db/migrations.go

@@ -1,4 +1,4 @@
-package main
+package mast
 
 import (
 	"database/sql"
@@ -6,14 +6,14 @@ import (
 
 func RunMigrations(db *sql.DB) error {
 	// Load the cr-sqlite extension
-    _, err := db.Exec("SELECT load_extension('crsqlite.so')")
+	// _, err := db.Exec("SELECT load_extension('./crsqlite.so', 'sqlite3_crsqlite_init')")
-    if err != nil {
+	// if err != nil {
-        return err
+	// 	return fmt.Errorf("failed to load cr-sqlite extension: %w", err)
-    }
+	// }
 
 	// Create the todos table and initialize it as a CRDT
-    _, err = db.Exec(`
+	_, err := db.Exec(`
-        CREATE TABLE IF NOT EXISTS todos (id INTEGER PRIMARY KEY, content TEXT);
+     CREATE TABLE IF NOT EXISTS todos (id blob PRIMARY KEY NOT NULL, content TEXT, completed INTEGER NOT NULL DEFAULT 0);
 		 SELECT crsql_as_crr('todos');
     `)
 	if err != nil {
@@ -22,4 +22,3 @@ func RunMigrations(db *sql.DB) error {
 
 	return nil
 }
-

flake.nix

@@ -8,7 +8,11 @@
   in
   {
     devShells."x86_64-linux".default = pkgs.mkShell {
-      packages = [ pkgs.go ];
+      packages = with pkgs; [ 
+        go 
+        sqlite
+        nodejs
+    ];
     };
   };
 }

go.mod

@@ -3,17 +3,30 @@ module mast
 go 1.21.6
 
 require (
-	github.com/charmbracelet/bubbletea v0.26.6 // indirect
+	github.com/charmbracelet/bubbles v0.18.0
+	github.com/charmbracelet/bubbletea v0.26.6
+	github.com/gofrs/uuid v4.4.0+incompatible
+	github.com/mattn/go-sqlite3 v1.14.22
+)
+
+require (
+	github.com/atotto/clipboard v0.1.4 // indirect
+	github.com/aymanbagabas/go-osc52/v2 v2.0.1 // indirect
+	github.com/charmbracelet/lipgloss v0.9.1 // indirect
 	github.com/charmbracelet/x/ansi v0.1.2 // indirect
 	github.com/charmbracelet/x/input v0.1.0 // indirect
 	github.com/charmbracelet/x/term v0.1.1 // indirect
 	github.com/charmbracelet/x/windows v0.1.0 // indirect
 	github.com/erikgeiser/coninput v0.0.0-20211004153227-1c3628e74d0f // indirect
+	github.com/gorilla/websocket v1.5.3 // indirect
+	github.com/lucasb-eyer/go-colorful v1.2.0 // indirect
+	github.com/mattn/go-isatty v0.0.18 // indirect
 	github.com/mattn/go-localereader v0.0.1 // indirect
 	github.com/mattn/go-runewidth v0.0.15 // indirect
-	github.com/mattn/go-sqlite3 v1.14.22 // indirect
 	github.com/muesli/ansi v0.0.0-20230316100256-276c6243b2f6 // indirect
 	github.com/muesli/cancelreader v0.2.2 // indirect
+	github.com/muesli/reflow v0.3.0 // indirect
+	github.com/muesli/termenv v0.15.2 // indirect
 	github.com/rivo/uniseg v0.4.7 // indirect
 	github.com/xo/terminfo v0.0.0-20220910002029-abceb7e1c41e // indirect
 	golang.org/x/sync v0.7.0 // indirect

