Add client support for nav item updates

packages/client/src/components/app/Layout.svelte

@@ -2,9 +2,8 @@
   import { getContext, setContext } from "svelte"
   import { writable } from "svelte/store"
   import { Heading, Icon, clickOutside } from "@budibase/bbui"
-  import { FieldTypes } from "constants"
   import { Constants } from "@budibase/frontend-core"
-  import active from "svelte-spa-router/active"
+  import NavItem from "./NavItem.svelte"
 
   const sdk = getContext("sdk")
   const {
@@ -18,6 +17,7 @@
   } = sdk
   const component = getContext("component")
   const context = getContext("context")
+  const navStateStore = writable({})
 
   // Legacy props which must remain unchanged for backwards compatibility
   export let title
@@ -65,7 +65,7 @@
   })
   setContext("layout", store)
 
-  $: validLinks = getValidLinks(links, $roleStore)
+  $: enrichedNavItems = enrichNavItems(links, $roleStore)
   $: typeClass = NavigationClasses[navigation] || NavigationClasses.None
   $: navWidthClass = WidthClasses[navWidth || width] || WidthClasses.Large
   $: pageWidthClass = WidthClasses[pageWidth || width] || WidthClasses.Large
@@ -103,26 +103,50 @@
     }
   }
 
-  const getValidLinks = (allLinks, userRoleHierarchy) => {
-    // Strip links missing required info
-    let validLinks = (allLinks || []).filter(link => link.text)
+  const enrichNavItem = navItem => {
+    const internalLink = isInternal(navItem.url)
+    return {
+      ...navItem,
+      internalLink,
+      url: internalLink ? navItem.url : ensureExternal(navItem.url),
+    }
+  }
+
+  const enrichNavItems = (navItems, userRoleHierarchy) => {
+    if (!navItems?.length) {
+      return []
+    }
+    return navItems
+      .filter(navitem => {
+        // Strip nav items without text
+        if (!navitem.text) {
+          return false
+        }
+
         // Filter to only links allowed by the current role
-    return validLinks.filter(link => {
-      const role = link.roleId || Constants.Roles.BASIC
+        const role = navitem.roleId || Constants.Roles.BASIC
         return userRoleHierarchy?.find(roleId => roleId === role)
       })
+      .map(navItem => {
+        const enrichedNavItem = enrichNavItem(navItem)
+        if (navItem.type === "sublinks" && navItem.subLinks?.length) {
+          enrichedNavItem.subLinks = navItem.subLinks
+            .filter(subLink => subLink.text)
+            .map(enrichNavItem)
+        }
+        return enrichedNavItem
+      })
   }
 
   const isInternal = url => {
-    return url.startsWith("/")
+    return url?.startsWith("/")
   }
 
   const ensureExternal = url => {
-    return !url.startsWith("http") ? `http://${url}` : url
+    if (!url?.length) {
+      return url
     }
-
-  const close = () => {
-    mobileOpen = false
+    return !url.startsWith("http") ? `http://${url}` : url
   }
 
   const navigateToPortal = () => {
@@ -197,7 +221,7 @@
         >
           <div class="nav nav--{typeClass} size--{navWidthClass}">
             <div class="nav-header">
-              {#if validLinks?.length}
+              {#if enrichedNavItems.length}
                 <div class="burger">
                   <Icon
                     hoverable
@@ -246,28 +270,19 @@
               class:visible={mobileOpen}
               on:click={() => (mobileOpen = false)}
             />
-            {#if validLinks?.length}
+            {#if enrichedNavItems.length}
               <div class="links" class:visible={mobileOpen}>
-                {#each validLinks as { text, url }}
-                  {#if isInternal(url)}
-                    <a
-                      class={FieldTypes.LINK}
-                      href={url}
-                      use:linkable
-                      on:click={close}
-                      use:active={url}
-                    >
-                      {text}
-                    </a>
-                  {:else}
-                    <a
-                      class={FieldTypes.LINK}
-                      href={ensureExternal(url)}
-                      on:click={close}
-                    >
-                      {text}
-                    </a>
-                  {/if}
+                {#each enrichedNavItems as navItem}
+                  <NavItem
+                    type={navItem.type}
+                    text={navItem.text}
+                    url={navItem.url}
+                    subLinks={navItem.subLinks}
+                    internalLink={navItem.internalLink}
+                    on:clickLink={() => (mobileOpen = false)}
+                    leftNav={navigation === "Left"}
+                    {navStateStore}
+                  />
                 {/each}
                 <div class="close">
                   <Icon
@@ -505,21 +520,6 @@
     gap: var(--spacing-xl);
     margin-top: var(--spacing-xl);
   }
-  .link {
-    opacity: 0.75;
-    color: var(--navTextColor);
-    font-size: var(--spectrum-global-dimension-font-size-200);
-    font-weight: 600;
-    transition: color 130ms ease-out;
-  }
-  .link.active {
-    opacity: 1;
-  }
-  .link:hover {
-    opacity: 1;
-    text-decoration: underline;
-    text-underline-position: under;
-  }
   .close {
     display: none;
     position: absolute;

