From 485063f8d230ea5863c3318242d3bcb26c8a203e Mon Sep 17 00:00:00 2001
From: Gleb Koval <gleb@koval.net>
Date: Thu, 5 Jun 2025 17:47:08 +0100
Subject: [PATCH] feat: multi-image uploads

---
 src/lib/components/Carousel.svelte            | 33 +++++++++-----
 .../inputs/{Image.svelte => Images.svelte}    | 28 +++++++++++-
 src/routes/space/+page.svelte                 | 43 +++++++++++--------
 3 files changed, 74 insertions(+), 30 deletions(-)
 rename src/lib/components/inputs/{Image.svelte => Images.svelte} (63%)

diff --git a/src/lib/components/Carousel.svelte b/src/lib/components/Carousel.svelte
index b26229c..4eb0777 100644
--- a/src/lib/components/Carousel.svelte
+++ b/src/lib/components/Carousel.svelte
@@ -12,13 +12,20 @@
     let carousel = $state<HTMLDivElement>();
     let scrollPosition = $state(0);
     let scrollWidth = $state(0);
-    let clientWidth = $state(0);
+    let clientWidth = $state(1);
     function updateScroll() {
         scrollPosition = carousel?.scrollLeft || 0;
         scrollWidth = carousel?.scrollWidth || 0;
-        clientWidth = carousel?.clientWidth || 0;
+        clientWidth = carousel?.clientWidth || 1;
     }
-    onMount(updateScroll);
+    onMount(() => {
+        const id = setInterval(() => {
+            if (carousel) {
+                updateScroll();
+            }
+        }, 1000);
+        return () => clearInterval(id);
+    });
 </script>
 
 <div class="controls">
@@ -37,7 +44,8 @@
     {#if scrollPosition > clientWidth / 2}
         <button
             class="arrow left"
-            onclick={() => {
+            onclick={(e) => {
+                e.preventDefault();
                 if (carousel) carousel.scrollLeft -= carousel.clientWidth;
             }}
         >
@@ -47,7 +55,8 @@
     {#if scrollPosition < scrollWidth - clientWidth * 1.5}
         <button
             class="arrow right"
-            onclick={() => {
+            onclick={(e) => {
+                e.preventDefault();
                 if (carousel) carousel.scrollLeft += carousel.clientWidth;
             }}
         >
@@ -95,12 +104,14 @@
         background-color: rgba(0, 0, 0, 0.5);
         border-radius: 9999px;
     }
-    .arrow {
+    .arrow,
+    .delete {
         cursor: pointer;
         width: 2rem;
         aspect-ratio: 1 / 1;
     }
-    .arrow img {
+    .arrow img,
+    .delete img {
         width: 1.4rem;
     }
     .arrow:hover {
@@ -120,14 +131,14 @@
         transform: translateY(-50%);
     }
     .delete {
-        top: 0.1rem;
-        right: 0.1rem;
+        top: 0.4rem;
+        right: 0.2rem;
     }
     .position {
         font-size: 0.8rem;
-        bottom: 0.7rem;
+        top: 0.4rem;
         border-radius: 1rem;
-        right: 0.2rem;
+        left: 0.2rem;
         padding: 0.3rem 0.5rem;
         background-color: rgba(0, 0, 0, 0.7);
     }
diff --git a/src/lib/components/inputs/Image.svelte b/src/lib/components/inputs/Images.svelte
similarity index 63%
rename from src/lib/components/inputs/Image.svelte
rename to src/lib/components/inputs/Images.svelte
index 53e5caa..123cdf3 100644
--- a/src/lib/components/inputs/Image.svelte
+++ b/src/lib/components/inputs/Images.svelte
@@ -1,5 +1,6 @@
 <script lang="ts">
     import cameraUrl from "$lib/assets/camera.svg";
+    import Carousel from "../Carousel.svelte";
 