go.sum

@@ -1,5 +1,13 @@
+github.com/atotto/clipboard v0.1.4 h1:EH0zSVneZPSuFR11BlR9YppQTVDbh5+16AmcJi4g1z4=
+github.com/atotto/clipboard v0.1.4/go.mod h1:ZY9tmq7sm5xIbd9bOK4onWV4S6X0u6GY7Vn0Yu86PYI=
+github.com/aymanbagabas/go-osc52/v2 v2.0.1 h1:HwpRHbFMcZLEVr42D4p7XBqjyuxQH5SMiErDT4WkJ2k=
+github.com/aymanbagabas/go-osc52/v2 v2.0.1/go.mod h1:uYgXzlJ7ZpABp8OJ+exZzJJhRNQ2ASbcXHWsFqH8hp8=
+github.com/charmbracelet/bubbles v0.18.0 h1:PYv1A036luoBGroX6VWjQIE9Syf2Wby2oOl/39KLfy0=
+github.com/charmbracelet/bubbles v0.18.0/go.mod h1:08qhZhtIwzgrtBjAcJnij1t1H0ZRjwHyGsy6AL11PSw=
 github.com/charmbracelet/bubbletea v0.26.6 h1:zTCWSuST+3yZYZnVSvbXwKOPRSNZceVeqpzOLN2zq1s=
 github.com/charmbracelet/bubbletea v0.26.6/go.mod h1:dz8CWPlfCCGLFbBlTY4N7bjLiyOGDJEnd2Muu7pOWhk=
+github.com/charmbracelet/lipgloss v0.9.1 h1:PNyd3jvaJbg4jRHKWXnCj1akQm4rh8dbEzN1p/u1KWg=
+github.com/charmbracelet/lipgloss v0.9.1/go.mod h1:1mPmG4cxScwUQALAAnacHaigiiHB9Pmr+v1VEawJl6I=
 github.com/charmbracelet/x/ansi v0.1.2 h1:6+LR39uG8DE6zAmbu023YlqjJHkYXDF1z36ZwzO4xZY=
 github.com/charmbracelet/x/ansi v0.1.2/go.mod h1:dk73KoMTT5AX5BsX0KrqhsTqAnhZZoCBjs7dGWp4Ktw=
 github.com/charmbracelet/x/input v0.1.0 h1:TEsGSfZYQyOtp+STIjyBq6tpRaorH0qpwZUj8DavAhQ=
@@ -10,8 +18,17 @@ github.com/charmbracelet/x/windows v0.1.0 h1:gTaxdvzDM5oMa/I2ZNF7wN78X/atWemG9Wp
 github.com/charmbracelet/x/windows v0.1.0/go.mod h1:GLEO/l+lizvFDBPLIOk+49gdX49L9YWMB5t+DZd0jkQ=
 github.com/erikgeiser/coninput v0.0.0-20211004153227-1c3628e74d0f h1:Y/CXytFA4m6baUTXGLOoWe4PQhGxaX0KpnayAqC48p4=
 github.com/erikgeiser/coninput v0.0.0-20211004153227-1c3628e74d0f/go.mod h1:vw97MGsxSvLiUE2X8qFplwetxpGLQrlU1Q9AUEIzCaM=
+github.com/gofrs/uuid v4.4.0+incompatible h1:3qXRTX8/NbyulANqlc0lchS1gqAVxRgsuW1YrTJupqA=
+github.com/gofrs/uuid v4.4.0+incompatible/go.mod h1:b2aQJv3Z4Fp6yNu3cdSllBxTCLRxnplIgP/c0N/04lM=
+github.com/gorilla/websocket v1.5.3 h1:saDtZ6Pbx/0u+bgYQ3q96pZgCzfhKXGPqt7kZ72aNNg=
+github.com/gorilla/websocket v1.5.3/go.mod h1:YR8l580nyteQvAITg2hZ9XVh4b55+EU/adAjf1fMHhE=
+github.com/lucasb-eyer/go-colorful v1.2.0 h1:1nnpGOrhyZZuNyfu1QjKiUICQ74+3FNCN69Aj6K7nkY=
+github.com/lucasb-eyer/go-colorful v1.2.0/go.mod h1:R4dSotOR9KMtayYi1e77YzuveK+i7ruzyGqttikkLy0=
+github.com/mattn/go-isatty v0.0.18 h1:DOKFKCQ7FNG2L1rbrmstDN4QVRdS89Nkh85u68Uwp98=
+github.com/mattn/go-isatty v0.0.18/go.mod h1:W+V8PltTTMOvKvAeJH7IuucS94S2C6jfK/D7dTCTo3Y=
 github.com/mattn/go-localereader v0.0.1 h1:ygSAOl7ZXTx4RdPYinUpg6W99U8jWvWi9Ye2JC/oIi4=
 github.com/mattn/go-localereader v0.0.1/go.mod h1:8fBrzywKY7BI3czFoHkuzRoWE9C+EiG4R1k4Cjx5p88=
+github.com/mattn/go-runewidth v0.0.12/go.mod h1:RAqKPSqVFrSLVXbA8x7dzmKdmGzieGRCM46jaSJTDAk=
 github.com/mattn/go-runewidth v0.0.15 h1:UNAjwbU9l54TA3KzvqLGxwWjHmMgBUVhBiTjelZgg3U=
 github.com/mattn/go-runewidth v0.0.15/go.mod h1:Jdepj2loyihRzMpdS35Xk/zdY8IAYHsh153qUoGf23w=
 github.com/mattn/go-sqlite3 v1.14.22 h1:2gZY6PC6kBnID23Tichd1K+Z0oS6nE/XwU+Vz/5o4kU=
@@ -20,14 +37,22 @@ github.com/muesli/ansi v0.0.0-20230316100256-276c6243b2f6 h1:ZK8zHtRHOkbHy6Mmr5D
 github.com/muesli/ansi v0.0.0-20230316100256-276c6243b2f6/go.mod h1:CJlz5H+gyd6CUWT45Oy4q24RdLyn7Md9Vj2/ldJBSIo=
 github.com/muesli/cancelreader v0.2.2 h1:3I4Kt4BQjOR54NavqnDogx/MIoWBFa0StPA8ELUXHmA=
 github.com/muesli/cancelreader v0.2.2/go.mod h1:3XuTXfFS2VjM+HTLZY9Ak0l6eUKfijIfMUZ4EgX0QYo=
+github.com/muesli/reflow v0.3.0 h1:IFsN6K9NfGtjeggFP+68I4chLZV2yIKsXJFNZ+eWh6s=
+github.com/muesli/reflow v0.3.0/go.mod h1:pbwTDkVPibjO2kyvBQRBxTWEEGDGq0FlB1BIKtnHY/8=
+github.com/muesli/termenv v0.15.2 h1:GohcuySI0QmI3wN8Ok9PtKGkgkFIk7y6Vpb5PvrY+Wo=
+github.com/muesli/termenv v0.15.2/go.mod h1:Epx+iuz8sNs7mNKhxzH4fWXGNpZwUaJKRS1noLXviQ8=
+github.com/rivo/uniseg v0.1.0/go.mod h1:J6wj4VEh+S6ZtnVlnTBMWIodfgj8LQOQFoIToxlJtxc=
 github.com/rivo/uniseg v0.2.0/go.mod h1:J6wj4VEh+S6ZtnVlnTBMWIodfgj8LQOQFoIToxlJtxc=
 github.com/rivo/uniseg v0.4.7 h1:WUdvkW8uEhrYfLC4ZzdpI2ztxP1I582+49Oc5Mq64VQ=
 github.com/rivo/uniseg v0.4.7/go.mod h1:FN3SvrM+Zdj16jyLfmOkMNblXMcoc8DfTHruCPUcx88=
 github.com/xo/terminfo v0.0.0-20220910002029-abceb7e1c41e h1:JVG44RsyaB9T2KIHavMF/ppJZNG9ZpyihvCd0w101no=
 github.com/xo/terminfo v0.0.0-20220910002029-abceb7e1c41e/go.mod h1:RbqR21r5mrJuqunuUZ/Dhy/avygyECGrLceyNeo4LiM=
+golang.org/x/exp v0.0.0-20220909182711-5c715a9e8561 h1:MDc5xs78ZrZr3HMQugiXOAkSZtfTpbJLDr/lwfgO53E=
+golang.org/x/exp v0.0.0-20220909182711-5c715a9e8561/go.mod h1:cyybsKvd6eL0RnXn6p/Grxp8F5bW7iYuBgsNCOHpMYE=
 golang.org/x/sync v0.7.0 h1:YsImfSBoP9QPYL0xyKJPq0gcaJdG3rInoqxTWbfQu9M=
 golang.org/x/sync v0.7.0/go.mod h1:Czt+wKu1gCyEFDUtn0jG5QVvpJ6rzVqr5aXyt9drQfk=
 golang.org/x/sys v0.0.0-20210809222454-d867a43fc93e/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.6.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.21.0 h1:rF+pYz3DAGSQAxAu1CbC7catZg4ebC4UIeIhKxBZvws=
 golang.org/x/sys v0.21.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
 golang.org/x/text v0.3.8 h1:nAL+RVCQ9uMn3vJZbV+MRnydTJFPf8qqY42YiA6MrqY=

