-try {
-    writeFileSync("output.json", JSON.stringify(output));
-    console.log("✓ Successfully converted contest log file.");
-    console.log("➜ output.json");
-}
-catch {
-    console.log("Cannot write to file: output.json");
-}
-
-
-
+import * as copyDetect from "./command/copyDetect.js";
+import * as fetchOk from "./command/fetchOk.js";
+import * as logSerializer from "./command/logSerializer.js";
+
+const HELP = `
+Usage: ... (command) [arguments...]
+Commands:
+    - logSerializer : Convert contest log to JSON with freeze-time.
+    - fetchOk       : Fetch every "OK" submission from contest.
+    - copyDetect    : Compare submissions and generate copy report of them. (requires copydetect) 
+Environment:
+    CF_KEY    : Codeforces API Key.
+    CF_SECRET : Codeforces API Secret.
+    CF_COOKIE : Cookies extracted from your session.
+`;
+
+const help = !!process.argv.find((arg) => arg === "-h");
+
+switch (process.argv[2]) {
+    case "logSerializer":
+        if (help) {
+            console.log(logSerializer.HELP);
+            break;
+        }
+        logSerializer.execute();
+        break;
+    case "fetchOk":
+        if (help) {
+            console.log(fetchOk.HELP);
+            break;
+        }
+        fetchOk.execute();
+        break;
+    case "copyDetect":
+        if (help) {
+            console.log(copyDetect.HELP);
+            break;
+        }
+        copyDetect.execute();
+        break;
+    default:
+        console.log(HELP);
+        break;
+}

src/lib/codeforces.ts

@@ -0,0 +1,56 @@
+import { createHash, randomBytes } from "crypto";
+
+import config from "../config.js";
+import { BaseSubmission } from "./types.js";
+
+function hashedQuery(method: string, queries: [string, string][]): string {
+    const query =
+        "?" +
+        [
+            ["apiKey", config.cfKey],
+            ["time", (Date.now() / 1000).toFixed(0)]
+        ]
+            .concat(queries)
+            .sort()
+            .map((pair) => pair.join("="))
+            .join("&");
+
+    const rand = randomBytes(3).toString("hex");
+
+    const sig =
+        rand +
+        createHash("sha512").update(`${rand}${method}${query}#${config.cfSecret}`).digest("hex");
+
+    return `${query}&apiSig=${sig}`;
+}
+
+export class CfApiError implements Error {
+    name = "CfApiError";
+    message: string;
+
+    constructor(message: string) {
+        this.message = message;
+    }
+}
+
+export const methods = {
+    contestStatus: async (contestId: string, from = 1, count = 10): Promise<BaseSubmission[]> => {
+        const method = "/contest.status";
+
+        const query = hashedQuery(method, [
+            ["contestId", contestId],
+            ["from", from.toString()],
+            ["count", count.toString()]
+        ]);
+
+        const url = config.cfEndpoint + method + query;
+
+        const data = await fetch(url).then((res) => res.json());
+        
+        if (data.status !== "OK") {
+            throw new CfApiError(data.reason);
+        }
+
+        return data.result;
+    }
+};

src/lib/submission.ts

@@ -0,0 +1,65 @@
+import * as cheerio from "cheerio";
+import { mkdir, writeFile } from "fs/promises";
+import path from "path";
+
+import config from "../config.js";
+import { BaseSubmission, ExtendedSubmission } from "./types.js";
+
+function submissionUrl(id: string, contestId?: string, groupId?: string) {
+    const groupPath = groupId ? "/group/" + groupId : "";
+    const contestPath = contestId ? "/contest/" + contestId : "";
+    const submissionPath = "/submission/" + id;
+
+    return config.cfUrl + groupPath + contestPath + submissionPath;
+}
+
+export default class Submission {
+    public readonly data: ExtendedSubmission;
+
+    constructor(submission: ExtendedSubmission) {
+        this.data = submission;
+    }
+
+    public async ignore(): Promise<void> {
+        await fetch(this.data.url, {
+            headers: config.headers,
+            body: new URLSearchParams({
+                csrf_token: this.data.csrf,
+                action: "ignore",
+                submissionId: this.data.id.toString(),
+                submit: "Ignore"
+            }),
+            method: "POST"
+        });
+    }
+
+    public async save(dir: string): Promise<void> {
+        const dist = path.join(dir, this.data.id.toString());
+
+        await mkdir(dist, { recursive: true });
+        await writeFile(path.join(dist, `${this.data.id}.json`), JSON.stringify(this.data));
