awv3/plugins/sketcher/command/multirunner.js

⚡ AWV3 embedded CAD

/*
 * Combine multiple calls to run (e.g. session.request) into minimal number of group calls.
 * All calls to run will be remembered and executed at once at the next macrotask
 * (i.e. after all already resolved promises/async functions are executed).
 * commandRunner must be a function that accepts an array of arguments (commands)
 * and returns an array of results (possibly promises) of the same length.
 * It's intented to use a wrapper around session.execute as a commandRunner.
 */
export default class MultiRunner {
    constructor(commandRunner) {
        this.commandRunner = commandRunner;
        this.commands = [];
        this.resolves = [];
    }

    run(command) {
        if (this.commands.push(command) === 1)
            window.setTimeout(resolveCommands, 0, this.commandRunner, this.commands, this.resolves);
        return new Promise(resolve => this.resolves.push(resolve));
    }
}

function resolveCommands(commandRunner, commands, resolves) {
    commandRunner(commands).forEach((result, idx) => resolves[idx](result));
    commands.splice(0);
    resolves.splice(0);
}