696 lines
24 KiB
Markdown
696 lines
24 KiB
Markdown
## Automerge WASM Low Level Interface
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This is a low level automerge library written in rust exporting a javascript API via WASM. This low level api is the underpinning to the `automerge-js` library that reimplements the Automerge API via these low level functions.
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### Static Functions
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### Methods
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`doc.clone(actor?: string)` : Make a complete
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`doc.free()` : deallocate WASM memory associated with a document
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```rust
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#[wasm_bindgen]
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pub fn free(self) {}
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#[wasm_bindgen(js_name = pendingOps)]
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pub fn pending_ops(&self) -> JsValue {
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(self.0.pending_ops() as u32).into()
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}
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pub fn commit(&mut self, message: Option<String>, time: Option<f64>) -> Array {
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let heads = self.0.commit(message, time.map(|n| n as i64));
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let heads: Array = heads
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.iter()
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.map(|h| JsValue::from_str(&hex::encode(&h.0)))
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.collect();
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heads
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}
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pub fn rollback(&mut self) -> f64 {
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self.0.rollback() as f64
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}
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pub fn keys(&mut self, obj: String, heads: Option<Array>) -> Result<Array, JsValue> {
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let obj = self.import(obj)?;
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let result = if let Some(heads) = get_heads(heads) {
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self.0.keys_at(&obj, &heads)
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} else {
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self.0.keys(&obj)
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}
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.iter()
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.map(|s| JsValue::from_str(s))
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.collect();
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Ok(result)
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}
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pub fn text(&mut self, obj: String, heads: Option<Array>) -> Result<String, JsValue> {
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let obj = self.import(obj)?;
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if let Some(heads) = get_heads(heads) {
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self.0.text_at(&obj, &heads)
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} else {
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self.0.text(&obj)
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}
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.map_err(to_js_err)
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}
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pub fn splice(
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&mut self,
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obj: String,
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start: f64,
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delete_count: f64,
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text: JsValue,
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) -> Result<Option<Array>, JsValue> {
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let obj = self.import(obj)?;
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let start = start as usize;
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let delete_count = delete_count as usize;
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let mut vals = vec![];
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if let Some(t) = text.as_string() {
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self.0
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.splice_text(&obj, start, delete_count, &t)
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.map_err(to_js_err)?;
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Ok(None)
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} else {
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if let Ok(array) = text.dyn_into::<Array>() {
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for i in array.iter() {
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if let Ok(array) = i.clone().dyn_into::<Array>() {
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let value = array.get(1);
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let datatype = array.get(2);
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let value = self.import_value(value, datatype.as_string())?;
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vals.push(value);
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} else {
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let value = self.import_value(i, None)?;
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vals.push(value);
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}
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}
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}
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let result = self
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.0
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.splice(&obj, start, delete_count, vals)
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.map_err(to_js_err)?;
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if result.is_empty() {
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Ok(None)
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} else {
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let result: Array = result
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.iter()
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.map(|r| JsValue::from(r.to_string()))
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.collect();
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Ok(result.into())
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}
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}
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}
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pub fn push(
