System Events?

Event hooks allow you to integrate your custom programming into various places of Bonfire’s execution, without having to modify the core code. Because this is aimed squarely at the developer, and not the end user, there is no GUI to manage this functionality. Instead, registering events is done by modifying a config file.

Why Not Use Hooks?

CodeIgniter’s hooks are a great feature, but they don’t always provide enough flexibility. There is no documentation on how to create your own hooks (though it’s not that tough), and it lacks the ability to pass any dynamic parameters to the hook. For a modular system like Bonfire, hooks don’t provide any transparent method to support multiple modules.

That’s what System Events aim to solve.

Extending The Core

Bonfire's core provides a number of hooks integrated into the system that you can tap into to modify the behavior or data without modifying the core code itself. You tell Bonfire that you want to respond to certain events by creating a class/method and editing the config/events.php file with the name of the hook and the information where to find the code to run. The code can live in any module's library or controller that you choose.

2.1 Registering An Event

To take an action whenever a new user is created in the system, like creating some new data specific to your module, you would first create a method in your class' controller to handle this. For this example, we have chosen to add a setup_defaults() method in our my_module controller, but it could have been in a library just as easily.

    public function setup_defaults($user_id)
    {
        ...
    }

We know that the payload the event provides is the id of the user, so we capture that in the first parameter. At this point, we could use the user_model to retrieve the user, or save some new settings just for this user, etc.

The next step is to register our event in the configuration file. Open up application/config/events.php and add a new $config array.

    $config['after_create_user'][] = array(
        'module'     => 'my_module',
        'filepath'   => 'controllers',
        'filename'   => 'my_module.php',
        'class'  => 'My_module',
        'method'     => 'setup_defaults'
    );

The following parameters are all required within the config array:

  • module - The name of the module to find it it. Must be the same as the folder name of the module.
  • filepath - The path to the file within the module’s folder. This allows you to use any controller, library, or helper file for your event.
  • filename - The name of the file to load. Must include the file extension.
  • class -The name of the class to create an instance of.
  • method - The name of the method within the class to call.

Most system events will deliver a payload. This will typically be an array of data that the event allows you to operate on. Each payload will be described in the event descriptions below.

Core Events

The following table lists all events within the core of Bonfire that are available for you to access.

Controllers

Event Description
before_controller Called prior to the controller constructor being ran. Payload is the name of the current controller.
after_controller_constructor Called just after the controller constructor is ran, but prior to the method being ran. Payload is the name of the current controller.

Templates and Pages

Event Descrpription
after_page_render Called just after the main view is rendered. Payload is the view’s output.
after_layout_render Called just after the entire page is rendered. Payload is the current output.
after_block_render Called just after the block is rendered. Payload is an array with ‘block’ being the name of the block and ‘output’ being the rendered block’s output.

Users

Event Description
after_login Called after successful login. Payload is an array of user_id and role_id.
before_logout Called just before logging the user out. Payload is an array of user_id and role_id.
after_create_user Called after a user is created. Payload is the new user’s id.
before_user_update Called just prior to updating a user. Payload is an array of user_id and ‘data’, where data is all of the update information passed into the method. Note: user_id may be an array if the user_model's update() method is called with an array as the first parameter. In this case, the user's ID may not be in the array...
after_user_update Called just after updating a user. Payload is an array of user_id and ‘data’, where data is all of the update information passed into the method. Note: user_id may be an array if the user_model's update() method is called with an array as the first parameter. In this case, the user's ID may not be in the array...

Using Events In Your Modules

You can use events in your own modules to provide places for other modules to hook into. It is very simple and only requires that you use a single line of code in your library, model, or controller wherever you would like the hook to fire.

    Events::trigger('event_name', $payload);

The function takes two parameters.

The first parameter is the name of the event to call. You may use any name that you want, so long as it doesn't conflict with an existing event name. To avoid collisions, it is recommended that you prefix your event name with the name of your module, like forums.after_comment.

The second parameter is a single variable that contains the payload that you wish to provide to the event responders. This could be an ID, an array with multiple pieces of data, or anything else that is appropriate to your needs.

