Conditionals can be used to decide what the bot should do based on input it receives or the state that it is in at a given moment. Bubblescript supports several methods of describing these conditions. The preferred method is a branch. Conditionals are written down with the aid of logical expressions in the form of predicates. The following operators can be used to write logical expressions:
The following operators can be used:
a && b # AND a || b # OR a ! b # NOT a == b # IS a != b # IS NOT a <= b # IS SMALLER OR EQUAL TO a >= b # IS LARGER OR EQUAL TO a < b # IS SMALLER a > b # IS LARGER
branch statement is used for branching the control flow into
different directions. It has two variants, the "bare" branch and a
branch statement evaluates each expression top down until the first one that
evaluates to true. The expressions are seperated by
-> and then 1 or multiple lines of
indented code that is executed sequentially.
This is especially handy if you want to check more than two predicates:
ask "Do you want to continue?", expecting: ["Yes", "No", "Maybe"] branch do answer == "No" -> say "Sorry to hear" answer == "Yes" -> say "Great!" answer == "Maybe" -> say "Make up your mind!" end
In the above example the
expecting: assures that answer can only
contain the 3 cases we branch on. If you branch on an open answer, you
else to catch any other answers that are given:
ask "What is your name?" branch do answer == "Steve" -> say "Hi Steve!" answer == "Pete" -> say "Hello Peter" else say "hi stranger" end
It occurs much that you are branching on the same variable. In that
case, you can use a shorthand syntax, the "variable"
ask "What is your name?" branch answer do "Steve" -> say "Hi Steve!" "Pete" -> say "Hello Peter" else say "hi stranger" end
This example is exactly identical as the one before, but here we
specify that we want to compare
answer variable in each of the
branches. The comparison is done with the Bubblescript
To allow the bot to make decision based on the users input the
else used to conditionally execute blocks of code
if you can test for truthiness of a condition (predicate).
if (platform == "Yes" || app == "Yes") do say "Apps or platforms are not really a thing anymore." end
Reads: "If variable platform is equal to "Yes" and variable app is equal to "Yes" do the following"
else block if the
if statement evaluates to false (is not true).
if exits != "Yes" do say "I believe in your product. Let's do it!" else if team > 3 do say "I think your team is too big." else if platform == "Yes" || app == "Yes" do say "Apps or platforms are not really a thing anymore." end end end