Project

General

Profile

Plugin system » History » Version 17

Valérie Isaksen, 06/11/2011 03:23 PM

1 10 Oscar van Eijk
{{>toc}}
2
3 1 Oscar van Eijk
h1. Plugin system
4
5 5 Oscar van Eijk
Since VirtueMart v2, the Joomla! plugin system is used form payment and shipper plugins.
6 1 Oscar van Eijk
7
h2. Installing plugins
8
9
During development the the VM2 branch, the plugins are not available as Joomla install packages, so for test environments, they must be installed manually.
10
11
h3. Payment plugins
12
13
At the time of writing, only 2 of the former payment plugins have been converted to the new plugin system. Others should follow soon, all help is appreciated!!
14
15
Use the SQL query below to add the plugins to your database (assuming the table prefix is "jos_"):
16
17 12 Christopher Roussel
J1.5:
18 1 Oscar van Eijk
<pre>
19 4 Devendra Kumar Shukla
INSERT INTO `jos_plugins` (`id`, `name`, `element`, `folder`, `access`, `ordering`
20 1 Oscar van Eijk
  , `published`, `iscore`, `client_id`, `checked_out`, `checked_out_time`, `params`)
21
VALUES
22
 (NULL, 'VMPayment - Authorize', 'authorize', 'vmpayment', 0, 0, 1, 0, 0, 0, '0000-00-00 00:00:00', '')
23 12 Christopher Roussel
,(NULL, 'VMPayment - Cash on delivery', 'cashondel', 'vmpayment', 0, 0, 1, 0, 0, 0, '0000-00-00 00:00:00','');
24 1 Oscar van Eijk
</pre>
25 12 Christopher Roussel
J1.6:
26
<pre>
27
INSERT INTO `jos_extensions` (`extension_id`,  `type`, `name`, `element`, `folder`, `access`, `ordering`
28
  , `enabled`, `protected`, `client_id`, `checked_out`, `checked_out_time`, `params`)
29
VALUES
30
 (NULL, 'plugin', 'plg_vmpayment_authorize', 'authorize', 'vmpayment', 1, 0, 1, 0, 0, 0, '0000-00-00 00:00:00', '')
31
,(NULL, 'plugin', 'plg_vmpayment_cashondel', 'cashondel', 'vmpayment', 1, 0, 1, 0, 0, 0, '0000-00-00 00:00:00','');
32
</pre>
33 1 Oscar van Eijk
34 13 Max Milbers
Next, when you did not use the svn checkout, copy the plugin files (authorize.php, authorize.xml, cashondel.php and cashondel.xml), located in the folder /plugins/vmpayment, to the Joomla plugin directory. If that doesn't exist, it must be created first.
35 1 Oscar van Eijk
36
Now, in the store maintenance, you can add payment methods based on one of these plugins. Note at this moment it is required to select a vendor!
37
38
h3. Shipper plugins
39 3 Oscar van Eijk
40 1 Oscar van Eijk
This is very similar to the payment plugins. Only 1 plugin has been created (again: all help is appreciated!); 'standard', which provides a basic shipping option for postal services.
41
*Note:* Installing the sample data does _NOT_ provide shipping rates anymore!