+        await writeFile(path.join(dist, `${this.data.id}.src`), this.data.source);
+    }
+
+    static async fetch(submission: BaseSubmission, groupId?: string): Promise<Submission> {
+        const url = submissionUrl(
+            submission.id.toString(),
+            submission.contestId?.toString(),
+            groupId
+        );
+
+        const html = await fetch(url, {
+            headers: config.headers
+        }).then((res) => res.text());
+
+        const $ = cheerio.load(html);
+
+        try {
+            const source = $("#program-source-text").text();
+            const csrf = $("form.submission-action-form input[name=csrf_token]").attr().value;
+            return new Submission({ ...submission, source, csrf, url, groupId });
+        } catch {
+            throw new Error("Cannot access source code of the submission.");
+        }
+    }
+}

src/lib/types.ts

@@ -0,0 +1,136 @@
+type ArbitraryObject = { [key: string]: unknown };
+
+function isArbitraryObject(potentialObject: unknown): potentialObject is ArbitraryObject {
+    return !!potentialObject && typeof potentialObject === "object";
+}
+
+export type ParticipantType =
+    | "CONTESTANT"
+    | "PRACTICE"
+    | "VIRTUAL"
+    | "MANAGER"
+    | "OUT_OF_COMPETITION";
+export type ProblemType = "PROGRAMMING" | "QUESTION";
+export type VerdictType =
+    | "FAILED"
+    | "OK"
+    | "PARTIAL"
+    | "COMPILATION_ERROR"
+    | "RUNTIME_ERROR"
+    | "WRONG_ANSWER"
+    | "PRESENTATION_ERROR"
+    | "TIME_LIMIT_EXCEEDED"
+    | "MEMORY_LIMIT_EXCEEDED"
+    | "IDLENESS_LIMIT_EXCEEDED"
+    | "SECURITY_VIOLATED"
+    | "CRASHED"
+    | "INPUT_PREPARATION_CRASHED"
+    | "CHALLENGED"
+    | "SKIPPED"
+    | "TESTING"
+    | "REJECTED";
+export type TestSetType =
+    | "SAMPLES"
+    | "PRETESTS"
+    | "TESTS"
+    | "CHALLENGES"
+    | "TESTS1"
+    | "TESTS2"
+    | "TESTS3"
+    | "TESTS4"
+    | "TESTS5"
+    | "TESTS6"
+    | "TESTS7"
+    | "TESTS8"
+    | "TESTS9"
+    | "TESTS10";
+
+export interface BaseProblem {
+    contestId?: number;
+    problemsetName: string;
+    index: string;
+    name: string;
+    type: ProblemType;
+    tags: string[];
+    points?: number;
+    rating?: number;
+}
+
+export interface BaseMember {
+    handle: string;
+    name?: string;
+}
+
+export interface BaseParty {
+    contestId?: number;
+    members: BaseMember[];
+    participantType: ParticipantType;
+    ghost: boolean;
+    startTimeSeconds?: number;
+    teamId?: number;
+    teamName?: string;
+    room?: number;
+}
+
+export interface BaseSubmission {
+    id: number;
+    contestId?: number;
+    creationTimeSeconds: number;
+    relativeTimeSeconds: number;
+    problem: BaseProblem;
+    author: BaseParty;
+    programmingLanguage: string;
+    verdict?: VerdictType;
+    testset: TestSetType;
+    passedTestCount: number;
+    timeConsumedMillis: number;
+    memoryConsumedBytes: number;
+    points?: number;
+}
+
+export interface ExtendedSubmission extends BaseSubmission {
+    source: string;
+    csrf: string;
+    url: string;
+    groupId?: string;
+}
+
+export interface ErrnoException extends Error {
+    errno?: number;
+    code?: string;
+    path?: string;
+    syscall?: string;
+}
+
+export function isErrnoException(error: unknown): error is ErrnoException {
+    return (
+        isArbitraryObject(error) &&
+        error instanceof Error &&
+        (typeof error.errno === "number" || typeof error.errno === "undefined") &&
+        (typeof error.code === "string" || typeof error.code === "undefined") &&
+        (typeof error.path === "string" || typeof error.path === "undefined") &&
+        (typeof error.syscall === "string" || typeof error.syscall === "undefined")
+    );
+}
+
+export interface ExecFileError extends Error {
+    cmd: string;
+    code: number;
+    killed: boolean;
+    signal: object;
+    stderr: string;
+    stdout: string;
+}
+
+export function isExecFileError(error: unknown): error is ExecFileError {
+    return (
+        isArbitraryObject(error) &&
+        error instanceof Error &&
+        typeof error.cwd === "string" &&
+        typeof error.code === "number" &&
+        typeof error.killed === "boolean" &&
+        typeof error.signal === "object" &&
+        typeof error.stderr === "string" &&
+        typeof error.stdout === "string"
+    );
+}

tsconfig.json

@@ -1,103 +1,103 @@
-{
-    "compilerOptions": {
-        /* Visit https://aka.ms/tsconfig to read more about this file */
-
-        /* Projects */
