Merge pull request #2 from BitsHost/copilot/suggest-enhancements-for-documentation

[WIP] Suggest enhancements for project documentation

Author: BitsHost

CHANGELOG.md

@@ -1,5 +1,46 @@
 # Changelog
 
+## 1.1.0 - Enhanced Query Capabilities and Bulk Operations
+
+### New Features
+- **Advanced Filter Operators**: Support for comparison operators (eq, neq, gt, gte, lt, lte, like, in, notin, null, notnull)
+- **Field Selection**: Select specific fields in list queries using the `fields` parameter
+- **Count Endpoint**: New `count` action to get record counts with optional filtering (no pagination overhead)
+- **Bulk Operations**: 
+  - `bulk_create` - Create multiple records in a single transaction
+  - `bulk_delete` - Delete multiple records by IDs in a single query
+- **Input Validation**: Added comprehensive input validation for table names, column names, IDs, and query parameters
+- **Response Helper**: Added Response class for standardized API responses (for future use)
+- **Backward Compatibility**: Old filter format (`col:value`) still works alongside new format (`col:op:value`)
+
+### Improvements
+- Fixed SQL injection vulnerability in filter parameter by using parameterized queries with unique parameter names
+- Added Validator class for centralized input validation and sanitization
+- Improved error messages with proper HTTP status codes
+- Enhanced documentation with detailed examples of new features
+- Transaction support for bulk create operations
+
+### Filter Operators
+- `eq` - Equals
+- `neq`/`ne` - Not equals
+- `gt` - Greater than
+- `gte`/`ge` - Greater than or equal
+- `lt` - Less than
+- `lte`/`le` - Less than or equal
+- `like` - Pattern matching
+- `in` - In list (pipe-separated values)
+- `notin`/`nin` - Not in list
+- `null` - Is NULL
+- `notnull` - Is NOT NULL
+
+### Examples
+- Field selection: `/index.php?action=list&table=users&fields=id,name,email`
+- Advanced filtering: `/index.php?action=list&table=users&filter=age:gt:18,status:eq:active`
+- IN operator: `/index.php?action=list&table=orders&filter=status:in:pending|processing|shipped`
+- Count records: `/index.php?action=count&table=users&filter=status:eq:active`
+- Bulk create: `POST /index.php?action=bulk_create&table=users` with JSON array
+- Bulk delete: `POST /index.php?action=bulk_delete&table=users` with `{"ids":[1,2,3]}`
+
 ## 1.0.0
 
 - Initial release: automatic CRUD API generator for MySQL/MariaDB.