Drupal 7 Module Development

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Chapter 5 As discussed earlier, it is possible for hook_mail() to handle multiple different e-mails as indicated by the key passed in from drupal_mail(). Even though we are only sending one e-mail with a key of 'warn', we still put it into a switch/case structure to make it easier to manage more mails later on if needed. Now we can get on with the real purpose of our hook implementation—adding details to the $message array that are unique to our mail. Typically this is the subject, body, and any additional headers that we might need. Our e-mail's subject and text have been set via the module's configuration page, so we retrieve them via variable_get() and set them to the $message['subject'] and $message['body] properties here. Note that we do not pass the subject and body strings through t() as we have done in other contexts. These strings are supplied by the site administrator through the User Warn module's configuration form, and as such are not translatable. Only hardcoded system strings need to be passed through t(). The other thing we need to do is to Bcc the site admin if that configuration setting has been set. if (variable_get('user_warn_bcc', FALSE)) { $admin_mail = variable_get('site_mail', NULL); $message['headers']['bcc'] = $admin_mail; } As with the other configuration settings, we retrieve it using variable_get(). If it is TRUE, then we need to set the site admin to be Bcc'd. Unlike the e-mail recipient, Cc and Bcc are set by adding headers to the $message array. The headers are themselves an associative array held under the 'headers' key, and we need to add a new header with the key 'Bcc'. We assign this to the site admin's e-mail in the same manner as we did in drupal_mail() while setting the mail's sender. This is all we need to do! $message is passed by reference, so we don't even need to return it. Drupal will just proceed on from here. After other modules get a chance to alter the mail through hook_mail_alter(), the $message array will be passed to drupal_mail_system() where the final mail message will be formatted and delivered (if you specified this option when you called drupal_mail()). [ 145 ]
Building an Admin Interface Debugging mail problems There are a variety of reasons why an e-mail might not be delivered. If the the recipient's address does not exist or there is another problem on the receiving end, the mail will be bounced back to the e-mail address specified in the sixth argument of drupal_mail() (the site administrator in this example.). In the case of a misconfigured local system, you may be able to find more information in PHP's error logs. The Reroute Mail module can be helpful if you are having problems sending mail on your development server: http://drupal.org/project/reroute_e-mail This is all good, and we actually have a fully functional module now. However, there is one more issue we should look at addressing. The token system It would be nice if we could include some personalized information in the mail text without having to hardcode it in the module configuration form. For instance, we should be able to include the login of the user being warned, or the name of the site admin. This leads us into our final topic, using Drupal's token system. What are tokens? A token is a small piece of text that can be placed into a piece of text via the use of a placeholder. When the text is passed through the function token_replace(), then the tokens are replaced with the appropriate information. Tokens allow users to include data that could change in text blocks, without having to go back and change it everywhere they're referenced. In previous versions of Drupal, tokens were implemented using the contributed module named, not surprisingly, Token. This functionality proved to be so popular and widely used that it was included in core for Drupal 7. A sample token is [site:name]. When text containing this token is passed through token_replace(), it is replaced with your site's name as defined in Home | Administer | Configuration | Site information. If you change your site's name, then in the future all text containing this token will reflect this change. Drupal exposes a variety of tokens containing information on users, nodes, site-wide configuration, and more. [ 146 ]
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www.allitebooks.com
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Drupal 7 Module Development Copyrig
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Foreword Drupal has its roots in th
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About the Authors Matt Butcher is a
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Larry Garfield is a Senior Architec
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John Albin Wilkins has been a web d
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Jojodae Ganesh Sivaji has been invo
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Why Subscribe? • Fully searchable
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Table of Contents Tools for develop
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Table of Contents A shortcut for sy
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Table of Contents Using hook_node_a
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Table of Contents Creating a task 3
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Preface Chapter 5, Building an Admi
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Preface The system for handling thi
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Developing for Drupal 7 Drupal is a
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However, what we do want to start w
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The Operating System Chapter 1 Wind
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Chapter 1 Drupal core is the founda
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Chapter 1 The database We have take
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Chapter 1 The responsibility of the
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Chapter 1 While one could imagine t
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Chapter 1 We assume that you have y
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Chapter 1 The following are a few o
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Creating Your First Module We are g
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Creating Your First Module As obvio
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Creating Your First Module By Drupa
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Creating Your First Module The next
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Creating Your First Module When Dru
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Creating Your First Module Doxygen-
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Creating Your First Module The help
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Creating Your First Module Drupal s
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Creating Your First Module Finally,
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Creating Your First Module Here's o
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Creating Your First Module ); } } r
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Creating Your First Module Not in J
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Creating Your First Module There ar
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Creating Your First Module The exam
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Creating Your First Module Setting
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Creating Your First Module } ); pub
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Creating Your First Module You migh
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Creating Your First Module The repo
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Drupal’s Theme Layer This book is
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Drupal’s Theme Layer There are ac
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Drupal’s Theme Layer Theme engine
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Drupal’s Theme Layer Preprocess f
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Drupal’s Theme Layer A Drupal the
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Drupal’s Theme Layer The theme()
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Drupal’s Theme Layer Now, if you
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Drupal’s Theme Layer A similar pr
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Drupal’s Theme Layer Now, that wa
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Drupal’s Theme Layer • #suffix:
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Drupal’s Theme Layer Two powerful
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Drupal’s Theme Layer 'menu_tree__
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Drupal’s Theme Layer If a functio
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Drupal’s Theme Layer We've also s
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Drupal’s Theme Layer Summary You'
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Theming a Module After all, if you
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Page 121 and 122: Theming a Module Theming a Drupal b
Page 123 and 124: Theming a Module Converting a theme
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Page 127 and 128: Theming a Module Notice that the .b
Page 129 and 130: Theming a Module } $block['content'
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Page 143 and 144: Building an Admin Interface Startin
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Page 174 and 175: Working with Content Drupal 7 intro