-        // "incremental": true,                              /* Save .tsbuildinfo files to allow for incremental compilation of projects. */
-        // "composite": true,                                /* Enable constraints that allow a TypeScript project to be used with project references. */
-        // "tsBuildInfoFile": "./.tsbuildinfo",              /* Specify the path to .tsbuildinfo incremental compilation file. */
-        // "disableSourceOfProjectReferenceRedirect": true,  /* Disable preferring source files instead of declaration files when referencing composite projects. */
-        // "disableSolutionSearching": true,                 /* Opt a project out of multi-project reference checking when editing. */
-        // "disableReferencedProjectLoad": true,             /* Reduce the number of projects loaded automatically by TypeScript. */
-
-        /* Language and Environment */
-        "target": "es2016" /* Set the JavaScript language version for emitted JavaScript and include compatible library declarations. */,
-        // "lib": [],                                        /* Specify a set of bundled library declaration files that describe the target runtime environment. */
-        // "jsx": "preserve",                                /* Specify what JSX code is generated. */
-        // "experimentalDecorators": true,                   /* Enable experimental support for TC39 stage 2 draft decorators. */
-        // "emitDecoratorMetadata": true,                    /* Emit design-type metadata for decorated declarations in source files. */
-        // "jsxFactory": "",                                 /* Specify the JSX factory function used when targeting React JSX emit, e.g. 'React.createElement' or 'h'. */
-        // "jsxFragmentFactory": "",                         /* Specify the JSX Fragment reference used for fragments when targeting React JSX emit e.g. 'React.Fragment' or 'Fragment'. */
-        // "jsxImportSource": "",                            /* Specify module specifier used to import the JSX factory functions when using 'jsx: react-jsx*'. */
-        // "reactNamespace": "",                             /* Specify the object invoked for 'createElement'. This only applies when targeting 'react' JSX emit. */
-        // "noLib": true,                                    /* Disable including any library files, including the default lib.d.ts. */
-        // "useDefineForClassFields": true,                  /* Emit ECMAScript-standard-compliant class fields. */
-        // "moduleDetection": "auto",                        /* Control what method is used to detect module-format JS files. */
-
-        /* Modules */
-        "module": "commonjs" /* Specify what module code is generated. */,
-        "rootDir": "./src" /* Specify the root folder within your source files. */,
-        // "moduleResolution": "node",                       /* Specify how TypeScript looks up a file from a given module specifier. */
-        // "baseUrl": "./",                                  /* Specify the base directory to resolve non-relative module names. */
-        // "paths": {},                                      /* Specify a set of entries that re-map imports to additional lookup locations. */
-        // "rootDirs": [],                                   /* Allow multiple folders to be treated as one when resolving modules. */
-        // "typeRoots": [],                                  /* Specify multiple folders that act like './node_modules/@types'. */
-        // "types": [],                                      /* Specify type package names to be included without being referenced in a source file. */
-        // "allowUmdGlobalAccess": true,                     /* Allow accessing UMD globals from modules. */
-        // "moduleSuffixes": [],                             /* List of file name suffixes to search when resolving a module. */
-        // "resolveJsonModule": true,                        /* Enable importing .json files. */
-        // "noResolve": true,                                /* Disallow 'import's, 'require's or '<reference>'s from expanding the number of files TypeScript should add to a project. */
-
-        /* JavaScript Support */
-        // "allowJs": true,                                  /* Allow JavaScript files to be a part of your program. Use the 'checkJS' option to get errors from these files. */
-        // "checkJs": true,                                  /* Enable error reporting in type-checked JavaScript files. */
