Add singleFileSelection to uploadDropzone.vue

Add support for single file handling to the upload
dropzone component.

app/assets/javascripts/vue_shared/components/upload_dropzone/upload_dropzone.vue

@@ -36,6 +36,11 @@ export default {
       required: false,
       default: () => [VALID_IMAGE_FILE_MIMETYPE.mimetype],
     },
+    singleFileSelection: {
+      type: Boolean,
+      required: false,
+      default: false,
+    },
   },
   data() {
     return {
@@ -79,7 +84,7 @@ export default {
         return;
       }
 
-      this.$emit('change', files);
+      this.$emit('change', this.singleFileSelection ? files[0] : files);
     },
     ondragenter(e) {
       this.dragCounter += 1;
@@ -92,7 +97,7 @@ export default {
       this.$refs.fileUpload.click();
     },
     onFileInputChange(e) {
-      this.$emit('change', e.target.files);
+      this.$emit('change', this.singleFileSelection ? e.target.files[0] : e.target.files);
     },
   },
 };
@@ -119,9 +124,15 @@ export default {
           data-testid="dropzone-area"
         >
           <gl-icon name="upload" :size="iconStyles.size" :class="iconStyles.class" />
-          <p class="gl-mb-0">
+          <p class="gl-mb-0" data-testid="upload-text">
             <slot name="upload-text" :openFileUpload="openFileUpload">
-              <gl-sprintf :message="__('Drop or %{linkStart}upload%{linkEnd} files to attach')">
+              <gl-sprintf
+                :message="
+                  singleFileSelection
+                    ? __('Drop or %{linkStart}upload%{linkEnd} file to attach')
+                    : __('Drop or %{linkStart}upload%{linkEnd} files to attach')
+                "
+              >
                 <template #link="{ content }">
                   <gl-link @click.stop="openFileUpload">
                     {{ content }}
@@ -139,7 +150,7 @@ export default {
         name="upload_file"
         :accept="validFileMimetypes"
         class="hide"
-        multiple
+        :multiple="!singleFileSelection"
         @change="onFileInputChange"
       />
     </slot>

locale/gitlab.pot

@@ -10709,6 +10709,9 @@ msgstr ""
 msgid "Drop or %{linkStart}upload%{linkEnd} designs to attach"
 msgstr ""
 
+msgid "Drop or %{linkStart}upload%{linkEnd} file to attach"
+msgstr ""
+
 msgid "Drop or %{linkStart}upload%{linkEnd} files to attach"
 msgstr ""
 

spec/frontend/vue_shared/components/upload_dropzone/__snapshots__/upload_dropzone_spec.js.snap

@@ -19,6 +19,7 @@ exports[`Upload dropzone component correctly overrides description and drop mess
        
       <p
         class="gl-mb-0"
+        data-testid="upload-text"
       >
         <span>
           Test %{linkStart}description%{linkEnd} message.
@@ -98,10 +99,15 @@ exports[`Upload dropzone component when dragging renders correct template when d
        
       <p
         class="gl-mb-0"
+        data-testid="upload-text"
       >
-        <gl-sprintf-stub
-          message="Drop or %{linkStart}upload%{linkEnd} files to attach"
-        />
+        Drop or 
+        <gl-link-stub>
+          
+                  upload
+                
+        </gl-link-stub>
+         files to attach
       </p>
     </div>
   </button>
@@ -178,10 +184,15 @@ exports[`Upload dropzone component when dragging renders correct template when d
        
       <p
         class="gl-mb-0"
+        data-testid="upload-text"
       >
-        <gl-sprintf-stub
-          message="Drop or %{linkStart}upload%{linkEnd} files to attach"
-        />
+        Drop or 
+        <gl-link-stub>
+          
+                  upload
+                
+        </gl-link-stub>
+         files to attach
       </p>
     </div>
   </button>
@@ -258,10 +269,15 @@ exports[`Upload dropzone component when dragging renders correct template when d
        
       <p
         class="gl-mb-0"
+        data-testid="upload-text"
       >
-        <gl-sprintf-stub
-          message="Drop or %{linkStart}upload%{linkEnd} files to attach"
-        />
+        Drop or 
+        <gl-link-stub>
+          
+                  upload
+                
+        </gl-link-stub>
+         files to attach
       </p>
     </div>
   </button>
@@ -337,10 +353,15 @@ exports[`Upload dropzone component when dragging renders correct template when d
        
