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+config.rb

+*.swp

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+-- Data model

+DROP TABLE reviews;

+DROP TABLE reviewers;

+DROP TABLE restaurants;

+CREATE TABLE restaurants (

+  id SERIAL UNIQUE NOT NULL,

+  restaurant_name TEXT NOT NULL,

+  short_name TEXT NOT NULL UNIQUE,

+  PRIMARY KEY (id)

+);

+

+CREATE TABLE reviewers (

+  id SERIAL UNIQUE NOT NULL,

+  reviewer_name TEXT UNIQUE NOT NULL,

+  created_date TIMESTAMP,

+  last_seen TIMESTAMP,

+  PRIMARY KEY (id)

+);

+

+CREATE TABLE reviews (

+  id SERIAL UNIQUE NOT NULL,

+  reviewer_id INTEGER REFERENCES reviewers (id) NOT NULL,

+  restaurant_id INTEGER REFERENCES restaurants (id) NOT NULL,

+  review_posted TIMESTAMP DEFAULT current_timestamp,

+  review TEXT NOT NULL,

+  UNIQUE (reviewer_id, restaurant_id),

+  PRIMARY KEY (id)

+);

+

+-- Stored Procedures

+

+CREATE OR REPLACE FUNCTION get_reviews(sn text)

+  RETURNS TABLE(review text, reviewer text)  AS $$

+BEGIN

+  RETURN QUERY SELECT reviews.review, reviewers.reviewer_name

+                FROM reviews

+                  INNER JOIN reviewers ON reviews.reviewer_id=reviewers.id

+                  INNER JOIN restaurants ON reviews.restaurant_id=restaurants.id

+                  WHERE restaurants.short_name=sn

+                  ORDER BY review_posted DESC,

+                           reviewer_name ASC;

+END;

+$$ LANGUAGE plpgsql;

+

+CREATE OR REPLACE FUNCTION put_review(sn text, rn text, review text)

+  RETURNS VOID AS $$

+DECLARE

+  restaurant_id int;

+  reviewer_id int;

+  nowstamp timestamp;

+BEGIN

+  SELECT restaurants.id INTO restaurant_id FROM restaurants WHERE restaurants.short_name=sn;

+  SELECT reviewers.id INTO reviewer_id FROM reviewers WHERE reviewers.reviewer_name=rn;

+

+  WITH new_values (rest_id, rev_id, review, tm) as (values (restaurant_id, reviewer_id, review, current_timestamp)),

+  upsert as

+  ( 

+      UPDATE reviews m 

+          SET restaurant_id = nv.rest_id,

+              reviewer_id = nv.rev_id,

+              review = nv.review,

+              review_posted = tm

+      FROM new_values nv

+      WHERE m.restaurant_id = nv.rest_id AND m.reviewer_id = nv.rev_id

+      RETURNING m.*

+  )

+  INSERT INTO reviews (restaurant_id, reviewer_id, review)

+  SELECT rest_id, rev_id, new_values.review

+  FROM new_values

+  WHERE NOT EXISTS (SELECT 1 

+                    FROM upsert up 

+                    WHERE up.restaurant_id = new_values.rest_id AND up.reviewer_id = new_values.rev_id);

+END;

+$$ LANGUAGE plpgsql;

+

+-- Test Data

+INSERT INTO restaurants  (restaurant_name, short_name) VALUES

+  ('Vigilante Coffee', 'vigilante-coffee'),

+  ('The Coffee Bar', 'the-coffee-bar'),

+  ('Peregrine Espresso', 'peregrine-espresso'),

+  ('Graffiato', 'graffiato');

+

+INSERT INTO reviewers (reviewer_name) VALUES

+  ('the_tooth_fairy'),

+  ('fiddlerwoaroof'),

+  ('grandma_johnson');

+

+INSERT INTO reviews (reviewer_id, restaurant_id, review) VALUES

+  ((SELECT id FROM reviewers where reviewer_name='the_tooth_fairy'), (SELECT id FROM restaurants where short_name='vigilante-coffee'), 'Great Coffee!'),

+  ((SELECT id FROM reviewers where reviewer_name='fiddlerwoaroof'),  (SELECT id FROM restaurants where short_name='vigilante-coffee'), 'My coffee was cold :/'),

+  ((SELECT id FROM reviewers where reviewer_name='grandma_johnson'), (SELECT id FROM restaurants where short_name='vigilante-coffee'), 'Bad Customer service, will actively avoid!'),

+  ((SELECT id FROM reviewers where reviewer_name='the_tooth_fairy'), (SELECT id FROM restaurants where short_name='peregrine-espresso'), 'The owner looked at me funny,  do not return!'),

+  ((SELECT id FROM reviewers where reviewer_name='fiddlerwoaroof'),  (SELECT id FROM restaurants where short_name='peregrine-espresso'), 'Great Coffee!'),

+  ((SELECT id FROM reviewers where reviewer_name='grandma_johnson'), (SELECT id FROM restaurants where short_name='peregrine-espresso'), 'Cockroach in bottom of french press, disgusting!'),

+  ((SELECT id FROM reviewers where reviewer_name='the_tooth_fairy'), (SELECT id FROM restaurants where short_name='graffiato'), 'Too Italian'),

+  ((SELECT id FROM reviewers where reviewer_name='fiddlerwoaroof'),  (SELECT id FROM restaurants where short_name='graffiato'), 'They dont have a peanut butter pizza!'),

+  ((SELECT id FROM reviewers where reviewer_name='grandma_johnson'), (SELECT id FROM restaurants where short_name='graffiato'), 'Whatever . . . '),

