03 where order joins

Gemfile

@@ -0,0 +1,8 @@
+# frozen_string_literal: true
+
+source "https://rubygems.org"
+
+git_source(:github) {|repo_name| "https://github.com/#{repo_name}" }
+
+# gem "rails"
+gem 'bloc_record', path: '../bloc_record'

Gemfile.lock

@@ -0,0 +1,19 @@
+PATH
+  remote: ../bloc_record
+  specs:
+    bloc_record (0.0.0)
+      sqlite3 (~> 1.3)
+
+GEM
+  remote: https://rubygems.org/
+  specs:
+    sqlite3 (1.3.13)
+
+PLATFORMS
+  ruby
+
+DEPENDENCIES
+  bloc_record!
+
+BUNDLED WITH
+   1.16.0.pre.3

address_bloc.rb

@@ -1,4 +1,7 @@
 require_relative 'controllers/menu_controller'
+require 'bloc_record'
+
+BlocRecord.connect_to("db/address_bloc.sqlite")
 
 menu = MenuController.new
 system "clear"

controllers/menu_controller.rb

@@ -4,11 +4,12 @@ class MenuController
   attr_reader :address_book
 
   def initialize
-    @address_book = AddressBook.new
+    @address_book = AddressBook.first
   end
 
   def main_menu
-    puts "Main Menu - #{address_book.entries.count} entries"
+    puts "#{@address_book.name} Address Book Selected\n#{@address_book.entries.count} entries"
+    puts "0 - Switch AddressBook"
     puts "1 - View all entries"
     puts "2 - Create an entry"
     puts "3 - Search for an entry"
@@ -19,6 +20,10 @@ def main_menu
     selection = gets.to_i
 
     case selection
+      when 0
+         system "clear"
+         select_address_book_menu
+         main_menu
       when 1
         system "clear"
         view_all_entries
@@ -45,8 +50,24 @@ def main_menu
     end
   end
 
+
+  def select_address_book_menu
+   puts "Select an Address Book:"
+   AddressBook.all.each_with_index do |address_book, index|
+     puts "#{index} - #{address_book.name}"
+   end
+
+   index = gets.chomp.to_i
+
+   @address_book = AddressBook.find(index + 1)
+   system "clear"
+   return if @address_book
+   puts "Please select a valid index"
+   select_address_book_menu
+  end
+
   def view_all_entries
-    address_book.entries.each do |entry|
+    @address_book.entries.each do |entry|
       system "clear"
       puts entry.to_s
       entry_submenu(entry)
@@ -75,7 +96,7 @@ def create_entry
   def search_entries
     print "Search by name: "
     name = gets.chomp
-    match = address_book.binary_search(name)
+    match = @address_book.find_entry(name)
     system "clear"
     if match
       puts match.to_s
@@ -176,4 +197,3 @@ def search_submenu(entry)
     end
   end
 end
-

db/create_tables.rb

@@ -0,0 +1,24 @@
+require 'sqlite3'
+
+db = SQLite3::Database.new "db/address_bloc.sqlite"
+
+db.execute("DROP TABLE IF EXISTS address_book;");
+db.execute("DROP TABLE IF EXISTS entry;");
+
+db.execute <<-SQL
+    CREATE TABLE address_book (
+      id INTEGER PRIMARY KEY,
+      name VARCHAR(30)
+    );
+  SQL
+
+db.execute <<-SQL
+    CREATE TABLE entry (
+      id INTEGER PRIMARY KEY,
+      address_book_id INTEGER,
+      name VARCHAR(30),
+      phone_number VARCHAR(30),
+      email VARCHAR(30),
+      FOREIGN KEY (address_book_id) REFERENCES address_book(id)
+    );
+  SQL

db/seed.rb

@@ -0,0 +1,13 @@
+require_relative '../models/address_book'
+require_relative '../models/entry'
+require 'bloc_record'
+
+BlocRecord.connect_to('db/address_bloc.sqlite')
+
+book = AddressBook.create(name: 'My Address Book')
+
+puts 'Address Book created'
+puts 'Entry created'
+puts Entry.create(address_book_id: book.id, name: 'Foo One', phone_number: '999-999-9999', email: '[email protected]' )
+puts Entry.create(address_book_id: book.id, name: 'Foo Two', phone_number: '111-111-1111', email: '[email protected]' )
+puts Entry.create(address_book_id: book.id, name: 'Foo Three', phone_number: '222-222-2222', email: '[email protected]' )

models/address_book.rb

@@ -1,22 +1,20 @@
 require_relative 'entry'
 require "csv"
+require "bloc_record/base"
 
-class AddressBook
-  attr_reader :entries
+class AddressBook < BlocRecord::Base
 
-  def initialize
-    @entries = []
+  def add_entry(name, phone_number, email)
+    Entry.create(name: name, phone_number: phone, email: email, address_book_id: self.id)
   end
 
-  def add_entry(name, phone_number, email)
-    index = 0
-    entries.each do |entry|
-      if name < entry.name
-        break
-      end
-      index += 1
-    end
-    entries.insert(index, Entry.new(name, phone_number, email))
+  def entries
+    Entry.order("name ASC, phone_number DESC")
+    # Entry.where(address_book_id: self.id)
+  end
+
+  def find_entry(name)
+    Entry.where(name: name, address_book_id: self.id).first
   end
 
   def import_from_csv(file_name)
@@ -29,24 +27,4 @@ def import_from_csv(file_name)
     end
   end
 
-  # Search AddressBook for a specific entry by name
-  def binary_search(name)
-    lower = 0
-    upper = entries.length - 1
-
-    while lower <= upper
-      mid = (lower + upper) / 2
-      mid_name = entries[mid].name
-
-      if name == mid_name
-        return entries[mid]
-      elsif name < mid_name
-        upper = mid - 1
-      elsif name > mid_name
-        lower = mid + 1
-      end
-    end
-
-    return nil
-  end
 end

models/entry.rb

@@ -1,14 +1,9 @@
-class Entry
-  # These must be accessors since we mutate them
-  attr_accessor :name, :phone_number, :email
+require 'bloc_record/base'
 
-  def initialize(name, phone_number, email)
-    @name = name
-    @phone_number = phone_number
-    @email = email
-  end
+class Entry < BlocRecord::Base
 
   def to_s
     "Name: #{name}\nPhone Number: #{phone_number}\nEmail: #{email}"
   end
+
 end