Category:Library -> Community | Category:Library -> Loader
<?
/*****************************************************************
| biz_Loader.php
|
| CI_Loader extension class.
|
| Copyright (c) 2008, Biz Computing, Inc.
| Portions based on code Copyright (c) 2006, EllisLab, Inc., All rights reserved.
|
| Permission is hereby granted, free of charge, to any person obtaining a copy
| of this software and associated documentation files (the "Software"), to deal
| in the Software without restriction, including without limitation the rights
| to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
| copies of the Software, and to permit persons to whom the Software is
| furnished to do so, subject to the following conditions:
|
| The above copyright notice and this permission notice shall be included in
| all copies or substantial portions of the Software.
|
| THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
| IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
| FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
| AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
| LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
| OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
| THE SOFTWARE.
|
| Version 1.0 - Written by Jim Hendricks, Biz Computing, Inc.
| - library method extended with $instantiate argument defaulted to TRUE.
| If this argument is FALSE, method will only load the class/
| - Added a module method. This method loads special purpose libraries
| that extend the module class and reside in the <application>/modules
| folder.
|
| NOTES:
| - Both extensions above rely on a private method _biz_load_class.
| - These extensions only check the application set of folders and does
| not fall back to CI system folders when not found in application
| folders.
| - Since modules are assumed to be an extension of the module class,
| a class called module must exist in your libraries folder. There
| are no requirements as to the structure of this class, only that
| it exists.
|
*******************************************************************/
class biz_Loader extends CI_Loader {
/*****************************************************************
| biz_Loader (constructor)
|
| Currently only exists to extend the default constructor to output
| a debug message.
|
| Version 1.0 - Written by Jim Hendricks, Biz Computing, Inc.
*******************************************************************/
function biz_Loader() {
parent::CI_Loader();
log_message('debug', "biz_Loader Class Initialized");
}
/*****************************************************************
| module
|
| Loader method for loading libraries that reside in the
| <application>/modules folder and extend the
| <application>/libraries/module library. It's current purpose is
| to act as a sub controller in a nested MVC. Sub Controllers are
| modules that can load their own view and model thru the hosting
| controller.
|
| arguments:
| - $module - Either a string with the name of 1 module to load
| or an array of module names to load multiple
| modules in 1 call.
| - $params - Arguments array to pass to a module when
| instantiating. If $module is an array, the
| same $params will be provided to each module.
| - $instantiate - Flag to supress instantiation. In it's default
| condition, module(s) will be loaded and instantiated.
| If this flag is passed as FALSE, module(s) will
| only be loaded.
|
| return:
| - FALSE if no module is provided, no return otherwise.
|
| Version 1.0 - Written by Jim Hendricks, Biz Computing, Inc.
*******************************************************************/
function module($module = '', $params = NULL, $instantiate = TRUE) {
// 1st load module class
$this->library('module', NULL, FALSE);
if ($module == '') {
return FALSE;
}
if( !is_array($module) ) {
$module = array( $module );
}
foreach ($module as $class) {
$result = $this->_biz_load_class($class, 'modules/');
if( $instantiate && $result !== 'dupe' ) {
$this->_ci_init_class($class, '', $params);
$this->_ci_assign_to_models();
}
}
}
/*****************************************************************
| library
|
| Method that is identical to the CI system loader library method
| except an additional argument is passed that allows supression
| of instantiation of the loaded class.
|
| arguments:
| - $library - Either a string with the name of 1 library to load
| or an array of library names to load multiple
| libraries in 1 call.
| - $params - Arguments array to pass to a library when
| instantiating. If $library is an array, the
| same $params will be provided to each library.
| - $instantiate - Flag to supress instantiation. In it's default
| condition, library(s) will be loaded and instantiated.
| If this flag is passed as FALSE, libary(s) will
| only be loaded.
|
| return:
| - FALSE if no library is provided, no return otherwise.
|
| Version 1.0 - Written by Jim Hendricks, Biz Computing, Inc.
*******************************************************************/
function library($library = '', $params = NULL, $instantiate = TRUE) {
if( $instantiate ) {
parent::library( $library, $params );
} else {
if ($library == '') {
return FALSE;
}
if (is_array($library)) {
foreach ($library as $class) {
$this->_biz_load_class($class);
}
} else {
$this->_biz_load_class($library);
}
}
}
/*****************************************************************
| _biz_load_class
|
| Private method for performance of actual loading of libraries and
| modules loaded via biz_Loader extended functions. This is actually
| a copy of _ci_load_class with subclassing, instantiation, and
| system class loading removed. Additionally a path was added
| to allow loading of classes from paths other than the default
| <application>/libraries folder.
|
| arguments:
| - $class - Name of class to load
| - $path - <application> subfolder from where to load class
|
| return:
| - 'dupe' if loaded class is already loaded, nothing returned otherwise.
|
| Version 1.0 - Written by Jim Hendricks, Biz Computing, Inc.