+  ((SELECT id FROM reviewers where reviewer_name='the_tooth_fairy'), (SELECT id FROM restaurants where short_name='the-coffee-bar'), 'Great Location! Good Coffee!'),

+  ((SELECT id FROM reviewers where reviewer_name='fiddlerwoaroof'),  (SELECT id FROM restaurants where short_name='the-coffee-bar'), 'Great Coffee! Good Location!'),

+  ((SELECT id FROM reviewers where reviewer_name='grandma_johnson'), (SELECT id FROM restaurants where short_name='the-coffee-bar'), 'This is too far from my knitting needles . . . ');

+

+SELECT * FROM reviews

+  RIGHT JOIN reviewers ON reviews.reviewer_id=reviewers.id

+  RIGHT JOIN restaurants ON reviews.restaurant_id=restaurants.id

+  WHERE short_name='vigilante-coffee';

+

+INSERT INTO reviewers (reviewer_name) VALUES ('the_great_one'); 

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+$appsettings = {

+  :dbname => 'howitis',

+  :dbuser => 'howitis',

+  :dbpassword => '<PW>',

+  :dbhost => '<HOST>'

+}

+

+

+

@@ -1,9 +1,82 @@

 # myapp.rb

 require 'sinatra'

+require 'sinatra/partial'

 require 'haml'

+require 'pg'

+require './config'

+

+def connect_db

+  return PG::Connection.open(:dbname=>$appsettings[:dbname],

+                             :host=>$appsettings[:dbhost],

+                             :user=>$appsettings[:dbuser],

+                             :password=>$appsettings[:dbpassword])

+end

+

+def check_user(db, user)

+  result = nil

+  db.prepare 'check_user', 'SELECT exists(SELECT 1 FROM reviewers WHERE reviewer_name=$1)'

+  if not user.nil?

+    v = db.exec_prepared('check_user', [user])

+    if v.first()['exists'] == 't'

+      result = user

+    end

+  end

+  return result

+end

+

+use Rack::Session::Pool, :expire_after => 2592000

 get '/' do

-  'Hello world!'

+  if params[:cur_user]

+    session[:cur_user] = params[:cur_user]

+  end

+

+  short_name = params.find do |x| x[1] == nil end

+  db = connect_db()

+  cur_user = check_user(db, session[:cur_user])

+  if short_name.nil?

+    restaurants = db.exec 'SELECT restaurant_name,short_name FROM restaurants ORDER BY restaurant_name ASC'

+    haml :index, :locals => {:restaurants => restaurants, :cur_user => cur_user}

+  else

+    short_name = short_name[0]

+    db.prepare 'get_restaurant_name', 'SELECT restaurant_name FROM restaurants WHERE short_name=$1'

+    db.prepare 'get_reviews', 'SELECT * FROM get_reviews($1)'

+

+    name = db.exec_prepared('get_restaurant_name', [short_name]).first['restaurant_name']

+    results = db.exec_prepared 'get_reviews', [short_name]

+    haml :restaurant, :locals => {:reviews => results,

+                             :name => name,

+                             :short_name => short_name,

+                             :cur_user => cur_user}

+  end

 end

+def short_name(name)

+  name.downcase().gsub(/[^a-zA-Z0-9]/, '-')

+end

+

+post '/add/restaurant' do

+  db = connect_db()

+  if check_user(db, session[:cur_user]).nil?

+    redirect to("/")

+  else

+    db.prepare 'add_restaurant', 'INSERT INTO restaurants (restaurant_name, short_name) VALUES ($1,$2)'

+    name = params[:restaurant_name]

+    sn = short_name(name)

+    db.exec_prepared 'add_restaurant', [name, sn]

+    redirect to("/?#{sn}")

+  end

+end

+

+

+post '/add/review' do

+  db = connect_db()

+  if check_user(db, session[:cur_user]).nil?

+    redirect to("/?#{params[:short_name]}")

+  else

+    db.prepare 'put_review',  'SELECT * FROM put_review($1, $2, $3)'

+    db.exec_prepared 'put_review', [ params[:short_name], session[:cur_user], params[:review] ]

+    redirect to("/?#{params[:short_name]}")

+  end

+end

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+%form{:action => "/add/review", :method => "post"}

+  %textarea{:name => "review"}

+    - if defined? review

+      = review['review']

+  %input{:type => "hidden", :value => short_name, :name => "short_name"}

+  %input{:type => "hidden", :value => cur_user, :name => "reviewer"}

+  %input{:type => "submit"}

+

+

@@ -1 +1,11 @@

-Hello World

+%article

+  %h1 How is

+  %ul.restaurants

+    - restaurants.each do |restaurant|

+      %a{:href => "/?#{restaurant['short_name']}"}

+        %li= "#{restaurant['restaurant_name']}?"

+    - if not cur_user.nil?

+      %li

+        %form{:action => "/add/restaurant", :method => "post"}

+          %input{:type => "text", :name => "restaurant_name"}

+          %input{:type => "submit"}

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+- comment_form_shown = false

+%article

+  %h1= name

+  %a{:href => "/"} Go Back>

+  %section#reviews

+    %h2 how it is:

+    %ul.reviews

+      - reviews.each do |review|

+        - if review['reviewer'] != cur_user

+          %li= "#{review['review']} —#{review['reviewer']}"

+        - else

+          %li= partial :comment_form,

+            :locals => {:review => review, :cur_user => cur_user, :short_name => short_name} 

+          - comment_form_shown = true

+      - if not comment_form_shown and not cur_user.nil?

+        %li= partial :comment_form,

+          :locals => {:cur_user => cur_user, :short_name => short_name}