Luke Street 0fccae1049 Add experimental wasm bindings
Published to npm as objdiff-wasm
2024-08-20 21:40:32 -06:00

54 lines
2.0 KiB
Rust

use anyhow::Context;
use prost::Message;
use wasm_bindgen::prelude::*;
use crate::{bindings::diff::DiffResult, diff, obj};
#[wasm_bindgen]
pub fn run_diff(
left: Option<Box<[u8]>>,
right: Option<Box<[u8]>>,
config: diff::DiffObjConfig,
) -> Result<String, JsError> {
let target = left
.as_ref()
.map(|data| obj::read::parse(data, &config).context("Loading target"))
.transpose()
.map_err(|e| JsError::new(&e.to_string()))?;
let base = right
.as_ref()
.map(|data| obj::read::parse(data, &config).context("Loading base"))
.transpose()
.map_err(|e| JsError::new(&e.to_string()))?;
let result = diff::diff_objs(&config, target.as_ref(), base.as_ref(), None)
.map_err(|e| JsError::new(&e.to_string()))?;
let left = target.as_ref().and_then(|o| result.left.as_ref().map(|d| (o, d)));
let right = base.as_ref().and_then(|o| result.right.as_ref().map(|d| (o, d)));
let out = DiffResult::new(left, right);
serde_json::to_string(&out).map_err(|e| JsError::new(&e.to_string()))
}
#[wasm_bindgen]
pub fn run_diff_proto(
left: Option<Box<[u8]>>,
right: Option<Box<[u8]>>,
config: diff::DiffObjConfig,
) -> Result<Box<[u8]>, JsError> {
let target = left
.as_ref()
.map(|data| obj::read::parse(data, &config).context("Loading target"))
.transpose()
.map_err(|e| JsError::new(&e.to_string()))?;
let base = right
.as_ref()
.map(|data| obj::read::parse(data, &config).context("Loading base"))
.transpose()
.map_err(|e| JsError::new(&e.to_string()))?;
let result = diff::diff_objs(&config, target.as_ref(), base.as_ref(), None)
.map_err(|e| JsError::new(&e.to_string()))?;
let left = target.as_ref().and_then(|o| result.left.as_ref().map(|d| (o, d)));
let right = base.as_ref().and_then(|o| result.right.as_ref().map(|d| (o, d)));
let out = DiffResult::new(left, right);
Ok(out.encode_to_vec().into_boxed_slice())
}