42
43
Use the SQL query below to add the plugins to your database (assuming the table prefix is "jos_"):
44
45 12 Christopher Roussel
J1.5:
46 1 Oscar van Eijk
<pre>
47
INSERT INTO `jos_plugins` (`id`, `name`, `element`, `folder`, `access`, `ordering`
48
  , `published`, `iscore`, `client_id`, `checked_out`, `checked_out_time`, `params`)
49
VALUES
50 17 Valérie Isaksen
 (NULL, 'By weight, ZIP and countries', 'weight_countries', 'vmshipper', 0, 0, 1, 0, 0, 0, '0000-00-00 00:00:00', '')
51 16 Valérie Isaksen
,(NULL, 'By products and countries', 'products_countries', 'vmshipper', 0, 0, 1, 0, 0, 0, '0000-00-00 00:00:00', '')
52 14 Valérie Isaksen
;
53 1 Oscar van Eijk
</pre>
54
55 12 Christopher Roussel
J1.6: 
56
<pre>
57
INSERT INTO `jos_extensions` (`extension_id`, `type`, `name`, `element`, `folder`, `access`, `ordering`
58 1 Oscar van Eijk
  , `enabled`, `protected`, `client_id`, `checked_out`, `checked_out_time`, `params`)
59
VALUES
60 16 Valérie Isaksen
 (NULL, 'plugin', 'plg_vmshipper_weight_countries', 'weight_countries', 'vmshipper', 1, 0, 1, 0, 0, 0, '0000-00-00 00:00:00', '')
61
,(NULL, 'plugin', 'plg_vmshipper_products_countries', 'products_countries', 'vmshipper', 1, 0, 1, 0, 0, 0, '0000-00-00 00:00:00', '')
62 14 Valérie Isaksen
;
63 12 Christopher Roussel
</pre>
64 13 Max Milbers
Next, when you did not use the svn checkout, copy the plugin files (standard.php and standard.xml), located in the folder /plugins/vmshipper, to the Joomla plugin directory. If that doesn't exist, it must be created first.
65 1 Oscar van Eijk
66
Now use the 'Shipping' menu item in the backend to add 1 or more carriers based on this plugin. All you need to do here is give the shipper a name and select a vendor (this is optional; when no vendor is selected, this carrier is valid for all vendors).
67 15 Valérie Isaksen
Finally you can add the shipping rates for the created vendor. Make sure a there's always a valid shipping rate: customers select the carrier only and the plugin must be able to find a matching rate based on the total order weight and the shipto address!
68 1 Oscar van Eijk
69 5 Oscar van Eijk
h2. Plugin Development
70 1 Oscar van Eijk
71 5 Oscar van Eijk
All plugins for VirtueMart should be developed confirming the Joomla! plugin development methods. Refer to http://docs.joomla.org/Tutorial:Plugins for developers documentation for Joomla! plugins.
72
73
h3. Payment Plugins
74
75 7 Oscar van Eijk
Payment plugins are used both in the front-end and the backend. They must be created as classes deriving from the base class *vmPaymentPlugin*:
76 9 Oscar van Eijk
<pre><code class="php">
77 7 Oscar van Eijk
class plgVmPayment<myPlugin> extends vmPaymentPlugin {
78
	function plgVmPayment<myPlugin>(&$subject, $config) {
79
		$this->_pelement = basename(__FILE__, '.php');	// Required!
80
		$this->_createTable();				// Required, see below
81
		parent::__construct($subject, $config);
82
	}
83
}
84 9 Oscar van Eijk
</code></pre>
85 7 Oscar van Eijk
86
Below is the list with events and a description on what moment they are fired.
87 6 Oscar van Eijk
* *plgVmOnSelectPayment()* - This event is fired during the checkout process. It allows the shopper to select one of the available payment methods.
88 5 Oscar van Eijk
It should display a radio button (name: paym_id) to select the payment method. Other information (like credit card info) might be selected as well, depending on the plugin.
89
+Return:+
90
It must return the HTML code for displaying the form (radio button and optional extra selections).
91
+Parameters:+
92
# (VirtueMartCart object) The cart object 
93
# (integer, default 0) ID of an already selected payment method ID, if any
94
95 6 Oscar van Eijk
* *plgVmOnPaymentSelectCheck()* - This event is fired after the payment method has been selected. It can be used to store
96 5 Oscar van Eijk
additional payment info in the cart.
97
+Return:+
98
Plugins that were not selected must return null, otherwise True of False must be returned indicating Success or Failure.
99
+Parameters:+
100
# (VirtueMartCart object) The cart object 
101
102 10 Oscar van Eijk
103
104 6 Oscar van Eijk
* *plgVmOnCheckoutCheckPaymentData()* - This event is fired during the checkout process. It can be used to validate the payment data as entered by the user.
