In-Memory Todo List Bot Behavior

[solomon-b]

Adds a basic Todo List bot behavior, resolving #44:

<<< 📝 podcast-guests create
>>> List Created
<<< 📝 podcast-guests 📝 masaeedu
>>> List Updated
<<< 📝 podcast-guests 📝 boarders
>>> List Updated
<<< 📝 podcast-guests
>>> podcast-guests:
0. masaeedu
1. boarders

<<< list podcast-guests create
>>> List Created
<<< list podcast-guests add masaeedu
>>> List Updated
<<< list podcast-guests add boarders
>>> List Updated
<<< list podcast-guests
>>> podcast-guests:
0. masaeedu
1. boarders

TODO:

• Pretty Printer for list output.
• Multiple lists indexed by strings (ala sessionization of the calculator bot).
• Finalize API

[solomon-b]

@isovector

• Is this a good API or do you want other commands?
• Is it okay to leave it as in memory for now or should we write to disk?
• How would you like the final pretty printed list to look?

[isovector]

I think we double down on emoji interfaces like the pear. Maybe we could use 📝 to add to a list and ✅ to remove from it.

[solomon-b]

I think these are all the actions we want:

- create <list-name>
- delete <list-name>
- show <list-name>
- add <list-name> <text>
- remove <list-name> <list-entry-key>
- update <list-name> <list-entry-key> <text>

Does that seem right? Can you help pick emojis for all of them?

[solomon-b]

@isovector I think this is ready to get merged. We can fine tune it based on how we end up using it:

<<< 📝 podcast-guests create
>>> List Created
<<< 📝 podcast-guests 📝 masaeedu
>>> List Updated
<<< 📝 podcast-guests 📝 boarders
>>> List Updated
<<< 📝 podcast-guests
>>> podcast-guests:
0. masaeedu
1. boarders

[isovector]

nice!

[solomon-b]

nice!

I wanna wait to merge this til the testing PR merges.

[solomon-b]

@isovector and anyone else interested, this feature is now fully functional and after #93 we are able to manage state persistence in a sane way. However, before merging I would like to tighten up the feature spec and API a bit.

Feature Set

• We can create and delete lists
• We can add and remove elements from the lists
• Lists are entirely public (for now, user based auth for behaviors will come in the future)

Feature Questions

• Do we want to have toggleable list items (like for TODOs?).
  -Should we track who created/modified list items in the state?
• Likewise, should we timestamp them?

Grammar

Were doing a kind of mixfix grammar:

INT := [0-9]*
WORD := <unicode without spaces>
NAME := 📝 | "list"
CREATE_LIST := NAME WORD (➕ | "create")
DELETE_LIST := NAME WORD (➖ | "delete")
PRINT_LIST := NAME WORD
ADD_LIST_ITEM := NAME WORD (📝 | "add") <rest_of_list>
REMOVE_LIST_ITEM := NAME WORD (✔ | "remove") INT
UPDATE_LIST_ITEM := NAME WORD "update" INT <rest_of_line>

I find this rather awkward and would prefer to do more traditional prefix style commands.