@vaadin/hilla-react-signals/ValueSignal.js

Signals for Hilla React

import { createSetCommand, isSetCommand, isSnapshotCommand } from './commands.js';
import { $createOperation, $processServerResponse, $resolveOperation, $setValueQuietly, $update, FullStackSignal, } from './FullStackSignal.js';
export class ValueSignal extends FullStackSignal {
    #pendingRequests = new Map();
    set(value) {
        const command = createSetCommand('', value);
        const promise = this[$update](command);
        this[$setValueQuietly](value);
        return this[$createOperation]({ id: command.commandId, promise });
    }
    [$processServerResponse](command) {
        const record = this.#pendingRequests.get(command.commandId);
        if (record) {
            this.#pendingRequests.delete(command.commandId);
        }
        this.#recalculateState(command);
        [record?.id, command.commandId].filter(Boolean).forEach((id) => this[$resolveOperation](id, undefined));
    }
    #recalculateState(command) {
        if (isSetCommand(command)) {
            this[$setValueQuietly](command.value);
        }
        else if (isSnapshotCommand(command)) {
            const node = command.nodes[''];
            if (node && 'value' in node) {
                this[$setValueQuietly](node.value);
            }
        }
    }
}
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