initial commit.

.eslintrc.cjs

@@ -0,0 +1,12 @@
+/* eslint-env node */
+module.exports = {
+  extends: [
+    'eslint:recommended',
+    'plugin:@typescript-eslint/recommended',
+    'prettier',
+    'plugin:prettier/recommended'
+  ],
+  parser: '@typescript-eslint/parser',
+  plugins: ['@typescript-eslint'],
+  root: true
+};

.gitignore

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+dist/*
+node_modules/*
+pages/*
+*.sqlite3
+.env*

README.md

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+# How to use it
+
+0. create a dotenv .env
+1. Create a directory "pages"
+2. npm install
+3. npx tsc
+4. node dist/command.js new-user nickname "fullname"
+5. create a file pages/whatever-page.md
+6. node dist/command.js new-article nickname whatever-page "Whatever Page Title"
+7. node --env-file=.env dist/index.js
+8. curl --verbose -H 'Accept: application/activity+json' http://127.0.0.1:8080/author/nickname/outbox
+
+## dotenv contents:
+
+```
+blog_host=blog.whatever.example.net
+blog_title="Your blog title"
+port=8080
+```

knexfile.js

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+export default {
+
+  client: "sqlite3",
+  connection: {
+    filename: "./prod.sqlite3"
+  },
+  useNullAsDefault: true,
+  migrations: {
+    directory: "./migrations"
+  }
+
+};

migrations/20231225130928_init.js

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+/**
+ * @param { import("knex").Knex } knex
+ * @returns { Promise<void> }
+ */
+export const up = async function (knex) {
+    return knex.schema
+        .createTable("users", (table) => {
+            table.increments("id");
+            table.string("name").notNullable();
+            table.string("nickname").notNullable();
+            table.string("bio");
+            table.boolean("deleted").notNullable();
+            table.timestamps(true, false, false);
+        })
+        .createTable("articles", (table) => {
+            table.increments("id");
+            table.string("title").notNullable();
+            table.string("slug").notNullable().unique();
+            table.string("file").notNullable().unique();
+            table.integer("users_id");
+            table.foreign("users_id").references("users.id").onDelete("CASCADE");
+            table.boolean("deleted").notNullable();
+            table.timestamps(true, false, false);
+        })
+        .createTable("collection_types", (table) => {
+            table.integer("id").unsigned().primary();
+            table.string("name").notNullable();
+        })
+        .createTable("collections", (table) => {
+            table.increments("id");
+            table.integer("collection_types_id").notNullable();
+            table.foreign("collection_types_id").references("collection_types.id");
+            table.integer("articles_id");
+            table.foreign("articles_id").references("articles.id").onDelete("CASCADE");
+            table.integer("users_id");
+            table.foreign("users_id").references("users.id").onDelete("CASCADE");
+            table.string("value").notNullable();
+        })
+        .createTable("outboxes", (table) => {
+            table.increments("id");
+            table.integer("users_id");
+            table.foreign("users_id").references("users.id").onDelete("CASCADE");
+            table.string("verb").notNullable();
+            table.integer("articles_id");
+            table.foreign("articles_id").references("articles.id").onDelete("CASCADE");
+            table.timestamps(true, false, false);
+        })
+        .then(() => {
+            // Hardcoding these so they can be referenced by constants in code.
+            knex("collection_types").insert([
+                {
+                    id: 0,
+                    name: "followers"
+                },
+                {
+                    id: 1,
+                    name: "likes"
+                },
+                {
+                    id: 2,
+                    name: "announcements"
+                }
+            ]);
+        });
+    ;
+};
+
+/**
+ * @param { import("knex").Knex } knex
+ * @returns { Promise<void> }
+ */
+export const down = function (knex) {
+    return knex.schema
+        .dropTableIfExists("outboxes")
+        .dropTableIfExists("collections")
+        .dropTableIfExists("collection_types")
+        .dropTableIfExists("articles")
+        .dropTableIfExists("users")
+        ;
+};

module.d.ts

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+declare module "activitypub-express" {
+    function ActivitypubExpress(options: Record<string, any>);
+    export default ActivitypubExpress;
+}