105 5 Oscar van Eijk
+Return:+
106
Plugins that were not selected must return null, otherwise True of False must be returned indicating Success or Failure.
107
+Parameters:+
108
None
109
110 6 Oscar van Eijk
* *plgVmOnConfirmedOrderStorePaymentData()* - This event is fired after the payment has been processed; it stores the payment method-specific data.
111 5 Oscar van Eijk
All plugins _must_ reimplement this method.
112
+Return:+
113
If the plugin is NOT actually executed (not the selected payment method), this method must return NULL
114
If this plugin IS executed, it MUST return the order status code that the order should get. This triggers the stock updates if required
115
+Parameters:+
116
# (integer) The ordernumber being processed
117
# (object) Data from the cart
118
# (array) Price information for this order
119
	
120 6 Oscar van Eijk
* *plgVmOnShowOrderPaymentBE()* - This method is fired when showing the order details in the backend. It displays the the payment method-specific data.
121 5 Oscar van Eijk
All plugins _must_ reimplement this method.
122
+Return:+
123
Null when for payment methods that were not selected, text (HTML) otherwise
124
+Parameters:+
125
# (integer) The order ID
126
# (integer) Payment method used for this order
127
128 6 Oscar van Eijk
* *plgVmOnCancelPayment()* - This event is fired each time the status of an order is changed to Cancelled. It can be used to refund payments, void authorization etc.
129 5 Oscar van Eijk
When reimplementing this methis, the body _must_ start with this code:
130 9 Oscar van Eijk
<pre><code class="php">$_paymethodID = $this->getPaymentMethodForOrder($_orderID);
131 5 Oscar van Eijk
if (!$this->selectedThisMethod($this->_pelement, $_paymethodID)) {
132
	return;
133 9 Oscar van Eijk
}</code></pre>
134 5 Oscar van Eijk
+Parameters:+
135
 (integer The order ID
136
 (char) Previous order status
137
 (char) New order status
138
139 6 Oscar van Eijk
* *plgVmOnShipOrderPayment()* - This event is fired when the status of an order is changed to Shipped. It can be used to confirm or capture payments
140 5 Oscar van Eijk
When reimplementing this methis, the body _must_ start with this code:
141 9 Oscar van Eijk
<pre><code class="php">$_paymethodID = $this->getPaymentMethodForOrder($_orderID);
142 5 Oscar van Eijk
if (!$this->selectedThisMethod($this->_pelement, $_paymethodID)) {
143
	return;
144 9 Oscar van Eijk
}</code></pre>
145 5 Oscar van Eijk
+Return:+
146
True on success, False on failure, Null if this plugin was not activated
147
+Parameters:+
148 1 Oscar van Eijk
# (integer) Order ID
149 7 Oscar van Eijk
150
Other helper functions inherited from the base class:
151
152 9 Oscar van Eijk
* *_ createTable()* - This method is used to create and maintain the plugin specific database table(s).
153 7 Oscar van Eijk
It _must_ be reimplemented by all plugins.
154 1 Oscar van Eijk
+Example:+
155 8 Oscar van Eijk
<pre><code class="php">
156 7 Oscar van Eijk
$_scheme = DbScheme::get_instance();
157
$_scheme->create_scheme('#__vm_order_payment_'.$this->_pelement);
158
$_schemeCols = array(
159
	 'id' => array (
160
			 'type' => 'int'
161
			,'length' => 11
162
			,'auto_inc' => true
163
			,'null' => false
164
	)
165
	,'order_id' => array (
166
			 'type' => 'int'
167
			,'length' => 11
168
			,'null' => false
169
	)
170
	,'payment_method_id' => array (
171
			 'type' => 'text'
172
			,'null' => false
173
	)
174
);
175
$_schemeIdx = array(
176
	 'idx_order_payment' => array(
177
			 'columns' => array ('order_id')
178
			,'primary' => false
179
			,'unique' => false
180
			,'type' => null
181
	)
182
);
183
$_scheme->define_scheme($_schemeCols);
184
$_scheme->define_index($_schemeIdx);
185
if (!$_scheme->scheme()) {
186
	JError::raiseWarning(500, $_scheme->get_db_error());
187
}
188
$_scheme->reset();
189 8 Oscar van Eijk
</code></pre>
190 7 Oscar van Eijk
191 8 Oscar van Eijk
* *getPaymentMethodForOrder()* - Get the order payment ID for a given order number
192 7 Oscar van Eijk
+Return:+
193
The payment method ID, or -1 when not found 
194
+Parameters:+
195
# (integer) The order ID
196
197 8 Oscar van Eijk
* *getThisMethodName()* - Get the name of the payment method.