-        // "maxNodeModuleJsDepth": 1,                        /* Specify the maximum folder depth used for checking JavaScript files from 'node_modules'. Only applicable with 'allowJs'. */
-
-        /* Emit */
-        // "declaration": true,                              /* Generate .d.ts files from TypeScript and JavaScript files in your project. */
-        // "declarationMap": true,                           /* Create sourcemaps for d.ts files. */
-        // "emitDeclarationOnly": true,                      /* Only output d.ts files and not JavaScript files. */
-        // "sourceMap": true,                                /* Create source map files for emitted JavaScript files. */
-        // "outFile": "./",                                  /* Specify a file that bundles all outputs into one JavaScript file. If 'declaration' is true, also designates a file that bundles all .d.ts output. */
-        "outDir": "./dist" /* Specify an output folder for all emitted files. */,
-        // "removeComments": true,                           /* Disable emitting comments. */
-        // "noEmit": true,                                   /* Disable emitting files from a compilation. */
-        // "importHelpers": true,                            /* Allow importing helper functions from tslib once per project, instead of including them per-file. */
-        // "importsNotUsedAsValues": "remove",               /* Specify emit/checking behavior for imports that are only used for types. */
-        // "downlevelIteration": true,                       /* Emit more compliant, but verbose and less performant JavaScript for iteration. */
-        // "sourceRoot": "",                                 /* Specify the root path for debuggers to find the reference source code. */
-        // "mapRoot": "",                                    /* Specify the location where debugger should locate map files instead of generated locations. */
-        // "inlineSourceMap": true,                          /* Include sourcemap files inside the emitted JavaScript. */
-        // "inlineSources": true,                            /* Include source code in the sourcemaps inside the emitted JavaScript. */
-        // "emitBOM": true,                                  /* Emit a UTF-8 Byte Order Mark (BOM) in the beginning of output files. */
-        // "newLine": "crlf",                                /* Set the newline character for emitting files. */
-        // "stripInternal": true,                            /* Disable emitting declarations that have '@internal' in their JSDoc comments. */
-        // "noEmitHelpers": true,                            /* Disable generating custom helper functions like '__extends' in compiled output. */
-        // "noEmitOnError": true,                            /* Disable emitting files if any type checking errors are reported. */
-        // "preserveConstEnums": true,                       /* Disable erasing 'const enum' declarations in generated code. */
-        // "declarationDir": "./",                           /* Specify the output directory for generated declaration files. */
-        // "preserveValueImports": true,                     /* Preserve unused imported values in the JavaScript output that would otherwise be removed. */
-
-        /* Interop Constraints */
-        // "isolatedModules": true,                          /* Ensure that each file can be safely transpiled without relying on other imports. */
-        // "allowSyntheticDefaultImports": true,             /* Allow 'import x from y' when a module doesn't have a default export. */
-        "esModuleInterop": true /* Emit additional JavaScript to ease support for importing CommonJS modules. This enables 'allowSyntheticDefaultImports' for type compatibility. */,
-        // "preserveSymlinks": true,                         /* Disable resolving symlinks to their realpath. This correlates to the same flag in node. */
-        "forceConsistentCasingInFileNames": true /* Ensure that casing is correct in imports. */,
-
-        /* Type Checking */
-        "strict": true /* Enable all strict type-checking options. */,
-        // "noImplicitAny": true,                            /* Enable error reporting for expressions and declarations with an implied 'any' type. */
-        // "strictNullChecks": true,                         /* When type checking, take into account 'null' and 'undefined'. */