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&mut self,
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obj: String,
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value: JsValue,
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datatype: Option<String>,
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) -> Result<Option<String>, JsValue> {
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let obj = self.import(obj)?;
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let value = self.import_value(value, datatype)?;
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let index = self.0.length(&obj);
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let opid = self.0.insert(&obj, index, value).map_err(to_js_err)?;
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Ok(opid.map(|id| id.to_string()))
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}
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pub fn insert(
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&mut self,
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obj: String,
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index: f64,
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value: JsValue,
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datatype: Option<String>,
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) -> Result<Option<String>, JsValue> {
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let obj = self.import(obj)?;
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let index = index as f64;
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let value = self.import_value(value, datatype)?;
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let opid = self
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.0
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.insert(&obj, index as usize, value)
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.map_err(to_js_err)?;
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Ok(opid.map(|id| id.to_string()))
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}
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pub fn set(
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&mut self,
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obj: String,
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prop: JsValue,
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value: JsValue,
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datatype: Option<String>,
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) -> Result<Option<String>, JsValue> {
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let obj = self.import(obj)?;
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let prop = self.import_prop(prop)?;
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let value = self.import_value(value, datatype)?;
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let opid = self.0.set(&obj, prop, value).map_err(to_js_err)?;
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Ok(opid.map(|id| id.to_string()))
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}
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pub fn make(
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&mut self,
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obj: String,
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prop: JsValue,
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value: JsValue,
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) -> Result<String, JsValue> {
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let obj = self.import(obj)?;
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let prop = self.import_prop(prop)?;
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let value = self.import_value(value, None)?;
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if value.is_object() {
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let opid = self.0.set(&obj, prop, value).map_err(to_js_err)?;
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Ok(opid.unwrap().to_string())
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} else {
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Err("invalid object type".into())
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}
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}
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pub fn inc(&mut self, obj: String, prop: JsValue, value: JsValue) -> Result<(), JsValue> {
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let obj = self.import(obj)?;
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let prop = self.import_prop(prop)?;
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let value: f64 = value
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.as_f64()
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.ok_or("inc needs a numberic value")
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.map_err(to_js_err)?;
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self.0.inc(&obj, prop, value as i64).map_err(to_js_err)?;
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Ok(())
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}
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pub fn value(
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&mut self,
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obj: String,
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prop: JsValue,
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heads: Option<Array>,
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) -> Result<Array, JsValue> {
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let obj = self.import(obj)?;
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let result = Array::new();
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let prop = to_prop(prop);
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let heads = get_heads(heads);
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if let Ok(prop) = prop {
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let value = if let Some(h) = heads {
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self.0.value_at(&obj, prop, &h)
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} else {
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self.0.value(&obj, prop)
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}
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.map_err(to_js_err)?;
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match value {
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Some((Value::Object(obj_type), obj_id)) => {
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result.push(&obj_type.to_string().into());
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result.push(&obj_id.to_string().into());
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}
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Some((Value::Scalar(value), _)) => {
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result.push(&datatype(&value).into());
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result.push(&ScalarValue(value).into());