package.json

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+{
+  "name": "activitypress",
+  "version": "1.0.0",
+  "description": "Activitypub-enabled Markdown blog",
+  "type": "module",
+  "main": "index.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1",
+    "new-migration": "npx knex --migrations-directory migrations --esm migrate:make"
+  },
+  "keywords": [
+    "blog",
+    "activitypub",
+    "markdown"
+  ],
+  "author": "moon@shipoclu.com",
+  "license": "AGPL-3.0",
+  "devDependencies": {
+    "@types/express": "^4.17.21",
+    "@types/markdown-it": "^13.0.7",
+    "@typescript-eslint/eslint-plugin": "^6.15.0",
+    "@typescript-eslint/parser": "^6.15.0",
+    "eslint": "^8.56.0",
+    "eslint-config-prettier": "^9.1.0",
+    "eslint-plugin-prettier": "^5.1.1",
+    "prettier": "3.1.1",
+    "ts-node": "^10.9.2",
+    "typescript": "^5.3.3"
+  },
+  "dependencies": {
+    "activitypub-express": "^4.4.1",
+    "better-sqlite3": "^9.2.2",
+    "knex": "^3.1.0",
+    "markdown-it": "^14.0.0",
+    "sqlite3": "^5.1.6",
+    "zod": "^3.22.4"
+  }
+}

src/article.ts

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+import db from "./db.js";
+import { z } from "zod";
+
+export const slugRegex = /^[a-zA-Z0-9_-]+$/;
+
+export const zArticle = z.object({
+    id: z.number().min(0),
+    title: z.string().min(1),
+    slug: z.string().regex(slugRegex).min(3).max(100),
+    file: z.string().regex(/^[a-zA-Z0-9_-]+\.md$/),
+    users_id: z.number().min(0),
+    deleted: z.boolean(),
+    created_at: z.date(),
+    updated_at: z.union([z.date(), z.null()])
+});
+
+export type Article = z.infer<typeof zArticle>;
+
+export const getBySlug = async (slug: string): Promise<Article | null> => {
+    return db<Article>("articles")
+    .where("slug", slug)
+    .first()
+    .then((rec) => !!rec ? rec : null)
+};
+
+export const getById = async (articleId: number): Promise<Article | null> => {
+    return db<Article>("articles")
+    .where("id", articleId)
+    .first()
+    .then((rec) => !!rec ? rec : null)
+};
+
+export const insert = async (userId: number, slug: string, title: string): Promise<number> => {
+    return db("articles").insert({
+        users_id: userId,
+        slug,
+        title,
+        file: `pages/${slug}.md`,
+        deleted: false,
+        created_at: new Date()
+    })
+    .returning("id")
+    .then(([{ id: id }]: { id: number }[]) => id)
+};

src/command.ts

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+import fs from "node:fs";
+import markdownit from 'markdown-it'
+import { slugRegex } from "./article.js";
+import { newUser, getId as getUserIdByNickname } from "./user.js";
+import { insert as insertArticle } from "./article.js";
+import { add as addToOutbox } from "./outbox.js";
+
+const md = markdownit();
+
+const c = process.argv[2];
+let returnCode = 0;
+
+if (c === "new-user") {
+    const nickname = process.argv[3];
+    const name = process.argv[4];
+    const bio = process.argv[5] || "";
+    const userId = await newUser(nickname, name, bio);
+    console.log(userId);
+}
+else if (c === "new-article") {
+    const nickname = process.argv[3];
+    const slug = process.argv[4];
+    const title = process.argv[5];
+    const images = process.argv.slice(6);
+
+    const userId = await getUserIdByNickname(nickname);
+    if (!userId) {
+        console.error("Nonexistent user");
+        process.exit(1);
+    }
+
+    if (!slugRegex.test(slug)) {
+        returnCode = 1;
+        console.error("Bad slug");
+        process.exit(returnCode);
+    }
+
+    const filename = `pages/${slug}.md`;
+    if (!fs.existsSync(filename)) {
+        console.error("No file with that slug");
+        process.exit(1);
+    }
+
+    const htmlFilename = `pages/${slug}.html`;
+    const markdown = fs.readFileSync(filename, "utf-8");
+    const html = md.render(markdown);
+    fs.writeFileSync(htmlFilename, html);
+
+    const articleId = await insertArticle(userId, slug, title);
+    console.log(articleId);
+
+    await addToOutbox(articleId);
+
+    process.exit(0);
+}
+else {
+    console.error("Unrecognized command: ", c);
+    returnCode = 1;
+
+    process.exit(returnCode);
+}

src/db.ts

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+import knex from "knex";
+import config from "./knexfile.js";
+
+const db = knex(config);
+
+export default db;

