Created
March 17, 2019 00:29
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Handle errors in all Discord commands with discordrb (also formats those errors while only keeping the path in the stacktrace relative to the project's root) (only Rails.root is Rails-specific, rest is pure ruby)
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module Discord | |
module Commands | |
extend Discordrb::Commands::CommandContainer | |
def self.handle_errors(e) | |
if e.is_a?(Discordrb::Errors::MessageTooLong) | |
"Message too long" | |
else | |
str = "#{Format.inline(e.message}\n" | |
str += Format.code(e.backtrace.grep(/#{Rails.root.to_s}/).map { |s| s.gsub(Rails.root.to_s, "") }.join("\n")) | |
str | |
end | |
end | |
old_command = method(:command) | |
def self.command(*args, &block) | |
old_command(*args, &block) | |
rescue => e | |
handle_errors(e) | |
rescue SyntaxError => e | |
handle_errors(e) | |
end | |
end | |
end |
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class Format | |
ZERO_WIDTH = "" | |
def self.i(str) | |
"_#{str}_" | |
end | |
def self.b(str) | |
"**#{str}**" | |
end | |
def self.bi(str) | |
"***#{str}***" | |
end | |
def self.u(str) | |
"__#{str}__" | |
end | |
def self.ui(str) | |
"__*#{str}*__" | |
end | |
def self.ub(str) | |
"__**#{str}**__" | |
end | |
def self.ubi(str) | |
"__***#{str}***__" | |
end | |
def self.strike(str) | |
"~~#{str}~~" | |
end | |
def self.inline(str) | |
"`#{str.gsub("`", "'")}`" | |
end | |
def self.code(str, language: nil) | |
str = str.gsub("`") { ZERO_WIDTH * 2 + "`" } | |
"```#{language}\n#{str}\n```" | |
end | |
def self.margin(str, margin: 2) | |
"\n" + str.lines.map { |l| " " * margin + l }.join + "\n" * 2 | |
end | |
def self.escape(str) | |
str = str.gsub('\\') { "\\\\" }.gsub("_") { '\\_' } | |
str = str.gsub("*") { "\\*" }.gsub("`") { ZERO_WIDTH * 2 + "`" } | |
str.gsub("~") { "\\~" } | |
end | |
def self.number(n) | |
n = n.to_i if n.to_i == n | |
ActiveSupport::NumberHelper.number_to_delimited(n) | |
end | |
end |
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