@struktoai/mirage-core/dist/io/writer.js

A Unified Virtual Filesystem For AI Agents

import { BytePipe } from "./pipe.js";
import { PipeClosed } from "./errors.js";
/** Feed one consuming write through a bounded pipe; finish waits for commit. */
export class ByteWriter {
    pipe = new BytePipe();
    task;
    failed = false;
    failure;
    constructor(consume) {
        this.task = Promise.resolve()
            .then(() => consume(this.pipe.stream()))
            .catch((error) => {
            this.failed = true;
            this.failure = error;
        })
            .finally(() => {
            this.pipe.closeReader();
        });
    }
    async write(data) {
        try {
            await this.pipe.write(data);
        }
        catch (error) {
            if (error instanceof PipeClosed) {
                await this.task;
                if (this.failed)
                    throw this.failure;
            }
            throw error;
        }
    }
    /** Wait until the consumer asks for its first bytes; one that ended first, as a refused open does, throws its error. */
    async opened() {
        await this.pipe.asked();
        if (!this.pipe.closedReader)
            return;
        await this.task;
        if (this.failed)
            throw this.failure;
    }
    async finish() {
        this.pipe.end();
        await this.task;
        if (this.failed)
            throw this.failure;
    }
    async abort() {
        this.pipe.end(new Error('Write aborted'));
        await this.task;
        this.pipe.closeReader();
    }
}
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