feat(myopencre): add CSV upload UI and wire to existing import endpoint

Author: PRAteek-singHWY

application/frontend/src/pages/MyOpenCRE/MyOpenCRE.scss

@@ -0,0 +1,11 @@
+.myopencre-section {
+  margin-top: 2rem;
+}
+
+.myopencre-upload {
+  margin-top: 1.5rem;
+}
+
+.myopencre-disabled {
+  opacity: 0.7;
+}

application/frontend/src/pages/MyOpenCRE/MyOpenCRE.tsx

@@ -1,23 +1,28 @@
-import React from 'react';
-import { Button, Container, Header } from 'semantic-ui-react';
+import './MyOpenCRE.scss';
+
+import React, { useState } from 'react';
+import { Button, Container, Form, Header, Message } from 'semantic-ui-react';
 
 import { useEnvironment } from '../../hooks';
 
 export const MyOpenCRE = () => {
   const { apiUrl } = useEnvironment();
-  // console.log('API URL:', apiUrl);
 
-  const downloadCreCsv = async () => {
-    try {
-      const baseUrl = apiUrl || window.location.origin;
+  // Upload enabled only for local/dev
+  const isUploadEnabled = apiUrl !== '/rest/v1';
 
-      const backendUrl = baseUrl.includes('localhost') ? 'http://127.0.0.1:5000' : baseUrl;
+  const [selectedFile, setSelectedFile] = useState<File | null>(null);
+  const [loading, setLoading] = useState(false);
+  const [error, setError] = useState<string | null>(null);
+  const [success, setSuccess] = useState<any | null>(null);
 
-      const response = await fetch(`${backendUrl}/cre_csv`, {
+  /* ------------------ CSV DOWNLOAD ------------------ */
+
+  const downloadCreCsv = async () => {
+    try {
+      const response = await fetch(`${apiUrl}/cre_csv`, {
         method: 'GET',
-        headers: {
-          Accept: 'text/csv',
-        },
+        headers: { Accept: 'text/csv' },
       });
 
       if (!response.ok) {
@@ -41,6 +46,67 @@ export const MyOpenCRE = () => {
     }
   };
 
+  /* ------------------ FILE SELECTION ------------------ */
+
+  const onFileChange = (e: React.ChangeEvent<HTMLInputElement>) => {
+    setError(null);
+    setSuccess(null);
+
+    if (!e.target.files || e.target.files.length === 0) return;
+
+    const file = e.target.files[0];
+
+    if (!file.name.toLowerCase().endsWith('.csv')) {
+      setError('Please upload a valid CSV file.');
+      e.target.value = '';
+      setSelectedFile(null);
+      return;
+    }
+
+    setSelectedFile(file);
+  };
+
+  /* ------------------ CSV UPLOAD ------------------ */
+
+  const uploadCsv = async () => {
+    if (!selectedFile) return;
+
+    setLoading(true);
+    setError(null);
+    setSuccess(null);
+
+    const formData = new FormData();
+    formData.append('cre_csv', selectedFile);
+
+    try {
+      const response = await fetch(`${apiUrl}/cre_csv_import`, {
+        method: 'POST',
+        body: formData,
+      });
+
+      if (response.status === 403) {
+        throw new Error(
+          'CSV import is disabled on hosted environments. Run OpenCRE locally with CRE_ALLOW_IMPORT=true.'
+        );
+      }
+
+      if (!response.ok) {
+        const text = await response.text();
+        throw new Error(text || 'CSV import failed');
+      }
+
+      const result = await response.json();
+      setSuccess(result);
+      setSelectedFile(null);
+    } catch (err: any) {
+      setError(err.message || 'Unexpected error during import');
+    } finally {
+      setLoading(false);
+    }
+  };
+
+  /* ------------------ UI ------------------ */
+
   return (
     <Container style={{ marginTop: '3rem' }}>
       <Header as="h1">MyOpenCRE</Header>
@@ -51,13 +117,56 @@ export const MyOpenCRE = () => {
       </p>
 
       <p>
-        Start by downloading the mapping template below, fill it with your standard’s controls, and map them
-        to CRE IDs.
+        Start by downloading the CRE catalogue below, then map your standard’s controls or sections to CRE IDs
+        in the spreadsheet.
       </p>
 
-      <Button primary onClick={downloadCreCsv}>
-        Download CRE Catalogue (CSV)
-      </Button>
+      <div className="myopencre-section">
+        <Button primary onClick={downloadCreCsv}>
+          Download CRE Catalogue (CSV)
+        </Button>
+      </div>
+
+      <div className="myopencre-section myopencre-upload">
+        <Header as="h3">Upload Mapping CSV</Header>
+
+        <p>Upload your completed mapping spreadsheet to import your standard into OpenCRE.</p>
+
+        {!isUploadEnabled && (
+          <Message info className="myopencre-disabled">
+            CSV upload is disabled on hosted environments due to resource constraints.
+            <br />
+            Please run OpenCRE locally to enable standard imports.
+          </Message>
+        )}
+
+        {error && <Message negative>{error}</Message>}
+
+        {success && (
+          <Message positive>
+            <strong>Import successful</strong>
+            <ul>
+              <li>New CREs added: {success.new_cres?.length ?? 0}</li>
+              <li>Standards imported: {success.new_standards}</li>
+            </ul>
+          </Message>
+        )}
+
+        <Form>
+          <Form.Field>
+            <input type="file" accept=".csv" disabled={!isUploadEnabled || loading} onChange={onFileChange} />
+          </Form.Field>
+
+          <Button
+            primary
+            loading={loading}
+            disabled={!isUploadEnabled || !selectedFile || loading}
+            onClick={uploadCsv}
+          >
+            Upload CSV
+          </Button>
+        </Form>
+      </div>
     </Container>
   );
 };