Profiler
Profiler Console 0 Load Time 9.7ms Memory Used 1.06 MB Database 4 Queries vars & Config Files 87

Console

Memory Usage

Benchmarks

1 ms Loading Time: Base Classes
7 ms Controller Execution Time ( Docs / Index )
10 ms Total Execution Time

Queries

0.0001 SELECT GET_LOCK('552fc964a4d1580dd38ca1821d2d151376fdb7da', 300) AS ci_session_lockSpeed: 0.0001 - Possible keys: - Key Used: - Type: - Rows: - Extra: No tables used
0.0002 SELECT `data` FROM `bf_ci3_sessions` WHERE `id` = '552fc964a4d1580dd38ca1821d2d151376fdb7da'Speed: 0.0002 - Possible keys: - Key Used: - Type: - Rows: - Extra: no matching row IN const table
0.0002 SHOW TABLES FROM `remytek`
0.0002 SELECT * FROM `bf_settings`Speed: 0.0002 - Possible keys: - Key Used: - Type: ALL - Rows: 37 - Extra:
0.0008 Total Query Execution Time

Session User Data

__ci_last_regenerate 1526845128
requested_page http://remytek.com/index.php/docs/developer/system_events
previous_page http://remytek.com/index.php/docs/developer/system_events

GET DATA

No GET data exists

POST DATA

No POST data exists

URI STRING

docs/developer/system_events

CLASS/METHOD

docs/index

HTTP HEADERS

HTTP_ACCEPT text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
HTTP_USER_AGENT CCBot/2.0 (http://commoncrawl.org/faq/)
HTTP_CONNECTION
SERVER_PORT 80
SERVER_NAME remytek.com
REMOTE_ADDR 54.81.0.22
SERVER_SOFTWARE Apache/2.4.18 (Ubuntu)
HTTP_ACCEPT_LANGUAGE
SCRIPT_NAME /index.php
REQUEST_METHOD GET
HTTP_HOST
REMOTE_HOST
CONTENT_TYPE
SERVER_PROTOCOL HTTP/1.0
QUERY_STRING
HTTP_ACCEPT_ENCODING x-gzip, gzip, deflate
HTTP_X_FORWARDED_FOR

CONFIG VARIABLES

base_url http://remytek.com/
index_page index.php
uri_protocol AUTO
url_suffix
language english
charset UTF-8
enable_hooks true
subclass_prefix MY_
composer_autoload false
permitted_uri_chars a-z 0-9~%.:_-
allow_get_array true
enable_query_strings false
controller_trigger c
function_trigger m
directory_trigger d
log_threshold 0
log_path /var/www/clients/client2/web2/bonfire/application/logs/
log_file_extension
log_file_permissions 420
log_date_format Y-m-d H:i:s
error_views_path
cache_path /var/www/clients/client2/web2/bonfire/application/cache/
cache_query_string false
encryption_key a9ff89765e5fc8a4ee203140cfff9400
sess_cookie_name bf_session
sess_expiration 7200
sess_time_to_update 300
sess_match_ip false
sess_expire_on_close false
sess_encrypt_cookie false
sess_use_database false
sess_table_name sessions
sess_match_useragent true
sess_driver database
sess_regenerate_destroy false
sess_save_path ci3_sessions
cookie_prefix
cookie_domain
cookie_path /
cookie_secure false
cookie_httponly false
standardize_newlines false
global_xss_filtering false
csrf_protection true
csrf_token_name ci_csrf_token
csrf_cookie_name ci_csrf_token
csrf_expire 7200
csrf_regenerate true
csrf_exclude_uris Array ( )
compress_output false
time_reference utc
rewrite_short_tags false
proxy_ips
bonfire.installed 1
site.default_user_timezone UM8
modules_locations Array ( [/var/www/clients/client2/web2/bonfire/application/modules/] => ../../application/modules/ [/var/www/clients/client2/web2/bonfire/bonfire/modules/] => ../../bonfire/modules/ )
site.backup_folder archives/
contexts Array ( [0] => content [1] => reports [2] => settings [3] => developer )
enable_activity_logging true
sparks_path ../sparks/
template.site_path /var/www/clients/client2/web2/web/
template.theme_paths Array ( [0] => themes )
template.default_layout index
template.ajax_layout ajax
template.use_mobile_themes false
template.default_theme default/
template.admin_theme admin
template.message_template <div class="alert alert-{type} alert-dismissable"> <button type="button" class="close" data-dismiss="alert" aria-hidden="true">×</button> <div>{message}</div> </div>
template.breadcrumb_symbol :
template.parse_views false
assets.directories Array ( [base] => assets [cache] => cache [css] => css [image] => images [js] => js [module] => module )
assets.js_opener $(document).ready(function() {
assets.js_closer });
assets.css_combine false
assets.js_combine false
assets.css_minify true
assets.js_minify true
assets.encrypt_name false
assets.encode false
assets.base_folder assets
assets.asset_folders Array ( [css] => css [js] => js [image] => images )
ui.current_shortcuts Array ( [form_save] => Array ( [description] => Save any form in the admin area. [action] => $("input[name=save]").click();return false; ) [create_new] => Array ( [description] => Create a new record in the module. [action] => window.location.href=$("a#create_new").attr("href"); ) [select_all] => Array ( [description] => Select all records in an index page. [action] => $("table input[type=checkbox]").click();return false; ) [delete] => Array ( [description] => Delete the record(s). [action] => $("#delete-me.btn-danger").click(); ) [module_index] => Array ( [description] => Return to the index of the current module. [action] => window.location.href=$("a#list").attr("href"); ) [goto_content] => Array ( [description] => Jump to the Content context. [action] => window.location.href=$("#tb_content").attr("href") ) [goto_reports] => Array ( [description] => Jump to the Reports context. [action] => window.location.href=$("#tb_reports").attr("href") ) [goto_settings] => Array ( [description] => Jump to the Settings context. [action] => window.location.href=$("#tb_settings").attr("href") ) [goto_developer] => Array ( [description] => Jump to the Developer context. [action] => window.location.href=$("#tb_developer").attr("href") ) )
emailer.write_to_file false
migrate.auto_core false
migrate.auto_app false
commonmark.valid_drivers Array ( [0] => Parsedown [1] => Markdown [2] => MarkdownExtra [3] => LeagueCommonMark )
commonmark.driver MarkdownExtended
docs.theme docs
docs.default_group developer
docs.show_dev_docs true
docs.show_app_docs true
docs.toc_file _toc.ini
docs.permitted_environments Array ( [0] => development [1] => testing [2] => production )

