[Extensions UI] Install extensions deps from the UI.

- Added `Install` button
- Added interactive output panel

platypush/backend/http/webapp/src/components/elements/CopyButton.vue

@@ -45,5 +45,6 @@ export default {
   padding: 0.5em;
   font-size: 1.5em;
   cursor: pointer;
+  z-index: 1;
 }
 </style>

platypush/backend/http/webapp/src/components/panels/Extensions/Install.vue

@@ -1,9 +1,43 @@
 <template>
   <div class="install-container">
-    <div class="install-cmd-container">
+    <section class="top">
+      <header>
+        <h2>Dependencies</h2>
+      </header>
+
+      <div class="body">
+        <div class="container install-cmd-container">
           <CopyButton :text="installCmd" />
           <pre><code v-html="highlightedInstallCmd" /></pre>
         </div>
+
+        <div class="buttons install-btn" v-if="installCmd?.length">
+          <button type="button"
+                  class="btn btn-default"
+                  :disabled="installRunning"
+                  @click="installExtension">
+            <i class="fas fa-download" /> Install
+          </button>
+        </div>
+      </div>
+    </section>
+
+    <section class="bottom" v-if="installRunning || installOutput">
+      <header>
+        <h2>Output</h2>
+      </header>
+
+      <div class="body">
+        <div class="container install-output" ref="installOutput">
+          <CopyButton :text="installOutput" />
+          <pre><code v-text="installOutput" /><div
+                     class="loading-container"
+                     v-if="installRunning">
+            <Loading />
+          </div></pre>
+        </div>
+      </div>
+    </section>
   </div>
 </template>
 
@@ -12,14 +46,18 @@ import 'highlight.js/lib/common'
 import 'highlight.js/styles/stackoverflow-dark.min.css'
 import hljs from "highlight.js"
 import CopyButton from "@/components/elements/CopyButton"
+import Loading from "@/components/Loading"
 import Utils from "@/Utils"
 
 export default {
   name: "Install",
   mixins: [Utils],
+  emit: ['install-start', 'install-end'],
   components: {
     CopyButton,
+    Loading,
   },
+
   props: {
     extension: {
       type: Object,
@@ -27,6 +65,14 @@ export default {
     },
   },
 
+  data() {
+    return {
+      installRunning: false,
+      installOutput: null,
+      pendingCommands: 0,
+    }
+  },
+
   computed: {
     installCmd() {
       const cmd = this.extension.deps.install_cmd.join('\n').trim()
@@ -47,29 +93,142 @@ export default {
       )
     },
   },
+
+  methods: {
+    wsProcess(path) {
+      try {
+        const protocol = window.location.protocol === 'https:' ? 'wss' : 'ws'
+        const url = `${protocol}://${location.host}${path}`
+        const ws = new WebSocket(url)
+
+        ws.onmessage = this.onMessage
+        ws.onerror = this.onError
+        ws.onclose = this.onClose
+      } catch (err) {
+        console.error('Websocket initialization error')  // TODO notify
+        console.error(err)
+        return
+      }
+    },
+
+    onMessage(msg) {
+      if (!this.installOutput)
+        this.installOutput = ''
+
+      this.installOutput += msg.data
+    },
+
+    onClose() {
+      this.installRunning = false
+      this.$emit('install-end', this.extension)
+    },
+
+    onError(error) {
+      console.error('Websocket error')  // TODO notify
+      console.error(error)
+    },
+
+    installExtension() {
+      this.installRunning = true
+      this.installOutput = ''
+      this.$emit('install-start', this.extension)
+
+      const cmd = (this.extension.deps.install_cmd || []).join(';\n')
+      this.request('shell.exec', {
+        cmd: cmd,
+        ws: true,
+      }).then((output) => {
+        this.wsProcess(output.ws_path)
+      }).catch((err) => {
+        console.error(err)  // TODO notify
+      })
+    },
+  },
+
+  mounted() {
+    this.$watch('installOutput', () => {
+      this.$nextTick(() => {
+        this.$refs.installOutput.focus()
+        this.$refs.installOutput.scrollTop = this.$refs.installOutput.scrollHeight
+      })
+    })
+  },
 }
 </script>
 
 <style lang="scss" scoped>
 @import "common.scss";
 
+$header-height: 3.5em;
+
 .install-container {
   width: 100%;
   height: 100%;
   display: flex;
   flex-direction: column;
 
-  .install-cmd-container {
+  section {
+    &.top {
+      height: 33.3333% !important;
+    }
+
+    &.bottom {
+      height: 66.6666% !important;
+    }
+
+    header {
+      height: $header-height;
+      padding-left: 0.5em;
+      border-top: 1px solid $border-color-1;
+      border-bottom: 1px solid $border-color-1;
+    }
+
+    .body {
+      height: calc(100% - #{$header-height});
+      display: flex;
+      flex-direction: column;
+      padding: 1em;
+    }
+
+    h2 {
+      font-size: 1.3em;
+      opacity: 0.9;
+    }
+  }
+
+  .container {
     width: 100%;
     height: 100%;
     position: relative;
     display: flex;
     flex-direction: column;
-    flex-grow: 1;
   }
 
   pre {
-    height: 50%;
+    height: 100%;
+    position: relative;
+    border-radius: 1em;
+  }
+
+  .install-btn {
+    width: 100%;
+    margin-top: 1em;
+    display: flex;
+    justify-content: right;
+
+    button {
+      border-radius: 0.5em;
+      margin-right: 0.5em;
+    }
+  }
+
+  .loading-container {
+    width: 100%;
+    position: relative;
+
+    :deep(.loading) {
+      background: none;
+    }
   }
 }
 </style>

platypush/backend/http/webapp/src/components/panels/Extensions/common.scss

@@ -3,6 +3,7 @@ pre {
   margin: 0;
   background: $code-dark-bg;
   color: $code-dark-fg;
+  font-size: 0.9em;
   padding: 0.5em;
   overflow: auto;
 }

platypush/backend/http/webapp/src/style/themes/light.scss

@@ -166,7 +166,7 @@ $scrollbar-thumb-bg: #a5a2a2 !default;
 $row-shadow: 0 0 1px 0.5px #cfcfcf !default;
 
 //// Code blocks
-$code-dark-bg: #090909 !default;
-$code-dark-fg: #f0f0f0 !default;
+$code-dark-bg: rgb(11, 11, 13) !default;
+$code-dark-fg: rgb(243, 243, 250) !default;
 $code-light-bg: #f2f0e9 !default;
 $code-light-fg: #090909 !default;

platypush/backend/http/webapp/vue.config.js

@@ -36,6 +36,7 @@ module.exports = {
     proxy: {
       '^/ws/events': wsProxy,
       '^/ws/requests': wsProxy,
+      '^/ws/shell': wsProxy,
       '^/execute': httpProxy,
       '^/auth': httpProxy,
       '^/camera/': httpProxy,