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}
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None => {}
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}
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}
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Ok(result)
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}
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pub fn values(
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&mut self,
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obj: String,
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arg: JsValue,
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heads: Option<Array>,
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) -> Result<Array, JsValue> {
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let obj = self.import(obj)?;
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let result = Array::new();
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let prop = to_prop(arg);
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if let Ok(prop) = prop {
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let values = if let Some(heads) = get_heads(heads) {
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self.0.values_at(&obj, prop, &heads)
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} else {
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self.0.values(&obj, prop)
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}
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.map_err(to_js_err)?;
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for value in values {
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match value {
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(Value::Object(obj_type), obj_id) => {
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let sub = Array::new();
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sub.push(&obj_type.to_string().into());
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sub.push(&obj_id.to_string().into());
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result.push(&sub.into());
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}
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(Value::Scalar(value), id) => {
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let sub = Array::new();
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sub.push(&datatype(&value).into());
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sub.push(&ScalarValue(value).into());
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sub.push(&id.to_string().into());
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result.push(&sub.into());
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}
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}
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}
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}
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Ok(result)
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}
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pub fn length(&mut self, obj: String, heads: Option<Array>) -> Result<f64, JsValue> {
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let obj = self.import(obj)?;
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if let Some(heads) = get_heads(heads) {
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Ok(self.0.length_at(&obj, &heads) as f64)
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} else {
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Ok(self.0.length(&obj) as f64)
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}
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}
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pub fn del(&mut self, obj: String, prop: JsValue) -> Result<(), JsValue> {
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let obj = self.import(obj)?;
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let prop = to_prop(prop)?;
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self.0.del(&obj, prop).map_err(to_js_err)?;
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Ok(())
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}
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pub fn mark(
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&mut self,
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obj: JsValue,
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range: JsValue,
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name: JsValue,
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value: JsValue,
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datatype: JsValue,
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) -> Result<(), JsValue> {
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let obj = self.import(obj)?;
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let re = Regex::new(r"([\[\(])(\d+)\.\.(\d+)([\)\]])").unwrap();
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let range = range.as_string().ok_or("range must be a string")?;
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let cap = re.captures_iter(&range).next().ok_or("range must be in the form of (start..end] or [start..end) etc... () for sticky, [] for normal")?;
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let start: usize = cap[2].parse().map_err(|_| to_js_err("invalid start"))?;
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let end: usize = cap[3].parse().map_err(|_| to_js_err("invalid end"))?;
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let start_sticky = &cap[1] == "(";
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let end_sticky = &cap[4] == ")";
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let name = name
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.as_string()
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.ok_or("invalid mark name")
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.map_err(to_js_err)?;
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let value = self.import_scalar(&value, datatype.as_string())?;
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self.0
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.mark(&obj, start, start_sticky, end, end_sticky, &name, value)
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.map_err(to_js_err)?;
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Ok(())
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}
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pub fn spans(&mut self, obj: JsValue) -> Result<JsValue, JsValue> {
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let obj = self.import(obj)?;
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let text = self.0.text(&obj).map_err(to_js_err)?;
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let spans = self.0.spans(&obj).map_err(to_js_err)?;
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let mut last_pos = 0;
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let result = Array::new();
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for s in spans {
