From 30f97237f54f1b3d88c46f1284938857bba87443 Mon Sep 17 00:00:00 2001
From: Wlad <wlad.meixner@protonmail.com>
Date: Sat, 2 Sep 2017 13:35:41 +0200
Subject: [PATCH] Added async image loading with not found and loading
 indication

---
 src/components/UIComponents/OxyImage.vue   | 77 ++++++++++++++++++++++
 src/components/UIComponents/OxyProduct.vue |  5 +-
 src/components/UIComponents/OxySpinner.vue | 14 ++--
 static/img/image_not_found.svg             |  1 +
 4 files changed, 90 insertions(+), 7 deletions(-)
 create mode 100644 src/components/UIComponents/OxyImage.vue
 create mode 100644 static/img/image_not_found.svg

diff --git a/src/components/UIComponents/OxyImage.vue b/src/components/UIComponents/OxyImage.vue
new file mode 100644
index 0000000..4286d04
--- /dev/null
+++ b/src/components/UIComponents/OxyImage.vue
@@ -0,0 +1,77 @@
+// OxyImagge helps to load images asynch 
+// adds loading indicator 
+// if laod fails also adds a image not found placeholder
+<template>
+  <div class="oxy-image-wrapper">
+    <oxy-spinner v-if="!isLoaded"></oxy-spinner>
+    <template :ref="oxyImageHolder" v-if="!notFound">
+      <img :src="src" />
+    </template>
+    <template v-else>
+      <img :src="notFoundImage" />
+    </template>
+  </div>
+</template>
+
+<script>
+import OxySpinner from './OxySpinner'
+
+export default {
+  components: {
+    OxySpinner
+  },
+  props: {
+    notFoundImage: {
+      type: String,
+      required: false,
+      default: 'static/img/image_not_found.svg'
+    },
+    src: {
+      type: String,
+      required: false,
+      default: 'static/img/image_not_found.svg'
+    }
+  },
+
+  mounted () {
+    this.image = new Image()
+    this.image.onload = this.loadCompleted
+    this.image.onerror = this.loadError
+    this.image.src = this.src
+  },
+
+  data () {
+    return {
+      isLoaded: false,
+      notFound: true,
+      image: null
+    }
+  },
+
+  methods: {
+    loadError: function (event) {
+      console.warn('Failed to laod ressource', event)
+      this.isLoaded = true
+      this.notFound = true
+    },
+    loadCompleted: function (success) {
+      console.log('Image loaded', success, this)
+      this.isLoaded = true
+      this.notFound = false
+    }
+  }
+}
+</script>
+
+<style>
+  .oxy-image-wrapper {
+    display: inline-block;
+    text-align: center;
+  }
+
+  .oxy-image-wrapper img {
+    display: block;
+    max-height: 100%;
+    max-width: 100%;
+  }
+</style>
diff --git a/src/components/UIComponents/OxyProduct.vue b/src/components/UIComponents/OxyProduct.vue
index e77655f..d120412 100644
--- a/src/components/UIComponents/OxyProduct.vue
+++ b/src/components/UIComponents/OxyProduct.vue
@@ -1,7 +1,7 @@
 <template>
   <div class="item product">
     <p class="product-image-wrapper">
-      <img class="product-thumb" :src="product.thumb">
+      <oxy-image class="product-thumb" :src="product.thumb"></oxy-image>
     </p>
     <p class="product-name">{{product.title}}</p>
     <oxy-rating :v-if="product.rating" :rating="product.rating"></oxy-rating>
@@ -13,9 +13,12 @@
 </template>
 
 <script>
+import OxyImage from '../UIComponents/OxyImage'
 import OxyRating from './OxyRating.vue'
+
 export default {
   components: {
+    OxyImage,
     OxyRating
   },
   props: {
diff --git a/src/components/UIComponents/OxySpinner.vue b/src/components/UIComponents/OxySpinner.vue
index c90d1f6..55c775b 100644
--- a/src/components/UIComponents/OxySpinner.vue
+++ b/src/components/UIComponents/OxySpinner.vue
@@ -1,6 +1,6 @@
 // this components is based on css styles by lukehaas https://github.com/lukehaas
 <template>
-  <div class="loader" :class="{isActive : play}">Loading...</div>
+  <div class="loader" :class="{play : isActive}">Loading...</div>
 </template>
 
 <script>
@@ -15,13 +15,15 @@ export default {
       this.isActive = false
     },
     continue () {
-        this.isActive
+      this.isActive = true
     }
   }
 }
 </script>
 
-<style>
+<style lang="scss">
+$spinner-color: rgba(0, 0, 0, 0.1);
+
 .loader,
 .loader:after {
   border-radius: 50%;
@@ -33,9 +35,9 @@ export default {
   font-size: 10px;
   position: relative;
   text-indent: -9999em;
-  border-top: 1.1em solid rgba(255, 255, 255, 0.2);
-  border-right: 1.1em solid rgba(255, 255, 255, 0.2);
-  border-bottom: 1.1em solid rgba(255, 255, 255, 0.2);
+  border-top: 1.1em solid $spinner-color;
+  border-right: 1.1em solid $spinner-color;
+  border-bottom: 1.1em solid $spinner-color;
   border-left: 1.1em solid #ffffff;
   -webkit-transform: translateZ(0);
   -ms-transform: translateZ(0);
diff --git a/static/img/image_not_found.svg b/static/img/image_not_found.svg
new file mode 100644
index 0000000..887cb61
--- /dev/null
+++ b/static/img/image_not_found.svg
@@ -0,0 +1 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 512 512"><title>image_not_found</title><g id="Layer_2" data-name="Layer 2"><g id="Layer_1-2" data-name="Layer 1"><rect width="512" height="512" style="fill:none"/><text transform="translate(150.83 191.81)" style="font-size:76.77847290039062px;fill:#ededed;font-family:Helvetica-Bold, Helvetica;font-weight:700">IMAGE<tspan x="0" y="92.13">NOT</tspan><tspan x="0" y="184.27">FOUND</tspan></text><rect x="106.84" y="133.53" width="13.63" height="248.5" style="fill:#ededed"/></g></g></svg>
\ No newline at end of file