feat: Production readiness & security hardening

Author: VariableThe

.github/workflows/ci.yml

@@ -6,13 +6,16 @@ on:
     branches: [main]
 jobs:
   ci:
-    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        os: [macos-latest, ubuntu-latest, windows-latest]
+    runs-on: ${{ matrix.os }}
     steps:
       - uses: actions/checkout@v4
       - uses: actions/setup-node@v4
         with:
           node-version: '22'
-      - run: npm install
+      - run: npm ci
       - run: npm run typecheck
       - run: npm run lint
       - run: npm run format:check

.github/workflows/release.yml

@@ -1,7 +1,6 @@
 name: Release
 on:
-  push:
-    branches: [main]
+  workflow_dispatch:
 permissions:
   contents: write
 jobs:
@@ -29,7 +28,7 @@ jobs:
       - uses: actions/setup-node@v4
         with:
           node-version: '22'
-      - run: npm install
+      - run: npm ci
 
       - name: Sync package.json version
         run: npm --no-git-tag-version version ${{ needs.create-tag.outputs.new_version }}
@@ -52,6 +51,8 @@ jobs:
             release/*.exe
             release/*.AppImage
             release/*.deb
+            release/*.yml
+            release/*.blockmap
 
   update-homebrew:
     needs: [create-tag, build-and-release]

CONTRIBUTING.md

@@ -0,0 +1,29 @@
+# Contributing to PaperCache
+
+First of all, thank you for considering contributing to PaperCache!
+
+## Development Setup
+
+1. **Clone the repository:**
+   ```bash
+   git clone https://github.com/VariableThe/PaperCache.git
+   cd PaperCache
+   ```
+
+2. **Install dependencies:**
+   We strictly use `npm ci` to ensure reproducible builds.
+   ```bash
+   npm ci
+   ```
+
+3. **Start the development server:**
+   ```bash
+   npm run dev
+   ```
+
+## Development Guidelines
+- **Pull Requests Required**: Never push new features directly to the `main` branch. Always create a new branch and push your changes as a Pull Request (PR) for review.
+- **Pre-PR Checks**: Run `npm run lint` and `npm run test` before opening any PR — don't open a PR with failing checks.
+- **Performance Reporting**: Performance changes require a before/after bundle size comparison in the PR description (just paste the Vite build output).
+
+Thank you for your contributions!

SECURITY.md

@@ -0,0 +1,18 @@
+# Security Policy
+
+## Supported Versions
+
+Currently, only the latest version of PaperCache receives security updates. Please ensure you are running the most recent version available.
+
+## Reporting a Vulnerability
+
+We take the security of PaperCache seriously. If you discover a security vulnerability, we would appreciate it if you could report it privately so it can be addressed before being disclosed publicly.
+
+Please report any security issues to: **adityasharma.variable@gmail.com**
+
+When reporting, please include:
+- A description of the vulnerability.
+- Steps to reproduce the issue.
+- Any potential impact you have identified.
+
+You should receive an acknowledgment of your report within 48 hours, along with an estimated timeline for a fix. Thank you for helping keep PaperCache secure!

electron/main.ts

@@ -12,7 +12,9 @@ import {
   dialog,
   safeStorage,
   powerMonitor,
+  session,
 } from 'electron'
+import { autoUpdater } from 'electron-updater'
 import path from 'node:path'
 import { fileURLToPath } from 'node:url'
 import fs from 'node:fs'
@@ -35,8 +37,15 @@ if (!fs.existsSync(COMMANDS_DIR)) {
   fs.mkdirSync(COMMANDS_DIR)
 }
 
-fs.writeFileSync(
-  path.join(COMMANDS_DIR, 'basics.md'),
+function writeCommandFile(name: string, content: string) {
+  const filePath = path.join(COMMANDS_DIR, name)
+  if (!fs.existsSync(filePath)) {
+    fs.writeFileSync(filePath, content)
+  }
+}
+
+writeCommandFile(
+  'basics.md',
   `# Basics
 
 - **Zoom**: \`Cmd + +\` to zoom in, \`Cmd + -\` to zoom out, \`Cmd + 0\` to reset.
@@ -56,11 +65,11 @@ fs.writeFileSync(
 *Example use:* Press \`Cmd+K\` right now, select "Settings", and set your global hotkey!
 