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let marks = Array::new();
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for m in s.marks {
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let mark = Array::new();
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mark.push(&m.0.into());
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mark.push(&datatype(&m.1).into());
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mark.push(&ScalarValue(m.1).into());
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marks.push(&mark.into());
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}
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let text_span = &text[last_pos..s.pos]; //.slice(last_pos, s.pos);
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if text_span.len() > 0 {
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result.push(&text_span.into());
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}
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result.push(&marks);
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last_pos = s.pos;
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//let obj = Object::new().into();
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//js_set(&obj, "pos", s.pos as i32)?;
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//js_set(&obj, "marks", marks)?;
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//result.push(&obj.into());
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}
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let text_span = &text[last_pos..];
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if text_span.len() > 0 {
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result.push(&text_span.into());
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}
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Ok(result.into())
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}
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pub fn save(&mut self) -> Result<Uint8Array, JsValue> {
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self.0
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.save()
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.map(|v| Uint8Array::from(v.as_slice()))
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.map_err(to_js_err)
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}
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#[wasm_bindgen(js_name = saveIncremental)]
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pub fn save_incremental(&mut self) -> Uint8Array {
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let bytes = self.0.save_incremental();
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Uint8Array::from(bytes.as_slice())
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}
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#[wasm_bindgen(js_name = loadIncremental)]
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pub fn load_incremental(&mut self, data: Uint8Array) -> Result<f64, JsValue> {
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let data = data.to_vec();
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let len = self.0.load_incremental(&data).map_err(to_js_err)?;
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Ok(len as f64)
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}
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#[wasm_bindgen(js_name = applyChanges)]
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pub fn apply_changes(&mut self, changes: JsValue) -> Result<(), JsValue> {
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let changes: Vec<_> = JS(changes).try_into()?;
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self.0.apply_changes(&changes).map_err(to_js_err)?;
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Ok(())
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}
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#[wasm_bindgen(js_name = getChanges)]
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pub fn get_changes(&mut self, have_deps: JsValue) -> Result<Array, JsValue> {
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let deps: Vec<_> = JS(have_deps).try_into()?;
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let changes = self.0.get_changes(&deps);
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let changes: Array = changes
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.iter()
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.map(|c| Uint8Array::from(c.raw_bytes()))
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.collect();
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Ok(changes)
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}
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#[wasm_bindgen(js_name = getChangesAdded)]
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pub fn get_changes_added(&mut self, other: &Automerge) -> Result<Array, JsValue> {
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let changes = self.0.get_changes_added(&other.0);
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let changes: Array = changes
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.iter()
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.map(|c| Uint8Array::from(c.raw_bytes()))
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.collect();
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Ok(changes)
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}
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#[wasm_bindgen(js_name = getHeads)]
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pub fn get_heads(&mut self) -> Array {
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let heads = self.0.get_heads();
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let heads: Array = heads
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.iter()
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.map(|h| JsValue::from_str(&hex::encode(&h.0)))
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.collect();
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heads
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}
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#[wasm_bindgen(js_name = getActorId)]
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pub fn get_actor_id(&mut self) -> String {
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let actor = self.0.get_actor();
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actor.to_string()
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}
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#[wasm_bindgen(js_name = getLastLocalChange)]
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pub fn get_last_local_change(&mut self) -> Result<Option<Uint8Array>, JsValue> {
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if let Some(change) = self.0.get_last_local_change() {
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Ok(Some(Uint8Array::from(change.raw_bytes())))
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} else {
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Ok(None)