js/.gitignore

@@ -0,0 +1,24 @@
+# Logs
+logs
+*.log
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+pnpm-debug.log*
+lerna-debug.log*
+
+node_modules
+dist
+dist-ssr
+*.local
+
+# Editor directories and files
+.vscode/*
+!.vscode/extensions.json
+.idea
+.DS_Store
+*.suo
+*.ntvs*
+*.njsproj
+*.sln
+*.sw?

js/.vscode/extensions.json

@@ -0,0 +1,3 @@
+{
+  "recommendations": ["svelte.svelte-vscode"]
+}

js/README.md

@@ -0,0 +1,47 @@
+# Svelte + Vite
+
+This template should help get you started developing with Svelte in Vite.
+
+## Recommended IDE Setup
+
+[VS Code](https://code.visualstudio.com/) + [Svelte](https://marketplace.visualstudio.com/items?itemName=svelte.svelte-vscode).
+
+## Need an official Svelte framework?
+
+Check out [SvelteKit](https://github.com/sveltejs/kit#readme), which is also powered by Vite. Deploy anywhere with its serverless-first approach and adapt to various platforms, with out of the box support for TypeScript, SCSS, and Less, and easily-added support for mdsvex, GraphQL, PostCSS, Tailwind CSS, and more.
+
+## Technical considerations
+
+**Why use this over SvelteKit?**
+
+- It brings its own routing solution which might not be preferable for some users.
+- It is first and foremost a framework that just happens to use Vite under the hood, not a Vite app.
+
+This template contains as little as possible to get started with Vite + Svelte, while taking into account the developer experience with regards to HMR and intellisense. It demonstrates capabilities on par with the other `create-vite` templates and is a good starting point for beginners dipping their toes into a Vite + Svelte project.
+
+Should you later need the extended capabilities and extensibility provided by SvelteKit, the template has been structured similarly to SvelteKit so that it is easy to migrate.
+
+**Why `global.d.ts` instead of `compilerOptions.types` inside `jsconfig.json` or `tsconfig.json`?**
+
+Setting `compilerOptions.types` shuts out all other types not explicitly listed in the configuration. Using triple-slash references keeps the default TypeScript setting of accepting type information from the entire workspace, while also adding `svelte` and `vite/client` type information.
+
+**Why include `.vscode/extensions.json`?**
+
+Other templates indirectly recommend extensions via the README, but this file allows VS Code to prompt the user to install the recommended extension upon opening the project.
+
+**Why enable `checkJs` in the JS template?**
+
+It is likely that most cases of changing variable types in runtime are likely to be accidental, rather than deliberate. This provides advanced typechecking out of the box. Should you like to take advantage of the dynamically-typed nature of JavaScript, it is trivial to change the configuration.
+
+**Why is HMR not preserving my local component state?**
+
+HMR state preservation comes with a number of gotchas! It has been disabled by default in both `svelte-hmr` and `@sveltejs/vite-plugin-svelte` due to its often surprising behavior. You can read the details [here](https://github.com/sveltejs/svelte-hmr/tree/master/packages/svelte-hmr#preservation-of-local-state).
+
+If you have state that's important to retain within a component, consider creating an external store which would not be replaced by HMR.
+
+```js
+// store.js
+// An extremely simple external store
+import { writable } from 'svelte/store'
+export default writable(0)
+```

js/index.html

@@ -0,0 +1,13 @@
+<!doctype html>
+<html lang="en">
+  <head>
+    <meta charset="UTF-8" />
+    <link rel="icon" type="image/svg+xml" href="/vite.svg" />
+    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
+    <title>Vite + Svelte</title>
+  </head>
+  <body>
+    <div id="app"></div>
+    <script type="module" src="/src/main.js"></script>
+  </body>
+</html>

