Add Text File Importer

[roundhill]

Building on #922 with an importer for text files in a folder. You simply construct a TextFileImporter with the note and tag bucket, and then pass along an array of File objects to importNotes():

const textImporter = new TextFileImporter({
        this.props.noteBucket,
        this.props.tagBucket
      });

      textImporter.on('status', (eventType, message) => {
        console.log(eventType, message);
      });

      const filesArray = [array of `File` objects]
      textImporter.importNotes(filesArray);

It will only pull in files that end in .txt that are less than 1mb in size.

Refs #916

[mirka]

Could we emit a 'complete' status event at the end of this, too?

[roundhill]

Yeah, this is async so I need to find a way to know when we've reached the end.

[roundhill]

Added a solution in 2bdc4bf. I'm not in love with it since it may fire early due to the async nature of FileReader, but it will probably suffice.

[mirka]

Btw this is exactly where Promises come in handy ✨

Simplified example:

const importTextFile = file => {
  return new Promise((resolve, reject) => {
    const fileReader = new FileReader();
    fileReader.onload = event => {

      // import note here...

      this.emit('status', 'progress', importedNoteCount);
      resolve();
    };

    fileReader.readAsText(file);
  });
};

Promise.all(filesArray.map(importTextFile))
  .then(() => {
    this.emit('status', 'complete', importedNoteCount);
  });

(Not a blocker, the lastFileName strategy is probably good enough and we can promisify it later!)

[roundhill]

Oh nice! I haven't worked with Promises before. 👍

[roundhill]

I think we may want to see if the title of the file is contained in the text. I have an export from apple notes that puts the title of the note in the file title, but not in the content:

😘Breakfast.txt

If the title isn't the first part of the content, we should use it as the title.

[roundhill]

If the title isn't the first part of the content, we should use it as the title.

Added via 876c7be

[SeanKilleen]

@roundhill thanks so much for this! Is going to save me a ton of time in my life.