@assistant-ui/react
Version:
Typescript/React library for AI Chat
60 lines • 1.68 kB
JavaScript
// src/runtimes/remote-thread-list/OptimisticState.ts
import { BaseSubscribable } from "./BaseSubscribable.mjs";
var pipeTransforms = (initialState, extraParam, transforms) => {
return transforms.reduce((state, transform) => {
return transform?.(state, extraParam) ?? state;
}, initialState);
};
var OptimisticState = class extends BaseSubscribable {
_pendingTransforms = [];
_baseValue;
_cachedValue;
constructor(initialState) {
super();
this._baseValue = initialState;
this._cachedValue = initialState;
}
_updateState() {
this._cachedValue = this._pendingTransforms.reduce((state, transform) => {
return pipeTransforms(state, transform.task, [
transform.loading,
transform.optimistic
]);
}, this._baseValue);
this._notifySubscribers();
}
get baseValue() {
return this._baseValue;
}
get value() {
return this._cachedValue;
}
update(state) {
this._baseValue = state;
this._updateState();
}
async optimisticUpdate(transform) {
const task = transform.execute();
const pendingTransform = { ...transform, task };
try {
this._pendingTransforms.push(pendingTransform);
this._updateState();
const result = await task;
this._baseValue = pipeTransforms(this._baseValue, result, [
transform.optimistic,
transform.then
]);
return result;
} finally {
const index = this._pendingTransforms.indexOf(pendingTransform);
if (index > -1) {
this._pendingTransforms.splice(index, 1);
}
this._updateState();
}
}
};
export {
OptimisticState
};
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