Feature/polls attempt 2

src/components/poll/poll.js

@@ -0,0 +1,107 @@
+import Timeago from '../timeago/timeago.vue'
+import { forEach, map } from 'lodash'
+
+export default {
+  name: 'Poll',
+  props: ['poll', 'statusId'],
+  components: { Timeago },
+  data () {
+    return {
+      loading: false,
+      choices: [],
+      refreshInterval: null
+    }
+  },
+  created () {
+    this.refreshInterval = setTimeout(this.refreshPoll, 30 * 1000)
+    // Initialize choices to booleans and set its length to match options
+    this.choices = this.poll.options.map(_ => false)
+  },
+  destroyed () {
+    clearTimeout(this.refreshInterval)
+  },
+  computed: {
+    expired () {
+      return Date.now() > Date.parse(this.poll.expires_at)
+    },
+    loggedIn () {
+      return this.$store.state.users.currentUser
+    },
+    showResults () {
+      return this.poll.voted || this.expired || !this.loggedIn
+    },
+    totalVotesCount () {
+      return this.poll.votes_count
+    },
+    expiresAt () {
+      return Date.parse(this.poll.expires_at).toLocaleString()
+    },
+    containerClass () {
+      return {
+        loading: this.loading
+      }
+    },
+    choiceIndices () {
+      // Convert array of booleans into an array of indices of the
+      // items that were 'true', so [true, false, false, true] becomes
+      // [0, 3].
+      return this.choices
+        .map((entry, index) => entry && index)
+        .filter(value => typeof value === 'number')
+    },
+    isDisabled () {
+      const noChoice = this.choiceIndices.length === 0
+      return this.loading || noChoice
+    }
+  },
+  methods: {
+    refreshPoll () {
+      if (this.expired) return
+      this.fetchPoll()
+      this.refreshInterval = setTimeout(this.refreshPoll, 30 * 1000)
+    },
+    percentageForOption (count) {
+      return this.totalVotesCount === 0 ? 0 : Math.round(count / this.totalVotesCount * 100)
+    },
+    resultTitle (option) {
+      return `${option.votes_count}/${this.totalVotesCount} ${this.$t('polls.votes')}`
+    },
+    fetchPoll () {
+      this.$store.dispatch('refreshPoll', { id: this.statusId, pollId: this.poll.id })
+    },
+    activateOption (index) {
+      // forgive me father: doing checking the radio/checkboxes
+      // in code because of customized input elements need either
+      // a) an extra element for the actual graphic, or b) use a
+      // pseudo element for the label. We use b) which mandates
+      // using "for" and "id" matching which isn't nice when the
+      // same poll appears multiple times on the site (notifs and
+      // timeline for example). With code we can make sure it just
+      // works without altering the pseudo element implementation.
+      const allElements = this.$el.querySelectorAll('input')
+      const clickedElement = this.$el.querySelector(`input[value="${index}"]`)
+      if (this.poll.multiple) {
+        // Checkboxes, toggle only the clicked one
+        clickedElement.checked = !clickedElement.checked
+      } else {
+        // Radio button, uncheck everything and check the clicked one
+        forEach(allElements, element => { element.checked = false })
+        clickedElement.checked = true
+      }
+      this.choices = map(allElements, e => e.checked)
+    },
+    optionId (index) {
+      return `poll${this.poll.id}-${index}`
+    },
+    vote () {
+      if (this.choiceIndices.length === 0) return
+      this.loading = true
+      this.$store.dispatch(
+        'votePoll',
+        { id: this.statusId, pollId: this.poll.id, choices: this.choiceIndices }
+      ).then(poll => {
+        this.loading = false
+      })
+    }
+  }
+}