js/jsconfig.json

@@ -0,0 +1,32 @@
+{
+  "compilerOptions": {
+    "moduleResolution": "bundler",
+    "target": "ESNext",
+    "module": "ESNext",
+    /**
+     * svelte-preprocess cannot figure out whether you have
+     * a value or a type, so tell TypeScript to enforce using
+     * `import type` instead of `import` for Types.
+     */
+    "verbatimModuleSyntax": true,
+    "isolatedModules": true,
+    "resolveJsonModule": true,
+    /**
+     * To have warnings / errors of the Svelte compiler at the
+     * correct position, enable source maps by default.
+     */
+    "sourceMap": true,
+    "esModuleInterop": true,
+    "skipLibCheck": true,
+    /**
+     * Typecheck JS in `.svelte` and `.js` files by default.
+     * Disable this if you'd like to use dynamic types.
+     */
+    "checkJs": true
+  },
+  /**
+   * Use global.d.ts instead of compilerOptions.types
+   * to avoid limiting type declarations.
+   */
+  "include": ["src/**/*.d.ts", "src/**/*.js", "src/**/*.svelte"]
+}

js/package.json

@@ -0,0 +1,22 @@
+{
+  "name": "js",
+  "private": true,
+  "version": "0.0.0",
+  "type": "module",
+  "scripts": {
+    "dev": "vite",
+    "build": "vite build",
+    "preview": "vite preview"
+  },
+  "devDependencies": {
+    "@sveltejs/vite-plugin-svelte": "^3.1.1",
+    "svelte": "^4.2.18",
+    "vite": "^5.3.4"
+  },
+  "dependencies": {
+    "@vlcn.io/crsqlite-wasm": "^0.16.0",
+    "@vlcn.io/ws-browserdb": "^0.2.0",
+    "@vlcn.io/ws-client": "^0.2.0",
+    "@vlcn.io/xplat-api": "^0.15.0"
+  }
+}

js/public/vite.svg

@@ -0,0 +1 @@
+<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" aria-hidden="true" role="img" class="iconify iconify--logos" width="31.88" height="32" preserveAspectRatio="xMidYMid meet" viewBox="0 0 256 257"><defs><linearGradient id="IconifyId1813088fe1fbc01fb466" x1="-.828%" x2="57.636%" y1="7.652%" y2="78.411%"><stop offset="0%" stop-color="#41D1FF"></stop><stop offset="100%" stop-color="#BD34FE"></stop></linearGradient><linearGradient id="IconifyId1813088fe1fbc01fb467" x1="43.376%" x2="50.316%" y1="2.242%" y2="89.03%"><stop offset="0%" stop-color="#FFEA83"></stop><stop offset="8.333%" stop-color="#FFDD35"></stop><stop offset="100%" stop-color="#FFA800"></stop></linearGradient></defs><path fill="url(#IconifyId1813088fe1fbc01fb466)" d="M255.153 37.938L134.897 252.976c-2.483 4.44-8.862 4.466-11.382.048L.875 37.958c-2.746-4.814 1.371-10.646 6.827-9.67l120.385 21.517a6.537 6.537 0 0 0 2.322-.004l117.867-21.483c5.438-.991 9.574 4.796 6.877 9.62Z"></path><path fill="url(#IconifyId1813088fe1fbc01fb467)" d="M185.432.063L96.44 17.501a3.268 3.268 0 0 0-2.634 3.014l-5.474 92.456a3.268 3.268 0 0 0 3.997 3.378l24.777-5.718c2.318-.535 4.413 1.507 3.936 3.838l-7.361 36.047c-.495 2.426 1.782 4.5 4.151 3.78l15.304-4.649c2.372-.72 4.652 1.36 4.15 3.788l-11.698 56.621c-.732 3.542 3.979 5.473 5.943 2.437l1.313-2.028l72.516-144.72c1.215-2.423-.88-5.186-3.54-4.672l-25.505 4.922c-2.396.462-4.435-1.77-3.759-4.114l16.646-57.705c.677-2.35-1.37-4.583-3.769-4.113Z"></path></svg>

