chore: init

.firebaserc

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+{
+  "projects": {
+    "default": "github-telegram"
+  }
+}

.gitignore

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+# Logs
+logs
+*.log
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+firebase-debug.log*
+firebase-debug.*.log*
+
+# Firebase cache
+.firebase/
+
+# Firebase config
+
+# Uncomment this if you'd like others to create their own Firebase project.
+# For a team working on the same Firebase project(s), it is recommended to leave
+# it commented so all members can deploy to the same project(s) in .firebaserc.
+# .firebaserc
+
+# Runtime data
+pids
+*.pid
+*.seed
+*.pid.lock
+
+# Directory for instrumented libs generated by jscoverage/JSCover
+lib-cov
+
+# Coverage directory used by tools like istanbul
+coverage
+
+# nyc test coverage
+.nyc_output
+
+# Grunt intermediate storage (http://gruntjs.com/creating-plugins#storing-task-files)
+.grunt
+
+# Bower dependency directory (https://bower.io/)
+bower_components
+
+# node-waf configuration
+.lock-wscript
+
+# Compiled binary addons (http://nodejs.org/api/addons.html)
+build/Release
+
+# Dependency directories
+node_modules/
+
+# 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 variables file
+.env

database.rules.json

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+{
+  /* Visit https://firebase.google.com/docs/database/security to learn more about security rules. */
+  "rules": {
+    ".read": false,
+    ".write": false
+  }
+}

firebase.json

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+{
+  "database": {
+    "rules": "database.rules.json"
+  },
+  "functions": {
+    "predeploy": [
+      "npm --prefix \"$RESOURCE_DIR\" run lint",
+      "npm --prefix \"$RESOURCE_DIR\" run build"
+    ]
+  },
+  "hosting": {
+    "public": "public",
+    "ignore": [
+      "firebase.json",
+      "**/.*",
+      "**/node_modules/**"
+    ],
+    "rewrites": [
+      {
+        "source": "**",
+        "destination": "/index.html"
+      }
+    ]
+  },
+  "emulators": {
+    "auth": {
+      "port": 9099
+    },
+    "functions": {
+      "port": 5001
+    },
+    "database": {
+      "port": 9000
+    },
+    "hosting": {
+      "port": 5000
+    },
+    "ui": {
+      "enabled": true
+    }
+  }
+}

functions/.eslintrc.js

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+module.exports = {
+  root: true,
+  env: {
+    es6: true,
+    node: true,
+  },
+  extends: [
+    "eslint:recommended",
+    "plugin:import/errors",
+    "plugin:import/warnings",
+    "plugin:import/typescript",
+    "google",
+    "plugin:@typescript-eslint/recommended",
+  ],
+  parser: "@typescript-eslint/parser",
+  parserOptions: {
+    project: ["tsconfig.json", "tsconfig.dev.json"],
+    sourceType: "module",
+  },
+  ignorePatterns: [
+    "/lib/**/*", // Ignore built files.
+  ],
+  plugins: [
+    "@typescript-eslint",
+    "import",
+  ],
+  rules: {
+    "quotes": ["error", "double"],
+    "import/no-unresolved": 0,
+  },
+};

functions/.gitignore

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+# Compiled JavaScript files
+lib/**/*.js
+lib/**/*.js.map
+
+# TypeScript v1 declaration files
+typings/
+
+# Node.js dependency directory
+node_modules/

functions/package.json

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+{
+  "name": "functions",
+  "scripts": {
+    "lint": "eslint --ext .js,.ts .",
+    "build": "tsc",
+    "serve": "npm run build && firebase emulators:start --only functions",
+    "shell": "npm run build && firebase functions:shell",
+    "start": "npm run shell",
+    "deploy": "firebase deploy --only functions",
+    "logs": "firebase functions:log"
+  },
+  "engines": {
+    "node": "16"
+  },
+  "main": "lib/index.js",
+  "dependencies": {
+    "firebase-admin": "^9.8.0",
+    "firebase-functions": "^3.14.1"
+  },
+  "devDependencies": {
+    "@typescript-eslint/eslint-plugin": "^3.9.1",
+    "@typescript-eslint/parser": "^3.8.0",
+    "eslint": "^7.6.0",
+    "eslint-config-google": "^0.14.0",
+    "eslint-plugin-import": "^2.22.0",
+    "firebase-functions-test": "^0.2.0",
+    "typescript": "^3.8.0"
+  },
+  "private": true
+}

functions/src/index.ts

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+import * as functions from "firebase-functions";
+
+// // Start writing Firebase Functions
+// // https://firebase.google.com/docs/functions/typescript
+//
+// export const helloWorld = functions.https.onRequest((request, response) => {
+//   functions.logger.info("Hello logs!", {structuredData: true});
+//   response.send("Hello from Firebase!");
+// });

functions/tsconfig.dev.json

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+{
+  "include": [
+    ".eslintrc.js"
+  ]
+}

functions/tsconfig.json

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+{
+  "compilerOptions": {
+    "module": "commonjs",
+    "noImplicitReturns": true,
+    "noUnusedLocals": true,
+    "outDir": "lib",
+    "sourceMap": true,
+    "strict": true,
+    "target": "es2017"
+  },
+  "compileOnSave": true,
+  "include": [
+    "src"
+  ]
+}