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}
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}
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pub fn dump(&self) {
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self.0.dump()
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}
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#[wasm_bindgen(js_name = getMissingDeps)]
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pub fn get_missing_deps(&mut self, heads: Option<Array>) -> Result<Array, JsValue> {
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let heads = get_heads(heads).unwrap_or_default();
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let deps = self.0.get_missing_deps(&heads);
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let deps: Array = deps
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.iter()
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.map(|h| JsValue::from_str(&hex::encode(&h.0)))
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.collect();
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Ok(deps)
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}
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#[wasm_bindgen(js_name = receiveSyncMessage)]
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pub fn receive_sync_message(
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&mut self,
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state: &mut SyncState,
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message: Uint8Array,
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) -> Result<(), JsValue> {
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let message = message.to_vec();
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let message = am::SyncMessage::decode(message.as_slice()).map_err(to_js_err)?;
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self.0
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.receive_sync_message(&mut state.0, message)
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.map_err(to_js_err)?;
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Ok(())
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}
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#[wasm_bindgen(js_name = generateSyncMessage)]
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pub fn generate_sync_message(&mut self, state: &mut SyncState) -> Result<JsValue, JsValue> {
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if let Some(message) = self.0.generate_sync_message(&mut state.0) {
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Ok(Uint8Array::from(message.encode().map_err(to_js_err)?.as_slice()).into())
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} else {
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Ok(JsValue::null())
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}
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}
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#[wasm_bindgen(js_name = toJS)]
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pub fn to_js(&self) -> JsValue {
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map_to_js(&self.0, ROOT)
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}
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fn import(&self, id: String) -> Result<ObjId, JsValue> {
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self.0.import(&id).map_err(to_js_err)
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}
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fn import_prop(&mut self, prop: JsValue) -> Result<Prop, JsValue> {
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if let Some(s) = prop.as_string() {
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Ok(s.into())
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} else if let Some(n) = prop.as_f64() {
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Ok((n as usize).into())
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} else {
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Err(format!("invalid prop {:?}", prop).into())
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}
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}
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fn import_scalar(
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&mut self,
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value: &JsValue,
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datatype: Option<String>,
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) -> Result<am::ScalarValue, JsValue> {
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match datatype.as_deref() {
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Some("boolean") => value
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.as_bool()
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.ok_or_else(|| "value must be a bool".into())
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.map(am::ScalarValue::Boolean),
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Some("int") => value
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.as_f64()
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.ok_or_else(|| "value must be a number".into())
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.map(|v| am::ScalarValue::Int(v as i64)),
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Some("uint") => value
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.as_f64()
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.ok_or_else(|| "value must be a number".into())
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.map(|v| am::ScalarValue::Uint(v as u64)),
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Some("f64") => value
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.as_f64()
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.ok_or_else(|| "value must be a number".into())
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.map(am::ScalarValue::F64),
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Some("bytes") => Ok(am::ScalarValue::Bytes(
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value.clone().dyn_into::<Uint8Array>().unwrap().to_vec(),
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)),
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Some("counter") => value
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.as_f64()
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.ok_or_else(|| "value must be a number".into())
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.map(|v| am::ScalarValue::counter(v as i64)),
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Some("timestamp") => value
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.as_f64()
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.ok_or_else(|| "value must be a number".into())
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.map(|v| am::ScalarValue::Timestamp(v as i64)),
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/*
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Some("bytes") => unimplemented!(),
