Restructure omni services and add Chatwoot research snapshot

research/chatwoot/app/javascript/shared/helpers/FileHelper.js

@@ -0,0 +1,89 @@
+import { getAllowedFileTypesByChannel } from '@chatwoot/utils';
+import { INBOX_TYPES } from 'dashboard/helper/inbox';
+import { ALLOWED_FILE_TYPES } from 'shared/constants/messages';
+
+export const DEFAULT_MAXIMUM_FILE_UPLOAD_SIZE = 40;
+
+export const formatBytes = (bytes, decimals = 2) => {
+  if (bytes === 0) return '0 Bytes';
+
+  const k = 1024;
+  const dm = decimals < 0 ? 0 : decimals;
+  const sizes = ['Bytes', 'KB', 'MB', 'GB', 'TB', 'PB', 'EB', 'ZB', 'YB'];
+
+  const i = Math.floor(Math.log(bytes) / Math.log(k));
+
+  return parseFloat((bytes / k ** i).toFixed(dm)) + ' ' + sizes[i];
+};
+
+export const fileSizeInMegaBytes = bytes => {
+  return bytes / (1024 * 1024);
+};
+
+export const checkFileSizeLimit = (file, maximumUploadLimit) => {
+  const fileSize = file?.file?.size || file?.size;
+  const fileSizeInMB = fileSizeInMegaBytes(fileSize);
+  return fileSizeInMB <= maximumUploadLimit;
+};
+
+export const resolveMaximumFileUploadSize = value => {
+  const parsedValue = Number(value);
+
+  if (!Number.isFinite(parsedValue) || parsedValue <= 0) {
+    return DEFAULT_MAXIMUM_FILE_UPLOAD_SIZE;
+  }
+
+  return parsedValue;
+};
+
+/**
+ * Validates if a file type is allowed for a specific channel
+ * @param {File} file - The file to validate
+ * @param {Object} options - Validation options
+ * @param {string} options.channelType - The channel type
+ * @param {string} options.medium - The channel medium
+ * @param {string} options.conversationType - The conversation type (for Instagram DM detection)
+ * @param {boolean} options.isInstagramChannel - Whether it's an Instagram channel
+ * @param {boolean} options.isOnPrivateNote - Whether composing a private note (uses broader file type list)
+ * @returns {boolean} - True if file type is allowed, false otherwise
+ */
+export const isFileTypeAllowedForChannel = (file, options = {}) => {
+  if (!file || file.size === 0) return false;
+
+  const {
+    channelType: originalChannelType,
+    medium,
+    conversationType,
+    isInstagramChannel,
+    isOnPrivateNote,
+  } = options;
+
+  // Use broader file types for private notes (matches file picker behavior)
+  const allowedFileTypes = isOnPrivateNote
+    ? ALLOWED_FILE_TYPES
+    : getAllowedFileTypesByChannel({
+        channelType:
+          isInstagramChannel || conversationType === 'instagram_direct_message'
+            ? INBOX_TYPES.INSTAGRAM
+            : originalChannelType,
+        medium,
+      });
+
+  // Convert to array and validate
+  const allowedTypesArray = allowedFileTypes.split(',').map(t => t.trim());
+  const fileExtension = `.${file.name.split('.').pop()}`;
+
+  return allowedTypesArray.some(allowedType => {
+    // Check for exact file extension match
+    if (allowedType === fileExtension) return true;
+
+    // Check for wildcard MIME type (e.g., image/*)
+    if (allowedType.endsWith('/*')) {
+      const prefix = allowedType.slice(0, -2); // Remove '/*'
+      return file.type.startsWith(prefix + '/');
+    }
+
+    // Check for exact MIME type match
+    return allowedType === file.type;
+  });
+};