layout sharing via url

[deploy]

src/lib/components/Navigation.svelte

@@ -2,7 +2,8 @@
   import {serialPort, syncStatus} from "$lib/serial/connection"
   import {browser} from "$app/environment"
   import {page} from "$app/stores"
-  import {slide} from "svelte/transition"
+  import {slide, fly} from "svelte/transition"
+  import {canShare, triggerShare} from "$lib/share"
 
   const training = [
     {slug: "cpm", title: "CPM - Characters Per Minute", icon: "music_note"},
@@ -29,6 +30,10 @@
   </div>
 
   <div class="actions">
+    {#if $canShare}
+      <a transition:fly={{x: -8}} class="icon" on:click={triggerShare}>share</a>
+      <div transition:slide class="separator" />
+    {/if}
     {#await import("$lib/components/PwaStatus.svelte") then { default: PwaStatus }}
       <PwaStatus />
     {/await}
@@ -63,7 +68,7 @@
     >
       cable
     </a>
-    <a href="/" title="Statistics" class="icon account">person</a>
+    <a href="/stats/" title="Statistics" class="icon account">person</a>
   </div>
 </nav>
 
@@ -119,6 +124,12 @@
     border-radius: 4px;
   }
 
+  .separator {
+    width: 1px;
+    height: 24px;
+    background: var(--md-sys-color-outline-variant);
+  }
+
   nav {
     display: flex;
     gap: 4px;
@@ -143,6 +154,10 @@
 
     position: relative;
 
+    display: flex;
+    align-items: center;
+    justify-content: center;
+
     aspect-ratio: 1;
     padding: 4px;
 
@@ -168,6 +183,9 @@
   }
 
   .steps {
+    position: absolute;
+    left: 50%;
+    translate: -50% 0;
     display: flex;
 
     > a.icon {

src/lib/serial/serialization.ts

@@ -21,9 +21,7 @@ export async function getSharableUrl(name: string, data: any, baseHref = window.
   return new Promise(async resolve => {
     const reader = new FileReader()
     reader.onloadend = function () {
-      const base64String = (reader.result as string)
-        .replace(/^data:application\/octet-stream;base64,/, "")
-        .replace(/==$/, "")
+      const base64String = (reader.result as string).replace(/^data:application\/octet-stream;base64,/, "")
       const url = new URL(baseHref)
       url.searchParams.set(name, base64String)
       resolve(url)
@@ -31,3 +29,15 @@ export async function getSharableUrl(name: string, data: any, baseHref = window.
     reader.readAsDataURL(await stringifyCompressed(data))
   })
 }
+
+export async function parseSharableUrl<T>(
+  name: string,
+  url: string = window.location.href,
+): Promise<T | undefined> {
+  const searchParams = new URL(url).searchParams
+  if (!searchParams.has(name)) return
+
+  return await fetch(`data:application/octet-stream;base64,${searchParams.get(name)}`)
+    .then(it => it.blob())
+    .then(it => parseCompressed(it))
+}

src/lib/share.ts

@@ -0,0 +1,22 @@
+import type {Action} from "svelte/action"
+import {readonly, writable} from "svelte/store"
+
+const setCanShare = writable(false)
+export const canShare = readonly(setCanShare)
+
+let shareCallback: ((event: Event) => void) | undefined
+export function triggerShare(event: Event) {
+  shareCallback?.(event)
+}
+
+export const share: Action<Window, (event: Event) => void> = (node, callback: (event: Event) => void) => {
+  setCanShare.set(true)
+  shareCallback = callback
+
+  return {
+    destroy() {
+      setCanShare.set(false)
+      shareCallback = undefined
+    },
+  }
+}