[Document Repository] Upload multiple files at once (#8289)

- <FileElement> now supports the 'multiple' attribute.
- The document_repository module has been modified to support multiple uploaded files.
- Some visual feedback has been added (error reporting + uploading status).

Resolves #8218

Author: jeffersoncasimir

jsx/Form.js

@@ -1995,7 +1995,7 @@ NumericElement.defaultProps = {
 
 /**
  * File Component
- * React wrapper for a simple or 'multiple' <select> element.
+ * React wrapper for a simple or 'multiple' <input type="file"> element.
  */
 class FileElement extends Component {
   /**
@@ -2014,8 +2014,10 @@ class FileElement extends Component {
    */
   handleChange(e) {
     // Send current file to parent component
-    const file = e.target.files[0] ? e.target.files[0] : '';
-    this.props.onUserInput(this.props.name, file);
+    const files = e.target.files
+      ? (this.props.allowMultiple ? e.target.files : e.target.files[0])
+      : '';
+    this.props.onUserInput(this.props.name, files);
   }
 
   /**
@@ -2027,14 +2029,20 @@ class FileElement extends Component {
     const required = this.props.required ? 'required' : null;
 
     let fileName = undefined;
+
     if (this.props.value) {
       switch (typeof this.props.value) {
         case 'string':
           fileName = this.props.value;
           break;
 
         case 'object':
-          fileName = this.props.value.name;
+          if (this.props.value instanceof FileList) {
+            const files = this.props.value;
+            fileName = Array.from(files).map((file) => file.name).join(', ');
+          } else {
+            fileName = this.props.value.name;
+          }
           break;
 
         default:
@@ -2106,6 +2114,7 @@ class FileElement extends Component {
     } else {
         classSz = 'col-sm-12';
     }
+
     return (
       <div className={elementClass}>
         {labelHTML}
@@ -2127,6 +2136,7 @@ class FileElement extends Component {
                   name={this.props.name}
                   onChange={this.handleChange}
                   required={required}
+                  multiple={this.props.allowMultiple}
                 />
               </div>
             </div>
@@ -2148,6 +2158,7 @@ FileElement.propTypes = {
   id: PropTypes.string,
   disabled: PropTypes.bool,
   required: PropTypes.bool,
+  allowMultiple: PropTypes.bool,
   hasError: PropTypes.bool,
   errorMessage: PropTypes.string,
   onUserInput: PropTypes.func,
@@ -2160,6 +2171,7 @@ FileElement.defaultProps = {
   id: null,
   disabled: false,
   required: false,
+  allowMultiple: false,
   hasError: false,
   errorMessage: 'The field is required!',
   onUserInput: function() {
@@ -2468,7 +2480,7 @@ class ButtonElement extends Component {
             onClick={this.handleClick}
             disabled={this.props.disabled}
           >
-            {this.props.label}
+            {this.props.disabled ? 'Uploading...' : this.props.label}
           </button>
         </div>
       </div>

modules/document_repository/css/document_repository.css

@@ -5,3 +5,9 @@
 .tool:hover + .tip {
    visibility: visible;
 }
+
+.upload-response {
+  max-height: 400px;
+  overflow-y: scroll;
+  text-align: left;
+}

modules/document_repository/jsx/uploadForm.js

@@ -8,7 +8,7 @@ import Loader from 'Loader';
  * Media Upload Form
  *
  * Fetches data from Loris backend and displays a form allowing
- * to upload a document file
+ * to upload document files
  *
  * @author Shen Wang
  * @version 1.0.0
@@ -28,10 +28,11 @@ class DocUploadForm extends Component {
       uploadResult: null,
       errorMessage: null,
       isLoaded: false,
+      uploadInProgress: false,
     };
 
     this.setFormData = this.setFormData.bind(this);
-    this.uploadFile = this.uploadFile.bind(this);
+    this.uploadFiles = this.uploadFiles.bind(this);
     this.fetchData = this.fetchData.bind(this);
   }
 