198 7 Oscar van Eijk
This method can _not_ be reimplemented
199
+Return:+
200
Paymenent method name
201
+Parameters:+
202
# (integer) The payment method ID
203
204 8 Oscar van Eijk
* *selectedThisMethod()* - This method checks if the selected payment method matches the current plugin
205 7 Oscar van Eijk
+Return:+
206
True if the calling plugin has the given payment ID, False otherwise.
207
+Parameters:+
208
# (string) Element name, taken from the plugin filename
209
# (integer) The payment method ID
210
211 8 Oscar van Eijk
* *writePaymentData()* - This method writes all payment plugin specific data to the plugin's table
212 7 Oscar van Eijk
+Return:+
213
True if the calling plugin has the given payment ID, False otherwise.
214
+Parameters:+
215
# (array) Indexed array in the format 'column_name' => 'value'
216
# (string) Table name
217 10 Oscar van Eijk
218
h3. Shipper Plugins
219
220
Shipper plugins are used both in the front-end and the backend. They must be created as classes deriving from the base class *vmShipperPlugin*:
221
<pre><code class="php">
222
class plgVmShipper<myPlugin> extends vmShipperPlugin {
223
	function plgVmPayment<myPlugin>(&$subject, $config) {
224
		$this->_pelement = basename(__FILE__, '.php');	// Required!
225
		$this->_createTable();				// Required, see below
226
		parent::__construct($subject, $config);
227
	}
228
}
229
</code></pre>
230
231
Here's a short overview of the events:
232
* When a shopper selects a shipper, *plgOnSelectShipper()* is fired. It displays the shipper and can be used for collecting extra - shipper specific - info.
233
* After selecting, *plgVmShipperSelected()* can be used to store extra shipper info in the cart. The selected shipper ID will be stored in the cart by the checkout process before this method is fired.
234
* *plgOnConfirmShipper()* is fired when the order is confirmed and stored to the database. It is called before the rest of the order or stored, when reimplemented, it _must_ include a call to parent::plgOnConfirmShipper() (or execute the same steps to put all data in the cart)
235
236
When a stored order is displayed in the backend, the following events are used:
237
* *plgVmOnShowOrderShipperBE()* displays specific data about (a) shipment(s) (NOTE: this plugin is _OUTSIDE_ any form!)
238
* *plgVmOnShowOrderLineShipperBE()*) can be used to show information about a single orderline, e.g. display a package code at line level when more packages are shipped.
239
* *plgVmOnEditOrderLineShipperBE() can be used add a package code for an order line when more packages are shipped.
240
* *plgVmOnUpdateOrderShipperBE()* is fired inside a form. It can be used to add shipper data, like package code.
241
* *plgVmOnSaveOrderShipperBE()* is fired from the backend after the order has been saved. If one of the show methods above have to option to add or edit info, this method must be used to save the data.
242
* *plgVmOnUpdateOrderLine()* is fired from the backend after an order line has been saved. This method must be reimplemented if plgVmOnEditOrderLineShipperBE() is used.
243
244
The frontend 1 show method:
245
* plgVmOnShowOrderShipperFE() collects and displays specific data about (a) shipment(s)
246
247
Below is the list with events and a description on what moment they are fired.
248
249
* *plgVmOnSelectShipper()* - This event is fired during the checkout process. It allows the shopper to select one of the available shippers.