Files

application.php
/var/www/clients/client2/web2/bonfire/application/config/application.php
autoload.php
/var/www/clients/client2/web2/bonfire/application/config/autoload.php
config.php
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constants.php
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database.php
/var/www/clients/client2/web2/bonfire/application/config/database.php
events.php
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hooks.php
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mimes.php
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profiler.php
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routes.php
/var/www/clients/client2/web2/bonfire/application/config/routes.php
Base_Controller.php
/var/www/clients/client2/web2/bonfire/application/core/Base_Controller.php
MY_Model.php
/var/www/clients/client2/web2/bonfire/application/core/MY_Model.php
App_hooks.php
/var/www/clients/client2/web2/bonfire/application/hooks/App_hooks.php
application_lang.php
/var/www/clients/client2/web2/bonfire/application/language/english/application_lang.php
Profiler.php
/var/www/clients/client2/web2/bonfire/application/libraries/Profiler.php
Base.php
/var/www/clients/client2/web2/bonfire/application/third_party/MX/Base.php
Config.php
/var/www/clients/client2/web2/bonfire/application/third_party/MX/Config.php
Controller.php
/var/www/clients/client2/web2/bonfire/application/third_party/MX/Controller.php
Lang.php
/var/www/clients/client2/web2/bonfire/application/third_party/MX/Lang.php
Loader.php
/var/www/clients/client2/web2/bonfire/application/third_party/MX/Loader.php
Benchmark.php
/var/www/clients/client2/web2/bonfire/bonfire/ci3/core/Benchmark.php
CodeIgniter.php
/var/www/clients/client2/web2/bonfire/bonfire/ci3/core/CodeIgniter.php
Common.php
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Config.php
/var/www/clients/client2/web2/bonfire/bonfire/ci3/core/Config.php
Controller.php
/var/www/clients/client2/web2/bonfire/bonfire/ci3/core/Controller.php
Hooks.php
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Input.php
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Lang.php
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Loader.php
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Log.php
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Model.php
/var/www/clients/client2/web2/bonfire/bonfire/ci3/core/Model.php
Output.php
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Router.php
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Security.php
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URI.php
/var/www/clients/client2/web2/bonfire/bonfire/ci3/core/URI.php
Utf8.php
/var/www/clients/client2/web2/bonfire/bonfire/ci3/core/Utf8.php
hash.php
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mbstring.php
/var/www/clients/client2/web2/bonfire/bonfire/ci3/core/compat/mbstring.php
password.php
/var/www/clients/client2/web2/bonfire/bonfire/ci3/core/compat/password.php
standard.php
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DB.php
/var/www/clients/client2/web2/bonfire/bonfire/ci3/database/DB.php
DB_driver.php
/var/www/clients/client2/web2/bonfire/bonfire/ci3/database/DB_driver.php
DB_query_builder.php
/var/www/clients/client2/web2/bonfire/bonfire/ci3/database/DB_query_builder.php
DB_result.php
/var/www/clients/client2/web2/bonfire/bonfire/ci3/database/DB_result.php
mysqli_driver.php
/var/www/clients/client2/web2/bonfire/bonfire/ci3/database/drivers/mysqli/mysqli_driver.php
