Modernize "mailKey" on Fund initiatives

Summary: Ref T13065. Migrate "mailKey" and drop the column.

Test Plan: Ran "bin/storage upgrade", got a clean upgrade, saw migrated values in mail properties table.

Subscribers: PHID-OPKG-gm6ozazyms6q6i22gyam

Maniphest Tasks: T13065

Differential Revision: https://secure.phabricator.com/D21634

resources/sql/autopatches/20210316.almanac.15.intiative-mailkey.php

@@ -0,0 +1,28 @@
+<?php
+
+$initiative_table = new FundInitiative();
+$initiative_conn = $initiative_table->establishConnection('w');
+
+$properties_table = new PhabricatorMetaMTAMailProperties();
+$conn = $properties_table->establishConnection('w');
+
+$iterator = new LiskRawMigrationIterator(
+  $initiative_conn,
+  $initiative_table->getTableName());
+
+foreach ($iterator as $row) {
+  queryfx(
+    $conn,
+    'INSERT IGNORE INTO %R
+        (objectPHID, mailProperties, dateCreated, dateModified)
+      VALUES
+        (%s, %s, %d, %d)',
+    $properties_table,
+    $row['phid'],
+    phutil_json_encode(
+      array(
+        'mailKey' => $row['mailKey'],
+      )),
+    PhabricatorTime::getNow(),
+    PhabricatorTime::getNow());
+}

resources/sql/autopatches/20210316.almanac.16.initiative-dropmailkey.sql

@@ -0,0 +1,2 @@
+ALTER TABLE {$NAMESPACE}_fund.fund_initiative
+  DROP mailKey;

src/applications/fund/storage/FundInitiative.php

@@ -22,7 +22,6 @@ final class FundInitiative extends FundDAO
   protected $editPolicy;
   protected $status;
   protected $totalAsCurrency;
-  protected $mailKey;
 
   private $projectPHIDs = self::ATTACHABLE;
 
@@ -62,7 +61,6 @@ final class FundInitiative extends FundDAO
         'status' => 'text32',
         'merchantPHID' => 'phid?',
         'totalAsCurrency' => 'text64',
-        'mailKey' => 'bytes20',
       ),
       self::CONFIG_APPLICATION_SERIALIZERS => array(
         'totalAsCurrency' => new PhortuneCurrencySerializer(),
@@ -78,8 +76,8 @@ final class FundInitiative extends FundDAO
     ) + parent::getConfiguration();
   }
 
-  public function generatePHID() {
+  public function getPHIDType() {
-    return PhabricatorPHID::generateNewPHID(FundInitiativePHIDType::TYPECONST);
+    return FundInitiativePHIDType::TYPECONST;
   }
 
   public function getMonogram() {
@@ -103,13 +101,6 @@ final class FundInitiative extends FundDAO
     return ($this->getStatus() == self::STATUS_CLOSED);
   }
 
-  public function save() {
-    if (!$this->mailKey) {
-      $this->mailKey = Filesystem::readRandomCharacters(20);
-    }
-    return parent::save();
-  }
-
 
 /* -(  PhabricatorPolicyInterface  )----------------------------------------- */