250
It should display a radio button (name: shipper_id) to select the shipper. In the description, the shipping cost can also be displayed, based on the total order weight and the shipto country (this wil be calculated again during order confirmation)
251
+Return:+
252
HTML code to display the form
253
+Parameters:+
254
# (VirtueMartCart object)  Cart object
255
# (integer, default 0) ID of the currently shipper selected
256
257
* *plgVmOnShipperSelected()* - This event is fired after the shipping method has been selected. It can be used to store additional shipper info in the cart.
258
+Return:+
259
True on succes, false on failures, null when this plugin was not selected.
260 1 Oscar van Eijk
On errors, JError::raiseWarning (or JError::raiseError) must be used to set a message.
261
+Parameters:+
262
# (VirtueMartCart object)  Cart object
263
# (integer, default 0) ID of the shipper selected
264 16 Valérie Isaksen
265
* *plgVmOnShipperSelectedCalculatePrice()* - This event is fired after the shipping method has been selected, and when calculating the cart prices.  
266
+Return:+
267
True on succes, false on failures, null when this plugin was not selected.
268
On errors, JError::raiseWarning (or JError::raiseError) must be used to set a message.
269
+Parameters:+
270
# (VirtueMartCart object)  Cart object
271
# (integer, default 0) ID of the shipper selected
272
# (array, default 0)  Shipping array containing: shipping_name, shipping_value, shipping_rate_vat_id, shipping_currency_id
273
274
275 10 Oscar van Eijk
276
* *plgVmOnConfirmShipper()* - This event is fired after the payment has been processed; it selects the actual shipping rate based on the shipto (country, zip) and/or order weight, and optionally writes extra info to the database (in which case this method must be reimplemented).
277
Reimplementation is not required, but when done, the following check MUST be made:
278
<pre><code class="php">
279
if (!$this->selectedThisShipper($this->_selement, $_cart->shipper_id)) {
280
	return null;
281
}</code></pre>
282
+Return:+
283
The shipping rate ID
284
Do _not_ return parent::plgVmOnConfirmShipper($_cart); it is valid but will produce extra overhead!
285
+Parameters:+
286
# (VirtueMartCart object) Cart object
287
288
* *plgVmOnShowOrderShipperBE()* - This method is fired when showing the order details in the backend. It displays the shipper-specific data.
289
NOTE, this plugin should NOT be used to display form fields, since it's called outside a form! Use *plgVmOnUpdateOrderBE()( instead!
290
+Return:+
291
Null for shippers that aren't active, text (HTML) otherwise
292
+Parameters:+
293
# (integer) The order ID
294
# (integer) Vendor ID
295
# (object) Object with 2 properties 'carrier' and 'name' 
296
297
* *plgVmOnEditOrderLineShipperBE()* - This method is fired when editing the order line details in the backend. It can be used to add line specific package codes
298
+Return:+
299
Null for shippers that aren't active, text (HTML) otherwise
300
+Parameters:+
301
# (integer) The order ID
302
# (integer) The order Line ID
303
304
* *plgVmOnUpdateOrderShipper()* - Save updated order data to the shipper specific table
305
+Return:+
306
True on success, false on failures (the rest of the save-process will be skipped!), or null when this shipper is not actived.
307
+Parameters:+
308
# (array) Form data
309
310
* *plgVmOnUpdateOrderLineShipper()* - Save updated orderline data to the shipper specific table
311
+Return:+
312
True on success, false on failures (the rest of the save-process will be skipped!), or null when this shipper is not actived.
313
+Parameters:+
314
# (array) Form data
315
316
* *plgVmOnShowOrderShipperFE()* - This method is fired when showing the order details in the frontend.  It displays the shipper-specific data.