*******************************************************************/
function _biz_load_class($class, $path = 'libraries/' ) {
// Get the class name
$class = str_replace(EXT, '', $class);
// We'll test for both lowercase and capitalized versions of the file name
foreach (array(ucfirst($class), strtolower($class)) as $class) {
// Lets search for the requested library file and load it.
$is_duplicate = FALSE;
$filepath = APPPATH.$path.$class.EXT;
// Does the file exist? No? Bummer...
if ( ! file_exists($filepath)) {
continue;
}
// Safety: Was the class already loaded by a previous call?
if (in_array($filepath, $this->_ci_classes)) {
$is_duplicate = TRUE;
log_message('debug', $class." class already loaded. Second attempt ignored.");
return 'dupe';
}
include($filepath);
$this->_ci_classes[] = $filepath;
return;
} // END FOREACH
// If we got this far we were unable to find the requested class.
// We do not issue errors if the load call failed due to a duplicate request
if ($is_duplicate == FALSE) {
log_message('error', "Unable to load the requested class: ".$class);
show_error("Unable to load the requested class: ".$class);
}
}
}
?>
<?
/*****************************************************************
| module.php
|
| Copyright (c) 2008, Biz Computing, Inc.
|
| Permission is hereby granted, free of charge, to any person obtaining a copy
| of this software and associated documentation files (the "Software"), to deal
| in the Software without restriction, including without limitation the rights
| to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
| copies of the Software, and to permit persons to whom the Software is
| furnished to do so, subject to the following conditions:
|
| The above copyright notice and this permission notice shall be included in
| all copies or substantial portions of the Software.
|
| THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
| IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
| FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
| AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
| LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
| OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
| THE SOFTWARE.
|
| Module acts as a controller for a simulated nested MVC
|
| Module should be subclassed. Actual load of module should be
| via customized Loader library call with $instantiate set to FALSE
| This will load Module as just a class def and will then allow
| subclassed models to load as normal library loads but will still
| be able to locate the base class.
|
| -- method index should be extended to provide display controller
| -- method submit should be extended to provide handling of form
| submission
| -- method validate should be extended to provide any validations
| -- method save should be extended to provide actual save code
|
| refer to the comments on each method for more detailed use
|
*******************************************************************/
class module {
// reference to parent controller
var $ci;
/*****************************************************************
| module (constructor)
|
| setup standard module
|
| Subclasses should add additional initializations needed by
| more than one of modules methods.
|
| Version 1.0 - Written by Jim Hendricks, Biz Computing, Inc.
*******************************************************************/
function module() {
$this->ci =& get_instance();
}
/*****************************************************************
| index
|
| method should be called by parent controller to produce the
| modules view
|
| args:
| $data - optional array of parameters needed by the module
| direct access to base controller properties also
| available via $this->ci->
|
| returns:
| key/value array of any data needed by parent controller
| standard keys:
| -- 'view' - actual html text to add to parent view
| -- 'message' - array of messages
|
| Version 1.0 - Written by Jim Hendricks, Biz Computing, Inc.
*******************************************************************/
function index( $data = array() ) {
}
/*****************************************************************
| submit
|
| method should be called by parent controller to handle form
| submission. Parent controller will only call module submit
| if action variable does not match a parent controller action.
|
| args:
| $action - Action command stripped from pressed submit button
| through get_form_action() - this then assumes
| that submit buttons follow the action[module_command]
| naming convention.
| $data - optional array of parameters needed by the module
| direct access to base controller properties also
| available via $this->ci->
|
| returns:
| key/value array of any data needed by parent controller
| standard keys:
| -- 'result' - 'handled', 'handled_redisplay', 'not_handled'
| -- 'message' - array of messages
|
| Version 1.0 - Written by Jim Hendricks, Biz Computing, Inc.
*******************************************************************/
function submit( $action, $data = array() ) {
}
/*****************************************************************
| validate
|
| method should be called by parent controller to validate data
| module submit validations should call this method.
|
| args:
| $data - optional array of parameters needed by the module
| direct access to base controller properties also
| available via $this->ci->
|
| returns:
| key/value array of any data needed by parent controller
| standard keys:
| -- 'valid' - TRUE/FALSE
| -- 'message' - array of messages
|
| Version 1.0 - Written by Jim Hendricks, Biz Computing, Inc.
*******************************************************************/
function validate( $data = array() ) {
}
/*****************************************************************
| save
|
| method should be called by parent controller to save module data
| module submit saves should call this method.
|
| args:
| $data - optional array of parameters needed by the module
| direct access to base controller properties also
| available via $this->ci->
|
| returns:
| key/value array of any data needed by parent controller
| standard keys:
| -- 'save' - TRUE/FALSE
| -- 'message' - array of messages
|
| Version 1.0 - Written by Jim Hendricks, Biz Computing, Inc.
*******************************************************************/
function save( $data = array() ) {
}
}
?>