chunk 1.0.0

A package used to agnostically chunk and paginate your data

Used to paginate any type of data

Getting started

Simply use the Chunker class to select the value you'll be using as your identifier between chunks. Then supply a function to be called each time you need a new chunk from your data source. Once those are provided, a single function is all that's needed to infinitely walk through your data.

Usage

Set up

final chunker = Chunker<String, String>(
  cursorSelector: (v) => v,
  dataChunker: (cursor, limit) {
  final isFirstRun = cursor == null;

  return isFirstRun
    ? dataSource.take(limit)
    : dataSource
      .skipWhile((value) => value != cursor)
      .skip(1) // Start after the previous cursor
      .take(limit);
  },
);

Paginate

First Chunk

For the first chunk you can provide a new Chunk with a custom limit or provide null to accept the default limit of 20

final Chunk<String, String> nextChunk = await chunker.getNext(
  Chunk(limit: 15),
);

Remaining Chunks

For all future chunks, all you need to do is pass the previous chunk in.

await chunker.getNext(nextChunk);