js/src/App.svelte

@@ -0,0 +1,141 @@
+<script lang="ts">
+  import { onMount } from 'svelte';
+  import initWasm from '@vlcn.io/crsqlite-wasm';
+	import wasmUrl from '@vlcn.io/crsqlite-wasm/crsqlite.wasm?url';
+  import { start } from "@vlcn.io/ws-client/worker.js";
+  import { createDbProvider } from "@vlcn.io/ws-browserdb";
+
+  let db;
+	let ws;
+  let todos = [];
+  let newTodo = '';
+
+  onMount(async () => {
+    const sqlite = await initWasm(() => wasmUrl);
+    db = await sqlite.open('todo.db');
+
+		await db.exec(`
+			DROP TABLE todos;
+		`);
+    await db.exec(`
+			CREATE TABLE IF NOT EXISTS todos (
+			id BLOB PRIMARY KEY NOT NULL,
+			content TEXT,
+			completed INTEGER NOT NULL DEFAULT 0
+		);
+		SELECT crsql_as_crr('todos');
+    `);
+
+		const config = {
+      dbProvider: createDbProvider(),
+		  transportProvider: (dbName) => new WebSocket(`ws://localhost:8080/sync/${dbName}`),
+    };
+
+    start(config);
+
+		ws = new WebSocket('ws://localhost:8080/sync');
+
+		db.onUpdate(async () => {
+			const changes = await db.execA(`SELECT * FROM crsql_changes WHERE db_version > 0 AND site_id = crsql_site_id()`);
+
+			sendChangesToServer(changes);
+    });
+
+		ws.onmessage = async function(event) {
+        const { type, data } = JSON.parse(event.data);
+        if (type === 'changes') {
+            await applyChanges(data);
+        }
+    };
+
+    loadTodos();
+  });
+
+	function sendChangesToServer(changes) {
+    const formattedChanges = changes.map(change => ({
+        TableName: change[0],
+        PK: Array.isArray(change[1]) ? btoa(change[1]) : btoa(change[1]),
+        ColumnName: change[2],
+        Value: Array.isArray(change[3]) ? btoa(String.fromCharCode.apply(null, change[3])) : btoa(change[3]),
+        ColVersion: Number(change[4]),
+        DBVersion: Number(change[5]),
+        SiteID: Array.isArray(change[6]) ? arrayBufferToBase64(Uint8Array.from(change[6]).buffer) : btoa(change[6]),
+        CL: Number(change[7]),
+        Seq: Number(change[8])
+    }));
+		console.log(formattedChanges)
+
+    const message = {
+        type: "changes",
+        data: formattedChanges
+    };
+
+    ws.send(JSON.stringify(message));
+}
+
+
+  async function applyChanges(changes) {
+    await db.tx(async (tx) => {
+        for (const change of changes) {
+            await tx.exec(
+                `INSERT INTO crsql_changes VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?)`,
+                change
+            );
+        }
+    });
+	}
+
+  async function loadTodos() {
+    const result = await db.execO("SELECT * FROM todos ORDER BY id");
+    todos = result;
+  }
+
+  async function addTodo() {
+    if (newTodo.trim()) {
+      await db.exec(`
+        INSERT INTO todos (id, content, completed)
+        VALUES (lower(hex(randomblob(16))), ?, 0)
+      `, [newTodo.trim()]);
+      newTodo = '';
+      loadTodos();
+    }
+  }
+
+  async function toggleTodo(id) {
+    await db.exec(`
+      UPDATE todos
+      SET completed = NOT completed
+      WHERE id = ?
+    `, [id]);
+    loadTodos();
+  }
+</script>
+
+<main>
+  <h1>Svelte Todo with cr-sqlite</h1>
+  <input
+    bind:value={newTodo}
+    on:keypress={(e) => e.key === 'Enter' && addTodo()}
+    placeholder="Add a new todo"
+  />
+  <button on:click={addTodo}>Add Todo</button>
+  <ul>
+    {#each todos as todo}
+      <li>
+        <input
+          type="checkbox"
+          checked={todo.completed}
+          on:change={() => toggleTodo(todo.id)}
+        />
+        <span class:completed={todo.completed}>{todo.content}</span>
+      </li>
+    {/each}
+  </ul>
+</main>
+
+<style>
+  .completed {
+    text-decoration: line-through;
+  }
+</style>
+

js/src/app.css

@@ -0,0 +1,79 @@
+:root {
+  font-family: Inter, system-ui, Avenir, Helvetica, Arial, sans-serif;
+  line-height: 1.5;
+  font-weight: 400;
+
+  color-scheme: light dark;
+  color: rgba(255, 255, 255, 0.87);
+  background-color: #242424;
+
+  font-synthesis: none;
+  text-rendering: optimizeLegibility;
+  -webkit-font-smoothing: antialiased;
+  -moz-osx-font-smoothing: grayscale;
+}
+
+a {
+  font-weight: 500;
+  color: #646cff;
+  text-decoration: inherit;
+}
+a:hover {
+  color: #535bf2;
+}
+
+body {
+  margin: 0;
+  display: flex;
+  place-items: center;
+  min-width: 320px;
+  min-height: 100vh;
+}
+
+h1 {
+  font-size: 3.2em;
+  line-height: 1.1;
+}
+
+.card {
+  padding: 2em;
+}
+
+#app {
+  max-width: 1280px;
+  margin: 0 auto;
+  padding: 2rem;
+  text-align: center;
+}
+
+button {
+  border-radius: 8px;
+  border: 1px solid transparent;
+  padding: 0.6em 1.2em;
+  font-size: 1em;
+  font-weight: 500;
+  font-family: inherit;
+  background-color: #1a1a1a;
+  cursor: pointer;
+  transition: border-color 0.25s;
+}
+button:hover {
+  border-color: #646cff;
+}
+button:focus,
+button:focus-visible {
+  outline: 4px auto -webkit-focus-ring-color;
+}
+
+@media (prefers-color-scheme: light) {
+  :root {
+    color: #213547;
+    background-color: #ffffff;
+  }
+  a:hover {
+    color: #747bff;
+  }
+  button {
+    background-color: #f9f9f9;
+  }
+}

