Add drag and drop for space icons

src/app/components/MenuOtherSpaces.svelte

@@ -6,10 +6,73 @@
   }
 
   const {urls}: Props = $props()
+
+  const reorderUrls = (sourceUrl: string, targetUrl: string, currentUrls: string[]) => {
+    if (sourceUrl === targetUrl) {
+      return currentUrls
+    }
+
+    const sourceIndex = currentUrls.indexOf(sourceUrl)
+    const targetIndex = currentUrls.indexOf(targetUrl)
+
+    if (sourceIndex === -1 || targetIndex === -1) {
+      return currentUrls
+    }
+
+    const nextUrls = currentUrls.filter(url => url !== sourceUrl)
+
+    nextUrls.splice(targetIndex, 0, sourceUrl)
+
+    return nextUrls
+  }
+
+  const moveDraggedUrl = (targetUrl: string) => {
+    if (!draggedUrl) {
+      return
+    }
+
+    orderedUrls = reorderUrls(draggedUrl, targetUrl, orderedUrls)
+  }
+
+  const onDragStart = (e: DragEvent, url: string) => {
+    draggedUrl = url
+
+    if (e.dataTransfer) {
+      e.dataTransfer.effectAllowed = "move"
+      e.dataTransfer.setData("text/plain", url)
+    }
+  }
+
+  const onDragOver = (e: DragEvent, targetUrl: string) => {
+    e.preventDefault()
+    moveDraggedUrl(targetUrl)
+  }
+
+  const onDrop = (e: DragEvent, targetUrl: string) => {
+    e.preventDefault()
+    moveDraggedUrl(targetUrl)
+    draggedUrl = undefined
+  }
+
+  const onDragEnd = () => {
+    draggedUrl = undefined
+  }
+
+  let orderedUrls = $state([...urls])
+  let draggedUrl = $state<string | undefined>()
 </script>
 
-<div class="column menu gap-2">
-  {#each urls as url (url)}
-    <MenuSpacesItem {url} />
+<div class="column menu gap-2 p-3" role="list">
+  {#each orderedUrls as url (url)}
+    <div
+      class:opacity-60={draggedUrl === url}
+      draggable="true"
+      role="listitem"
+      ondragstart={e => onDragStart(e, url)}
+      ondragover={e => onDragOver(e, url)}
+      ondrop={e => onDrop(e, url)}
+      ondragend={onDragEnd}>
+      <MenuSpacesItem {url} />
+    </div>
   {/each}
 </div>

src/app/components/PrimaryNav.svelte

@@ -1,7 +1,6 @@
 <script lang="ts">
   import type {Snippet} from "svelte"
   import {goto} from "$app/navigation"
-  import {splitAt} from "@welshman/lib"
   import {userProfile, shouldUnwrap} from "@welshman/app"
   import Widget from "@assets/icons/widget.svg?dataurl"
   import Compass from "@assets/icons/compass.svg?dataurl"
@@ -28,7 +27,7 @@
 
   const {children}: Props = $props()
 
-  const showOtherSpacesMenu = () => pushModal(MenuOtherSpaces, {urls: secondarySpaceUrls})
+  const showOtherSpacesMenu = () => pushModal(MenuOtherSpaces, {urls: $userSpaceUrls})
 
   const showSettingsMenu = () => pushModal(MenuSettings)
 
@@ -39,9 +38,9 @@
   const itemHeight = 56
   const navPadding = 8 * itemHeight
   const itemLimit = $derived((windowHeight - navPadding) / itemHeight)
-  const [primarySpaceUrls, secondarySpaceUrls] = $derived(splitAt(itemLimit, $userSpaceUrls))
+  const primarySpaceUrls = $derived($userSpaceUrls.slice(0, itemLimit))
   const anySpaceNotifications = $derived($userSpaceUrls.some(p => $notifications.has(p)))
-  const otherSpaceNotifications = $derived(secondarySpaceUrls.some(p => $notifications.has(p)))
+  const otherSpaceNotifications = $derived($userSpaceUrls.some(p => $notifications.has(p)))
 </script>
 
