feat(new tool): pdf signature checker (#745)

src/ui/c-file-upload/c-file-upload.vue

@@ -0,0 +1,95 @@
+<script lang="ts" setup>
+import _ from 'lodash';
+
+const props = withDefaults(defineProps<{
+  multiple?: boolean
+  accept?: string
+  title?: string
+}>(), {
+  multiple: false,
+  accept: undefined,
+  title: 'Drag and drop files here, or click to select files',
+});
+
+const emit = defineEmits<{
+  (event: 'filesUpload', files: File[]): void
+  (event: 'fileUpload', file: File): void
+}>();
+
+const { multiple } = toRefs(props);
+
+const isOverDropZone = ref(false);
+
+const fileInput = ref<HTMLInputElement | null>(null);
+
+function triggerFileInput() {
+  fileInput.value?.click();
+}
+
+function handleFileInput(event: Event) {
+  const files = (event.target as HTMLInputElement).files;
+
+  handleUpload(files);
+}
+
+function handleDrop(event: DragEvent) {
+  event.preventDefault();
+  const files = event.dataTransfer?.files;
+
+  handleUpload(files);
+}
+
+function handleUpload(files: FileList | null | undefined) {
+  if (_.isNil(files) || _.isEmpty(files)) {
+    return;
+  }
+
+  if (multiple.value) {
+    emit('filesUpload', Array.from(files));
+    return;
+  }
+
+  emit('fileUpload', files[0]);
+}
+</script>
+
+<template>
+  <div
+    class="flex flex-col cursor-pointer items-center justify-center border-2px border-gray-300 border-opacity-50 rounded-lg border-dashed p-8 transition-colors"
+    :class="{
+      'border-primary border-opacity-100': isOverDropZone,
+    }"
+    @click="triggerFileInput"
+    @drop.prevent="handleDrop"
+    @dragover.prevent
+    @dragenter="isOverDropZone = true"
+    @dragleave="isOverDropZone = false"
+  >
+    <input
+      ref="fileInput"
+      type="file"
+      class="hidden"
+      :multiple="multiple"
+      :accept="accept"
+      @change="handleFileInput"
+    >
+    <slot>
+      <span op-70>
+        {{ title }}
+      </span>
+
+      <!-- separator -->
+      <div my-4 w-full flex items-center justify-center op-70>
+        <div class="h-1px max-w-100px flex-1 bg-gray-300 op-50" />
+        <div class="mx-2 text-gray-400">
+          or
+        </div>
+        <div class="h-1px max-w-100px flex-1 bg-gray-300 op-50" />
+      </div>
+
+      <c-button>
+        Browse files
+      </c-button>
+    </slot>
+  </div>
+</template>