js/src/assets/svelte.svg

@@ -0,0 +1 @@
+<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" aria-hidden="true" role="img" class="iconify iconify--logos" width="26.6" height="32" preserveAspectRatio="xMidYMid meet" viewBox="0 0 256 308"><path fill="#FF3E00" d="M239.682 40.707C211.113-.182 154.69-12.301 113.895 13.69L42.247 59.356a82.198 82.198 0 0 0-37.135 55.056a86.566 86.566 0 0 0 8.536 55.576a82.425 82.425 0 0 0-12.296 30.719a87.596 87.596 0 0 0 14.964 66.244c28.574 40.893 84.997 53.007 125.787 27.016l71.648-45.664a82.182 82.182 0 0 0 37.135-55.057a86.601 86.601 0 0 0-8.53-55.577a82.409 82.409 0 0 0 12.29-30.718a87.573 87.573 0 0 0-14.963-66.244"></path><path fill="#FFF" d="M106.889 270.841c-23.102 6.007-47.497-3.036-61.103-22.648a52.685 52.685 0 0 1-9.003-39.85a49.978 49.978 0 0 1 1.713-6.693l1.35-4.115l3.671 2.697a92.447 92.447 0 0 0 28.036 14.007l2.663.808l-.245 2.659a16.067 16.067 0 0 0 2.89 10.656a17.143 17.143 0 0 0 18.397 6.828a15.786 15.786 0 0 0 4.403-1.935l71.67-45.672a14.922 14.922 0 0 0 6.734-9.977a15.923 15.923 0 0 0-2.713-12.011a17.156 17.156 0 0 0-18.404-6.832a15.78 15.78 0 0 0-4.396 1.933l-27.35 17.434a52.298 52.298 0 0 1-14.553 6.391c-23.101 6.007-47.497-3.036-61.101-22.649a52.681 52.681 0 0 1-9.004-39.849a49.428 49.428 0 0 1 22.34-33.114l71.664-45.677a52.218 52.218 0 0 1 14.563-6.398c23.101-6.007 47.497 3.036 61.101 22.648a52.685 52.685 0 0 1 9.004 39.85a50.559 50.559 0 0 1-1.713 6.692l-1.35 4.116l-3.67-2.693a92.373 92.373 0 0 0-28.037-14.013l-2.664-.809l.246-2.658a16.099 16.099 0 0 0-2.89-10.656a17.143 17.143 0 0 0-18.398-6.828a15.786 15.786 0 0 0-4.402 1.935l-71.67 45.674a14.898 14.898 0 0 0-6.73 9.975a15.9 15.9 0 0 0 2.709 12.012a17.156 17.156 0 0 0 18.404 6.832a15.841 15.841 0 0 0 4.402-1.935l27.345-17.427a52.147 52.147 0 0 1 14.552-6.397c23.101-6.006 47.497 3.037 61.102 22.65a52.681 52.681 0 0 1 9.003 39.848a49.453 49.453 0 0 1-22.34 33.12l-71.664 45.673a52.218 52.218 0 0 1-14.563 6.398"></path></svg>

js/src/lib/Counter.svelte

@@ -0,0 +1,10 @@
+<script>
+  let count = 0
+  const increment = () => {
+    count += 1
+  }
+</script>
+
+<button on:click={increment}>
+  count is {count}
+</button>

js/src/main.js

@@ -0,0 +1,8 @@
+import './app.css'
+import App from './App.svelte'
+
+const app = new App({
+  target: document.getElementById('app'),
+})
+
+export default app

js/src/vite-env.d.ts

@@ -0,0 +1,2 @@
+/// <reference types="svelte" />
+/// <reference types="vite/client" />

js/svelte.config.js

@@ -0,0 +1,7 @@
+import { vitePreprocess } from '@sveltejs/vite-plugin-svelte'
+
+export default {
+  // Consult https://svelte.dev/docs#compile-time-svelte-preprocess
+  // for more information about preprocessors
+  preprocess: vitePreprocess(),
+}

js/vite.config.js

@@ -0,0 +1,17 @@
+import { defineConfig } from 'vite'
+import { svelte } from '@sveltejs/vite-plugin-svelte'
+
+// https://vitejs.dev/config/
+export default defineConfig({
+  plugins: [svelte()],
+  optimizeDeps: {
+    exclude: ['@vlcn.io/crsqlite-wasm'],
+  },
+  server: {
+    headers: {
+      'Cross-Origin-Opener-Policy': 'same-origin',
+      'Cross-Origin-Embedder-Policy': 'require-corp',
+    },
+  },
+});
+

main.go

@@ -2,48 +2,147 @@ package main
 
 import (
 	"database/sql"
+	"encoding/base64"
 	"fmt"
+	"log"
 	"os"
 
+	"mast/db"
+
+	"github.com/charmbracelet/bubbles/textinput"
 	tea "github.com/charmbracelet/bubbletea"
-    _ "github.com/mattn/go-sqlite3"
+	uuid "github.com/gofrs/uuid"
-		"git.sealight.xyz/aynish/mast/db"
+	"github.com/gorilla/websocket"
+	sqlite3 "github.com/mattn/go-sqlite3"
 )
 
 type model struct {
 	db        *sql.DB
+	conn      *websocket.Conn
 	todos     []string
 	cursor    int
+	textInput textinput.Model
+	inputting bool
 }
 
 func initialModel() model {
-    db, err := sql.Open("sqlite3", ":memory:")
+	sql.Register("sqlite3_with_extensions",
+		&sqlite3.SQLiteDriver{
+			Extensions: []string{
+				"./db/crsqlite.so",
+			},
+		})
+	db, err := sql.Open("sqlite3_with_extensions", "db.sqlite")
 	if err != nil {
 		panic(err)
 	}
 
-    err = RunMigrations(db)
+	err = mast.RunMigrations(db)
 	if err != nil {
 		panic(err)
 	}
 
+	ti := textinput.New()
+	ti.Placeholder = "Add a new todo"
+	ti.Focus()
+
+	conn, _, err := websocket.DefaultDialer.Dial("ws://localhost:8080/sync", nil)
+	if err != nil {
+			log.Println("Error connecting to WebSocket:", err)
+			panic(err)
+	}
+
 	m := model{
 		db:        db,
+		conn:      conn,
 		todos:     []string{},
 		cursor:    0,
+		textInput: ti,
+		inputting: false,
 	}
 	m.loadTodos()
 	return m
 }
 
