From 5ce7625f6b80565000f437736e46f54099decaac Mon Sep 17 00:00:00 2001
From: Joscha <joscha@plugh.de>
Date: Wed, 26 Mar 2025 23:52:26 +0100
Subject: [PATCH] Add gallery button

---
 showbits-thermal-printer-ui/src/AppPhoto.vue  | 49 +++++++++++--------
 .../src/components/CPhotoButtonGallery.vue    | 19 +++++++
 2 files changed, 47 insertions(+), 21 deletions(-)

diff --git a/showbits-thermal-printer-ui/src/AppPhoto.vue b/showbits-thermal-printer-ui/src/AppPhoto.vue
index bce0d70..5e486ff 100644
--- a/showbits-thermal-printer-ui/src/AppPhoto.vue
+++ b/showbits-thermal-printer-ui/src/AppPhoto.vue
@@ -51,27 +51,9 @@ async function waitAtLeast(duration: number, since: number) {
   }
 }
 
-async function onRecord() {
-  assert(video.value !== null);
-
-  const canvas = document.createElement("canvas");
-
-  const scale = 384 / video.value.videoWidth;
-  canvas.width = video.value.videoWidth * scale;
-  canvas.height = video.value.videoHeight * scale;
-
-  const ctx = canvas.getContext("2d");
-  assert(ctx !== null);
-
-  ctx.drawImage(video.value, 0, 0, canvas.width, canvas.height);
-
-  const blob = await new Promise<Blob | null>((resolve) => {
-    canvas.toBlob(resolve);
-  });
-  assert(blob !== null);
-
+async function postImage(image: Blob | File) {
   const form = new FormData();
-  form.append("image", blob);
+  form.append("image", image);
   form.append("caption", new Date().toLocaleString());
 
   const start = Date.now();
@@ -85,6 +67,31 @@ async function onRecord() {
   covered.value = false;
 }
 
+async function onGallery(file: File) {
+  await postImage(file);
+}
+
+async function onRecord() {
+  assert(video.value !== null);
+  const video_ = video.value;
+
+  const canvas = document.createElement("canvas");
+  const ctx = canvas.getContext("2d");
+  assert(ctx !== null);
+
+  const scale = 384 / video_.videoWidth;
+  canvas.width = video_.videoWidth * scale; // Yes, slightly redundant
+  canvas.height = video_.videoHeight * scale;
+  ctx.drawImage(video_, 0, 0, canvas.width, canvas.height);
+
+  const blob = await new Promise<Blob | null>((resolve) => {
+    canvas.toBlob(resolve);
+  });
+  assert(blob !== null);
+
+  await postImage(blob);
+}
+
 async function onFlip() {
   const facingOpposite = facing.value === "user" ? "environment" : "user";
   await initStream(facingOpposite);
@@ -98,7 +105,7 @@ onMounted(async () => {
 <template>
   <video ref="video" :class="{ mirrored }" autoplay playsinline></video>
   <div class="buttons">
-    <CPhotoButtonGallery style="visibility: hidden" />
+    <CPhotoButtonGallery @click="onGallery" />
     <CPhotoButtonRecord :disabled="stream === undefined" @click="onRecord" />
     <CPhotoButtonFlip
       :disabled="stream === undefined || facing === undefined"
diff --git a/showbits-thermal-printer-ui/src/components/CPhotoButtonGallery.vue b/showbits-thermal-printer-ui/src/components/CPhotoButtonGallery.vue
index 3d920c2..640c984 100644
--- a/showbits-thermal-printer-ui/src/components/CPhotoButtonGallery.vue
+++ b/showbits-thermal-printer-ui/src/components/CPhotoButtonGallery.vue
@@ -1,10 +1,25 @@
 <script setup lang="ts">
 import { RiMultiImageFill } from "@remixicon/vue";
+import { useTemplateRef } from "vue";
+
+const emit = defineEmits<{
+  click: [file: File];
+}>();
+
+const image = useTemplateRef<HTMLInputElement>("image");
+
+function onImageChange() {
+  const theFile = image.value?.files?.[0];
+  if (theFile === undefined) return;
+  if (!theFile.type.startsWith("image/")) return;
+  emit("click", theFile);
+}
 </script>
 
 <template>
   <label>
     <RiMultiImageFill size="48px" />
+    <input ref="image" type="file" accept="image/*" @change="onImageChange" />
   </label>
 </template>
 
@@ -27,4 +42,8 @@ label:active {
 svg {
   display: block;
 }
+
+input {
+  display: none;
+}
 </style>