patch_base_js.diff

--- templates/base.html	2023-10-25 15:01:00.000000000 -0400
+++ templates/base.html	2023-10-25 15:02:00.000000000 -0400
@@ -321,14 +321,79 @@
             $('#id_arguments').select2({ placeholder: 'Select arguments', allowClear: true });

+            let currentRollOptions = null;
+
+            async function calculateSHA256(file) {
+                const arrayBuffer = await file.arrayBuffer();
+                const hashBuffer = await crypto.subtle.digest('SHA-256', arrayBuffer);
+                const hashArray = Array.from(new Uint8Array(hashBuffer));
+                const hashHex = hashArray.map(b => b.toString(16).padStart(2, '0')).join('');
+                return hashHex.toUpperCase();
+            }
+
+            $('#rom-validation-submit').on('click', async function() {
+                const fileInput = document.getElementById('rom-validation-file');
+                const errorDiv = document.getElementById('rom-validation-error');
+                const rememberCheckbox = document.getElementById('remember-rom-validation');
+
+                if (!fileInput.files || fileInput.files.length === 0) {
+                    errorDiv.innerText = "Please select a ROM file.";
+                    errorDiv.style.display = 'block';
+                    return;
+                }
+
+                const file = fileInput.files[0];
+                errorDiv.style.display = 'none';
+                $(this).prop('disabled', true).text('Validating...');
+
+                try {
+                    const hash = await calculateSHA256(file);
+                    const validHashes = [
+                        '0F51B4FCA41B7FD509E4B8F9D543151F68EFA5E97B08493E4B2A0C06F5D8D5E2', // Unheadered
+                        '60F6F506F928A6D3A6F1D0E43E5101E689C8F5B191B93F7159986326E1E909B1'  // Headered
+                    ];
+
+                    if (validHashes.includes(hash)) {
+                        if (rememberCheckbox.checked) {
+                            localStorage.setItem('romValidated', 'true');
+                        }
+                        closeModal('rom-validation-modal');
+                        if (currentRollOptions) {
+                            initiateTaskAndPoll(currentRollOptions);
+                        }
+                    } else {
+                        errorDiv.innerText = "Invalid ROM file. The sha256 value does not match the expected value.";
+                        errorDiv.style.display = 'block';
+                    }
+                } catch (error) {
+                    errorDiv.innerText = "Error reading or validating the file. Please try again.";
+                    errorDiv.style.display = 'block';
+                    console.error("ROM validation error:", error);
+                } finally {
+                    $(this).prop('disabled', false).text('Validate and Roll');
+                }
+            });
+
             $(document).on('click', '.js-roll-seed-dispatcher', function() {
                 const button = $(this);
                 const randomLine = SILLY_THINGS.length > 0 ? SILLY_THINGS[Math.floor(Math.random() * SILLY_THINGS.length)] : "Rolling your seed...";

-                initiateTaskAndPoll({
-                    dispatcherUrl: button.data('url'),
-                    statusUrlBase: button.data('status-url-base'),
-                    modalTitle: 'Rolling Seed...',
-                    modalMessage: randomLine.charAt(0).toUpperCase() + randomLine.slice(1),
-                });
+                currentRollOptions = {
+                    dispatcherUrl: button.data('url'),
+                    statusUrlBase: button.data('status-url-base'),
+                    modalTitle: 'Rolling Seed...',
+                    modalMessage: randomLine.charAt(0).toUpperCase() + randomLine.slice(1),
+                };
+
+                const isValidated = localStorage.getItem('romValidated') === 'true';
+
+                if (isValidated) {
+                    initiateTaskAndPoll(currentRollOptions);
+                } else {
+                    // Reset the form
+                    $('#rom-validation-file').val('');
+                    $('#rom-validation-error').hide();
+                    openModal('rom-validation-modal');
+                }
             });

             $(document).on('click', '.js-feature-btn', function() {