+type CRSQLChange struct {
+    TableName   string
+    PK          string
+    ColumnName  string
+    Value       string
+    ColVersion  int64
+    DBVersion   int64
+    SiteID      string
+    CL          int64
+    Seq         int64
+}
+
+
 func (m *model) addTodo(todo string) {
-    _, err := m.db.Exec("INSERT INTO todos (content) VALUES (?)", todo)
+	id, err := uuid.NewV7()
+	if err != nil {
+		panic("Error generating new UUID")
+	}
+	_, err = m.db.Exec(`
+			INSERT INTO todos (id, content)
+			VALUES (?, ?)
+	`, id.String(), todo)
 	if err != nil {
 		panic(err)
 	}
+
+        rows, err := m.db.Query("SELECT * FROM crsql_changes")
+        if err != nil {
+            log.Println("Error querying crsql_changes:", err)
+            return
+        }
+        defer rows.Close()
+
+        var changes []CRSQLChange
+        for rows.Next() {
+            var change CRSQLChange
+						var pkRaw []byte
+						var valueRaw []byte
+						var siteIDRaw []byte
+						err := rows.Scan(&change.TableName, &pkRaw, &change.ColumnName, &valueRaw, 
+                 &change.ColVersion, &change.DBVersion, &siteIDRaw, &change.CL, &change.Seq)
+
+            if err != nil {
+                log.Println("Error scanning change:", err)
+                return
+            }
+						change.PK = base64.StdEncoding.EncodeToString(pkRaw)
+						change.Value = base64.StdEncoding.EncodeToString(valueRaw)
+						change.SiteID = base64.StdEncoding.EncodeToString(siteIDRaw)
+
+
+            changes = append(changes, change)
+						fmt.Println(change)
+        }
+
+        if len(changes) > 0 {
+            m.sendToWebSocket(changes)
+        }
+
 	m.loadTodos()
 }
 
+func (m *model) sendToWebSocket(changes []CRSQLChange) {
+    message := struct {
+        Type string        `json:"type"`
+        Data []CRSQLChange `json:"data"`
+    }{
+        Type: "changes",
+        Data: changes,
+    }
+
+		err := m.conn.WriteJSON(message)
+    if err != nil {
+        log.Println("Error sending changes to WebSocket:", err)
+				panic(err)
+    }
+}
+
+
 func (m *model) loadTodos() {
 	rows, err := m.db.Query("SELECT content FROM todos")
 	if err != nil {
@@ -66,16 +165,45 @@ func (m model) Init() tea.Cmd {
 }
 
 func (m model) Update(msg tea.Msg) (tea.Model, tea.Cmd) {
+	var cmd tea.Cmd
+
 	switch msg := msg.(type) {
 	case tea.KeyMsg:
 		switch msg.String() {
 		case "ctrl+c", "q":
-            return m, tea.Quit
+			return m, m.quit()
+		case "j", "down":
+			m.cursor = (m.cursor + 1) % len(m.todos)
+		case "k", "up":
+			m.cursor = (m.cursor - 1 + len(m.todos)) % len(m.todos)
+		case "a":
+			if !m.inputting {
+				m.inputting = true
+				return m, textinput.Blink
+			}
+		case "enter":
+			if m.inputting {
+				m.addTodo(m.textInput.Value())
+				m.textInput.Reset()
+				m.inputting = false
 			}
 		}
+	}
+
+	if m.inputting {
+		m.textInput, cmd = m.textInput.Update(msg)
+		return m, cmd
+	}
+
 	return m, nil
 }
 
+func (m model) quit() tea.Cmd {
+    m.db.Close()
+		m.conn.Close()
+    return tea.Quit
+}
+
 func (m model) View() string {
 	s := "Todo List:\n\n"
 	for i, todo := range m.todos {
@@ -85,7 +213,12 @@ func (m model) View() string {
 		}
 		s += fmt.Sprintf("%s %s\n", cursor, todo)
 	}
-    s += "\nPress q to quit.\n"
+	s += "\nPress 'a' to add a new todo, 'q' to quit.\n"
+
+	if m.inputting {
+		s += "\n" + m.textInput.View()
+	}
+
 	return s
 }
 