       <p
         class="gl-mb-0"
+        data-testid="upload-text"
       >
-        <gl-sprintf-stub
-          message="Drop or %{linkStart}upload%{linkEnd} files to attach"
-        />
+        Drop or 
+        <gl-link-stub>
+          
+                  upload
+                
+        </gl-link-stub>
+         files to attach
       </p>
     </div>
   </button>
@@ -416,10 +437,15 @@ exports[`Upload dropzone component when dragging renders correct template when d
        
       <p
         class="gl-mb-0"
+        data-testid="upload-text"
       >
-        <gl-sprintf-stub
-          message="Drop or %{linkStart}upload%{linkEnd} files to attach"
-        />
+        Drop or 
+        <gl-link-stub>
+          
+                  upload
+                
+        </gl-link-stub>
+         files to attach
       </p>
     </div>
   </button>
@@ -495,10 +521,15 @@ exports[`Upload dropzone component when no slot provided renders default dropzon
        
       <p
         class="gl-mb-0"
+        data-testid="upload-text"
       >
-        <gl-sprintf-stub
-          message="Drop or %{linkStart}upload%{linkEnd} files to attach"
-        />
+        Drop or 
+        <gl-link-stub>
+          
+                  upload
+                
+        </gl-link-stub>
+         files to attach
       </p>
     </div>
   </button>

spec/frontend/vue_shared/components/upload_dropzone/upload_dropzone_spec.js

-import { GlIcon } from '@gitlab/ui';
+import { GlIcon, GlSprintf } from '@gitlab/ui';
 import { shallowMount } from '@vue/test-utils';
 import UploadDropzone from '~/vue_shared/components/upload_dropzone/upload_dropzone.vue';
 
@@ -14,6 +14,7 @@ describe('Upload dropzone component', () => {
   const findDropzoneCard = () => wrapper.find('.upload-dropzone-card');
   const findDropzoneArea = () => wrapper.find('[data-testid="dropzone-area"]');
   const findIcon = () => wrapper.find(GlIcon);
+  const findUploadText = () => wrapper.find('[data-testid="upload-text"]').text();
 
   function createComponent({ slots = {}, data = {}, props = {} } = {}) {
     wrapper = shallowMount(UploadDropzone, {
@@ -22,6 +23,9 @@ describe('Upload dropzone component', () => {
         displayAsCard: true,
         ...props,
       },
+      stubs: {
+        GlSprintf,
+      },
       data() {
         return data;
       },
@@ -30,6 +34,7 @@ describe('Upload dropzone component', () => {
 
   afterEach(() => {
     wrapper.destroy();
+    wrapper = null;
   });
 
   describe('when slot provided', () => {
@@ -60,6 +65,18 @@ describe('Upload dropzone component', () => {
     });
   });
 
+  describe('upload text', () => {
+    it.each`
+      collection    | description                   | props                            | expected
+      ${'multiple'} | ${'by default'}               | ${null}                          | ${'files to attach'}
+      ${'singular'} | ${'when singleFileSelection'} | ${{ singleFileSelection: true }} | ${'file to attach'}
+    `('displays $collection version $description', ({ props, expected }) => {
+      createComponent({ props });
+
+      expect(findUploadText()).toContain(expected);
+    });
+  });
+
   describe('when dragging', () => {
     it.each`
       description                  | eventPayload
@@ -141,6 +158,21 @@ describe('Upload dropzone component', () => {
         wrapper.vm.ondrop(mockEvent);
         expect(wrapper.emitted()).not.toHaveProperty('error');
       });
+
+      describe('singleFileSelection = true', () => {
+        it('emits a single file on drop', () => {
+          createComponent({
+            data: mockData,
+            props: { singleFileSelection: true },
+          });
+
+          const mockFile = { type: 'image/jpg' };
+          const mockEvent = mockDragEvent({ files: [mockFile] });
+
+          wrapper.vm.ondrop(mockEvent);
+          expect(wrapper.emitted().change[0]).toEqual([mockFile]);
+        });
+      });
     });
   });