-        // "strictFunctionTypes": true,                      /* When assigning functions, check to ensure parameters and the return values are subtype-compatible. */
-        // "strictBindCallApply": true,                      /* Check that the arguments for 'bind', 'call', and 'apply' methods match the original function. */
-        // "strictPropertyInitialization": true,             /* Check for class properties that are declared but not set in the constructor. */
-        // "noImplicitThis": true,                           /* Enable error reporting when 'this' is given the type 'any'. */
-        // "useUnknownInCatchVariables": true,               /* Default catch clause variables as 'unknown' instead of 'any'. */
-        // "alwaysStrict": true,                             /* Ensure 'use strict' is always emitted. */
-        // "noUnusedLocals": true,                           /* Enable error reporting when local variables aren't read. */
-        // "noUnusedParameters": true,                       /* Raise an error when a function parameter isn't read. */
-        // "exactOptionalPropertyTypes": true,               /* Interpret optional property types as written, rather than adding 'undefined'. */
-        // "noImplicitReturns": true,                        /* Enable error reporting for codepaths that do not explicitly return in a function. */
-        // "noFallthroughCasesInSwitch": true,               /* Enable error reporting for fallthrough cases in switch statements. */
-        // "noUncheckedIndexedAccess": true,                 /* Add 'undefined' to a type when accessed using an index. */
-        // "noImplicitOverride": true,                       /* Ensure overriding members in derived classes are marked with an override modifier. */
-        // "noPropertyAccessFromIndexSignature": true,       /* Enforces using indexed accessors for keys declared using an indexed type. */
-        // "allowUnusedLabels": true,                        /* Disable error reporting for unused labels. */
-        // "allowUnreachableCode": true,                     /* Disable error reporting for unreachable code. */
-
-        /* Completeness */
-        // "skipDefaultLibCheck": true,                      /* Skip type checking .d.ts files that are included with TypeScript. */
-        "skipLibCheck": true /* Skip type checking all .d.ts files. */
-    }
-}
+{
+  "compilerOptions": {
+    /* Visit https://aka.ms/tsconfig to read more about this file */
+
+    /* Projects */
+    // "incremental": true,                              /* Save .tsbuildinfo files to allow for incremental compilation of projects. */
+    // "composite": true,                                /* Enable constraints that allow a TypeScript project to be used with project references. */
+    // "tsBuildInfoFile": "./.tsbuildinfo",              /* Specify the path to .tsbuildinfo incremental compilation file. */
+    // "disableSourceOfProjectReferenceRedirect": true,  /* Disable preferring source files instead of declaration files when referencing composite projects. */
+    // "disableSolutionSearching": true,                 /* Opt a project out of multi-project reference checking when editing. */
+    // "disableReferencedProjectLoad": true,             /* Reduce the number of projects loaded automatically by TypeScript. */
+
+    /* Language and Environment */
+    "target": "ESNext" /* Set the JavaScript language version for emitted JavaScript and include compatible library declarations. */,
+    // "lib": [],                                        /* Specify a set of bundled library declaration files that describe the target runtime environment. */
+    // "jsx": "preserve",                                /* Specify what JSX code is generated. */
+    // "experimentalDecorators": true,                   /* Enable experimental support for TC39 stage 2 draft decorators. */
+    // "emitDecoratorMetadata": true,                    /* Emit design-type metadata for decorated declarations in source files. */
+    // "jsxFactory": "",                                 /* Specify the JSX factory function used when targeting React JSX emit, e.g. 'React.createElement' or 'h'. */
+    // "jsxFragmentFactory": "",                         /* Specify the JSX Fragment reference used for fragments when targeting React JSX emit e.g. 'React.Fragment' or 'Fragment'. */
+    // "jsxImportSource": "",                            /* Specify module specifier used to import the JSX factory functions when using 'jsx: react-jsx*'. */
