# ruvector-wasm Integration Status

## Summary

The ruvector-wasm crate has been updated to integrate ruvector-collections and ruvector-filter functionality. However, compilation is currently blocked by pre-existing issues in ruvector-core.

## Changes Made

### 1. Cargo.toml Updates

#### Added Dependencies:
```toml
ruvector-collections = { path = "../ruvector-collections", optional = true }
ruvector-filter = { path = "../ruvector-filter", optional = true }
getrandom02 = { package = "getrandom", version = "0.2", features = ["js"] }
```

#### Added Features:
```toml
[features]
collections = ["dep:ruvector-collections", "dep:ruvector-filter"]
```

#### WASM Configuration:
```toml
[target.'cfg(target_arch = "wasm32")'.dependencies]
getrandom = { workspace = true, features = ["wasm_js"] }
```

### 2. src/lib.rs Updates

#### Added CollectionManager (Lines 411-587):
- `new(base_path: Option<String>)` - Create collection manager
- `create_collection(name, dimensions, metric)` - Create new collection
- `list_collections()` - List all collections
- `delete_collection(name)` - Delete a collection
- `get_collection(name)` - Get collection's VectorDB
- `create_alias(alias, collection)` - Create an alias
- `delete_alias(alias)` - Delete an alias
- `list_aliases()` - List all aliases

#### Added FilterBuilder (Lines 591-799):
- `eq(field, value)` - Equality filter
- `ne(field, value)` - Not-equal filter
- `gt(field, value)` - Greater-than filter
- `gte(field, value)` - Greater-than-or-equal filter
- `lt(field, value)` - Less-than filter
- `lte(field, value)` - Less-than-or-equal filter
- `in_values(field, values)` - IN filter
- `match_text(field, text)` - Text match filter
- `geo_radius(field, lat, lon, radius_m)` - Geo radius filter
- `and(filters)` - AND combinator
- `or(filters)` - OR combinator
- `not(filter)` - NOT combinator
- `exists(field)` - Field exists filter
- `is_null(field)` - Field is null filter
- `to_json()` - Convert to JavaScript object
- `get_fields()` - Get referenced field names

## Current Issues

### Compilation Blockers

The ruvector-core crate has conditional compilation issues that prevent WASM builds:

1. **redb dependency**: Code in `error.rs` uses `redb` types without `#[cfg(feature = "storage")]` guards
2. **hnsw_rs dependency**: Code in `index/hnsw.rs` uses `hnsw_rs` without `#[cfg(feature = "hnsw")]` guards
3. **uuid dependency**: Some code uses `uuid::Uuid` without proper feature guards

### Architectural Limitations

**Collections and Filter in WASM**: The ruvector-collections crate relies on file I/O and memory-mapped files (via mmap-rs), which are not available in browser WASM environments. These features are marked as optional and require the `collections` feature to be enabled.

## Usage

### Standard WASM Build (Browser):
```bash
cd crates/ruvector-wasm
cargo build --target wasm32-unknown-unknown --release
```

This builds only the core VectorDB functionality without collections or filter support.

### WASM with Collections (WASI/Server):
```bash
cargo build --target wasm32-unknown-unknown --release --features collections
```

**Note**: This requires a WASM runtime with file system support (e.g., WASI) and will not work in browsers.

## JavaScript API Examples

### CollectionManager:
```javascript
import { CollectionManager } from 'ruvector-wasm';

// Create manager
const manager = new CollectionManager();

// Create collection
manager.createCollection("documents", 384, "cosine");

// List collections
const collections = manager.listCollections();

// Create alias
manager.createAlias("current_docs", "documents");

// Get collection
const db = manager.getCollection("current_docs");

// Use the VectorDB
const id = db.insert(vector, "doc1", { title: "Hello" });
```

### FilterBuilder:
```javascript
import { FilterBuilder } from 'ruvector-wasm';

// Simple equality filter
const filter1 = FilterBuilder.eq("status", "active");

// Complex filter
const filter2 = FilterBuilder.and([
  FilterBuilder.eq("status", "active"),
  FilterBuilder.or([
    FilterBuilder.gte("age", 18),
    FilterBuilder.lt("priority", 10)
  ])
]);

// Geo filter
const filter3 = FilterBuilder.geoRadius(
  "location",
  40.7128,  // latitude
  -74.0060,  // longitude
  1000      // radius in meters
);

// Convert to JSON for use with search
const filterJson = filter.toJson();
const results = db.search(queryVector, 10, filterJson);
```

## Required Fixes

To make this fully functional, the following changes are needed in ruvector-core:

### 1. Add cfg guards to error.rs:
```rust
#[cfg(feature = "storage")]
impl From<redb::Error> for RuvectorError {
    // ...
}
```

### 2. Add cfg guards to index/hnsw.rs:
```rust
#[cfg(feature = "hnsw")]
use hnsw_rs::prelude::*;

#[cfg(feature = "hnsw")]
pub struct HnswIndex {
    // ...
}
```

### 3. Ensure memory-only feature works:
The `memory-only` feature should be a complete alternative that doesn't require redb or hnsw_rs.

## Files Modified

1. `/home/user/ruvector/crates/ruvector-wasm/Cargo.toml`
2. `/home/user/ruvector/crates/ruvector-wasm/src/lib.rs`
3. `/home/user/ruvector/Cargo.toml` (attempted patch section, later removed)

## Verification

Once ruvector-core's conditional compilation issues are fixed, verify with:

```bash
# Check basic WASM build
cargo check --target wasm32-unknown-unknown

# Check with collections feature (requires WASI)
cargo check --target wasm32-unknown-unknown --features collections

# Build release
cargo build --target wasm32-unknown-unknown --release

# Run WASM tests
wasm-pack test --node
```

## Next Steps

1. Fix ruvector-core conditional compilation issues
2. Add proper cfg guards for all optional dependencies
3. Test WASM builds with and without collections feature
4. Add WASM-specific tests for CollectionManager and FilterBuilder
5. Document WASI requirements for collections feature
6. Consider creating a pure in-memory alternative to collections for browser use