     interface Props {
         name: string;
@@ -18,14 +19,37 @@
     class:no-bg={files && files.length > 0}
 >
     {#if files && files.length > 0}
-        <img src={URL.createObjectURL(files[0])} alt="uploaded study space" class="preview" />
+        <Carousel
+            urls={files
+                ? Array(files.length)
+                      .keys()
+                      .map((i) => URL.createObjectURL(files![i]))
+                      .toArray()
+                : []}
+            ondelete={(idx) => {
+                if (!files) return;
+                const dt = new DataTransfer();
+                for (let i = 0; i < files.length; i++) {
+                    if (i !== idx) dt.items.add(files[i]);
+                }
+                files = dt.files;
+            }}
+        />
     {:else}
         <div class="message">
             <img src={cameraUrl} class="icon" alt="camera icon" />
             <span>Click to upload a photo</span>
         </div>
     {/if}
-    <input type="file" id={name} {name} accept=".png, .jpg, .jpeg, .svg" {...rest} bind:files />
+    <input
+        type="file"
+        id={name}
+        {name}
+        multiple
+        accept=".png, .jpg, .jpeg, .svg"
+        {...rest}
+        bind:files
+    />
 </label>
 
 <style>
diff --git a/src/routes/space/+page.svelte b/src/routes/space/+page.svelte
index 9a6eb2e..8c3267d 100644
--- a/src/routes/space/+page.svelte
+++ b/src/routes/space/+page.svelte
@@ -5,13 +5,13 @@
     import Navbar from "$lib/components/Navbar.svelte";
     import crossUrl from "$lib/assets/cross.svg";
     import Button from "$lib/components/Button.svelte";
-    import Image from "$lib/components/inputs/Image.svelte";
+    import Images from "$lib/components/inputs/Images.svelte";
     import type { Table } from "$lib";
 
     const { data } = $props();
     const { supabase } = $derived(data);
 
-    let spaceImg = $state<FileList>();
+    let spaceImgs = $state<FileList>();
     let studySpaceData = $state<Omit<Table<"study_spaces">, "id" | "created_at" | "updated_at">>({
         description: "",
         building_location: "",
@@ -19,8 +19,7 @@
     });
 
     async function uploadStudySpace() {
-        const imageFile = spaceImg?.[0];
-        if (!imageFile) return alert("Please select an image file.");
+        if (!spaceImgs || spaceImgs.length < 1) return alert("Please select an image file.");
 
         const { data: studySpaceInsert, error: studySpaceError } = await supabase
             .from("study_spaces")
@@ -30,21 +29,31 @@
         if (studySpaceError)
             return alert(`Error uploading study space: ${studySpaceError.message}`);
 
-        const { data: imgUpload, error: imageError } = await supabase.storage
-            .from("files_bucket")
-            .upload(`public/${studySpaceInsert.id}-${imageFile.name}`, imageFile, {
-                contentType: imageFile.type
-            });
+        const imgUploads = await Promise.all(
+            Array(spaceImgs.length)
+                .keys()
+                .map(async (i) => {
+                    const imageFile = spaceImgs![i];
+                    const resp = await supabase.storage
+                        .from("files_bucket")
+                        .upload(`public/${studySpaceInsert.id}-${imageFile.name}`, imageFile, {
+                            contentType: imageFile.type
+                        });
+                    return resp;
+                })
+        );
+        const imageError = imgUploads.find(({ error }) => error)?.error;
         if (imageError) return alert(`Error uploading image: ${imageError.message}`);
 
         const { error: imageInsertError } = await supabase
             .from("study_space_images")
-            .insert({
-                study_space_id: studySpaceInsert.id,
-                image_path: imgUpload.path
-            })
-            .select()
-            .single();
+            .insert(
+                imgUploads.map(({ data }) => ({
+                    study_space_id: studySpaceInsert.id,
+                    image_path: data!.path
+                }))
+            )
+            .select();
         if (imageInsertError) return alert(`Error creating image: ${imageInsertError.message}`);
 
         alert("Thank you for your contribution!");
@@ -67,7 +76,7 @@
         await uploadStudySpace();
     }}
 >
-    <Image name="study-space-image" minHeight="16rem" bind:files={spaceImg} required />
+    <Images name="study-space-image" minHeight="16rem" bind:files={spaceImgs} required />
 
     <label for="location">Enter the name:</label>
     <Text
@@ -97,7 +106,7 @@
     <div class="submit">
         <Button
             type="submit"
-            disabled={(spaceImg?.length || 0) === 0 ||
+            disabled={(spaceImgs?.length || 0) === 0 ||
                 !studySpaceData.location ||
                 !studySpaceData.description ||
                 !studySpaceData.building_location}
-- 
2.49.1