@strapi/data-transfer/dist/directory/providers/destination/utils.mjs

Data transfer capabilities for Strapi

import { promises } from 'fs';
import path from 'path';
import { Writable } from 'stream';

/**
 * JSONL writer that mirrors {@link createTarEntryStream} but writes files under a root directory.
 */ const createDirectoryJsonlWriter = (rootDir, pathFactory, maxSize = 2.56e8)=>{
    let fileIndex = 0;
    let buffer = '';
    const resolvePath = (posixName)=>path.join(rootDir, ...posixName.split('/'));
    const flush = async ()=>{
        if (!buffer) {
            return;
        }
        fileIndex += 1;
        const name = pathFactory(fileIndex);
        const targetPath = resolvePath(name);
        await promises.mkdir(path.dirname(targetPath), {
            recursive: true
        });
        await promises.writeFile(targetPath, buffer, 'utf8');
        buffer = '';
    };
    const push = (chunk)=>{
        buffer += chunk;
    };
    return new Writable({
        async final (callback) {
            try {
                await flush();
                callback();
            } catch (err) {
                callback(err instanceof Error ? err : new Error(String(err)));
            }
        },
        async destroy (err, callback) {
            await flush();
            callback(err);
        },
        async write (chunk, _encoding, callback) {
            const size = chunk.length;
            if (chunk.length > maxSize) {
                callback(new Error(`payload too large: ${chunk.length}>${maxSize}`));
                return;
            }
            if (buffer.length + size > maxSize) {
                await flush();
            }
            push(chunk);
            callback(null);
        }
    });
};

export { createDirectoryJsonlWriter };
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