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Forbid axium and rulesets with unbalanced brackets

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This commit is contained in:
Wuzzy 2018-05-17 20:25:54 +02:00
parent 0a0ba8da0a
commit 6317a11faa
1 changed files with 26 additions and 5 deletions
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21
init.lua
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@ -720,12 +720,33 @@ function ltool.evaluate_edit_fields(fields, ignore_name)
return false
end
end
-- Validation helper: Checks for balanced brackets
local b = function(str)
local brackets = 0
for c=1, string.len(str) do
local char = string.sub(str, c, c)
if char == "[" then
brackets = brackets + 1
elseif char == "]" then
brackets = brackets - 1
if brackets < 0 then
return false
end
end
end
return brackets == 0
end
if(v(fields.axiom) and v(fields.rules_a) and v(fields.rules_b) and v(fields.rules_c) and v(fields.rules_d)) then
if(b(fields.axiom) and b(fields.rules_a) and b(fields.rules_b) and b(fields.rules_c) and b(fields.rules_d)) then
treedef.rules_a = fields.rules_a
treedef.rules_b = fields.rules_b
treedef.rules_c = fields.rules_c
treedef.rules_d = fields.rules_d
treedef.axiom = fields.axiom
else
return nil, "The brackets are unbalanced! For each of the axiom and the rule sets, each opening bracket must be matched by a closing bracket."
end
else
return nil, "The axiom or one of the rule sets contains at least one invalid character.\nSee the cheat sheet for a list of allowed characters."
end