# Gravity Forms Redsys Integration

- [x] Project Setup <!-- id: 0 -->
    - [x] Initialize project structure (`task.md`, `implementation_plan.md`) <!-- id: 1 -->
    - [x] Create plugin directory and main file <!-- id: 2 -->
- [x] Core Implementation <!-- id: 3 -->
    - [x] Implement `Redsys_API` class (Signature, Parameters) <!-- id: 4 -->
    - [x] Implement `GF_Redsys` class (Extends `GFPaymentAddOn`) <!-- id: 5 -->
        - [x] Config fields (Merchant, Terminal, Secret, Env) <!-- id: 6 -->
        - [x] Field mapping (Amount, Order ID) <!-- id: 7 -->
        - [x] Payment redirect logic <!-- id: 8 -->
        - [x] IPN/Callback handling <!-- id: 9 -->
    - [x] Implement `Redsys_Quick_Pay` class (Shortcode) <!-- id: 10 -->
        - [x] Shortcode `[redsys_quick_pay]` logic <!-- id: 11 -->
        - [x] Simple form generation <!-- id: 12 -->
        - [x] Processing logic for simple form <!-- id: 13 -->
- [x] Advanced Features (Synced from T: Drive) <!-- id: 17 -->
    - [x] Implement Custom Redsys Field (`GF_Field_Redsys`) <!-- id: 18 -->
    - [x] Implement Modal Redirection (JS/CSS) <!-- id: 19 -->
    - [x] Security Enhancements (Order ID 12 chars, 3DES Fix) <!-- id: 20 -->
- [ ] Verification <!-- id: 14 -->
    - [x] Verify file structure <!-- id: 15 -->
    - [x] Lint/Syntax check (manual review of generated code) <!-- id: 16 -->