Generating HTML with ERB
Exercise 3.1
With what you’ve learned from the Embedded Ruby chapter, your goal now is to generate the same HTML as in the exercise The Mailbox Html Formatter - except that you now use ERB for generating the HTML, not the MailboxHtmlFormatter class.
Make a new file mailbox_erb-1.rb and add the following code:
require "erb"
class Email
# your class from Ruby for Beginners, exercise 13.1
end
class Mailbox
# your class from Ruby for Beginners, exercise 13.1
end
emails = [
Email.new("Homework this week", date: "2014-12-01", from: "Ferdous"),
Email.new("Keep on coding! :)", date: "2014-12-01", from: "Dajana"),
Email.new("Re: Homework this week", date: "2014-12-02", from: "Ariane")
]
mailbox = Mailbox.new("Ruby Study Group", emails)
html = # complete this code ...
puts html
Now complete it so that it outputs exactly the same HTML code as in Ruby for Beginners, exercise 13.1:
<html>
<head>
<style>
table {
border-collapse: collapse;
}
td, th {
border: 1px solid black;
padding: 1em;
}
</style>
</head>
<body>
<h1>Ruby Study Group</h1>
<table>
<thead>
<tr>
<th>Date</th>
<th>From</th>
<th>Subject</th>
</tr>
</thead>
<tbody>
<tr>
<td>2014-12-01</td>
<td>Ferdous</td>
<td>Homework this week</td>
</tr>
<tr>
<td>2014-12-01</td>
<td>Dajana</td>
<td>Keep on coding! :)</td>
</tr>
<tr>
<td>2014-12-02</td>
<td>Ariane</td>
<td>Re: Homework this week</td>
</tr>
</tbody>
</table>
</body>
</html>
Exercise 3.2
Implement a class MailboxErbRenderer which takes a mailbox, and a filename to an ERB template:
class MailboxErbRenderer
# fill in this class body
end
mailbox = Mailbox.new("Ruby Study Group", emails)
renderer = MailboxErbRenderer.new(mailbox, "mailbox.erb")
html = renderer.render
puts html