require 'rubygems'
require 'bundler'

Bundler.require

class TaskCreateViewController < Nitron::ViewController
  # The on class method is part of Nitron's Action DSL.
  # It wires the provided block to be an event handler for the specified outlet using the iOS target/action pattern.
  on :cancel do
    close
  end

  # Nitron emulates 'native' outlet support, allowing you to easily define outlets through Xcode.
  # The titleField and datePicker methods are created upon initial load by using metadata contained in the Storyboard.
  on :save do
    Task.create(title: titleField.text, due: datePicker.date)

    close
  end
end

# Querying Tasks

Task.all # Array of tasks

Task.pluck(:assignee_id) # returns array of non-distinct values
Task.uniq.pluck(:assignee_id) # now the array of id values is distinct

Task.first # First task or nil
Task.first! # First task or Nitron::RecordNotFound exception

Task.limit(1) # returns one task
Task.offset(5).limit(1) # grab the 6th task, as an array with one item in it
Task.where("title contains[cd] ?", "some") # grab all tasks with the title containing "some", case insensitive
Task.where("title contains[cd] ?", "some").count # db call to count the objects matching the conditions

Task.count # number of tasks in the system

Task.order("title", ascending: false) # Tasks order in reverse alphabetical order on title attribute

# Overriding existing query
scope = Task.where("status = ?", :open)
scope.except(:where).where("status = ?", :closed) # realized I really wanted closed items
scope.order(...).except(:order)
scope.limit(...).except(:limit)

# Daisy Chaining
Task.where(...).order(...).where(...).offset(10).limit(5).count # Yep, this works!
Task.where(...).order(...).all # array of the results

# Dynamic Finders
Task.find_by_status :open # returns the first task with a status of open, or nil
Task.find_all_by_status :open # returns array containing Tasks matching that status

# Creating tasks
Task.create assignee_id: 1, title: "some title" # runs validations, saves object into the default context if validations pass
Task.create! # Nitron::RecordNotSaved thrown if validations fail
Task.new # creates a new Task object, outside of a NSManagedObjectContext, optionally takes attributes

task = Task.new
task.save # will save, true if successful, false if failed
task.save! # will throw Nitron::RecordNotSaved if failed, contains errors object for validation messages