feat(examples): add memeland

[leohhhn]

Description

This PR adds the p/demo/memeland & r/demo/memeland package & realm to the examples folder. Adding this will be the way we "Deploy" the Memeland realm to the Portal Loop.

The UI and the most up to date code can be found here. Waiting on full release and will copy code over from the other repo.

The only thing currently missing are public realm functions tested. The package is fully tested.

Contributors' checklist...

• Added new tests, or not needed, or not feasible
• Provided an example (e.g. screenshot) to aid review or the PR is self-explanatory
• Updated the official documentation or not needed
• No breaking changes were made, or a BREAKING CHANGE: xxx message was included in the description
• Added references to related issues and PRs
• Provided any useful hints for running manual tests
• Added new benchmarks to generated graphs, if any. More info here.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 47.49%. Comparing base (5c5d9ef) to head (95c6a1c).

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #1751   +/-   ##
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  Coverage   47.49%   47.49%           
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  Files         388      388           
  Lines       61311    61311           
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  Hits        29117    29117           
  Misses      29756    29756           
  Partials     2438     2438           

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[zivkovicmilos]

Overall looks good, please address the comments 🙏

[ajnavarro]

I know this is a PoC, but took the liberty of giving some feedback related to the data structure and ways to paginate:

• AFAIK there is no need to remove posts, I would suggest changing the avl.Tree to a slice of Posts. This gives several advantages, like:
  • No need for casting when retrieving from the slice instead of the avl.Tree.
  • Sequential index already there, it will be the slice index instead of a string.
  • No rebalancing is needed.
  • Easier pagination mapping directly the elements per page and the page number to the slice indexes.
• I would change GetPosts() method to GetPosts(page,pagesize int). Too risky.
• I would limit the pageSize on GetPostsInRange.

[zivkovicmilos]

🚀 🚀 🚀