@@ -90,10 +91,10 @@ class DocUploadForm extends Component {
           <FormElement
             name="docUpload"
             fileUpload={true}
-            onSubmit={this.uploadFile}
+            onSubmit={this.uploadFiles}
             method="POST"
           >
-            <h3>Upload a file</h3><br/>
+            <h3>Upload files</h3><br/>
             <SelectElement
               name="category"
               label="Category"
@@ -145,14 +146,18 @@ class DocUploadForm extends Component {
               value={this.state.formData.comments}
             />
             <FileElement
-              name="file"
+              name="files"
               id="docUploadEl"
               onUserInput={this.setFormData}
-              label="File to upload"
+              label="File(s) to upload"
               required={true}
-              value={this.state.formData.file}
+              value={this.state.formData.files}
+              allowMultiple={true}
+            />
+            <ButtonElement
+              label="Upload File(s)"
+              disabled={this.state.uploadInProgress}
             />
-            <ButtonElement label="Upload File"/>
           </FormElement>
         </div>
       </div>
@@ -166,46 +171,81 @@ class DocUploadForm extends Component {
    */
 
   /**
-   * Upload file
+   * Upload file(s)
    */
-  uploadFile() {
+  uploadFiles() {
     // Set form data and upload the media file
-    let formData = this.state.formData;
-    let formObject = new FormData();
-    for (let key in formData) {
-      if (formData[key] !== '') {
-        formObject.append(key, formData[key]);
+    try {
+      this.setState({uploadInProgress: true});
+      let formData = this.state.formData;
+      let formObject = new FormData();
+      for (let key in formData) {
+        if (formData[key] !== '') {
+          if (key === 'files' &&
+            document.querySelector('.fileUpload').multiple) {
+              Array.from(formData[key]).forEach((file) => {
+                formObject.append('files[]', file);
+              });
+          } else {
+            formObject.append(key, formData[key]);
+          }
+        }
       }
-    }
 
-    fetch(this.props.action, {
-      method: 'POST',
-      cache: 'no-cache',
-      credentials: 'same-origin',
-      body: formObject,
-    })
-    .then((resp) => {
-      console.error(resp);
-      if (resp.ok) {
-        swal.fire('Upload Successful!', '', 'success').then((result) => {
-          if (result.value) {
-            this.setState({formData: {}});
-            this.props.refreshPage();
+      fetch(this.props.action, {
+        method: 'POST',
+        cache: 'no-cache',
+        credentials: 'same-origin',
+        body: formObject,
+      })
+        .then((resp) => {
+          if (resp.ok) {
+            resp.json().then((data) => {
+              if (data.error_count === 0) {
+                swal.fire('Upload Successful!', '', 'success')
+                  .then((result) => {
+                    if (result.value) {
+                      this.setState({formData: {}});
+                      this.props.refreshPage();
+                    }
+                });
+              } else {
+                console.error(resp);
+                swal.fire('Upload Incomplete', data.message, 'warning');
+              }
+            }).catch((error) => {
+              console.error(error);
+              swal.fire(
+                'Error reading response',
+                'Please report the issue or contact your administrator',
+                'error'
+              );
+            });
+          } else {
+            resp.json().then((data) => {
+              console.error(resp);
+              swal.fire('Could not upload files', data.error, 'error');
+            }).catch((error) => {
+              console.error(error);
+              swal.fire(
+                'Error reading error response',
+                'Please report the issue or contact your administrator',
+                'error'
+              );
+            });
           }
-        });
-      } else {
-        resp.json().then((data) => {
-          swal.fire('Could not upload file', data.error, 'error');
         }).catch((error) => {
           console.error(error);
           swal.fire(
-            'Unknown Error',
+            'Something went wrong',
             'Please report the issue or contact your administrator',
             'error'
           );
-        });
-      }
-    });
+        }).finally(() => this.setState({uploadInProgress: false}));
+    } catch (error) {
+      console.error(error);
+      this.setState({uploadInProgress: false});
+    }
   }
 
   /**