Codimd: Support import from Hackpad

[jackycute]

Once our inspiration and example - Hackpad begun corruption.
Some pads are missing or inaccessible.
Here is a good start to save them.

This won't be a easy job - their APIs are not reliable and keys are needed.
PRs Welcome 😄 .

[Yukaii]

Also take a look at what Quip does. They provide a step-by-step UI to get this done.

[jackycute]

@Yukaii Sounds great, could you paste some screenshots?

[Yukaii]

Not workspace

Is workspace

[jackycute]

Yeah, I was thing how to tell user give us Client ID and Secret.
Provide a link is kind of intuitive 😄

[sakura26]

Actually hackpad have export function, owner can choose "Export to Markdown" and will get a zip package from email. Maybe we can have .MD/.zip uploads first? we can write DIY instruction.

here is the export sample:
ethanol.hackpad.com.me4dHrdkbyg.sgjhWg1aKj.zip

[jackycute]

@sakura26 It's surprisingly works better than its own API!
Hackpad sometimes will fail to response or response with glitch unicode when request for markdown.

[sakura26]

And maybe we can do grouping with GroupName+UUID tags first, so it will have its own list page without modify code.

[jackycute]

@sakura26 oh, that's somehow a good idea.

[ccoenen]

Request for the Markdown-zip-export hasn't worked for me, as far as I remember. We used to use Hackpad with a small team, so I bet I can get someone from the team to do a test-run.

[Vdragon]

The export to Markdown option produces markup that is not exactly map the Markdown spec, including but not limited to:

• "Heading 1" style being translated as 2nd level header ## Markup
• "Heading 2" style being translated as boldface **markup**
• "Heading 3" style being translated as HTML <undefined><li>**markup**</li></undefined>
• Every heading has trailing additional new line
• Unordered list using * markup with additional space between the bullet character and content

We should convert to proper markup in the import process though

[ccoenen]

This is now invalid as Hackpad is no longer, right?