public/index.html

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+<!DOCTYPE html>
+<html>
+  <head>
+    <meta charset="utf-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1">
+    <title>Welcome to Firebase Hosting</title>
+
+    <!-- update the version number as needed -->
+    <script defer src="/__/firebase/9.6.6/firebase-app-compat.js"></script>
+    <!-- include only the Firebase features as you need -->
+    <script defer src="/__/firebase/9.6.6/firebase-auth-compat.js"></script>
+    <script defer src="/__/firebase/9.6.6/firebase-database-compat.js"></script>
+    <script defer src="/__/firebase/9.6.6/firebase-firestore-compat.js"></script>
+    <script defer src="/__/firebase/9.6.6/firebase-functions-compat.js"></script>
+    <script defer src="/__/firebase/9.6.6/firebase-messaging-compat.js"></script>
+    <script defer src="/__/firebase/9.6.6/firebase-storage-compat.js"></script>
+    <script defer src="/__/firebase/9.6.6/firebase-analytics-compat.js"></script>
+    <script defer src="/__/firebase/9.6.6/firebase-remote-config-compat.js"></script>
+    <script defer src="/__/firebase/9.6.6/firebase-performance-compat.js"></script>
+    <!-- 
+      initialize the SDK after all desired features are loaded, set useEmulator to false
+      to avoid connecting the SDK to running emulators.
+    -->
+    <script defer src="/__/firebase/init.js?useEmulator=true"></script>
+
+    <style media="screen">
+      body { background: #ECEFF1; color: rgba(0,0,0,0.87); font-family: Roboto, Helvetica, Arial, sans-serif; margin: 0; padding: 0; }
+      #message { background: white; max-width: 360px; margin: 100px auto 16px; padding: 32px 24px; border-radius: 3px; }
+      #message h2 { color: #ffa100; font-weight: bold; font-size: 16px; margin: 0 0 8px; }
+      #message h1 { font-size: 22px; font-weight: 300; color: rgba(0,0,0,0.6); margin: 0 0 16px;}
+      #message p { line-height: 140%; margin: 16px 0 24px; font-size: 14px; }
+      #message a { display: block; text-align: center; background: #039be5; text-transform: uppercase; text-decoration: none; color: white; padding: 16px; border-radius: 4px; }
+      #message, #message a { box-shadow: 0 1px 3px rgba(0,0,0,0.12), 0 1px 2px rgba(0,0,0,0.24); }
+      #load { color: rgba(0,0,0,0.4); text-align: center; font-size: 13px; }
+      @media (max-width: 600px) {
+        body, #message { margin-top: 0; background: white; box-shadow: none; }
+        body { border-top: 16px solid #ffa100; }
+      }
+    </style>
+  </head>
+  <body>
+    <div id="message">
+      <h2>Welcome</h2>
+      <h1>Firebase Hosting Setup Complete</h1>
+      <p>You're seeing this because you've successfully setup Firebase Hosting. Now it's time to go build something extraordinary!</p>
+      <a target="_blank" href="https://firebase.google.com/docs/hosting/">Open Hosting Documentation</a>
+    </div>
+    <p id="load">Firebase SDK Loading&hellip;</p>
+
+    <script>
+      document.addEventListener('DOMContentLoaded', function() {
+        const loadEl = document.querySelector('#load');
+        // // 🔥🔥🔥🔥🔥🔥🔥🔥🔥🔥🔥🔥🔥🔥🔥🔥🔥🔥🔥🔥🔥🔥🔥🔥🔥🔥🔥🔥🔥🔥🔥
+        // // The Firebase SDK is initialized and available here!
+        //
+        // firebase.auth().onAuthStateChanged(user => { });
+        // firebase.database().ref('/path/to/ref').on('value', snapshot => { });
+        // firebase.firestore().doc('/foo/bar').get().then(() => { });
+        // firebase.functions().httpsCallable('yourFunction')().then(() => { });
+        // firebase.messaging().requestPermission().then(() => { });
+        // firebase.storage().ref('/path/to/ref').getDownloadURL().then(() => { });
+        // firebase.analytics(); // call to activate
+        // firebase.analytics().logEvent('tutorial_completed');
+        // firebase.performance(); // call to activate
+        //
+        // // 🔥🔥🔥🔥🔥🔥🔥🔥🔥🔥🔥🔥🔥🔥🔥🔥🔥🔥🔥🔥🔥🔥🔥🔥🔥🔥🔥🔥🔥🔥🔥
+
+        try {
+          let app = firebase.app();
+          let features = [
+            'auth', 
+            'database', 
+            'firestore',
+            'functions',
+            'messaging', 
+            'storage', 
+            'analytics', 
+            'remoteConfig',
+            'performance',
+          ].filter(feature => typeof app[feature] === 'function');
+          loadEl.textContent = `Firebase SDK loaded with ${features.join(', ')}`;
+        } catch (e) {
+          console.error(e);
+          loadEl.textContent = 'Error loading the Firebase SDK, check the console.';
+        }
+      });
+    </script>
+  </body>
+</html>