Testing and patching of command line UI

[stdonnelly]

4 Was merged and closed without much testing. There are likely inaccurate prompts and possibly bugs with parts that weren't tested.

Known issues:

• [x] read search is such a common command, it should be replaced with just search. This was discovered when I was updating the database and kept typing just search.
• [x] create should have the ability to either go back (probably fairly difficult), or abort. When updating the database, I made typos and had to just exit the program to stop making the incorrect entry. This can possibly be done with a SIGINT listener.
• [x] Multiline notes cannot be entered. Some kind of heredoc would be nice.

[stdonnelly]

fa0c35a1c6c9bfcfc67a6bf03bc991506afefd2d allows the user to enter 'abort' to stop the operations that get user input. I would prefer listening for SIGINT (Ctrl+C), but it may not be possible to interrupt stdin when using blocking input from stdin.lines().

The best way I could find is doing this is to listen for SIGINT using ctrlc, where the listener sets some global "interrupted" flag. Then doing one of the following to deal with stdin:

• Just requiring Enter to be pressed after Ctrl+C and making input() check the flag after reading a line, as mentioned here
• Using async_std, also mentioned in the thread.
• Or spawning a thread to read stdin, then polling on a channel used by that thread, as mentioned here

[stdonnelly]

Multiline notes are supported by starting with a backtick ("`"). Notes can be inputted until the next backtick.

[stdonnelly]

search is now an alias for read search. A few other sub-commands were condensed as well