SAAS-973: Airtime Billing page - Add support for August promotion plans

Fix to not allow current promo plans to downgrade to another promo plan
Added promo banner to billing page

airtime_mvc/application/common/Billing.php

@@ -419,12 +419,25 @@ class Billing
         $currentPlanProductId = $currentPlanProduct["pid"];
         $currentPlanBillingCycle = strtolower($currentPlanProduct["billingcycle"]);
 
+        if (self::isClientOnAwesomeAugustPromoPlan($currentPlanProductId)) {
+
+            $newEligiblePromoId = self::getEligibleAwesomeAugustPromoPlanId(
+                self::getProductName($newProductId)
+            );
+
+            if ($newProductBillingCycle == "annually" || $newEligiblePromoId > $currentPlanProductId) {
+                return true;
+            } else {
+                return false;
+            }
+        }
+
         // if client is on trial plan, YES
         if ($currentPlanProductId == AIRTIME_PRO_FREE_TRIAL_PLAN_ID) {
             return true;
         }
 
-        // if client is currently on monthly or annually or old plan AND (upgrading OR  upgrading/downgrading to annual plan), YES
+        // if client is currently on monthly or annually or old/free plan AND (upgrading OR  upgrading/downgrading to annual plan), YES
         if ($currentPlanBillingCycle == "monthly" || $currentPlanBillingCycle == "free account"
             || $currentPlanBillingCycle == "annually") {
             // is the client changing billing cycle to annual?
@@ -433,8 +446,8 @@ class Billing
             }
 
             // Is the client staying on monthly and upgrading?
-            // This won't hold true if the client is on an old plan because the old
+            // This won't hold true if the client is on an old/free plan because the
-            // plan ids are higher than the current plan ids.
+            // old/free plan ids are higher than the current paid plan ids.
             if ($newProductBillingCycle == "monthly" && $newProductId > $currentPlanProductId) {
                 return true;
             }
@@ -449,4 +462,17 @@ class Billing
         return false;
     }
 
+    public static function isClientOnAwesomeAugustPromoPlan($currentPlanId)
+    {
+        $promoPlans = self::getAwesomeAugustPromoProducts();
+
+        foreach ($promoPlans as $k => $p) {
+            if ($p["pid"] == $currentPlanId) {
+                return true;
+            }
+        }
+
+        return false;
+    }
+
 }

airtime_mvc/application/views/scripts/billing/upgrade.phtml

@@ -196,6 +196,10 @@ $(document).ready(function() {
 <div class="ui-widget ui-widget-content block-shadow clearfix padded-strong billing-panel">
 <H2><?=_("Account Plans")?></H2>
 <H4><?=_("Upgrade today to get more listeners and storage space!")?></H4>
+<div>
+        <a href="https://www.airtime.pro/pricing#promo-details" target="_blank">
+            <img width="400px" height="133px" class="promo-banner" /></a>
+    </div>
 <div class="pricing-grid">
     <table>
         <tr>

airtime_mvc/public/css/billing.css

@@ -246,3 +246,8 @@
 	border-radius: 5px;
 	color: #ffffff;
 }
+
+.promo-banner {
+	margin-top:10px;
+	background: url('images/august_aweomse_promo_banner.png') no-repeat;
+}