Slack Export Exploder

Downloads all uploaded files and generates an HTML page for each of the channels and DMs in an unzipped Slack Export.

I wrote this specifically for my company's Corporate Export, so I can't guarantee it will work for the other export types. Furthermore, I made several decisions about what types of log data needed to be stored. However, the code is very straightforward, so it should be easy to extend.

Known Issues

Occasionally, when using the download-attachments option, a download might fail and trigger an ETIMEDOUT exception. To get around that (because I'm lazy and didn't want to implement retry logic), I added the ability to specify channels and DMs to exclude, so you can just exclude the ones that were already processed and start from the last one that was processed.
Even when not specifying the download-attachments option, the links in the resulting HTML are replaced with links to where the files would be downloaded. This was actually intentional, but should probably be made optional
The HTML generator was very hackily thrown together, and there is not currently a way to alter the resulting HTML/CSS via any command line options

Usage / Examples

node ./explode.js <SRC_DIR_OF_UNZIPPED_SLACK_EXPORT> <DEST_DIR_TO_CREATE_FILES> OPTIONS
  OPTIONS:
    "channels:all"
      - Will explode all channels (NOTE: this will override channels:only and channels:except)
    "channels:only:<channelname>,<channelname>,..."
      - Will only explode the provided channels
    "channels:except:<channelname>,<channelname>,..."
      - Will explode all channels except the provided channels
    "dms:all"
      - Will explode all DMs (NOTE: this will override dms:only and dms:except)
    "dms:only:<DM_Id>,<DM_Id>,..."
      - Will only explode the provided DMs
    "dms:except:<DM_Id>,<DM_Id>,..."
      - Will explode all DMs except the provided DMs
    "download-attachments"
      - Will also download the attachments

Example 1

node ./explode.js ./slack-export-data ./exploded-slack-export channels:all dms:all download-attachments

# Will load the channels, dms, groups, integration_logs, mpims and users json
# files located in ./slack-export-data/, then loop over all of the
# channels+groups+mpims (collectively considered "channels" by the program)
# and create an HTML file for each channel by loading the channel's log folder

# Will then loop over the DMs and create an HTML file for them as well, but
# will name them based on the DM's two user's usernames
# (e.g. dm_cbankester-jsmith)

Example 2

NOTE: This exmaple doesn't do anything! See below

node ./explode.js ./slack-export-data ./exploded-slack-export download-attachments

# Will do nothing, since no channels or DMs were specified and no `:all` options were provided

Example 3