From 9e0e0f4359d11ea48c3f2d16f9690d740ee6aba3 Mon Sep 17 00:00:00 2001
From: Joscha <joscha@plugh.de>
Date: Wed, 26 Mar 2025 23:14:06 +0100
Subject: [PATCH] Port photo ui to vue

---
 pnpm-lock.yaml                                |  12 +
 showbits-thermal-printer-ui/package.json      |   1 +
 showbits-thermal-printer-ui/src/AppPhoto.vue  | 244 +++++++-----------
 .../src/components/CPhotoButtonFlip.vue       |  35 +++
 .../src/components/CPhotoButtonGallery.vue    |  30 +++
 .../src/components/CPhotoButtonRecord.vue     |  35 +++
 showbits-thermal-printer-ui/src/lib/assert.ts |  19 ++
 7 files changed, 230 insertions(+), 146 deletions(-)
 create mode 100644 showbits-thermal-printer-ui/src/components/CPhotoButtonFlip.vue
 create mode 100644 showbits-thermal-printer-ui/src/components/CPhotoButtonGallery.vue
 create mode 100644 showbits-thermal-printer-ui/src/components/CPhotoButtonRecord.vue
 create mode 100644 showbits-thermal-printer-ui/src/lib/assert.ts

diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index 7925840..5250269 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -17,6 +17,9 @@ importers:
 
   showbits-thermal-printer-ui:
     dependencies:
+      '@remixicon/vue':
+        specifier: ^4.6.0
+        version: 4.6.0(vue@3.5.13(typescript@5.8.2))
       vue:
         specifier: ^3.5.13
         version: 3.5.13(typescript@5.8.2)
@@ -450,6 +453,11 @@ packages:
   '@polka/url@1.0.0-next.28':
     resolution: {integrity: sha512-8LduaNlMZGwdZ6qWrKlfa+2M4gahzFkprZiAt2TF8uS0qQgBizKXpXURqvTJ4WtmupWxaLqjRb2UCTe72mu+Aw==}
 
+  '@remixicon/vue@4.6.0':
+    resolution: {integrity: sha512-OKDNBHM4gPbXZkYpKMu6xxLIP8LaioQQ7ipC10IfY4Wh5cmhrtA3aQIWgeCWGToRn1XoYoKAD8K95jUmE24hLQ==}
+    peerDependencies:
+      vue: '>= 3'
+
   '@rollup/pluginutils@5.1.4':
     resolution: {integrity: sha512-USm05zrsFxYLPdWWq+K3STlWiT/3ELn3RcV5hJMghpeAIhxfsUIg6mt12CBJBInWMV4VneoV7SfGv8xIwo2qNQ==}
     engines: {node: '>=14.0.0'}
@@ -1887,6 +1895,10 @@ snapshots:
 
   '@polka/url@1.0.0-next.28': {}
 
+  '@remixicon/vue@4.6.0(vue@3.5.13(typescript@5.8.2))':
+    dependencies:
+      vue: 3.5.13(typescript@5.8.2)
+
   '@rollup/pluginutils@5.1.4(rollup@4.37.0)':
     dependencies:
       '@types/estree': 1.0.7
diff --git a/showbits-thermal-printer-ui/package.json b/showbits-thermal-printer-ui/package.json
index 0d64269..fca440d 100644
--- a/showbits-thermal-printer-ui/package.json
+++ b/showbits-thermal-printer-ui/package.json
@@ -10,6 +10,7 @@
     "preview": "vite preview"
   },
   "dependencies": {
+    "@remixicon/vue": "^4.6.0",
     "vue": "^3.5.13"
   },
   "devDependencies": {
diff --git a/showbits-thermal-printer-ui/src/AppPhoto.vue b/showbits-thermal-printer-ui/src/AppPhoto.vue
index 6727867..5b5c9a3 100644
--- a/showbits-thermal-printer-ui/src/AppPhoto.vue
+++ b/showbits-thermal-printer-ui/src/AppPhoto.vue
@@ -1,93 +1,97 @@
 <script setup lang="ts">
-import { onMounted } from "vue";
+import { computed, onMounted, ref, useTemplateRef } from "vue";
+import CPhotoButtonFlip from "./components/CPhotoButtonFlip.vue";
+import CPhotoButtonGallery from "./components/CPhotoButtonGallery.vue";
+import CPhotoButtonRecord from "./components/CPhotoButtonRecord.vue";
+import { assert } from "./lib/assert";
+
+const video = useTemplateRef<HTMLVideoElement>("video");
+
+const live = ref(false);
+const facing = ref<string>();
+const mirrored = computed(() => facing.value === "user");
+const covered = ref(false);
+
+function getFacingModeFromStream(stream: MediaStream): string | undefined {
+  const videos = stream.getVideoTracks();
+  if (videos.length === 0) return undefined;
+  const video = videos[0];
+  return video?.getSettings().facingMode;
+}
+
+async function initStream(facingMode?: string) {
+  const stream = await navigator.mediaDevices.getUserMedia({
+    video: { facingMode: { ideal: facingMode } },
+  });
+
+  // Display stream as video
+  assert(video.value !== null);
+  video.value.srcObject = stream;
+
+  live.value = true;
+  facing.value = getFacingModeFromStream(stream);
+}
+
+async function waitAtLeast(duration: number, since: number) {
+  const now = Date.now();
+  const wait = duration - (now - since);
+  if (wait > 0) {
+    await new Promise((resolve) => setTimeout(resolve, wait));
+  }
+}
+
+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);
+
+  const form = new FormData();
+  form.append("image", blob);
+  form.append("caption", new Date().toLocaleString());
+
+  const start = Date.now();
+  covered.value = true;
+  try {
+    await fetch("api/image", { method: "POST", body: form });
+  } catch (e) {
+    console.error("Error uploading image:", e);
+  }
+  await waitAtLeast(500, start);
+  covered.value = false;
+}
+
+async function onFlip() {
+  const facingOpposite = facing.value === "user" ? "environment" : "user";
+  await initStream(facingOpposite);
+}
 