317
+Return:+
318
Null for shippers that aren't active, text (HTML) otherwise
319
+Parameters:+
320
# (integer) The order ID
321
322
* *plgVmOnShowOrderLineShipperFE()* - This method is fired when showing the order details in the frontend, for every orderline. It can be used to display line specific package codes, e.g. with a link to external tracking and tracing systems
323
+Return:+
324
Null for shippers that aren't active, text (HTML) otherwise
325
+Parameters:+
326
# (integer) The order ID
327
# (integer) The order LineID
328
329
Other helper functions inherited from the base class:
330
331
* *_ createTable()* - This method is used to create and maintain the plugin specific database table(s).
332
It _must_ be reimplemented by all plugins.
333
+Example:+
334
<pre><code class="php">$_scheme = DbScheme::get_instance();
335
$_scheme->create_scheme('#__vm_order_shipper_'.$this->_selement);
336
$_schemeCols = array(
337
	 'id' => array (
338
			 'type' => 'int'
339
			,'length' => 11
340
			,'auto_inc' => true
341
			,'null' => false
342
	)
343
	,'order_id' => array (
344
			 'type' => 'int'
345
			,'length' => 11
346
			,'null' => false
347
	)
348
	,'shipper_id' => array (
349
			 'type' => 'text'
350
			,'null' => false
351
	)
352
);
353
$_schemeIdx = array(
354
	 'idx_order_payment' => array(
355
			 'columns' => array ('order_id')
356
			,'primary' => false
357
			,'unique' => false
358
			,'type' => null
359
	)
360
);
361
$_scheme->define_scheme($_schemeCols);
362
$_scheme->define_index($_schemeIdx);
363
if (!$_scheme->scheme()) {
364
	JError::raiseWarning(500, $_scheme->get_db_error());
365
}
366
$_scheme->reset();
367
</code></pre>
368
369
* *getThisShipperName()* -  Get the name of the shipper
370
+Return:+
371
Shipper name
372
+Parameters:+
373
# (integer) The Shipper ID
374
	final protected function ($_sid)
375
376
* *writeShipperData()* - This method writes all shipper plugin specific data to the plugin's table
377
+Parameters:+
378
# (array) Indexed array in the format 'column_name' => 'value'
379
# (string) Table name
380
381
* *getShippingRateIDForOrder()* - Get the shipping rate ID for a given order number
382
+Return:+
383
The shipping rate ID, or -1 when not found 
384
+Parameters:+
385
# (integer) The order ID
386
387
* *getShippingRate()* -  Get the total price for a shipping rate
388
+Return:+
389
Price in display format
390
+Parameters:+
391
# (integer) Shipping rate ID
392
	
393
* *getShipperIDForOrder()* - Get the shipper ID for a given order number
394
+Return:+
395
The shipper ID, or -1 when not found 
396
+Parameters:+
397
# (integer) The order ID
398
399
* *selectShippingRate()* - Select the shipping rate ID, based on the selected shipper in combination with the shipto address (country and zipcode) and the total order weight.
400
+Return:+
401
Shipping rate ID, -1 when no match is found. Only 1 selected ID will be returned; if more ID's match, the cheapest will be selected.
402
+Parameters:+
403
# (VirtueMartCart object) Cart object
404
# (integer, default 0) Shipper ID, by default taken from the cart
405
406
* *selectedThisShipper()* - This method checks if the selected shipper matches the current plugin
407
+Return:+
408
True if the calling plugin has the given payment ID
409
+Parameters:+
410
# (string) Element name, taken from the plugin filename
411
# (integer) The shipper ID
412
413
* *getOrderWeight()* - Get the total weight for the order, based on which the proper shipping rate can be selected.
414
+Return:+
415
Total weight for the order
416
+Parameters:+
417
# (VirtueMartCart object) Cart object
418
419
* *getCarriers()* - Fill an array with all carriers found with this plugin for the current vendor
420
+Return:+
421
True when carrier(s) was (were) found for this vendor, false otherwise
422
+Parameters:+
423
# (integer) The vendor ID taken from the cart.
424
425
* *validateVendor()* - Check if this shipper has carriers for the current vendor.
426
+Return:+
427
True when a shipper_id was found for this vendor, false otherwise
428
+Parameters:+
429
# (integer) The vendor ID taken from the cart.