## Description
This implementation adds support for the `media_name` parameter for
WhatsApp document templates, resolving the issue where documents appear
as "untitled" when sent via templates.
**Problem solved:** Documents sent via WhatsApp templates always
appeared as "untitled" because Chatwoot didn't process the `filename`
field required by the WhatsApp API.
**Solution:** Added support for the `media_name` parameter that maps to
the WhatsApp API's `filename` field.
## Type of change
- [x] New feature (non-breaking change which adds functionality)
- [x] This change requires a documentation update
## How Has This Been Tested?
Created and executed **7 comprehensive test scenarios**:
1. ✅ Document without `media_name` (backward compatibility)
2. ✅ Document with valid `media_name`
3. ✅ Document with blank `media_name`
4. ✅ Document with null `media_name`
5. ✅ Image with `media_name` (ignored as expected)
6. ✅ Video with `media_name` (ignored as expected)
7. ✅ Blank URL (returns nil appropriately)
**All tests passed** and confirmed **100% backward compatibility**.
## Technical Implementation
**Backend Changes:**
- `PopulateTemplateParametersService`: Added `media_name` parameter
support
- `TemplateProcessorService`: Pass `media_name` to parameter builder
- `WhatsappCloudService`: Updated documentation with `media_name`
example
**Frontend Changes:**
- `WhatsAppTemplateParser.vue`: Added UI field for document filename
input
- `templateHelper.js`: Include `media_name` for document templates
- `whatsappTemplates.json`: Added translation key for document name
placeholder
**Key Features:**
- 🔄 **100% Backward Compatible** - Existing templates continue working
- 📝 **Document Filename Support** - Users can specify custom filenames
- 🎯 **Document-Only Feature** - Only affects document media types
- ✅ **Comprehensive Testing** - All edge cases covered
## Expected Behavior
**Before:**
```ruby
# All documents appear as "untitled"
{
type: 'document',
document: { link: 'https://example.com/document.pdf' }
}
```
**After:**
```ruby
# With media_name - displays custom filename
{
type: 'document',
document: {
link: 'https://example.com/document.pdf',
filename: 'Invoice_2025.pdf'
}
}
# Without media_name - works as before
{
type: 'document',
document: { link: 'https://example.com/document.pdf' }
}
```
## Checklist:
- [x] My code follows the style guidelines of this project
- [x] I have performed a self-review of my code
- [x] I have commented on my code, particularly in hard-to-understand
areas
- [x] I have made corresponding changes to the documentation
- [x] My changes generate no new warnings
- [x] I have added tests that prove my fix is effective or that my
feature works
- [x] New and existing unit tests pass locally with my changes
- [x] Any dependent changes have been merged and published in downstream
modules
Co-authored-by: Muhsin Keloth <muhsinkeramam@gmail.com>