+    // "reactNamespace": "",                             /* Specify the object invoked for 'createElement'. This only applies when targeting 'react' JSX emit. */
+    // "noLib": true,                                    /* Disable including any library files, including the default lib.d.ts. */
+    // "useDefineForClassFields": true,                  /* Emit ECMAScript-standard-compliant class fields. */
+    // "moduleDetection": "auto",                        /* Control what method is used to detect module-format JS files. */
+
+    /* Modules */
+    "module": "ESNext" /* Specify what module code is generated. */,
+    "rootDir": "./src" /* Specify the root folder within your source files. */,
+    // "moduleResolution": "node",                       /* Specify how TypeScript looks up a file from a given module specifier. */
+    // "baseUrl": "./",                                  /* Specify the base directory to resolve non-relative module names. */
+    // "paths": {},                                      /* Specify a set of entries that re-map imports to additional lookup locations. */
+    // "rootDirs": [],                                   /* Allow multiple folders to be treated as one when resolving modules. */
+    // "typeRoots": [],                                  /* Specify multiple folders that act like './node_modules/@types'. */
+    // "types": [],                                      /* Specify type package names to be included without being referenced in a source file. */
+    // "allowUmdGlobalAccess": true,                     /* Allow accessing UMD globals from modules. */
+    // "moduleSuffixes": [],                             /* List of file name suffixes to search when resolving a module. */
+    // "resolveJsonModule": true,                        /* Enable importing .json files. */
+    // "noResolve": true,                                /* Disallow 'import's, 'require's or '<reference>'s from expanding the number of files TypeScript should add to a project. */
+
+    /* JavaScript Support */
+    // "allowJs": true,                                  /* Allow JavaScript files to be a part of your program. Use the 'checkJS' option to get errors from these files. */
+    // "checkJs": true,                                  /* Enable error reporting in type-checked JavaScript files. */
+    // "maxNodeModuleJsDepth": 1,                        /* Specify the maximum folder depth used for checking JavaScript files from 'node_modules'. Only applicable with 'allowJs'. */
+
+    /* Emit */
+    // "declaration": true,                              /* Generate .d.ts files from TypeScript and JavaScript files in your project. */
+    // "declarationMap": true,                           /* Create sourcemaps for d.ts files. */
+    // "emitDeclarationOnly": true,                      /* Only output d.ts files and not JavaScript files. */
+    "sourceMap": true /* Create source map files for emitted JavaScript files. */,
+    // "outFile": "./",                                  /* Specify a file that bundles all outputs into one JavaScript file. If 'declaration' is true, also designates a file that bundles all .d.ts output. */
+    "outDir": "./dist" /* Specify an output folder for all emitted files. */,
+    // "removeComments": true,                           /* Disable emitting comments. */
+    // "noEmit": true,                                   /* Disable emitting files from a compilation. */
+    // "importHelpers": true,                            /* Allow importing helper functions from tslib once per project, instead of including them per-file. */
+    // "importsNotUsedAsValues": "remove",               /* Specify emit/checking behavior for imports that are only used for types. */
+    // "downlevelIteration": true,                       /* Emit more compliant, but verbose and less performant JavaScript for iteration. */
+    // "sourceRoot": "",                                 /* Specify the root path for debuggers to find the reference source code. */
+    // "mapRoot": "",                                    /* Specify the location where debugger should locate map files instead of generated locations. */
+    // "inlineSourceMap": true,                          /* Include sourcemap files inside the emitted JavaScript. */
+    // "inlineSources": true,                            /* Include source code in the sourcemaps inside the emitted JavaScript. */
