debian-mirror-gitlab/lib/gitlab/quick_actions/extractor.rb

152 lines
4 KiB
Ruby
Raw Normal View History

2018-12-23 12:14:25 +05:30
# frozen_string_literal: true
2016-09-13 17:45:13 +05:30
module Gitlab
2017-09-10 17:25:29 +05:30
module QuickActions
2016-09-13 17:45:13 +05:30
# This class takes an array of commands that should be extracted from a
# given text.
#
# ```
2017-09-10 17:25:29 +05:30
# extractor = Gitlab::QuickActions::Extractor.new([:open, :assign, :labels])
2016-09-13 17:45:13 +05:30
# ```
class Extractor
attr_reader :command_definitions
def initialize(command_definitions)
@command_definitions = command_definitions
end
# Extracts commands from content and return an array of commands.
# The array looks like the following:
# [
# ['command1'],
# ['command3', 'arg1 arg2'],
# ]
# The command and the arguments are stripped.
# The original command text is removed from the given `content`.
#
# Usage:
# ```
2017-09-10 17:25:29 +05:30
# extractor = Gitlab::QuickActions::Extractor.new([:open, :assign, :labels])
2016-09-13 17:45:13 +05:30
# msg = %(hello\n/labels ~foo ~"bar baz"\nworld)
# commands = extractor.extract_commands(msg) #=> [['labels', '~foo ~"bar baz"']]
# msg #=> "hello\nworld"
# ```
2018-12-13 13:39:08 +05:30
def extract_commands(content, only: nil)
2016-09-13 17:45:13 +05:30
return [content, []] unless content
content = content.dup
commands = []
content.delete!("\r")
2018-12-13 13:39:08 +05:30
content.gsub!(commands_regex(only: only)) do
2016-09-13 17:45:13 +05:30
if $~[:cmd]
2018-11-08 19:23:39 +05:30
commands << [$~[:cmd].downcase, $~[:arg]].reject(&:blank?)
2016-09-13 17:45:13 +05:30
''
else
$~[0]
end
end
2017-09-10 17:25:29 +05:30
content, commands = perform_substitutions(content, commands)
2016-09-13 17:45:13 +05:30
[content.strip, commands]
end
private
# Builds a regular expression to match known commands.
# First match group captures the command name and
# second match group captures its arguments.
#
# It looks something like:
#
# /^\/(?<cmd>close|reopen|...)(?:( |$))(?<arg>[^\/\n]*)(?:\n|$)/
2018-12-13 13:39:08 +05:30
def commands_regex(only:)
names = command_names(limit_to_commands: only).map(&:to_s)
2016-09-13 17:45:13 +05:30
@commands_regex ||= %r{
(?<code>
# Code blocks:
# ```
# Anything, including `/cmd arg` which are ignored by this filter
# ```
^```
.+?
\n```$
)
|
(?<html>
# HTML block:
# <tag>
# Anything, including `/cmd arg` which are ignored by this filter
# </tag>
^<[^>]+?>\n
.+?
\n<\/[^>]+?>$
)
|
(?<html>
# Quote block:
# >>>
# Anything, including `/cmd arg` which are ignored by this filter
# >>>
^>>>
.+?
\n>>>$
)
|
(?:
# Command not in a blockquote, blockcode, or HTML tag:
# /close
^\/
2018-11-08 19:23:39 +05:30
(?<cmd>#{Regexp.new(Regexp.union(names).source, Regexp::IGNORECASE)})
2016-09-13 17:45:13 +05:30
(?:
[ ]
2017-08-17 22:00:37 +05:30
(?<arg>[^\n]*)
2016-09-13 17:45:13 +05:30
)?
(?:\n|$)
)
2018-11-08 19:23:39 +05:30
}mix
2016-09-13 17:45:13 +05:30
end
2017-09-10 17:25:29 +05:30
def perform_substitutions(content, commands)
return unless content
substitution_definitions = self.command_definitions.select do |definition|
definition.is_a?(Gitlab::QuickActions::SubstitutionDefinition)
end
substitution_definitions.each do |substitution|
2018-11-08 19:23:39 +05:30
match_data = substitution.match(content.downcase)
2017-09-10 17:25:29 +05:30
if match_data
command = [substitution.name.to_s]
command << match_data[1] unless match_data[1].empty?
commands << command
end
2018-03-17 18:26:18 +05:30
2017-09-10 17:25:29 +05:30
content = substitution.perform_substitution(self, content)
end
[content, commands]
end
2018-12-13 13:39:08 +05:30
def command_names(limit_to_commands:)
2016-09-13 17:45:13 +05:30
command_definitions.flat_map do |command|
next if command.noop?
2018-12-13 13:39:08 +05:30
if limit_to_commands && (command.all_names & limit_to_commands).empty?
next
end
2016-09-13 17:45:13 +05:30
command.all_names
end.compact
end
end
end
end