src/index.ts

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+import express from "express";
+import ActivitypubExpress from "activitypub-express";
+import { get as getOutbox } from "./outbox.js";
+
+const port = parseInt(process.env.port || "8080");
+const app = express();
+
+export const routes = {
+  actor: "/author/:actor",
+  object: "/o/:id",
+  activity: "/a/:id",
+  inbox: "/author/:actor/inbox",
+  outbox: "/author/:actor/outbox",
+  followers: "/author/:actor/followers",
+  following: "/author/:actor/following",
+  liked: "/author/:actor/liked",
+  collections: "/author/:actor/c/:id",
+  blocked: "/author/:actor/blocked",
+  rejections: "/author/:actor/rejections",
+  rejected: "/author/:actor/rejected",
+  shares: "/a/:id/shares",
+  likes: "/a/:id/likes",
+} as const;
+
+const SITE = ActivitypubExpress({
+  name: process.env.BLOG_NAME,
+  version: "1.0.0",
+  domain: process.env.BLOG_DOMAIN,
+  actorParam: "actor",
+  objectParam: "id",
+  activityParam: "id",
+  routes,
+  endpoints: {
+    proxyUrl: "https://localhost/proxy",
+  },
+});
+
+app.use(
+  express.json({ type: SITE.consts.jsonldTypes }),
+  express.urlencoded({ extended: true }),
+  SITE,
+);
+
+app.route(routes.inbox).get(SITE.net.inbox.get).post(SITE.net.inbox.post);
+// app.route(routes.outbox).get(SITE.net.outbox.get).post(SITE.net.outbox.post);
+app.get(routes.actor, SITE.net.actor.get);
+app.get(routes.followers, SITE.net.followers.get);
+app.get(routes.following, SITE.net.following.get);
+app.get(routes.liked, SITE.net.liked.get);
+app.get(routes.object, SITE.net.object.get);
+app.get(routes.activity, SITE.net.activityStream.get);
+app.get(routes.shares, SITE.net.shares.get);
+app.get(routes.likes, SITE.net.likes.get);
+app.get("/.well-known/webfinger", SITE.net.webfinger.get);
+app.get("/.well-known/nodeinfo", SITE.net.nodeInfoLocation.get);
+app.get("/nodeinfo/:version", SITE.net.nodeInfo.get);
+app.post("/proxy", SITE.net.proxy.post);
+
+app.get(routes.outbox, async (req, res) => {
+  const nickname = req.params.actor;
+  const body = await getOutbox(nickname).then((out) => JSON.stringify(out, null, 4));
+  res.append("Content-Type", "application/activity+json");
+  res.send(body);
+});
+
+app.get("/:slug", (req, res) => {
+});
+
+app.get("/:slug.md", (req, res) => {
+});
+
+const SERVER = app.listen(port);

src/knexfile.ts

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+export default {
+
+    client: "sqlite3",
+    connection: {
+      filename: "./prod.sqlite3"
+    },
+    useNullAsDefault: true,
+    migrations: {
+      directory: "./migrations"
+    }
+  
+  };
+  

