feat: add support for video thumbnail preview in the attachment library (#6265)

#### What type of PR is this?

/kind feature

#### What this PR does / why we need it:

附件页面视频文件展示封面

#### Which issue(s) this PR fixes:

Fixes https://github.com/halo-dev/halo/issues/5945

#### Special notes for your reviewer:

![image](https://github.com/halo-dev/halo/assets/111493458/772aa224-fb56-445d-8da5-be5a67be2fa4)

#### Does this PR introduce a user-facing change?


```release-note
附件库支持预览视频封面。
```

ui/console-src/modules/contents/attachments/AttachmentList.vue

@@ -35,9 +35,12 @@ import AttachmentGroupList from "./components/AttachmentGroupList.vue";
 import AttachmentListItem from "./components/AttachmentListItem.vue";
 import AttachmentPoliciesModal from "./components/AttachmentPoliciesModal.vue";
 import AttachmentUploadModal from "./components/AttachmentUploadModal.vue";
+import AttachmentLoading from "./components/AttachmentLoading.vue";
+import AttachmentError from "./components/AttachmentError.vue";
 import { useAttachmentControl } from "./composables/use-attachment";
 import { useFetchAttachmentGroup } from "./composables/use-attachment-group";
 import { useFetchAttachmentPolicy } from "./composables/use-attachment-policy";
+import LazyVideo from "@/components/video/LazyVideo.vue";
 
 const { t } = useI18n();
 
@@ -526,24 +529,26 @@ onMounted(() => {
                         classes="pointer-events-none object-cover group-hover:opacity-75 transform-gpu"
                       >
                         <template #loading>
-                          <div
-                            class="flex h-full items-center justify-center object-cover"
-                          >
-                            <span class="text-xs text-gray-400">
-                              {{ $t("core.common.status.loading") }}...
-                            </span>
-                          </div>
+                          <AttachmentLoading />
                         </template>
                         <template #error>
-                          <div
-                            class="flex h-full items-center justify-center object-cover"
-                          >
-                            <span class="text-xs text-red-400">
-                              {{ $t("core.common.status.loading_error") }}
-                            </span>
-                          </div>
+                          <AttachmentError />
                         </template>
                       </LazyImage>
+                      <LazyVideo
+                        v-else-if="
+                          attachment?.spec.mediaType?.startsWith('video/')
+                        "
+                        :src="attachment.status?.permalink"
+                        classes="object-cover group-hover:opacity-75"
+                      >
+                        <template #loading>
+                          <AttachmentLoading />
+                        </template>
+                        <template #error>
+                          <AttachmentError />
+                        </template>
+                      </LazyVideo>
                       <AttachmentFileTypeIcon
                         v-else
                         :file-name="attachment.spec.displayName"

ui/console-src/modules/contents/attachments/components/AttachmentError.vue

@@ -0,0 +1,7 @@
+<template>
+  <div class="flex h-full items-center justify-center object-cover">
+    <span class="text-xs text-red-400">
+      {{ $t("core.common.status.loading_error") }}
+    </span>
+  </div>
+</template>

ui/console-src/modules/contents/attachments/components/AttachmentLoading.vue

@@ -0,0 +1,7 @@
+<template>
+  <div class="flex h-full items-center justify-center object-cover">
+    <span class="text-xs text-gray-400">
+      {{ $t("core.common.status.loading") }}...
+    </span>
+  </div>
+</template>

ui/src/components/video/LazyVideo.vue

@@ -0,0 +1,47 @@
+<script lang="ts" setup>
+import { onMounted, ref } from "vue";
+
+const props = withDefaults(
+  defineProps<{
+    src: string;
+    classes?: string | string[];
+  }>(),
+  {
+    src: "",
+    classes: "",
+  }
+);
+
+const isLoading = ref(false);
+const error = ref(false);
+
+const loadVideo = async () => {
+  const video = document.createElement("video");
+  video.src = props.src;
+  return new Promise((resolve, reject) => {
+    video.onloadedmetadata = () => resolve(video);
+    video.onerror = (err) => reject(err);
+  });
+};
+
+onMounted(async () => {
+  isLoading.value = true;
+  try {
+    await loadVideo();
+  } catch (e) {
+    error.value = true;
+  } finally {
+    isLoading.value = false;
+  }
+  isLoading.value = false;
+});
+</script>
+<template>
+  <template v-if="isLoading">
+    <slot name="loading"> loading... </slot>
+  </template>
+  <template v-else-if="error">
+    <slot name="error"> error </slot>
+  </template>
+  <video v-else :src="src" preload="metadata" :class="classes" />
+</template>