visu/index.html at main · semperedev/visu · GitHub

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<!DOCTYPE html>
<html lang="es">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">

  <title>Preparación VISU</title>

  <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.1.3/dist/css/bootstrap.min.css"
        rel="stylesheet"
        integrity="sha384-1BmE4kWBq78iYhFldvKuhfTAU6auU8tT94WrHftjDbrCEXSU1oBoqyl2QvZ6jIW3"
        crossorigin="anonymous">

  <style>
    html, body {
      height: 100%;
    }

    [v-cloak] {
      display: none !important;
    }
  </style>

  <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.1.3/dist/js/bootstrap.bundle.min.js"
          integrity="sha384-ka7Sk0Gln4gmtz2MlQnikT1wXgYsOg+OMhuP+IlRH9sENBO0LRn5q+8nbTov4+1p"
          crossorigin="anonymous"></script>

  <script src="https://unpkg.com/vue@3.2.21"></script>
</head>

<body class="d-flex flex-column flex-grow-1 bg-dark text-light">
  <nav class="navbar navbar-dark bg-success">
    <div class="container-fluid">
      <span class="navbar-brand mb-0 h1">Preparación VISU</span>
    </div>
  </nav>

  <noscript>
    <p class="alert alert-error">Esta página necesita JavaScript para funcionar.</p>
  </noscript>

  <div class="d-flex flex-grow-1" v-cloak id="app">
    <div v-if="obj"
         class="d-flex flex-column justify-content-end flex-grow-1"
         style="background-position: center;background-repeat: no-repeat;background-size: contain;"
         v-bind:style="{ backgroundImage: 'url(media/' + obj.image + ')' }">
      <div class="d-flex justify-content-between p-3" style="background-color: rgba(0, 0, 0, .8);">
        <h4 style="text-shadow: 0 0 10px #000;">
          <i>{{ obj.name }}</i> ({{ obj.family }}) <span v-if="obj.discoverer"> - {{ obj.discoverer }}</span>
        </h4>

        <button class="btn btn-light" v-on:click="advance()">Siguiente</button>
      </div>
    </div>

    <div v-if="!obj" class="container my-3 text-center">
      <button class="btn btn-light" v-on:click="advance()">¡Comenzar!</button>
    </div>
  </div>

  <script>
    // The following code was written by P. Sempere on 3 Nov 2021
    // between 19:48 and 21:05 to help their partner with their examns
    fetch('data.json')
      .then(response => response.json())
      .then(data => {
        let indexes = new Array();
        let iterator = indexes.values();

        // To be random we generate an array of random indexes and
        // iterate over it, when we've finished the iteration, we simply
        // generate another one
        function generateIndexes() {
          // Generate a new array so we start fresh
          indexes = new Array(data.length);

          // The following loop does NOT iterate over the first position
          // so we must ensure that it always gets a value
          indexes[0] = 0;

          // https://en.wikipedia.org/wiki/Fisher%E2%80%93Yates_shuffle#The_modern_algorithm
          for (let i = indexes.length - 1; i > 0; i--) {
            const j = Math.floor(Math.random() * (i + 1));
            const temp = indexes[i] || i;
            indexes[i] = indexes[j] || j;
            indexes[j] = temp;
          }

          iterator = indexes.values();
        }

        // First generation
        generateIndexes();

        const App = {
          data() {
            return {
              obj: null,
            }
          },
          methods: {
            advance() {
              let next = iterator.next();

              if (next.done) {
                generateIndexes();

                // We assume that we have at least one item in data
                next = iterator.next();
              }

              this.obj = data[next.value];
            }
          }
        };

        Vue.createApp(App).mount('#app');
      })
      .catch(err => {
        console.error(err);

        window.alert('¡No se pudieron cargar los datos!');
      })
  </script>
</body>
</html>