Allow user to mark each task as done manually

app/controllers/dashboard/tasks_controller.rb

 class Dashboard::TasksController < Dashboard::ApplicationController
+  before_action :authorize_destroy_task!, only: [:destroy]
+
   def index
     @tasks = case params[:state]
       when 'done'
@@ -12,4 +14,25 @@ class Dashboard::TasksController < Dashboard::ApplicationController
     @pending_count = current_user.tasks.pending.count
     @done_count = current_user.tasks.done.count
   end
+
+  def destroy
+    task.done!
+
+    respond_to do |format|
+      format.html { redirect_to dashboard_tasks_path, notice: 'Task was successfully marked as done.' }
+      format.js { render nothing: true }
+    end
+  end
+
+  private
+
+  def authorize_destroy_task!
+    unless can?(current_user, :destroy_task, task)
+      return render_404
+    end
+  end
+
+  def task
+    @task ||= current_user.tasks.find(params[:id])
+  end
 end

app/models/ability.rb

@@ -17,6 +17,7 @@ class Ability
       when Namespace then namespace_abilities(user, subject)
       when GroupMember then group_member_abilities(user, subject)
       when ProjectMember then project_member_abilities(user, subject)
+      when Task then task_abilities(user, subject)
       else []
       end.concat(global_abilities(user))
     end
@@ -416,6 +417,16 @@ class Ability
       rules
     end
 
+    def task_abilities(user, task)
+      rules = []
+
+      if task && task.user == user
+        rules << :destroy_task
+      end
+
+      rules
+    end
+
     def abilities
       @abilities ||= begin
         abilities = Six.new

app/models/task.rb

@@ -32,6 +32,10 @@ class Task < ActiveRecord::Base
   scope :done, -> { with_state(:done) }
 
   state_machine :state, initial: :pending do
+    event :done do
+      transition pending: :done
+    end
+
     state :pending
     state :done
   end

app/views/dashboard/tasks/_task.html.haml

@@ -11,6 +11,10 @@
 
       · #{time_ago_with_tooltip(task.created_at)}
 
+    - if task.pending?
+      .task-actions.pull-right
+        = link_to 'Done', [:dashboard, task], method: :delete, class: 'btn'
+
     - if task.body?
       .task-body
         .task-note

config/routes.rb

@@ -333,7 +333,7 @@ Rails.application.routes.draw do
 
       resources :groups, only: [:index]
       resources :snippets, only: [:index]
-      resources :tasks, only: [:index]
+      resources :tasks, only: [:index, :destroy]
 
       resources :projects, only: [:index] do
         collection do