src/outbox.ts

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+import { readFileSync } from "node:fs";
+import db from "./db.js";
+import { z } from "zod";
+import { getId as getUserId, getActor } from "./user.js";
+import { routes } from "./index.js";
+import { getById as getArticleById } from "./article.js";
+
+
+export const zRawOutboxRecord = z.object({
+    id: z.number().min(0),
+    users_id: z.number().min(0),
+    verb: z.string().regex(/^[a-zA-Z]+$/).min(1),
+    articles_id: z.number().min(0),
+    created_at: z.date(),
+    updated_at: z.union([z.date(), z.null()]),
+    slug: z.optional(z.string()),
+    file: z.optional(z.string()),
+    title: z.optional(z.string())
+});
+
+export type RawOutboxRecord = z.infer<typeof zRawOutboxRecord>;
+
+export const get = async (nickname: string): Promise<Record<string, any> | null> => {
+    const userId = await getUserId(nickname);
+
+    if (userId) {
+        const actor = getActor(nickname);
+
+        const ret = db<RawOutboxRecord>("outboxes")
+            .select("outboxes.*", "slug", "file", "title")
+            .join("articles", "outboxes.articles_id", "=", "articles.id")
+            .where("outboxes.users_id", userId)
+            .orderBy("created_at", "desc")
+            .then((recs: RawOutboxRecord[]) => {
+                const activities: Record<string, any>[] = recs.map((rec) => {
+                    const published = typeof rec.created_at === "number" ? new Date(rec.created_at) : rec.created_at;
+                    const canonicalUrl = `https://${process.env.blog_host}/${rec.slug}.html`;
+                    const context = `https://${process.env.blog_host}/c/${rec.articles_id}`;
+                    const followers = `https://${process.env.blog_host}${routes.followers.replace(":actor", nickname)}`;
+                    const activity: Record<string, any> = {
+                        id: `https://${process.env.blog_host}${routes.activity.replace(":id", rec.id.toString())}`,
+                        "@context": "https://www.w3.org/ns/activitystreams",
+                        type: rec.verb,
+                        actor,
+                        context,
+                        to: ["https://www.w3.org/ns/activitystreams#Public"],
+                        cc: [followers],
+                        published
+                    };
+
+                    const objectId = `https://${process.env.blog_host}${routes.object.replace(":id", rec.articles_id.toString())}`;
+                    const content = readFileSync(rec.file as string, "utf-8");
+                    activity.object = {
+                        id: objectId,
+                        actor,
+                        attributedTo: actor,
+                        type: "Article",
+                        context,
+                        content,
+                        to: ["https://www.w3.org/ns/activitystreams#Public"],
+                        cc: [followers],
+                        url: canonicalUrl,
+                        mediaType: "text/markdown",
+                        published
+                    };
+
+                    return activity;
+                });
+
+                const collection = {
+                    type: "OrderedCollectionPage",
+                    context: "https://www.w3.org/ns/activitystreams",
+                    id: `https://${process.env.blog_host}${routes.outbox.replace(":actor", nickname)}`,
+                    orderedItems: activities
+                };
+
+                return collection;
+            });
+
+        return ret;
+    }
+    else {
+        return null;
+    }
+};
+
+export const add = async (articleId: number): Promise<number> => {
+    const article = await getArticleById(articleId);
+
+    if (article) {
+        return await db("outboxes").insert({
+            users_id: article.id,
+            verb: "Create",
+            articles_id: articleId,
+            created_at: article.created_at
+        })
+        .returning("id")
+        .then(([{ id: id }]: { id: number }[]) => id)
+
+    }
+    else throw "failed to add to outbox";
+};

src/user.ts

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+import db from "./db.js";
+import { z } from "zod";
+import { routes } from "./index.js";
+
+export const nicknameRegex = /^[a-zA-Z0-9_]+$/;
+
+export const zUser = z.object({
+    id: z.number().min(0),
+    name: z.string().min(1),
+    nickname: z.string().regex(nicknameRegex),
+    bio: z.string(),
+    deleted: z.boolean(),
+    created_at: z.date(),
+    updated_at: z.union([z.date(), z.null()])
+});
+
+export type User = z.infer<typeof zUser>;
+
+export const getActor = (nickname: string) =>
+    "https://"
+    + process.env.blog_host
+    + routes.actor.replace(":actor", nickname);
+
+export const getNickname = async (userId: number): Promise<string | null> =>
+    db("users")
+        .select("nickname")
+        .where("id", userId)
+        .first()
+        .then((rec) => !!rec ? rec.nickname : null)
+    ;
+
+export const getId = async (nickname: string): Promise<number | null> =>
+    db("users")
+        .select("id")
+        .where("nickname", nickname)
+        .first()
+        .then((rec) => !!rec ? rec.id : null)
+    ;
+
+export const newUser = async (nickname: string, name: string, bio: string): Promise<number> => {
+    return db("users")
+        .insert({
+            name,
+            nickname,
+            bio,
+            deleted: false,
+            created_at: new Date()
+        })
+        .returning("id")
+        .then(([{ id: id }]: { id: number }[]) => id)
+        ;
+
+};

tsconfig.json

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+{
+  "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 legacy experimental 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. */
+    // "allowImportingTsExtensions": true,               /* Allow imports to include TypeScript file extensions. Requires '--moduleResolution bundler' and either '--noEmit' or '--emitDeclarationOnly' to be set. */
+    // "resolvePackageJsonExports": true,                /* Use the package.json 'exports' field when resolving package imports. */
+    // "resolvePackageJsonImports": true,                /* Use the package.json 'imports' field when resolving imports. */
+    // "customConditions": [],                           /* Conditions to set in addition to the resolver-specific defaults when resolving imports. */
+    // "resolveJsonModule": true,                        /* Enable importing .json files. */
+    // "allowArbitraryExtensions": true,                 /* Enable importing files with any extension, provided a declaration file is present. */
+    // "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. */
+    // "inlineSourceMap": true,                          /* Include sourcemap files inside the emitted JavaScript. */
+    // "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. */
+    // "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. */
+    // "verbatimModuleSyntax": true,                     /* Do not transform or elide any imports or exports not marked as type-only, ensuring they are written in the output file's format based on the 'module' setting. */
+    // "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. */
+  }
+}