 onMounted(async () => {
-  const video = document.getElementById("video") as HTMLVideoElement;
-  const button = document.getElementById("button") as HTMLButtonElement;
-  const flip = document.getElementById("flip") as HTMLAnchorElement;
-  const cover = document.getElementById("cover") as HTMLDivElement;
-
-  const facing =
-    new URLSearchParams(window.location.search).get("facing") ?? undefined;
-
-  function getStreamFacingMode(stream: MediaStream): string | undefined {
-    const videos = stream.getVideoTracks();
-    if (videos.length === 0) return undefined;
-    const video = videos[0];
-    return video?.getSettings().facingMode;
-  }
-
-  async function initStream(facingMode?: string) {
-    // Display video
-    let stream = await navigator.mediaDevices.getUserMedia({
-      video: { facingMode: { ideal: facingMode } },
-    });
-    video.srcObject = stream;
-
-    // Flip video horizontally if it's facing the user
-    const facing = getStreamFacingMode(stream);
-    if (facing !== "environment") {
-      video.classList.add("mirrored");
-    }
-
-    // Enable or disable flip button
-    const canFlip = facing !== undefined;
-    const facingOpposite = facing === "user" ? "environment" : "user";
-    flip.hidden = !canFlip;
-    flip.setAttribute("href", `?facing=${facingOpposite}`);
-  }
-
-  await initStream(facing);
-
-  async function waitAtLeast(duration: number, since: number) {
-    const now = Date.now();
-    const wait = duration - (now - since);
-    if (wait > 0) {
-      await new Promise((resolve) => setTimeout(resolve, wait));
-    }
-  }
-
-  button.addEventListener("click", () => {
-    const canvas = document.createElement("canvas");
-    const scale = 384 / video.videoWidth;
-    canvas.width = video.videoWidth * scale;
-    canvas.height = video.videoHeight * scale;
-    // eslint-disable-next-line @typescript-eslint/no-non-null-assertion
-    const ctx = canvas.getContext("2d")!;
-    ctx.drawImage(video, 0, 0, canvas.width, canvas.height);
-
-    // eslint-disable-next-line @typescript-eslint/no-misused-promises
-    canvas.toBlob(async (blob) => {
-      if (blob === null) return;
-
-      const form = new FormData();
-      form.append("image", blob);
-      form.append("caption", new Date().toLocaleString());
-
-      const start = Date.now();
-      cover.classList.remove("hidden");
-      try {
-        await fetch("api/image", { method: "POST", body: form });
-      } catch (e) {
-        console.error("Error uploading image:", e);
-      }
-      await waitAtLeast(500, start);
-      cover.classList.add("hidden");
-    });
-  });
+  await initStream();
 });
 </script>
 
 <template>
-  <video id="video" autoplay playsinline></video>
-  <button id="button"><div class="circle"></div></button>
-  <a id="flip" hidden>
-    <svg viewBox="0 0 6 6">
-      <path fill="#fff" stroke="none" d="M0,2h1v4h1v-4h1l-1.5,-2"></path>
-      <path fill="#fff" stroke="none" d="M3,4h1v-4h1v4h1l-1.5,2"></path>
-    </svg>
-  </a>
-  <div id="cover" class="hidden"></div>
+  <video ref="video" :class="{ mirrored }" autoplay playsinline></video>
+  <div class="buttons">
+    <CPhotoButtonGallery style="visibility: hidden" />
+    <CPhotoButtonRecord :disabled="!live" @click="onRecord" />
+    <CPhotoButtonFlip :disabled="facing === undefined" @click="onFlip" />
+  </div>
+  <div class="cover" :class="{ hidden: !covered }"></div>
 </template>
 
 <style>
@@ -95,7 +99,9 @@ body {
   margin: 0;
   background-color: black;
 }
+</style>
 
+<style scoped>
 video {
   position: absolute;
   width: 100%;
@@ -106,72 +112,18 @@ video.mirrored {
   scale: -1 1;
 }
 
-#button {
+.buttons {
   position: absolute;
-  bottom: 20px;
-  left: 50%;
-  transform: translateX(-50%);
+  bottom: 0;
+  width: 100%;
+  margin-bottom: 20px;
 
