initial implementation of placeholder images, thumbnails and blurring between using sharp

src/lib/components/Card.svelte

@@ -10,17 +10,19 @@ if(icon_override){
 	current_month = recipe.season[0]
 }
 
+let isloaded = false
 </script>
 <style>
 .card{
+	flex-shrink: 0;
 	--card-width: 300px;
 	text-decoration: none;
 	position: relative;
 	box-sizing: border-box;
 	font-family: sans-serif;
 	cursor: pointer;
+	height: calc(7/4 * var(--card-width)); /* otherwise card is not initialized at correct size and readjusts when populated*/
 	width: var(--card-width);
-	aspect-ratio: 4/7;
 	border-radius: 20px;
 	background-size: contain;
 	display: flex;
@@ -28,7 +30,32 @@ if(icon_override){
 	justify-content: end;
 	background-color:  var(--blue);
 	box-shadow: 0em 0em 2em 0.1em rgba(0, 0, 0, 0.3);
+}
+.card #image{
+	width: var(--card-width);
+	height: calc(var(--card-width)*0.85);
+	object-fit: cover;
 	transition: 200ms;
+	backdrop-filter: blur(10px);
+	filter: blur(10px);
+}
+.unblur{
+	filter: blur(0px) !important;
+}
+div:has(#image){
+	width: var(--card-width);
+	background-repeat: no-repeat;
+	background-size: cover;
+	background-position: center;
+	overflow: hidden;
+	border-top-left-radius: inherit;
+	border-top-right-radius: inherit;
+}
+div:has(div #image){
+	height: 100%;
+	position: absolute;
+	width: var(--card-width);
+	top: 0;
 }
 .card:hover,
 .card:focus-within{
@@ -39,12 +66,6 @@ if(icon_override){
 .card:active{
 	scale: 0.95 0.95;
 }
-.card img{
-	height: 50%;
-	object-fit: cover;
-	border-top-left-radius: inherit;
-	border-top-right-radius: inherit;
-}
 .card .title {
 	position: relative;
 	box-sizing: border-box;
@@ -129,14 +150,20 @@ if(icon_override){
 .card:hover .icon,
 .card:focus-visible .icon
 {
-	animation:  shake 0.6s
+	animation: shake 0.6s;
 }
 </style>
+
 <a class="card {search}" href="/rezepte/{recipe.short_name}" data-tags=[{recipe.tags}]>
-{#if icon_override || recipe.season.includes(current_month)}
+	<div>
+	<div style="background-image:url({'https://new.bocken.org/static/rezepte/placeholder/' + recipe.short_name + '.webp'})">
+	<img class:unblur={isloaded} id=image src={'https://new.bocken.org/static/rezepte/thumb/' + recipe.short_name + '.webp'} loading=lazy  alt="{recipe.alt}" on:load={() => isloaded=true}/>
+	</div>
+	</div>
+	{#if icon_override || recipe.season.includes(current_month)}
 	<a class=icon href="/rezepte/icon/{recipe.icon}">{recipe.icon}</a>
 {/if}
-	<img width=300px height=300px src="/images/{recipe.images[0].mediapath}" alt="{recipe.alt}" />
+
 	<div class=title>
 		<a class=category href="/rezepte/category/{recipe.category}" >{recipe.category}</a>
 		<div>

src/lib/components/Icon.svelte

@@ -0,0 +1,21 @@
+<script lang="ts">
+	import '$lib/css/nordtheme.css';
+	import "$lib/css/shake.css"
+	export let icon : string;
+</script>
+<style>
+	a{
+		font-size: 2rem;
+		text-decoration: none;
+		padding: 0.5em;
+		background-color: var(--nord4);
+		border-radius: 1000px;
+    		box-shadow: 0em 0em 0.5em 0.2em rgba(0, 0, 0, 0.2);
+	}
+	a:hover{
+		--angle: 15deg;
+		animation: shake 0.5s ease forwards;
+	}
+
+</style>
+<a href="/rezepte/icon/{icon}" {...$$restProps} >{icon}</a>

src/lib/components/IngredientsPage.svelte

@@ -27,7 +27,7 @@ h4{
 {#if data.ingredients}
 <div class=ingredients>
 {#if data.portions}
-	<h4>Portionen:</h4>
+	<h3>Portionen:</h3>
 	{data.portions}
 {/if}
 <h2>Zutaten</h2>

src/lib/components/TitleImgParallax.svelte

@@ -1,5 +1,7 @@
 <script>
 	export let src
+	export let placeholder_src
+	let isloaded=false
 </script>
 <style>
 :root {
@@ -46,7 +48,7 @@
   z-index: -10;
 }
 
