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# TaskService class
#
# Used for creating tasks on task queue after certain user action
#
# Ex.
# TaskService.new.new_issue(issue, current_user)
#
class TaskService
# When create an issue we should:
#
# * create a task for assignee if issue is assigned
# * create a task for each mentioned user on issue
#
def new_issue(issue, current_user)
new_issuable(issue, current_user)
end
# When update an issue we should:
#
# * mark all pending tasks related to the issue for the current user as done
#
def update_issue(issue, current_user)
create_mention_tasks(issue.project, issue, current_user)
end
# When close an issue we should:
#
# * mark all pending tasks related to the target for the current user as done
#
def close_issue(issue, current_user)
mark_pending_tasks_as_done(issue, current_user)
end
# When we reassign an issue we should:
#
# * create a pending task for new assignee if issue is assigned
#
def reassigned_issue(issue, current_user)
create_assignment_task(issue, current_user)
end
# When create a merge request we should:
#
# * creates a pending task for assignee if merge request is assigned
# * create a task for each mentioned user on merge request
#
def new_merge_request(merge_request, current_user)
new_issuable(merge_request, current_user)
end
# When update a merge request we should:
#
# * create a task for each mentioned user on merge request
#
def update_merge_request(merge_request, current_user)
create_mention_tasks(merge_request.project, merge_request, current_user)
end
# When close a merge request we should:
#
# * mark all pending tasks related to the target for the current user as done
#
def close_merge_request(merge_request, current_user)
mark_pending_tasks_as_done(merge_request, current_user)
end
# When we reassign a merge request we should:
#
# * creates a pending task for new assignee if merge request is assigned
#
def reassigned_merge_request(merge_request, current_user)
create_assignment_task(merge_request, current_user)
end
# When merge a merge request we should:
#
# * mark all pending tasks related to the target for the current user as done
#
def merge_merge_request(merge_request, current_user)
mark_pending_tasks_as_done(merge_request, current_user)
end
# When create a note we should:
#
# * mark all pending tasks related to the noteable for the note author as done
# * create a task for each mentioned user on note
#
def new_note(note, current_user)
handle_note(note, current_user)
end
# When update a note we should:
#
# * mark all pending tasks related to the noteable for the current user as done
# * create a task for each new user mentioned on note
#
def update_note(note, current_user)
handle_note(note, current_user)
end
# When marking pending tasks as done we should:
#
# * mark all pending tasks related to the target for the current user as done
#
def mark_pending_tasks_as_done(target, user)
pending_tasks(user, target.project, target).update_all(state: :done)
end
private
def create_tasks(project, target, author, users, action, note = nil)
Array(users).each do |user|
next if pending_tasks(user, project, target).exists?
Task.create(
project: project,
user_id: user.id,
author_id: author.id,
target_id: target.id,
target_type: target.class.name,
action: action,
note: note
)
end
end
def new_issuable(issuable, author)
create_assignment_task(issuable, author)
create_mention_tasks(issuable.project, issuable, author)
end
def handle_note(note, author)
# Skip system notes, like status changes and cross-references
return if note.system
project = note.project
target = note.noteable
mark_pending_tasks_as_done(target, author)
create_mention_tasks(project, target, author, note)
end
def create_assignment_task(issuable, author)
if issuable.assignee && issuable.assignee != author
create_tasks(issuable.project, issuable, author, issuable.assignee, Task::ASSIGNED)
end
end
def create_mention_tasks(project, issuable, author, note = nil)
mentioned_users = filter_mentioned_users(project, note || issuable, author)
create_tasks(project, issuable, author, mentioned_users, Task::MENTIONED, note)
end
def filter_mentioned_users(project, target, author)
mentioned_users = target.mentioned_users.select do |user|
user.can?(:read_project, project)
end
mentioned_users.delete(author)
mentioned_users.uniq
end
def pending_tasks(user, project, target)
user.tasks.pending.where(
project_id: project.id,
target_id: target.id,
target_type: target.class.name
)
end
end
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