feat(front): implement FileUpload and FileUploadField components for file drag-and-drop functionality and preview

front/components/Field/FileUploadField.vue

@@ -0,0 +1,68 @@
+<script setup lang="ts">
+import FileUpload from '~/components/FileUpload.vue'
+import { cx } from 'class-variance-authority'
+import { filesize } from 'filesize'
+
+const props = defineProps<{
+    name: string
+    rules?: string
+}>()
+const { value, setValue } = useField<File>(props?.name, props?.rules)
+watch(value, (v) => {
+    console.log('value', v)
+})
+
+const imageUrl = computed(() => {
+    if (value?.value?.type?.startsWith('image/')) {
+        return URL.createObjectURL(value?.value)
+    }
+    return null
+})
+
+const fileInfo = computed(() => {
+    const [,name, ext] = value?.value?.name?.match(/^(.+)\.(.+)$/) || []
+    return { name, ext }
+})
+
+onUnmounted(() => {
+    if (imageUrl.value) {
+        URL.revokeObjectURL(imageUrl.value)
+    }
+})
+
+</script>
+
+<template>
+    <FileUpload @onChange="(file) => {
+        setValue(file)
+    }" v-slot="{ isOverDropZone }">
+        <div :class="cx('bg-white/50 rounded-md p-2 w-full h-40 flex flex-col items-center justify-center border border-dashed border-black/20 cursor-pointer text-gray-500 gap-3',
+            isOverDropZone && '!bg-green-100/50 '
+        )">
+            <template v-if="!!value">
+                <div v-if="!!imageUrl" class="flex size-16">
+                    <div class="object-contain mx-auto">
+                        <img :src="imageUrl" class="w-full h-full  border border-black/20 rounded" />
+                    </div>
+                </div>
+                <div v-if="!imageUrl" class="size-16 flex justify-center items-center rounded-xl bg-white/80">
+                    <LucideFile class="size-10" />
+                </div>
+                <div class="flex flex-col gap-0.5 items-center">
+                    <div class="flex max-w-30 w-full">
+                        <div class="truncate">{{ fileInfo?.name }}</div>
+                        <div>{{ `.${fileInfo?.ext}` }}</div>
+                    </div>
+                    <div class="text-xs opacity-50">{{ filesize(value?.size) }}</div>
+                </div>
+            </template>
+            <template v-else>
+                <LucideUpload class="size-10" />
+                <div class="text-sm">
+                    拖拽文件 或 点击上传
+                </div>
+            </template>
+
+        </div>
+    </FileUpload>
+</template>

front/components/FileUpload.vue

@@ -0,0 +1,59 @@
+<script setup lang="ts">
+import { useDropZone } from '@vueuse/core'
+const dropZoneRef = ref()
+
+const props = defineProps<{
+  accept?: string[]
+}>()
+
+const accept = computed(() => (props?.accept || ['image/*', 'video/*'])?.join(','))
+
+const emit = defineEmits<{
+  (e: 'onChange', file: File): void
+}>()
+
+const { isOverDropZone } = useDropZone(dropZoneRef, {
+  onDrop: (file) => {
+    if (file?.[0]) {
+      emit('onChange', file?.[0])
+    }
+  },
+  // 指定要接收的数据类型
+  dataTypes: (types) => {
+    for (const type of types) {
+      for (const acceptType of accept.value.split(',')) {
+        if (acceptType?.endsWith('*')) {
+          const [acceptTypePrefix,] = acceptType?.split('/')
+          if (type?.startsWith(acceptTypePrefix)) {
+            return true
+          }
+        }
+        if (acceptType === type) {
+          return true
+        }
+      }
+    }
+    return false
+  },
+  // 控制多文件拖放
+  multiple: false,
+  // 是否阻止未处理事件的默认行为
+  preventDefaultForUnhandled: false,
+})
+
+const { open, onChange } = useFileDialog({
+  accept: accept.value, // Set to accept only image files
+  directory: false,
+})
+onChange((files) => {
+  if (files?.[0]) {
+    emit('onChange', files?.[0])
+  }
+})
+</script>
+
+<template>
+  <div ref="dropZoneRef" @click="open">
+    <slot :isOverDropZone="isOverDropZone" />
+  </div>
+</template>

front/package.json

@@ -29,6 +29,7 @@
     "@vee-validate/rules": "^4.15.0",
     "class-variance-authority": "^0.7.1",
     "clsx": "^2.1.1",
+    "filesize": "^10.1.6",
     "lodash-es": "^4.17.21",
     "lucide-vue-next": "^0.487.0",
     "motion-v": "1.0.0-beta.2",