feat: rework NodeJS SDK using napi (#847)

Use Napi to write a Node.js SDK that follows Polars for better
maintainability, while keeping most of the logic in Rust.

nodejs/src/table.rs

@@ -0,0 +1,81 @@
+// Copyright 2024 Lance Developers.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+use crate::query::Query;
+use arrow_ipc::writer::FileWriter;
+use napi::bindgen_prelude::*;
+use napi_derive::napi;
+use vectordb::{ipc::ipc_file_to_batches, table::Table as LanceDBTable};
+
+#[napi]
+pub struct Table {
+    pub(crate) table: LanceDBTable,
+}
+
+#[napi]
+impl Table {
+    pub(crate) fn new(table: LanceDBTable) -> Self {
+        Self { table }
+    }
+
+    /// Return Schema as empty Arrow IPC file.
+    #[napi]
+    pub fn schema(&self) -> napi::Result<Buffer> {
+        let mut writer = FileWriter::try_new(vec![], &self.table.schema())
+            .map_err(|e| napi::Error::from_reason(format!("Failed to create IPC file: {}", e)))?;
+        writer
+            .finish()
+            .map_err(|e| napi::Error::from_reason(format!("Failed to finish IPC file: {}", e)))?;
+        Ok(Buffer::from(writer.into_inner().map_err(|e| {
+            napi::Error::from_reason(format!("Failed to get IPC file: {}", e))
+        })?))
+    }
+
+    #[napi]
+    pub async unsafe fn add(&mut self, buf: Buffer) -> napi::Result<()> {
+        let batches = ipc_file_to_batches(buf.to_vec())
+            .map_err(|e| napi::Error::from_reason(format!("Failed to read IPC file: {}", e)))?;
+        self.table.add(batches, None).await.map_err(|e| {
+            napi::Error::from_reason(format!(
+                "Failed to add batches to table {}: {}",
+                self.table, e
+            ))
+        })
+    }
+
+    #[napi]
+    pub async fn count_rows(&self) -> napi::Result<usize> {
+        self.table.count_rows().await.map_err(|e| {
+            napi::Error::from_reason(format!(
+                "Failed to count rows in table {}: {}",
+                self.table, e
+            ))
+        })
+    }
+
+    #[napi]
+    pub async unsafe fn delete(&mut self, predicate: String) -> napi::Result<()> {
+        self.table.delete(&predicate).await.map_err(|e| {
+            napi::Error::from_reason(format!(
+                "Failed to delete rows in table {}: predicate={}",
+                self.table, e
+            ))
+        })
+    }
+
+    #[napi]
+    pub fn query(&self) -> Query {
+        Query::new(self)
+    }
+}