-.image-container img {
+#image{
   display: block;
   position: absolute;
   top: 0;
@@ -54,8 +56,10 @@
   z-index: -1;
   height: max(60dvh,600px);
   object-fit: cover;
-  /*object-position: top;*/
   object-position: 50% 20%;
+  backdrop-filter: blur(20px);
+  transition: 50ms;
+  filter: blur(20px);
 }
 
 .image-container::after {
@@ -68,9 +72,33 @@
 :global(h1){
 	width: 100%;
 }
-
+.placeholder{
+	background-repeat: no-repeat;
+	background-size: cover;
+	background-position: 50% 20%;
+	position: absolute;
+        width: min(1000px, 100dvw);
+  	height: max(60dvh,600px);
+	z-index: -2;
+}
+div:has(.placeholder){
+	position: absolute;
+	top: 0;
+        width: min(1000px, 100dvw);
+  	height: max(60dvh,600px);
+	overflow: hidden;
+}
+.unblur#image{
+	filter: blur(0px) !important;
+}
 </style>
 <section class="section">
-    <figure class="image-container"><img {src} alt=""/></figure>
+    <figure class="image-container">
+    	<div>
+		<div class=placeholder style="background-image:url({placeholder_src})" >
+			<img class:unblur={isloaded} id=image {src} on:load={() => isloaded=true} alt=""/>
+		</div>
+	</div>
+	</figure>
     <div class=content><slot></slot></div>
 </section>

src/models/Recipe.ts

@@ -38,7 +38,7 @@ const RecipeSchema = new mongoose.Schema(
      		      steps: [String]}],
      preamble : String,
      addendum : String,
-     },
+     }, {timestamps: true}
 );
 
 export const Recipe = mongoose.model("Recipe", RecipeSchema);

src/routes/api/img/add/+server.ts

@@ -3,18 +3,40 @@ import path from 'path'
 import type { RequestHandler } from '@sveltejs/kit';
 import { BEARER_TOKEN } from '$env/static/private'
 import { error } from '@sveltejs/kit';
+import { Image } from '../../../../models/Image';
+import { IMAGE_DIR } from '$env/static/private'
+import sharp from 'sharp';
 
 export const POST =  (async ({ request })  => {
     const data = await request.json();
-    const filePath = path.join(
-            process.cwd(),
-            "static",
-            "images",
-	    data.filename as string
-        );
-    const file = data.image;
     if(data.bearer === BEARER_TOKEN){
-    	writeFileSync(filePath, file, 'base64');
+	let full_res = new Buffer.from(data.image, 'base64')
+	// reduce image size if over 500KB
+	const MAX_SIZE_KB = 500
+	//const metadata = await sharp(full_res).metadata()
+	////reduce image size if larger than 500KB
+	//if(metadata.size > MAX_SIZE_KB*1000){
+	//	full_res = sharp(full_res).
+	//		webp( { quality: 70})
+	//		.toBuffer()
+	//}
+	await sharp(full_res)
+		.toFormat('webp')
+		.toFile(path.join(IMAGE_DIR,
+				  "full",
+				  data.name + ".webp"))
+	await sharp(full_res)
+		.resize({ width: 800})
+		.toFormat('webp')
+		.toFile(path.join(IMAGE_DIR,
+			  "thumb",
+			  data.name + ".webp"))
+	await sharp(full_res)
+		.resize({ width: 20})
+		.toFormat('webp')
+		.toFile(path.join(IMAGE_DIR,
+			  "placeholder",
+			  data.name + ".webp"))
 	return new Response(JSON.stringify({msg: "Added image successfully"}),{
 			    status: 200,
   	});