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# Contains functionality for objects that can have task lists in their
# descriptions. Task list items can be added with Markdown like "* [x] Fix
# bugs".
#
# Used by MergeRequest and Issue
module Taskable
TASK_PATTERN_MD = /^(?<bullet> *[*-] *)\[(?<checked>[ xX])\]/.freeze
TASK_PATTERN_HTML = /^<li>(?<p_tag>\s*<p>)?\[(?<checked>[ xX])\]/.freeze
# Change the state of a task list item for this Taskable. Edit the object's
# description by finding the nth task item and changing its checkbox
# placeholder to "[x]" if +checked+ is true, or "[ ]" if it's false.
# Note: task numbering starts with 1
def update_nth_task(n, checked)
index = 0
check_char = checked ? 'x' : ' '
# Do this instead of using #gsub! so that ActiveRecord detects that a field
# has changed.
self.description = self.description.gsub(TASK_PATTERN_MD) do |match|
index += 1
case index
when n then "#{$LAST_MATCH_INFO[:bullet]}[#{check_char}]"
else match
end
end
save
end
# Return true if this object's description has any task list items.
def tasks?
description && description.match(TASK_PATTERN_MD)
end
# Return a string that describes the current state of this Taskable's task
# list items, e.g. "20 tasks (12 done, 8 unfinished)"
def task_status
return nil unless description
num_tasks = 0
num_done = 0
description.scan(TASK_PATTERN_MD) do
num_tasks += 1
num_done += 1 unless $LAST_MATCH_INFO[:checked] == ' '
end
"#{num_tasks} tasks (#{num_done} done, #{num_tasks - num_done} unfinished)"
end
end
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