Created
June 28, 2015 19:02
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| require "pg" | |
| module Todo | |
| class Database | |
| READ_ONLY = true | |
| def initialize | |
| @db = PG.connect(dbname: 'todo') | |
| db.prepare("new_user", "INSERT INTO users (email, password, first_name, last_name) VALUES ($1, $2, $3, $4);") | |
| db.prepare("authentication", "SELECT email, password FROM users WHERE email = $1 AND password = $2;") | |
| db.prepare("load_up", "SELECT * FROM users WHERE email = $1;") | |
| db.prepare("emails", "SELECT email FROM users WHERE email = $1;") | |
| end | |
| attr_reader :db | |
| def valid?(email) | |
| check_if_email_available(email) | |
| end | |
| def errors(email) | |
| errors = [ ] | |
| unless check_if_email_available(email) | |
| errors << "#{email} is already taken. Please login or use another." | |
| end | |
| end | |
| def setup | |
| db.exec("CREATE TABLE IF NOT EXISTS users ( | |
| email text, | |
| password text, | |
| first_name text, | |
| last_name text );" | |
| ) | |
| end | |
| def save_user(user) | |
| db.exec_prepared("new_user", [user.email, user.password, user.first_name, user.last_name]) | |
| p user.email | |
| end | |
| def authenticate(email:, password:) | |
| user_data = {"email" => nil, "password" => nil } | |
| db.exec_prepared("authentication", [email, password]).each { |result| | |
| result.each { |line| | |
| user_data[line[0]] = line[1] | |
| } | |
| } | |
| if user_data["email"] == email && user_data["password"] == password | |
| user_data["email"] | |
| else | |
| nil | |
| end | |
| end | |
| def load_user(email) | |
| user_data = {} | |
| db.exec_prepared("load_up", [email]).each { |result| | |
| result.each { |line| | |
| user_data[line[0]] = line[1] | |
| } | |
| } | |
| user_data["email"] | |
| end | |
| private | |
| def check_if_email_available(email) | |
| user_data = {"email" => nil } | |
| db.exec_prepared("emails", [email]).each { |result| | |
| result.each { |line| | |
| user_data[line[0]] = line[1] | |
| } | |
| } | |
| user_data["email"].nil? | |
| end | |
| end | |
| end |
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