mysqli_result.php
/var/www/clients/client2/web2/bonfire/bonfire/ci3/database/drivers/mysqli/mysqli_result.php
directory_helper.php
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form_helper.php
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language_helper.php
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url_helper.php
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profiler_lang.php
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Cache.php
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Cache_dummy.php
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Driver.php
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Session.php
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Session_driver.php
/var/www/clients/client2/web2/bonfire/bonfire/ci3/libraries/Session/Session_driver.php
Session_database_driver.php
/var/www/clients/client2/web2/bonfire/bonfire/ci3/libraries/Session/drivers/Session_database_driver.php
BF_Lang.php
/var/www/clients/client2/web2/bonfire/bonfire/core/BF_Lang.php
BF_Loader.php
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BF_Model.php
/var/www/clients/client2/web2/bonfire/bonfire/core/BF_Model.php
BF_Router.php
/var/www/clients/client2/web2/bonfire/bonfire/core/BF_Router.php
BF_Security.php
/var/www/clients/client2/web2/bonfire/bonfire/core/BF_Security.php
BF_directory_helper.php
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BF_form_helper.php
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application_helper.php
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config_file_helper.php
/var/www/clients/client2/web2/bonfire/bonfire/helpers/config_file_helper.php
markdown_extended_helper.php
/var/www/clients/client2/web2/bonfire/bonfire/helpers/markdown_extended_helper.php
markdown_helper.php
/var/www/clients/client2/web2/bonfire/bonfire/helpers/markdown_helper.php
Assets.php
/var/www/clients/client2/web2/bonfire/bonfire/libraries/Assets.php
CommonMark.php
/var/www/clients/client2/web2/bonfire/bonfire/libraries/CommonMark.php
CommonMarkDriver.php
/var/www/clients/client2/web2/bonfire/bonfire/libraries/CommonMark/CommonMarkDriver.php
CommonMark_MarkdownExtended.php
/var/www/clients/client2/web2/bonfire/bonfire/libraries/CommonMark/drivers/CommonMark_MarkdownExtended.php
Console.php
/var/www/clients/client2/web2/bonfire/bonfire/libraries/Console.php
Events.php
/var/www/clients/client2/web2/bonfire/bonfire/libraries/Events.php
Modules.php
/var/www/clients/client2/web2/bonfire/bonfire/libraries/Modules.php
Route.php
/var/www/clients/client2/web2/bonfire/bonfire/libraries/Route.php
Template.php
/var/www/clients/client2/web2/bonfire/bonfire/libraries/Template.php
docs.php
/var/www/clients/client2/web2/bonfire/bonfire/modules/docs/config/docs.php
routes.php
/var/www/clients/client2/web2/bonfire/bonfire/modules/docs/config/routes.php
Docs.php
/var/www/clients/client2/web2/bonfire/bonfire/modules/docs/controllers/Docs.php
docs_lang.php
/var/www/clients/client2/web2/bonfire/bonfire/modules/docs/language/english/docs_lang.php
_sidebar.php
/var/www/clients/client2/web2/bonfire/bonfire/modules/docs/views/_sidebar.php
index.php
/var/www/clients/client2/web2/bonfire/bonfire/modules/docs/views/index.php
Settings_lib.php
/var/www/clients/client2/web2/bonfire/bonfire/modules/settings/libraries/Settings_lib.php
Settings_model.php
/var/www/clients/client2/web2/bonfire/bonfire/modules/settings/models/Settings_model.php
index.php
index.php
index.php
themes/docs/index.php