server/main.go

@@ -0,0 +1,210 @@
+package main
+
+import (
+	"database/sql"
+	"strconv"
+	"strings"
+	"encoding/json"
+	"fmt"
+	"log"
+	"net/http"
+	"encoding/base64"
+
+	"mast/db"
+	"github.com/gorilla/websocket"
+	sqlite3 "github.com/mattn/go-sqlite3"
+)
+
+var upgrader = websocket.Upgrader{
+    CheckOrigin: func(r *http.Request) bool {
+        return true
+    },
+}
+
+var db *sql.DB
+var clients = make(map[*websocket.Conn]bool)
+
+func handleWebSocket(w http.ResponseWriter, r *http.Request) {
+    conn, err := upgrader.Upgrade(w, r, nil)
+    if err != nil {
+        log.Println(err)
+        return
+    }
+    defer conn.Close()
+
+    for {
+        _, message, err := conn.ReadMessage()
+        if err != nil {
+            log.Println(err)
+            return
+        }
+
+        var msg struct {
+            Type string        `json:"type"`
+            Data []interface{} `json:"data"`
+        }
+        if err := json.Unmarshal(message, &msg); err != nil {
+            log.Println("Error unmarshaling message:", err)
+            continue
+        }
+
+        if msg.Type == "changes" {
+					fmt.Println("We're applying changes!!")
+            applyChanges(msg.Data)
+        }
+    }
+}
+
+func printChange(change interface{}) {
+			// Attempt to type assert and print more details
+			if c, ok := change.(map[string]interface{}); ok {
+					for key, value := range c {
+							fmt.Printf("  %s: %v\n", key, value)
+					}
+			} else {
+					fmt.Printf("  Not a map: %T\n", change)
+			}
+}
+
+func printChanges(changes []interface{}) {
+    for i, change := range changes {
+        fmt.Printf("Change %d: %+v\n", i, change)
+				printChange(change)
+    }
+}
+
+type CRSQLChange struct {
+    TableName   string
+    PK          []byte
+    ColumnName  string
+    Value       []byte
+    ColVersion  int64
+    DBVersion   int64
+    SiteID      []byte
+    CL          int64
+    Seq         int64
+}
+
+func mapToCRSQLChange(m map[string]interface{}) (CRSQLChange, error) {
+	var err error
+    change := CRSQLChange{}
+    
+    change.TableName = m["TableName"].(string)
+    change.ColumnName = m["ColumnName"].(string)
+    change.ColVersion = int64(m["ColVersion"].(float64))
+    change.DBVersion = int64(m["DBVersion"].(float64))
+    change.CL = int64(m["CL"].(float64))
+    change.Seq = int64(m["Seq"].(float64))
+    
+    // Handle []byte fields
+		change.PK, err = base64.URLEncoding.DecodeString(m["PK"].(string))
+		if err != nil {
+			return change, err
+		}
+		//fmt.Println(m["PK"])
+		//fmt.Println(m["PK"].(string))
+		//fmt.Println(base64.URLEncoding.DecodeString(m["PK"].(string)))
+    change.Value, err = base64.URLEncoding.DecodeString(m["Value"].(string))
+		if err != nil {
+			return change, err
+		}
+    //change.SiteID, err = decodeBase64ToIntArray(m["SiteID"].(string))
+    change.SiteID, err = base64.URLEncoding.DecodeString(m["SiteID"].(string))
+		if err != nil {
+			return change, err
+		}
+
+    return change, nil
+}
+
+
+func decodeBase64ToIntArray(encodedString string) ([]int, error) {
+    // Decode the base64 string
+    decodedBytes, err := base64.StdEncoding.DecodeString(encodedString)
+    if err != nil {
+        return nil, fmt.Errorf("error decoding base64: %w", err)
+    }
+
+    // Convert bytes to string
+    decodedString := string(decodedBytes)
+
+    // Split the string by commas
+    stringSlice := strings.Split(decodedString, ",")
+
+    // Convert each string to an integer
+    intSlice := make([]int, len(stringSlice))
+    for i, s := range stringSlice {
+        num, err := strconv.Atoi(s)
+        if err != nil {
+            return nil, fmt.Errorf("error converting string to int: %w", err)
+        }
+        intSlice[i] = num
+    }
+
+    return intSlice, nil
+}
+
+
+func applyChanges(changes []interface{}) {
+    tx, _ := db.Begin()
+    for i, change := range changes {
+			fmt.Println("Change number: ", i)
+			fmt.Println(change)
+			if changeMap, ok := change.(map[string]interface{}); ok {
+					c, err := mapToCRSQLChange(changeMap)
+					if err != nil {
+							fmt.Println("Error converting to CRSQLChange:", err)
+							continue
+					}
+					_, err = tx.Exec(`INSERT INTO crsql_changes VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?)`,
+											c.TableName, c.PK, c.ColumnName, c.Value, c.ColVersion, c.DBVersion, c.SiteID, c.CL, c.Seq)
+					if err != nil {
+							log.Println("Error inserting change:", err)
+					}
+					log.Println("We inserted data successfully??")
+					printChange(change)
+				} else {
+					fmt.Println("Not OK to convert change")
+					fmt.Println("Change look like:")
+					printChange(change)
+					continue
+				}
+    }
+    tx.Commit()
+}
+
+
+func broadcastChanges(sender *websocket.Conn, changes interface{}) {
+    for client := range clients {
+        if client != sender {
+            client.WriteJSON(map[string]interface{}{"type": "changes", "data": changes})
+        }
+    }
+}
+func main() {
+    var err error
+		val, err := base64.StdEncoding.DecodeString("MTY3LDU0LDQ5LDY3LDExMyw2MCw3NiwxMjAsMTU2LDExMCwyMjcsMTc2LDE4NCwyMjksMjQxLDE0Mw==")
+		decoded, _ := base64.StdEncoding.DecodeString("MTY3LDU0LDQ5LDY3LDExMyw2MCw3NiwxMjAsMTU2LDExMCwyMjcsMTc2LDE4NCwyMjksMjQxLDE0Mw==")
+		if err != nil {
+			log.Fatal("error:", err)
+		}
+		fmt.Printf("%q\n", val)
+		fmt.Printf("%q\n", decoded)
+		sql.Register("sqlite3_with_extensions",
+		&sqlite3.SQLiteDriver{
+			Extensions: []string{
+				"../db/crsqlite.so",
+			},
+		})
+    db, err = sql.Open("sqlite3_with_extensions", "./todo.sqlite")
+    if err != nil {
+        log.Fatal(err)
+    }
+	err = mast.RunMigrations(db)
+    defer db.Close()
+
+    // Initialize database and tables...
+    http.HandleFunc("/sync", handleWebSocket)
+    log.Fatal(http.ListenAndServe(":8080", nil))
+}
+