Programmatically create a cart price rule in Magento

cart_price_rule_1_steps.txt

This is a quick an easy hack to programmatically create a cart price rule.

1. Temporarely edit Mage_Adminhtml_Promo_QuoteController::saveAction()

2. Around line 123, you will find $data = $this->getRequest()->getPost();

3. Below this line create a new line containing :
var_export($data);
die();

4. Go to the admin panel and create a cart promo rule as you want it to be

5. Save it and then the code created at step 3 will throw you the data as it has been posted on the step 4 form.

6. Copy the thrown code

7. Rollback steps 1, 2, 3.

8. Use the code method supplied in the cart_price_rule_setup.php file of this gist to create the rule based on code copied at step 6

cart_price_rule_2_setup.php

<?php
$data = ARRAY_PASTED_FROM_STEP_6;

$model = Mage::getModel('salesrule/rule');

if (isset($data['rule_id'])) {
    $model->load($data['rule_id']);
}

if (isset($data['simple_action']) && $data['simple_action'] == 'by_percent'
    && isset($data['discount_amount'])
) {
    $data['discount_amount'] = min(100, $data['discount_amount']);
}
if (isset($data['rule']['conditions'])) {
    $data['conditions'] = $data['rule']['conditions'];
}
if (isset($data['rule']['actions'])) {
    $data['actions'] = $data['rule']['actions'];
}
unset($data['rule']);
$model->loadPost($data);

$useAutoGeneration = (int)!empty($data['use_auto_generation']);
$model->setUseAutoGeneration($useAutoGeneration);

$model->save();