packages/client/src/components/app/NavItem.svelte

@@ -0,0 +1,164 @@
+<script>
+  import { createEventDispatcher, getContext } from "svelte"
+  import active from "svelte-spa-router/active"
+  import { Icon } from "@budibase/bbui"
+
+  export let type
+  export let url
+  export let text
+  export let subLinks
+  export let internalLink
+  export let leftNav = false
+  export let navStateStore
+
+  const dispatch = createEventDispatcher()
+  const sdk = getContext("sdk")
+  const { linkable } = sdk
+
+  $: expanded = !!$navStateStore[text]
+  $: icon = !leftNav || expanded ? "ChevronDown" : "ChevronRight"
+
+  const onClickLink = () => {
+    dispatch("clickLink")
+  }
+
+  const onClickDropdown = () => {
+    if (!leftNav) {
+      return
+    }
+    navStateStore.update(state => ({
+      ...state,
+      [text]: !state[text],
+    }))
+  }
+</script>
+
+{#if !type || type === "link"}
+  {#if internalLink}
+    <!--
+      It's stupid that we have to add class:active={false} here, but if we don't
+      then svelte will strip out the CSS selector and active links won't be
+      styled
+    -->
+    <a
+      href={url}
+      on:click={onClickLink}
+      use:active={url}
+      use:linkable
+      class:active={false}
+    >
+      {text}
+    </a>
+  {:else}
+    <a href={url} on:click={onClickLink}>
+      {text}
+    </a>
+  {/if}
+{:else}
+  <!-- svelte-ignore a11y-no-static-element-interactions -->
+  <!-- svelte-ignore a11y-click-events-have-key-events -->
+  <div class="dropdown" class:left={leftNav} class:expanded>
+    <div class="text" on:click={onClickDropdown}>
+      {text}
+      <Icon name={icon} />
+    </div>
+    <div class="sublinks-wrapper">
+      <div class="sublinks">
+        {#each subLinks as subLink}
+          {#if subLink.internalLink}
+            <a
+              href={subLink.url}
+              on:click={onClickLink}
+              use:active={subLink.url}
+              use:linkable
+            >
+              {subLink.text}
+            </a>
+          {:else}
+            <a href={subLink.url} on:click={onClickLink}>
+              {subLink.text}
+            </a>
+          {/if}
+        {/each}
+      </div>
+    </div>
+  </div>
+{/if}
+
+<style>
+  /* Generic styles */
+  a,
+  .text {
+    opacity: 0.75;
+    color: var(--navTextColor);
+    font-size: var(--spectrum-global-dimension-font-size-200);
+    transition: opacity 130ms ease-out;
+    font-weight: 600;
+  }
+  a.active {
+    opacity: 1;
+  }
+  a:hover,
+  .dropdown:not(.left.expanded):hover .text,
+  .text:hover {
+    cursor: pointer;
+    opacity: 1;
+  }
+
+  /* Top dropdowns */
+  .dropdown {
+    position: relative;
+  }
+  .text {
+    display: flex;
+    flex-direction: row;
+    justify-content: flex-start;
+    align-items: center;
+    gap: var(--spacing-xs);
+    user-select: none;
+  }
+  .sublinks-wrapper {
+    position: absolute;
+    top: 100%;
+    display: none;
+    padding-top: var(--spacing-s);
+  }
+  .dropdown:hover .sublinks-wrapper {
+    display: block;
+  }
+  .sublinks {
+    display: flex;
+    flex-direction: column;
+    justify-content: stretch;
+    align-items: flex-start;
+    background: var(--spectrum-global-color-gray-50);
+    border-radius: 6px;
+    border: 1px solid var(--spectrum-global-color-gray-300);
+    min-width: 150px;
+    max-width: 250px;
+    padding: 10px 0;
+    overflow: hidden;
+  }
+  .sublinks a {
+    padding: 6px var(--spacing-l);
+    font-weight: 400;
+    white-space: nowrap;
+    overflow: hidden;
+    text-overflow: ellipsis;
+    width: 100%;
+  }
+
+  /* Left dropdowns */
+  .dropdown.left .sublinks-wrapper {
+    display: none;
+  }
+  .dropdown.left,
+  .dropdown.left.expanded .sublinks-wrapper,
+  .dropdown.dropdown.left.expanded .sublinks {
+    display: contents;
+  }
+  .dropdown.left a {
+    padding-top: 0;
+    padding-bottom: 0;
+  }
+</style>