 Next: [Folders](/file commands/folders.md)
-`,
+`
 )
 
-fs.writeFileSync(
-  path.join(COMMANDS_DIR, 'folders.md'),
+writeCommandFile(
+  'folders.md',
   `# Folders
 
 Organize your notes by using a \`/\` in the note title.
@@ -70,11 +79,11 @@ Folders automatically receive a unique color identifier in the Graph View and Se
 If you rename this note (click the title at the top left) to \`projects/PaperCache.md\`, it will automatically be placed inside a \`projects\` folder!
 
 Next: [Variables](/file commands/variables.md)
-`,
+`
 )
 
-fs.writeFileSync(
-  path.join(COMMANDS_DIR, 'variables.md'),
+writeCommandFile(
+  'variables.md',
   `# Variables & Math
 
 PaperCache is a smart scratchpad. You can define variables and write math equations that auto-calculate.
@@ -92,11 +101,11 @@ x * 3 = \u200B30
 API_KEY
 
 Next: [Markdown & Code](/file commands/markdown.md)
-`,
+`
 )
 
-fs.writeFileSync(
-  path.join(COMMANDS_DIR, 'markdown.md'),
+writeCommandFile(
+  'markdown.md',
   `# Markdown & Code
 
 PaperCache supports full markdown with seamless inline editing.
@@ -127,11 +136,11 @@ Type \`/ai <prompt>\` and press enter to summon an AI assistant directly into yo
 \`/ai Write a python function to reverse a string\`
 
 Next: [Formats & Colors](/file commands/formats.md)
-`,
+`
 )
 
-fs.writeFileSync(
-  path.join(COMMANDS_DIR, 'formats.md'),
+writeCommandFile(
+  'formats.md',
   `# Formats & Colors
 
 PaperCache automatically recognizes and highlights common formats so you can easily spot them in your notes.
@@ -146,11 +155,11 @@ Dates and times are also highlighted to help you keep track of your schedule.
 Meeting on 31-05-2024 at 14:30.
 
 Next: [Tags](/file commands/tags.md)
-`,
+`
 )
 
-fs.writeFileSync(
-  path.join(COMMANDS_DIR, 'tags.md'),
+writeCommandFile(
+  'tags.md',
   `# Tags
 
 You can tag your notes anywhere by typing an exclamation mark followed by a word (e.g., !important or !work).
@@ -163,11 +172,11 @@ When you open the search menu (\`Cmd+P\`), you'll see all your unique tags at th
 Next: [Tasks](/file commands/tasks.md)
 
 [Back to Welcome](/file Welcome.md)
-`,
+`
 )
 
-fs.writeFileSync(
-  path.join(COMMANDS_DIR, 'tasks.md'),
+writeCommandFile(
+  'tasks.md',
   `# Tasks & Reminders
 
 Stay on top of your work by using tasks!
@@ -184,17 +193,17 @@ Overdue tasks will automatically highlight in red.
 Next: [Ready](/file commands/ready.md)
 
 [Back to Welcome](/file Welcome.md)
-`,
+`
 )
 
-fs.writeFileSync(
-  path.join(COMMANDS_DIR, 'ready.md'),
+writeCommandFile(
+  'ready.md',
   `# Ready to get started?
 
 You're all set to use PaperCache! Start jotting down your thoughts, creating folders, and exploring the capabilities.
 
 [Back to Welcome](/file Welcome.md)
-`,
+`
 )
 
 const welcomePath = path.join(NOTES_DIR, 'Welcome.md')
@@ -346,6 +355,24 @@ app.on('web-contents-created', (event, contents) => {
 })
 