Page 176 and 177: Chapter 6 The Schema API allows dat
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Page 180 and 181: Chapter 6 'fieldable' => TRUE, 'ent
Page 182 and 183: Chapter 6 The return value from the
Page 184 and 185: Chapter 6 In our case, we defined t
Page 186 and 187: Chapter 6 Most entity operations in
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Page 198 and 199: Chapter 6 Master/slave database con
Page 200 and 201: Chapter 6 array($artwork->aid => $a
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Page 204 and 205: Chapter 6 } foreach ($artworks as $
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Page 208 and 209: Chapter 7 Although an advanced topi
Page 210 and 211: Chapter 7 The most important magic
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Page 214 and 215: Chapter 7 Exposing fields to the Fo
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Chapter 7 if ($widget['type'] == 'd
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Chapter 7 } return; 'field_ui_field
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Chapter 7 } function theme_dimfield
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Chapter 7 } '@height' => $item['hei
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Chapter 7 } else if ($settings['uni
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Chapter 7 We can, of course, have m
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Chapter 7 To demonstrate how entity
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[ 209 ] Chapter 7 Now look at that
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Drupal Permissions and Security Per
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Chapter 8 The preceding code checks
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Chapter 8 If we had accidentally ru
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Chapter 8 The user_access() functio
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In the first case, Are we looking a
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Chapter 8 Declaring your own access
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} Chapter 8 'page callback' => 'exa
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Chapter 8 if (!flood_is_allowed('co
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[ 227 ] Chapter 8 Enabling permissi
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Chapter 8 } $permissions = array( '
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Chapter 8 This approach is the prop
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Chapter 8 Running access checks on
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Chapter 8 Handling AJAX callbacks s
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Chapter 8 As a result, we cannot tr
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Chapter 8 This allows us to pass a
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Node Access Out-of-the-box, Drupal
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Chapter 9 The Node Access API allow
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* - "delete" * - "create" * @param
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Chapter 9 if (!user_access('access
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Chapter 9 } if (module_implements('
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Chapter 9 hook_node_access() is the
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Chapter 9 Note that the {node_acces
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Chapter 9 The basic permission 'cre
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Chapter 9 It is a good idea to writ
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Chapter 9 On node listing pages, th
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Chapter 9 Writing a complete node a
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• Can this user bypass node acces
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Chapter 9 For our test module, we w
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Chapter 9 When hook_node_access_rec
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Chapter 9 A few things to consider
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Chapter 9 Security considerations T
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Chapter 9 Rebuilding the {node_acce
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Chapter 9 Using the new hook_node_a
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Chapter 9 We may alter any element
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Chapter 9 } // Check anonymous user
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Chapter 9 // Check the permission.
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Chapter 9 The key to Devel Node Acc
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Chapter 9 In the preceding case, th
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JavaScript in Drupal JavaScript is
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Chapter 10 Adding JavaScript and CS
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Chapter 10 When a JavaScript librar
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The following code adds a system CS
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Chapter 10 The second argument can
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Chapter 10 From here onwards, when
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Chapter 10 If a renderable array is
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Chapter 10 Drupal specific JavaScri
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Chapter 10 There are three ways var
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Chapter 10 AJAX helpers Included in
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The callback function hello_world_s
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Chapter 10 Once the response is set
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ajax_command_prepend To add content
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Working with Files and Images Drupa
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Chapter 11 It is very important tha
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Chapter 11 In order to open files f
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Chapter 11 Stream wrappers If you'v
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Chapter 11 In some cases you may no
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Chapter 11 A read-only stream wrapp
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Chapter 11 } 'type' => STREAM_WRAPP
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Chapter 11 For full details of thes
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Chapter 11 After this setup, we sta
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Chapter 11 This is all very cool, b
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Chapter 11 This is where you can st
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Chapter 11 • form callback: If yo
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Chapter 11 Finally we can make the
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Chapter 11 Pretty cool right? Howev
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Chapter 11 As you can see, there is
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Installation Profiles This chapter
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Chapter 12 Profile modules and them
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Enabling modules Just like modules
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Chapter 12 • display_name: A huma
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Next, let's create a form to enter
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Chapter 12 Notice that $install_sta
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Chapter 12 Here, the task that sets
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Chapter 12 Each row being added to
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Chapter 12 // URL filter. 'filter_u
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Chapter 12 'locale' => 'en', ), //
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Database Access Although Drupal 7 h
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Appendix A Result objects The retur
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Appendix A The join() methods all r
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[ 369 ] Appendix A The db_insert()
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Appendix A A Merge query says, in e
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Appendix A Slave servers Drupal als
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Security Throughout this book, we h
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Filtering The following guidelines
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First, whenever we write a query ag
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Appendix B There are both RSS feeds
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ajax_command_alert command 309 ajax
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Drupal, subsytems blocks 20 code te
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form handling 229 forms access chec
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K key() method 371 L label property
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evision handling 175 revisions hand
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U unit test 49 update queries 370 u
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Drupal 7 ISBN: 978-1-84951-286-2 Pa
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