 <svelte:window bind:innerHeight={windowHeight} />
@@ -60,15 +59,13 @@
         {#each primarySpaceUrls as url (url)}
           <PrimaryNavItemSpace {url} />
         {/each}
-        {#if secondarySpaceUrls.length > 0}
-          <PrimaryNavItem
-            title="Other Spaces"
-            class="tooltip-right"
-            onclick={showOtherSpacesMenu}
-            notification={otherSpaceNotifications}>
-            <ImageIcon alt="Other Spaces" src={Widget} size={8} />
-          </PrimaryNavItem>
-        {/if}
+        <PrimaryNavItem
+          title="All Spaces"
+          class="tooltip-right"
+          onclick={showOtherSpacesMenu}
+          notification={otherSpaceNotifications}>
+          <ImageIcon alt="All Spaces" src={Widget} size={8} />
+        </PrimaryNavItem>
         <PrimaryNavItem title="Add a Space" href="/discover" class="tooltip-right">
           <ImageIcon alt="Add a Space" src={Compass} size={8} />
         </PrimaryNavItem>

src/routes/spaces/+page.svelte

@@ -12,6 +12,83 @@
   import {pushModal} from "@app/util/modal"
 
   const addSpace = () => pushModal(SpaceAdd)
+
+  const reconcileUrls = (currentUrls: string[], nextUrls: string[]) => {
+    const mergedUrls = currentUrls.filter(url => nextUrls.includes(url))
+
+    for (const url of nextUrls) {
+      if (!mergedUrls.includes(url)) {
+        mergedUrls.push(url)
+      }
+    }
+
+    return mergedUrls
+  }
+
+  const isSameOrder = (a: string[], b: string[]) =>
+    a.length === b.length && a.every((url, index) => url === b[index])
+
+  const reorderUrls = (sourceUrl: string, targetUrl: string, currentUrls: string[]) => {
+    if (sourceUrl === targetUrl) {
+      return currentUrls
+    }
+
+    const sourceIndex = currentUrls.indexOf(sourceUrl)
+    const targetIndex = currentUrls.indexOf(targetUrl)
+
+    if (sourceIndex === -1 || targetIndex === -1) {
+      return currentUrls
+    }
+
+    const nextUrls = currentUrls.filter(url => url !== sourceUrl)
+
+    nextUrls.splice(targetIndex, 0, sourceUrl)
+
+    return nextUrls
+  }
+
+  const moveDraggedUrl = (targetUrl: string) => {
+    if (!draggedUrl) {
+      return
+    }
+
+    orderedSpaceUrls = reorderUrls(draggedUrl, targetUrl, orderedSpaceUrls)
+  }
+
+  const onDragStart = (e: DragEvent, url: string) => {
+    draggedUrl = url
+
+    if (e.dataTransfer) {
+      e.dataTransfer.effectAllowed = "move"
+      e.dataTransfer.setData("text/plain", url)
+    }
+  }
+
+  const onDragOver = (e: DragEvent, targetUrl: string) => {
+    e.preventDefault()
+    moveDraggedUrl(targetUrl)
+  }
+
+  const onDrop = (e: DragEvent, targetUrl: string) => {
+    e.preventDefault()
+    moveDraggedUrl(targetUrl)
+    draggedUrl = undefined
+  }
+
+  const onDragEnd = () => {
+    draggedUrl = undefined
+  }
+
+  $effect(() => {
+    const nextUrls = reconcileUrls(orderedSpaceUrls, $userSpaceUrls)
+
+    if (!isSameOrder(nextUrls, orderedSpaceUrls)) {
+      orderedSpaceUrls = nextUrls
+    }
+  })
+
+  let orderedSpaceUrls = $state<string[]>([])
+  let draggedUrl = $state<string | undefined>()
 </script>
 
 <Page class="cw-full">
@@ -33,7 +110,7 @@
       {/if}
     {/snippet}
   </PageBar>
-  <PageContent class="cw-full flex flex-col gap-2 p-2 pt-4">
+  <PageContent class="cw-full flex flex-col gap-2 p-4 pt-6">
     {#each PLATFORM_RELAYS as url (url)}
       <MenuSpacesItem {url} />
     {:else}
@@ -43,8 +120,17 @@
           Loading your spaces...
         </div>
       {:then}
-        {#each $userSpaceUrls as url (url)}
-          <MenuSpacesItem {url} />
+        {#each orderedSpaceUrls as url (url)}
+          <div
+            class:opacity-60={draggedUrl === url}
+            draggable="true"
+            role="listitem"
+            ondragstart={e => onDragStart(e, url)}
+            ondragover={e => onDragOver(e, url)}
+            ondrop={e => onDrop(e, url)}
+            ondragend={onDragEnd}>
+            <MenuSpacesItem {url} />
+          </div>
         {:else}
           <div class="flex flex-col gap-8 items-center py-20">
             <p>You haven't added any spaces yet!</p>