Support for entities with children on the frontend

platypush/backend/http/webapp/src/components/panels/Entities/Device.vue

@@ -0,0 +1,37 @@
+<template>
+  <div class="entity device-container">
+    <div class="head">
+      <div class="col-1 icon">
+        <EntityIcon
+          :icon="value.meta?.icon || {}"
+          :loading="loading"
+          :error="error" />
+      </div>
+
+      <div class="col-12 label">
+        <div class="name" v-text="value.name" />
+      </div>
+    </div>
+  </div>
+</template>
+
+<script>
+import EntityMixin from "./EntityMixin"
+import EntityIcon from "./EntityIcon"
+
+export default {
+  name: 'Device',
+  components: {EntityIcon},
+  mixins: [EntityMixin],
+}
+</script>
+
+<style lang="scss" scoped>
+@import "common";
+
+.device-container {
+  .icon {
+    margin-right: 1em;
+  }
+}
+</style>

platypush/backend/http/webapp/src/components/panels/Entities/Entity.vue

@@ -1,5 +1,9 @@
 <template>
-  <div class="row item entity-container" :class="{blink: justUpdated}">
+  <div class="entity-container-wrapper"
+      :class="{'with-children': hasChildren, collapsed: isCollapsed}">
+    <div class="row item entity-container"
+        :class="{blink: justUpdated, 'with-children': hasChildren, collapsed: isCollapsed}">
+      <div class="adjuster" :class="{'col-12': !hasChildren, 'col-11': hasChildren}">
         <component :is="component"
           :value="value"
           :loading="loading"
@@ -8,6 +12,23 @@
           @loading="$emit('loading', $event)"
         />
       </div>
+
+      <div class="col-1 collapse-toggler" @click.stop="collapsed = !collapsed" v-if="hasChildren">
+        <i class="fas"
+          :class="{'fa-chevron-down': isCollapsed, 'fa-chevron-up': !isCollapsed}" />
+      </div>
+    </div>
+
+    <div class="children" v-if="!isCollapsed">
+      <div class="child" v-for="entity in computedChildren" :key="entity.id">
+        <Entity
+         :value="entity"
+         :loading="loading"
+         :level="level + 1"
+         @input="$emit('input', entity)" />
+      </div>
+    </div>
+  </div>
 </template>
 
 <script>
@@ -22,10 +43,28 @@ export default {
   data() {
     return {
       component: null,
+      collapsed: true,
       justUpdated: false,
     }
   },
 
+  computed: {
+    computedChildren() {
+      return Object.values(this.children || {}).filter((child) => child)
+    },
+
+    hasChildren() {
+      return !!this.computedChildren.length
+    },
+
+    isCollapsed() {
+      if (!this.hasChildren)
+        return true
+
+      return this.collapsed
+    },
+  },
+
   methods: {
     valuesEqual(a, b) {
       a = {...a}
@@ -68,10 +107,47 @@ export default {
 <style lang="scss" scoped>
 @import "common";
 
+.entity-container-wrapper {
+  &.with-children:not(.collapsed) {
+    box-shadow: 0 3px 4px 0 $default-shadow-color;
+  }
+}
+
 .entity-container {
   width: 100%;
+  display: flex;
+  align-items: center;
   position: relative;
   padding: 0 !important;
+  border-bottom: $default-border-3;
+
+  &.with-children:not(.collapsed) {
+    background: $selected-bg;
+    font-weight: bold;
+    box-shadow: 0 0 3px 2px $default-shadow-color;
+  }
+
+  &:hover {
+    background: $hover-bg;
+  }
+
+  .collapse-toggler {
+    display: flex;
+    justify-content: center;
+    align-items: center;
+    flex: 1;
+    min-height: 3em;
+    margin-left: 0;
+    cursor: pointer;
+
+    &:hover {
+      color: $default-hover-fg;
+    }
+  }
+
+  .adjuster {
+    cursor: pointer;
+  }
 }
 
 .blink {

platypush/backend/http/webapp/src/components/panels/Entities/EntityMixin.vue

@@ -20,6 +20,16 @@ export default {
       type: Object,
       required: true,
     },
+
+    children: {
+      type: Object,
+      default: () => {},
+    },
+
+    level: {
+      type: Number,
+      default: 0,
+    },
   },
 
   data() {

platypush/backend/http/webapp/src/components/panels/Entities/Index.vue

@@ -49,10 +49,12 @@
                   v-for="entity in group.entities" :key="entity.id">
                 <Entity
                   :value="entity"
-                  @input="onEntityInput"
+                  :children="childrenByParentId(entity.id)"
+                  @input="onEntityInput(entity)"
                   :error="!!errorEntities[entity.id]"
                   :loading="!!loadingEntities[entity.id]"
                   @loading="loadingEntities[entity.id] = $event"
+                  v-if="!entity.parent_id"
                 />
               </div>
             </div>
@@ -135,11 +137,14 @@ export default {
     },
 
     displayGroups() {
-      return Object.entries(this.entityGroups[this.selector.grouping]).filter(
+      return Object.entries(this.entityGroups[this.selector.grouping]).
+        filter(
           (entry) => entry[1].filter(
-          (e) => !!this.selector.selectedEntities[e.id]
+            (e) =>
+              !!this.selector.selectedEntities[e.id] && e.parent_id == null
           ).length > 0
-      ).sort((a, b) => a[0].localeCompare(b[0])).map(
+        ).
+        map(
           ([grouping, entities]) => {
             return {
               name: grouping,
@@ -148,13 +153,16 @@ export default {
               ),
             }
           }
-      )
+        ).
+        sort((a, b) => a.name.localeCompare(b.name))
     },
   },
 
   methods: {
     groupEntities(attr) {
-      return Object.values(this.entities).reduce((obj, entity) => {
+      return Object.values(this.entities).
+        filter((entity) => entity.parent_id == null).
+        reduce((obj, entity) => {
           const entities = obj[entity[attr]] || {}
           entities[entity.id] = entity
 
@@ -223,6 +231,15 @@ export default {
       }
     },
 
+    childrenByParentId(parentId) {
+      return Object.values(this.entities).
+        filter((entity) => entity.parent_id === parentId).
+        reduce((obj, entity) => {
+          obj[entity.id] = entity
+          return obj
+        }, {})
+    },
+
     clearEntityTimeouts(entityId) {
       if (this.errorEntities[entityId])
         delete this.errorEntities[entityId]

platypush/backend/http/webapp/src/components/panels/Entities/Sensor.vue

@@ -1,5 +1,5 @@
 <template>
-  <div class="entity sensor-container" :class="{hidden: value.value == null}">
+  <div class="entity sensor-container">
     <div class="head">
       <div class="col-1 icon">
         <EntityIcon