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Some("cursor") => unimplemented!(),
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*/
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Some("null") => Ok(am::ScalarValue::Null),
|
|
Some(_) => Err(format!("unknown datatype {:?}", datatype).into()),
|
|
None => {
|
|
if value.is_null() {
|
|
Ok(am::ScalarValue::Null)
|
|
} else if let Some(b) = value.as_bool() {
|
|
Ok(am::ScalarValue::Boolean(b))
|
|
} else if let Some(s) = value.as_string() {
|
|
// FIXME - we need to detect str vs int vs float vs bool here :/
|
|
Ok(am::ScalarValue::Str(s.into()))
|
|
} else if let Some(n) = value.as_f64() {
|
|
if (n.round() - n).abs() < f64::EPSILON {
|
|
Ok(am::ScalarValue::Int(n as i64))
|
|
} else {
|
|
Ok(am::ScalarValue::F64(n))
|
|
}
|
|
// } else if let Some(o) = to_objtype(&value) {
|
|
// Ok(o.into())
|
|
} else if let Ok(d) = value.clone().dyn_into::<js_sys::Date>() {
|
|
Ok(am::ScalarValue::Timestamp(d.get_time() as i64))
|
|
} else if let Ok(o) = &value.clone().dyn_into::<Uint8Array>() {
|
|
Ok(am::ScalarValue::Bytes(o.to_vec()))
|
|
} else {
|
|
Err("value is invalid".into())
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
fn import_value(&mut self, value: JsValue, datatype: Option<String>) -> Result<Value, JsValue> {
|
|
match self.import_scalar(&value, datatype) {
|
|
Ok(val) => Ok(val.into()),
|
|
Err(err) => {
|
|
if let Some(o) = to_objtype(&value) {
|
|
Ok(o.into())
|
|
} else {
|
|
Err(err)
|
|
}
|
|
}
|
|
}
|
|
/*
|
|
match datatype.as_deref() {
|
|
Some("boolean") => value
|
|
.as_bool()
|
|
.ok_or_else(|| "value must be a bool".into())
|
|
.map(|v| am::ScalarValue::Boolean(v).into()),
|
|
Some("int") => value
|
|
.as_f64()
|
|
.ok_or_else(|| "value must be a number".into())
|
|
.map(|v| am::ScalarValue::Int(v as i64).into()),
|
|
Some("uint") => value
|
|
.as_f64()
|
|
.ok_or_else(|| "value must be a number".into())
|
|
.map(|v| am::ScalarValue::Uint(v as u64).into()),
|
|
Some("f64") => value
|
|
.as_f64()
|
|
.ok_or_else(|| "value must be a number".into())
|
|
.map(|n| am::ScalarValue::F64(n).into()),
|
|
Some("bytes") => {
|
|
Ok(am::ScalarValue::Bytes(value.dyn_into::<Uint8Array>().unwrap().to_vec()).into())
|
|
}
|
|
Some("counter") => value
|
|
.as_f64()
|
|
.ok_or_else(|| "value must be a number".into())
|
|
.map(|v| am::ScalarValue::counter(v as i64).into()),
|
|
Some("timestamp") => value
|
|
.as_f64()
|
|
.ok_or_else(|| "value must be a number".into())
|
|
.map(|v| am::ScalarValue::Timestamp(v as i64).into()),
|
|
Some("null") => Ok(am::ScalarValue::Null.into()),
|
|
Some(_) => Err(format!("unknown datatype {:?}", datatype).into()),
|
|
None => {
|
|
if value.is_null() {
|
|
Ok(am::ScalarValue::Null.into())
|
|
} else if let Some(b) = value.as_bool() {
|
|
Ok(am::ScalarValue::Boolean(b).into())
|
|
} else if let Some(s) = value.as_string() {
|
|
// FIXME - we need to detect str vs int vs float vs bool here :/
|
|
Ok(am::ScalarValue::Str(s.into()).into())
|
|
} else if let Some(n) = value.as_f64() {
|
|
if (n.round() - n).abs() < f64::EPSILON {
|
|
Ok(am::ScalarValue::Int(n as i64).into())
|
|
} else {
|
|
Ok(am::ScalarValue::F64(n).into())
|
|
}
|
|
} else if let Some(o) = to_objtype(&value) {
|
|
Ok(o.into())
|
|
} else if let Ok(d) = value.clone().dyn_into::<js_sys::Date>() {
|
|
Ok(am::ScalarValue::Timestamp(d.get_time() as i64).into())
|
|
} else if let Ok(o) = &value.dyn_into::<Uint8Array>() {
|
|
Ok(am::ScalarValue::Bytes(o.to_vec()).into())
|
|
} else {
|
|
Err("value is invalid".into())
|
|
}
|
|
}
|
|
}
|
|
*/
|
|
}
|
|
|
|
}
|
|
|
|
#[wasm_bindgen(js_name = create)]
|
|
pub fn init(actor: Option<String>) -> Result<Automerge, JsValue> {
|
|
console_error_panic_hook::set_once();
|
|
Automerge::new(actor)
|
|
}
|
|
|
|
#[wasm_bindgen(js_name = loadDoc)]
|
|
pub fn load(data: Uint8Array, actor: Option<String>) -> Result<Automerge, JsValue> {
|
|
let data = data.to_vec();
|
|
let mut automerge = am::Automerge::load(&data).map_err(to_js_err)?;
|
|
if let Some(s) = actor {
|
|
let actor = automerge::ActorId::from(hex::decode(s).map_err(to_js_err)?.to_vec());
|
|
automerge.set_actor(actor)
|
|
}
|
|
Ok(Automerge(automerge))
|
|
}
|
|
|
|
#[wasm_bindgen(js_name = encodeChange)]
|
|
pub fn encode_change(change: JsValue) -> Result<Uint8Array, JsValue> {
|
|
let change: am::ExpandedChange = change.into_serde().map_err(to_js_err)?;
|
|
let change: Change = change.into();
|
|
Ok(Uint8Array::from(change.raw_bytes()))
|
|
}
|
|
|
|
#[wasm_bindgen(js_name = decodeChange)]
|
|
pub fn decode_change(change: Uint8Array) -> Result<JsValue, JsValue> {
|
|
let change = Change::from_bytes(change.to_vec()).map_err(to_js_err)?;
|
|
let change: am::ExpandedChange = change.decode();
|
|
JsValue::from_serde(&change).map_err(to_js_err)
|
|
}
|
|
|
|
#[wasm_bindgen(js_name = initSyncState)]
|
|
pub fn init_sync_state() -> SyncState {
|
|
SyncState(am::SyncState::new())
|
|
}
|
|
|
|
// this is needed to be compatible with the automerge-js api
|
|
#[wasm_bindgen(js_name = importSyncState)]
|
|
pub fn import_sync_state(state: JsValue) -> Result<SyncState, JsValue> {
|
|
Ok(SyncState(JS(state).try_into()?))
|
|
}
|
|
|
|
// this is needed to be compatible with the automerge-js api
|
|
#[wasm_bindgen(js_name = exportSyncState)]
|
|
pub fn export_sync_state(state: SyncState) -> JsValue {
|
|
JS::from(state.0).into()
|
|
}
|
|
|
|
#[wasm_bindgen(js_name = encodeSyncMessage)]
|
|
pub fn encode_sync_message(message: JsValue) -> Result<Uint8Array, JsValue> {
|
|
let heads = js_get(&message, "heads")?.try_into()?;
|
|
let need = js_get(&message, "need")?.try_into()?;
|
|
let changes = js_get(&message, "changes")?.try_into()?;
|
|
let have = js_get(&message, "have")?.try_into()?;
|
|
Ok(Uint8Array::from(
|
|
am::SyncMessage {
|
|
heads,
|
|
need,
|
|
have,
|
|
changes,
|
|
}
|
|
.encode()
|
|
.unwrap()
|
|
.as_slice(),
|
|
))
|
|
}
|
|
|
|
#[wasm_bindgen(js_name = decodeSyncMessage)]
|
|
pub fn decode_sync_message(msg: Uint8Array) -> Result<JsValue, JsValue> {
|
|
let data = msg.to_vec();
|
|
let msg = am::SyncMessage::decode(&data).map_err(to_js_err)?;
|
|
let heads = AR::from(msg.heads.as_slice());
|
|
let need = AR::from(msg.need.as_slice());
|
|
let changes = AR::from(msg.changes.as_slice());
|
|
let have = AR::from(msg.have.as_slice());
|
|
let obj = Object::new().into();
|
|
js_set(&obj, "heads", heads)?;
|
|
js_set(&obj, "need", need)?;
|
|
js_set(&obj, "have", have)?;
|
|
js_set(&obj, "changes", changes)?;
|
|
Ok(obj)
|
|
}
|
|
|
|
#[wasm_bindgen(js_name = encodeSyncState)]
|
|
pub fn encode_sync_state(state: SyncState) -> Result<Uint8Array, JsValue> {
|
|
let state = state.0;
|
|
Ok(Uint8Array::from(
|
|
state.encode().map_err(to_js_err)?.as_slice(),
|
|
))
|
|
}
|
|
|
|
#[wasm_bindgen(js_name = decodeSyncState)]
|
|
pub fn decode_sync_state(data: Uint8Array) -> Result<SyncState, JsValue> {
|
|
SyncState::decode(data)
|
|
}
|
|
|
|
#[wasm_bindgen(js_name = MAP)]
|
|
pub struct Map {}
|
|
|
|
#[wasm_bindgen(js_name = LIST)]
|
|
pub struct List {}
|
|
|
|
#[wasm_bindgen(js_name = TEXT)]
|
|
pub struct Text {}
|
|
|
|
#[wasm_bindgen(js_name = TABLE)]
|
|
pub struct Table {}
|
|
```
|