+    // "emitBOM": true,                                  /* Emit a UTF-8 Byte Order Mark (BOM) in the beginning of output files. */
+    // "newLine": "crlf",                                /* Set the newline character for emitting files. */
+    // "stripInternal": true,                            /* Disable emitting declarations that have '@internal' in their JSDoc comments. */
+    // "noEmitHelpers": true,                            /* Disable generating custom helper functions like '__extends' in compiled output. */
+    // "noEmitOnError": true,                            /* Disable emitting files if any type checking errors are reported. */
+    // "preserveConstEnums": true,                       /* Disable erasing 'const enum' declarations in generated code. */
+    // "declarationDir": "./",                           /* Specify the output directory for generated declaration files. */
+    // "preserveValueImports": true,                     /* Preserve unused imported values in the JavaScript output that would otherwise be removed. */
+
+    /* Interop Constraints */
+    // "isolatedModules": true,                          /* Ensure that each file can be safely transpiled without relying on other imports. */
+    // "allowSyntheticDefaultImports": true,             /* Allow 'import x from y' when a module doesn't have a default export. */
+    "esModuleInterop": true /* Emit additional JavaScript to ease support for importing CommonJS modules. This enables 'allowSyntheticDefaultImports' for type compatibility. */,
+    // "preserveSymlinks": true,                         /* Disable resolving symlinks to their realpath. This correlates to the same flag in node. */
+    "forceConsistentCasingInFileNames": true /* Ensure that casing is correct in imports. */,
+
+    /* Type Checking */
+    "strict": true /* Enable all strict type-checking options. */,
+    // "noImplicitAny": true,                            /* Enable error reporting for expressions and declarations with an implied 'any' type. */
+    // "strictNullChecks": true,                         /* When type checking, take into account 'null' and 'undefined'. */
+    // "strictFunctionTypes": true,                      /* When assigning functions, check to ensure parameters and the return values are subtype-compatible. */
+    // "strictBindCallApply": true,                      /* Check that the arguments for 'bind', 'call', and 'apply' methods match the original function. */
+    // "strictPropertyInitialization": true,             /* Check for class properties that are declared but not set in the constructor. */
+    // "noImplicitThis": true,                           /* Enable error reporting when 'this' is given the type 'any'. */
+    // "useUnknownInCatchVariables": true,               /* Default catch clause variables as 'unknown' instead of 'any'. */
+    // "alwaysStrict": true,                             /* Ensure 'use strict' is always emitted. */
+    // "noUnusedLocals": true,                           /* Enable error reporting when local variables aren't read. */
+    // "noUnusedParameters": true,                       /* Raise an error when a function parameter isn't read. */
+    // "exactOptionalPropertyTypes": true,               /* Interpret optional property types as written, rather than adding 'undefined'. */
+    // "noImplicitReturns": true,                        /* Enable error reporting for codepaths that do not explicitly return in a function. */
+    // "noFallthroughCasesInSwitch": true,               /* Enable error reporting for fallthrough cases in switch statements. */
+    // "noUncheckedIndexedAccess": true,                 /* Add 'undefined' to a type when accessed using an index. */
+    // "noImplicitOverride": true,                       /* Ensure overriding members in derived classes are marked with an override modifier. */
+    // "noPropertyAccessFromIndexSignature": true,       /* Enforces using indexed accessors for keys declared using an indexed type. */
+    // "allowUnusedLabels": true,                        /* Disable error reporting for unused labels. */
+    // "allowUnreachableCode": true,                     /* Disable error reporting for unreachable code. */
+
+    /* Completeness */
+    // "skipDefaultLibCheck": true,                      /* Skip type checking .d.ts files that are included with TypeScript. */
+    "skipLibCheck": true /* Skip type checking all .d.ts files. */
+  }
+}