src/components/Message.vue

   1 <template>
   2   <article v-if="show" class="message" :class="message.style">
   3     <div v-if="message.title || message.icon" class="message-header">
   4       <p>
   5         <i v-if="message.icon" :class="`fa-fw ${message.icon}`"></i>
   6         {{ message.title }}
   7       </p>
   8     </div>
   9     <div
  10       v-if="message.content"
  11       class="message-body"
  12       v-html="message.content"
  13     ></div>
  14   </article>
  15 </template>
  16
  17 <script>
  18 export default {
  19   name: "Message",
  20   props: {
  21     item: Object,
  22   },
  23   data: function () {
  24     return {
  25       message: {},
  26     };
  27   },
  28   created: async function () {
  29     // Look for a new message if an endpoint is provided.
  30     this.message = Object.assign({}, this.item);
  31     await this.getMessage();
  32   },
  33   computed: {
  34     show: function () {
  35       return this.message.title || this.message.content;
  36     },
  37   },
  38   watch: {
  39     item: function (item) {
  40       this.message = Object.assign({}, item);
  41     },
  42   },
  43   methods: {
  44     getMessage: async function () {
  45       if (!this.item) {
  46         return;
  47       }
  48       if (this.item.url) {
  49         let fetchedMessage = await this.downloadMessage(this.item.url);
  50         if (this.item.mapping) {
  51           fetchedMessage = this.mapRemoteMessage(fetchedMessage);
  52         }
  53
  54         // keep the original config value if no value is provided by the endpoint
  55         const message = this.message;
  56         for (const prop of ["title", "style", "content", "icon"]) {
  57           if (prop in fetchedMessage && fetchedMessage[prop] !== null) {
  58             message[prop] = fetchedMessage[prop];
  59           }
  60         }
  61         this.message = { ...message }; // Force computed property to re-evaluate
  62       }
  63
  64       if (this.item.refreshInterval) {
  65         setTimeout(this.getMessage, this.item.refreshInterval);
  66       }
  67     },
  68
  69     downloadMessage: function (url) {
  70       return fetch(url).then(function (response) {
  71         if (response.status != 200) {
  72           return;
  73         }
  74         return response.json();
  75       });
  76     },
  77
  78     mapRemoteMessage: function (message) {
  79       let mapped = {};
  80       // map property from message into mapped according to mapping config (only if field has a value):
  81       for (const prop in this.item.mapping)
  82         if (message[this.item.mapping[prop]])
  83           mapped[prop] = message[this.item.mapping[prop]];
  84       return mapped;
  85     },
  86   },
  87 };
  88 </script>