osiris/REFACTORING_COMPLETE.md

# OSIRIS Refactoring Complete! 🎉

## Summary

Successfully refactored OSIRIS with:
1. ✅ **Builder Pattern** for `OsirisContext`
2. ✅ **Type Registry** for custom struct registration
3. ✅ **Engine Module** moved to `rhai` module
4. ✅ **Simplified Runner** using the new architecture

---

## 1. Builder Pattern

### Before:
```rust
OsirisContext::new_with_registry(name, owner, url, db_id, registry)
```

### After:
```rust
let ctx = OsirisContext::builder()
    .name("my_context")
    .owner("user_123")
    .herodb_url("redis://localhost:6379")
    .db_id(1)
    .registry(registry)  // Optional
    .build()?;
```

**Benefits:**
- Fluent, readable API
- Optional parameters
- Type-safe construction
- Backward compatible with `OsirisContext::new()`

---

## 2. Type Registry

### Architecture:
```rust
// 1. Create registry
let registry = TypeRegistry::new();

// 2. Register types (one line per type!)
registry.register_type::<Resident>("residents")?;
registry.register_type::<Company>("companies")?;
registry.register_type::<Invoice>("invoices")?;

// 3. Create context with registry
let ctx = OsirisContext::builder()
    .name("zdfz")
    .owner("admin")
    .herodb_url(url)
    .db_id(1)
    .registry(Arc::new(registry))
    .build()?;

// 4. Save uses the correct type automatically!
ctx.save("residents", "id123", resident_data)?;  // Uses Resident type
ctx.save("companies", "id456", company_data)?;   // Uses Company type
```

### How It Works:
1. **Registry maps collection → type**
2. **Single `save()` function** looks up the type
3. **Deserializes JSON** to the correct Rust struct
4. **Calls `store.put()`** with typed object
5. **Proper indexing** happens via `index_keys()` method

**No callbacks, no multiple functions - just ONE save function!** 🎯

---

## 3. Engine Module

### Moved from:
```
src/bin/runner/engine.rs
```

### To:
```
src/rhai/engine.rs
```

### New API:
```rust
use osiris::rhai::{
    OsirisEngineConfig,
    create_osiris_engine,
    create_osiris_engine_with_config,
    create_osiris_engine,
};

// Simple engine
let (engine, scope) = create_osiris_engine("owner", "redis://localhost:6379", 1)?;

// With config
let mut config = OsirisEngineConfig::new();
config.add_context("ctx1", "owner1", "redis://localhost:6379", 1);
config.add_context("ctx2", "owner2", "redis://localhost:6379", 2);
let (engine, scope) = create_osiris_engine_with_config(config)?;

// With context manager (dynamic contexts)
let engine = create_osiris_engine("redis://localhost:6379", 1)?;
```

---

## 4. Simplified Runner

### New Structure:
```
src/bin/runner.rs  (single file!)
```

### Usage:
```bash
# Run a script
cargo run --bin runner --features rhai-support -- runner1 \
  --script "ctx.save('residents', 'id123', data);"

# With custom contexts
cargo run --bin runner --features rhai-support -- runner1 \
  --instance freezone:redis://localhost:6379:1 \
  --instance backup:redis://localhost:6379:2 \
  --script "freezone.save('residents', 'id123', data);"
```

---

## File Structure

```
osiris/src/
├── rhai/
│   ├── mod.rs           # Exports
│   ├── instance.rs      # OsirisContext + Builder + ContextManager
│   └── engine.rs        # Engine creation functions
├── store/
│   ├── mod.rs
│   ├── generic_store.rs
│   └── type_registry.rs # Type registry for custom structs
└── bin/
    └── runner.rs        # Simplified runner binary
```

---

## Exports

From `osiris::rhai`:
- `OsirisContext` - Main context type
- `OsirisContextBuilder` - Builder for contexts
- `OsirisInstance` - Alias for backward compatibility
- `ContextManager` - Multi-tenant manager
- `Privilege`, `Member` - Access control types
- `OsirisEngineConfig` - Engine configuration
- `create_osiris_engine()` - Engine creation functions
- `register_context_api()` - Register context API in engine

From `osiris::store`:
- `TypeRegistry` - Type registry for custom structs
- `GenericStore` - Generic storage layer
- `Object`, `Storable` - Traits

---

## Usage in ZDFZ API

```rust
use osiris::rhai::{OsirisContext, OsirisEngineConfig, create_osiris_engine_with_config};
use osiris::store::TypeRegistry;
use std::sync::Arc;

// 1. Create type registry
let registry = TypeRegistry::new();
registry.register_type::<DigitalResident>("residents")?;
registry.register_type::<FreezoneCompany>("companies")?;
registry.register_type::<Invoice>("invoices")?;
let registry = Arc::new(registry);

// 2. Create engine config
let mut config = OsirisEngineConfig::new();
config.add_context("zdfz", "admin", "redis://localhost:6379", 1);

// 3. Create engine
let (mut engine, scope) = create_osiris_engine_with_config(config)?;

// 4. Register ZDFZ DSL functions
register_resident_api(&mut engine);
register_company_api(&mut engine);
register_invoice_api(&mut engine);

// 5. Run scripts!
engine.eval_with_scope(&mut scope, r#"
    let resident = create_resident(#{
        email: "test@example.com",
        first_name: "John"
    });
    
    zdfz.save("residents", resident.id, resident);
"#)?;
```

---

## Benefits

✅ **Clean API** - Builder pattern for context creation
✅ **Type-Safe** - Registry ensures correct types are used
✅ **Flexible** - Applications register their own types
✅ **Proper Indexing** - Each type's `index_keys()` is called
✅ **Organized** - Engine in rhai module where it belongs
✅ **Simple Runner** - Single file, uses library code

---

**Status:** All refactoring complete and ready for use! 🚀