-  width: 100px;
-  height: 100px;
-
-  border: 10px solid #f00;
-  border-radius: 100px;
-  background-color: transparent;
+  display: flex;
+  justify-content: space-evenly;
+  align-items: center;
 }
 
-#button:active {
-  border-color: #fff;
-}
-
-#button .circle {
-  width: 60px;
-  height: 60px;
-  border-radius: 60px;
-  margin: auto;
-
-  background-color: #f00;
-}
-
-#button:active .circle {
-  background-color: #a00;
-}
-
-#flip {
-  position: absolute;
-  bottom: 20px;
-  right: 20px;
-
-  box-sizing: border-box;
-  width: 60px;
-  height: 60px;
-
-  background-color: transparent;
-  border: 5px solid #fff;
-  border-radius: 100px;
-
-  touch-action: manipulation;
-}
-
-#flip:active {
-  background-color: #fff;
-}
-
-#flip svg {
-  width: 60%;
-  height: 60%;
-
-  position: relative;
-  left: 50%;
-  top: 50%;
-  transform: translate(-50%, -50%);
-}
-
-#flip:active path {
-  fill: #000;
-}
-
-#cover {
+.cover {
   position: absolute;
   width: 100%;
   height: 100%;
@@ -179,7 +131,7 @@ video.mirrored {
   transition: background-color 100ms linear;
 }
 
-#cover.hidden {
+.cover.hidden {
   background-color: transparent;
   pointer-events: none;
 }
diff --git a/showbits-thermal-printer-ui/src/components/CPhotoButtonFlip.vue b/showbits-thermal-printer-ui/src/components/CPhotoButtonFlip.vue
new file mode 100644
index 0000000..80e3f5c
--- /dev/null
+++ b/showbits-thermal-printer-ui/src/components/CPhotoButtonFlip.vue
@@ -0,0 +1,35 @@
+<script setup lang="ts">
+import { RiCameraSwitchFill } from "@remixicon/vue";
+</script>
+
+<template>
+  <button>
+    <RiCameraSwitchFill size="48px" />
+  </button>
+</template>
+
+<style scoped>
+button {
+  padding: 8px;
+
+  color: white;
+  border: 5px solid white;
+  border-radius: 100px;
+  background-color: transparent;
+}
+
+button:enabled:active {
+  color: black;
+  background-color: white;
+}
+
+button:disabled {
+  --disabled: #444;
+  color: var(--disabled);
+  border-color: var(--disabled);
+}
+
+svg {
+  display: block;
+}
+</style>
diff --git a/showbits-thermal-printer-ui/src/components/CPhotoButtonGallery.vue b/showbits-thermal-printer-ui/src/components/CPhotoButtonGallery.vue
new file mode 100644
index 0000000..3d920c2
--- /dev/null
+++ b/showbits-thermal-printer-ui/src/components/CPhotoButtonGallery.vue
@@ -0,0 +1,30 @@
+<script setup lang="ts">
+import { RiMultiImageFill } from "@remixicon/vue";
+</script>
+
+<template>
+  <label>
+    <RiMultiImageFill size="48px" />
+  </label>
+</template>
+
+<style scoped>
+label {
+  padding: 8px;
+
+  border: 5px solid white;
+  border-radius: 100px;
+  background-color: transparent;
+
+  color: white;
+}
+
+label:active {
+  background-color: white;
+  color: black;
+}
+
+svg {
+  display: block;
+}
+</style>
diff --git a/showbits-thermal-printer-ui/src/components/CPhotoButtonRecord.vue b/showbits-thermal-printer-ui/src/components/CPhotoButtonRecord.vue
new file mode 100644
index 0000000..f76e862
--- /dev/null
+++ b/showbits-thermal-printer-ui/src/components/CPhotoButtonRecord.vue
@@ -0,0 +1,35 @@
+<script setup lang="ts"></script>
+
+<template>
+  <button><div></div></button>
+</template>
+
+<style scoped>
+button {
+  width: 100px;
+  height: 100px;
+
+  --color: red;
+
+  border: 10px solid var(--color);
+  border-radius: 100px;
+  background-color: transparent;
+}
+
+button:enabled:active {
+  --color: white;
+}
+
+button:disabled {
+  --color: #444;
+}
+
+button div {
+  width: 60px;
+  height: 60px;
+  border-radius: 60px;
+  margin: auto;
+
+  background-color: var(--color);
+}
+</style>
diff --git a/showbits-thermal-printer-ui/src/lib/assert.ts b/showbits-thermal-printer-ui/src/lib/assert.ts
new file mode 100644
index 0000000..a740711
--- /dev/null
+++ b/showbits-thermal-printer-ui/src/lib/assert.ts
@@ -0,0 +1,19 @@
+export class AssertionError extends Error {}
+
+export function assert(
+  condition: boolean,
+  description?: string,
+): asserts condition {
+  if (condition) return;
+  if (description === undefined) {
+    description = "assertion failed";
+    console.error("assertion failed");
+  } else {
+    console.error("assertion failed:", description);
+  }
+  throw new AssertionError(description);
+}
+
+export function assertUnreachable(): never {
+  assert(false, "unreachable code reached");
+}