 app.whenReady().then(() => {
+  // Content Security Policy
+  const isDev = !!process.env.VITE_DEV_SERVER_URL;
+  session.defaultSession.webRequest.onHeadersReceived((details, callback) => {
+    callback({
+      responseHeaders: {
+        ...details.responseHeaders,
+        // unsafe-eval is required for mathjs dynamic compilation
+        'Content-Security-Policy': [
+          isDev 
+            ? "default-src 'none'; script-src 'self' 'unsafe-eval' 'unsafe-inline'; style-src 'self' 'unsafe-inline'; img-src 'self' data: https:; connect-src 'self' https: wss:; font-src 'self' data: https:; object-src 'none'; base-uri 'none';"
+            : "default-src 'none'; script-src 'self' 'unsafe-eval'; style-src 'self' 'unsafe-inline'; img-src 'self' data: https:; connect-src 'self' https:; font-src 'self' data: https:; object-src 'none'; base-uri 'none';"
+        ]
+      }
+    })
+  })
+
+  autoUpdater.checkForUpdatesAndNotify()
+
   createWindow()
 
   powerMonitor.on('suspend', () => {
@@ -379,6 +406,7 @@ app.whenReady().then(() => {
 
   const contextMenu = Menu.buildFromTemplate([
     { label: 'Show/Hide PaperCache', click: toggleWindow },
+    { label: 'Check for Updates', click: () => autoUpdater.checkForUpdatesAndNotify() },
     { type: 'separator' },
     {
       label: 'Quit',
@@ -615,11 +643,53 @@ ipcMain.on('open-settings', () => {
 })
 
 
-ipcMain.handle('openai-chat', async (_, { model, messages, apiKey, baseURL }) => {
+let memoryApiKey = ''
+try {
+  const file = fs.readFileSync(path.join(NOTES_DIR, 'config.enc'), 'utf-8')
+  if (safeStorage.isEncryptionAvailable()) {
+    memoryApiKey = safeStorage.decryptString(Buffer.from(file, 'base64'))
+  } else {
+    memoryApiKey = file
+  }
+} catch (e) {}
+
+ipcMain.handle('set-api-key', (_, key: string) => {
+  memoryApiKey = key;
+  try {
+    const dataToSave = safeStorage.isEncryptionAvailable() 
+      ? safeStorage.encryptString(key).toString('base64') 
+      : key;
+    fs.writeFileSync(path.join(NOTES_DIR, 'config.enc'), dataToSave);
+    return true;
+  } catch (e) {
+    return false;
+  }
+})
+
+ipcMain.handle('get-api-key-status', () => {
+  return !!memoryApiKey && memoryApiKey.length > 0;
+})
+
+ipcMain.on('check-for-updates', () => {
+  autoUpdater.checkForUpdatesAndNotify()
+})
+
+ipcMain.handle('openai-chat', async (_, { model, messages, baseURL }) => {
+  // Input Validation
+  if (typeof model !== 'string' || model.trim() === '') {
+    throw new Error('Invalid model provided')
+  }
+  if (!Array.isArray(messages)) {
+    throw new Error('Messages must be an array')
+  }
+  if (baseURL && typeof baseURL !== 'string') {
+    throw new Error('Invalid baseURL provided')
+  }
+
   try {
     const OpenAI = (await import('openai')).default
     const openai = new OpenAI({
-      apiKey: apiKey || 'dummy',
+      apiKey: memoryApiKey || 'dummy',
       baseURL: baseURL || undefined,
     })
     const completion = await openai.chat.completions.create({

electron/preload.ts

@@ -6,7 +6,10 @@ contextBridge.exposeInMainWorld('electronAPI', {
   saveNote: (id: string, content: string) => ipcRenderer.invoke('save-note', { id, content }),
   deleteNote: (id: string) => ipcRenderer.invoke('delete-note', id),
   renameNote: (oldId: string, newId: string) => ipcRenderer.invoke('rename-note', { oldId, newId }),
-  openAIChat: (args: { model: string, messages: { role: string; content: string }[], apiKey: string, baseURL: string }) => ipcRenderer.invoke('openai-chat', args),
+  openAIChat: (args: { model: string, messages: { role: string; content: string }[], baseURL: string }) => ipcRenderer.invoke('openai-chat', args),
+  setApiKey: (key: string) => ipcRenderer.invoke('set-api-key', key),
+  getApiKeyStatus: () => ipcRenderer.invoke('get-api-key-status'),
+  checkForUpdates: () => ipcRenderer.send('check-for-updates'),
   readNote: (id: string) => ipcRenderer.invoke('read-note', id),
   exportNote: (filename: string, content: string) =>
     ipcRenderer.invoke('export-note', filename, content),