Untitled

// cryptocurrency only using cookies
// User security assumptions: trust service provider, connection, browser or other user software, and the baker or cookie maker.
//

const express = require('express');
const mustache = require('mustache');
const app = express();
const Keyv = require('keyv');
const keyv = new Keyv('sqlite://./testdb.sqlite');
const TOKEN_PREFIX = 'biscuit|';
const LISTING_KEY = 'token_list';
const css_style = `
    <style> *{ font-family: sans-serif; }
            th{ text-align: center; font-weight:normal; text-decoration: underline;
                padding: 0.33em 0.67em; background: #eef
                font-variant: small-caps; text-transform: lowercase; }
            td{ text-align: center; }
            a:visited{ color: blue; }
    </style>
`

const home_html = `<!DOCTYPE html>
<html>
  <head>
    <title> Cooke Jar Tokens </title>
    ${css_style}
  </head>
  <body>
    <!-- TODO privacy and unlisted settings, etc. -->
    <title> Cooke Jar Tokens </title>
    <a href='/create'>Create</a> &ndash;
    <a href='/list'>List</a>
  </body>
</html>
`

app.use(express.urlencoded({extended: true}));
app.use(express.json());
app.get('/', function(req, res){
    res.send(home_html);
})

const create_html = `
<!DOCTYPE html>
<html>
  <head>
    <title> Create New Biscuits </title>
    ${css_style}
  </head>
  <body>
    <h1> Create New Biscuits </h1>
    <form action='' method="POST">
      <input type='hidden' name='author_name'
        value='***test-author***'/>
      <table>
        <tr><th><label for='biscuit_name'>Name</label></th>
            <td><input type='text' name='biscuit_name'></input></td></tr>
        <tr><th><label for='biscuit_quantity'>Quantity</label></th>
            <td><input type='number' name='biscuit_quantity'></input></td></tr>
        <tr><td></td><td><input type='submit'/></td></tr>
      </table>
    </form>
  </body>
</html>
`

app.get('/create', function(req, res){
    res.send(create_html);
})


const create_result_html = `
<!DOCTYPE html>
<html>
  <head>
    <title> New Biscuits Created </title>
    ${css_style}
    <!--style> *{ font-family: sans-serif; }
            th{ text-align: right; font-weight:normal; text-decoration: underline;
                padding: 0.33em 0.67em;
                font-variant: small-caps; text-transform: lowercase; }
    </style-->
  </head>
  <body>
    <h1> New Biscuits Created </h1>
    <table>
      <tr><th>Author</th><td>{{author}}</td></tr>
      <tr><th>Biscuit Name</th><td>{{name}}</td></tr>
      <tr><th>Created</th><td>{{quantity}}</td></tr>
      <tr><th>Total</th><td>{{total}}</td></tr>
    </table>
  </body>
</html>
`


app.post('/create', async function(req, res){
    // console.log('serving request: ', req);
    const author = req.body.author_name;
    const name = req.body.biscuit_name;
    const quantity = req.body.biscuit_quantity;
    const biscuit_info = {
        'author': author,
        'name': name,
        'quantity': quantity };


    const name_key = author + "|" + name;
    const token_key = TOKEN_PREFIX + name_key;
    let [listing, token_info] = await Promise.all([keyv.get(LISTING_KEY), keyv.get(token_key)]);
    if(!token_info){
      if(!listing) listing = [];
      listing.push(biscuit_info);
      await Promise.all([keyv.set(LISTING_KEY, listing), keyv.set(token_key, biscuit_info)]);
      res.send(mustache.render(create_result_html, biscuit_info));
    }
    else{
      res.send('token already exists.');
    }
})

listing_html = `<!DOCTYPE html>
<html>
  <header>
    ${css_style}
  </header>
  <body>
    <table>
      <tr><th> Author </th> <th> Name </th> <th> Quantity </th></tr>
      {{#listing}}
        <tr><td>{{author}}</td>
          <td>{{name}}</td>
          <td>{{quantity}}</td></tr>
      {{/listing}}
    </table>
  </body>
</html>
`
app.get('/list', async function(req, res){
    //token_listing = [{'name': 'currency', 'quantity': '1000000'}];
    const token_list = await keyv.get(LISTING_KEY);
    const page_data = {'listing': token_list}
    console.log('listing', token_list);
    res.send(mustache.render(listing_html, page_data));
})


const server = app.listen(8089, function(){
    const host = server.address().address;
    const port = server.address().port;

    console.log('Cookie service provider listening at %s:%s', host, port);
})