With version 3.22 and the addition of a configuration schema, the previous suggestion becomes (more) viable.
Instead of 'cheating' a value in CurrentUrl, I'm revising the suggested 'splice' command into a SayVar "key" command, with the idea of user inputs from the dedicated Settings menu item being called directly in the script.
Example:
Currently, adding an input box in the settings file, like
"type": "number",
"key": "testNumber",
"title": "Enter cover size",
"description": "Enter a number",
"default": 42
and calling it in the script, using IfVar
IfVar "testNumber" "42"
...
replace "600x600bb" "42x42bb"
EndIf
is working. This example allows to define a cover size in the settings menu, and get the cover art in that size; but only if the input is "42".
For this example to work with any input number, it would imply coding IfVar clauses for every numeric value, which is impractical. Instead, with a dedicated command, the value would be called directly into the current buffer, like
...
replace "600x600bb" ""
SayVar "testNumber"
Say "x"
SayVar "testNumber"
Say "bb"
...
which would return the same results as before (42x42bb), but would also allow for any numeric/string value to be used.
Another example would be to get the current values on the settings schema in an output, like
OutputTo "CurrentSettings"
Say "testChoices:"
SayVar "testChoices"
Say "|"
Say "testEnter:"
SayVar "testEnter"
Say "|"
Say "testNumber:"
SayVar "testNumber"
Say "|"
Say "testCheck:"
SayVar "testCheck"
Say "|"
...
which would be useful, for example, in debugging.
This is merely a (revised) suggestion for consideration. Feedback would be appreciated.