index.js

---
---
// Scaffolded from: https://router.vuejs.org/guide/#javascript

function getQueryVariable(variable) {
    var query = window.location.search.substring(1);
    var vars = query.split('&');
    for (var i = 0; i < vars.length; i++) {
        var pair = vars[i].split('=');
        if (decodeURIComponent(pair[0]) == variable) {
            return decodeURIComponent(pair[1]);
        }
    }
    console.log('Query variable %s not found', variable);
}

// Redirect before entering the route.
const routes = [
  { path: '/',
    beforeEnter(to, from, next) {
      if (!["1", "true", "yes"].includes(getQueryVariable('redirect'))) {
        return
      }
      const key = '{{ site.gsheet.key }}'
      const id = '{{ site.gsheet.sheet_id }}'
      const csvUrl = `https://docs.google.com/spreadsheets/d/${key}/export?format=csv&id=${key}&gid=${id}`
      Papa.parse(csvUrl, {
        download: true,
        header: true,
        complete: function(results, file) {
          var currentEvent
          // Assumes rows are events listed from past to future.
          // TODO: Sort data by date
          for (let row of results.data) {
            const dateHeader = '{{ site.gsheet.date_header }}'
            console.log(row[dateHeader])
            // Don't roll-over to next week's info until late-night and event's done.
            var date = luxon.DateTime.fromISO(row[dateHeader])
              .setZone('America/Toronto')
              .set({hour: 23, minute: 59})
            currentEvent = row
            if (isFuture(date)) {
              // Stop looking after first future event found.
              break
            }
          }
          const contentHeader = '{{ site.gsheet.content_header }}'
          var tweetStubContent = currentEvent[contentHeader]
          if (!/\B(?:\#|\@)[a-zA-Z_]+\b/.test(tweetStubContent)) {
            tweetStubContent = '{{ site.default_tweet }}'
          }
          const redirectUrl = 'https://twitter.com/intent/tweet?text=' + encodeURIComponent(tweetStubContent)
          window.location.replace(redirectUrl)
        },
      })
    },
  },
]

// Check whether the day in question has passed.
// This will work until the day after the event.
var isFuture = function (date) {
  const now = luxon.DateTime.local()
  if (now < date) {
    return true
  } else {
    return false
  }
}

// 3. Create the router instance and pass the `routes` option
// You can pass in additional options here, but let's
// keep it simple for now.
const router = new VueRouter({
  routes // short for `routes: routes`
})

// 4. Create and mount the root instance.
// Make sure to inject the router with the router option to make the
// whole app router-aware.
const app = new Vue({
  router
}).$mount('#app')

// Now the app has started!