Remove "HeraldRepetitionPolicyConfig" and hide storage details inside HeraldRule

Summary:
Depends on D18925. Ref T13048. Currently, HeraldRule stores policies as integers (0 or 1) in the database.

The application tries to mostly use strings ("first", "every"), but doesn't do a good job of hiding the fact that the values are integers deeper in the stack. So we end up with a lot of code like this:

```lang=php
$stored_int_value = $rule->getRepetitionPolicy();
$equivalent_string = HeraldRepetitionPolicyConfig::getString($stored_int_value);
$is_first = ($equivalent_string === HeraldRepetitionPolicyConfig::FIRST);
```

This happens in several places and is generally awful. Replace it with:

```lang=php
$is_first = $rule->isRepeatFirst();
```

To do this, merge `HeraldRepetitionPolicyConfig` into `HeraldRule` and hide all the mess inside the methods.

(This may let us just get rid of the integers in a later change, although I'm not sure I want to commit to that.)

Test Plan:
  - Grepped for `HeraldRepetitionPolicyConfig`, no more hits.
  - Grepped for `setRepetitionPolicy(...)` and `getRepetitionPolicy(...)`. There are no remaining callers outside of `HeraldRule`.
  - Browed and edited several rules. I'll vet this more convincingly after adding the new repetition rule.

Reviewers: amckinley

Reviewed By: amckinley

Maniphest Tasks: T13048

Differential Revision: https://secure.phabricator.com/D18926

src/__phutil_library_map__.php

@@ -1399,7 +1399,6 @@ phutil_register_library_map(array(
     'HeraldRelatedFieldGroup' => 'applications/herald/field/HeraldRelatedFieldGroup.php',
     'HeraldRemarkupFieldValue' => 'applications/herald/value/HeraldRemarkupFieldValue.php',
     'HeraldRemarkupRule' => 'applications/herald/remarkup/HeraldRemarkupRule.php',
-    'HeraldRepetitionPolicyConfig' => 'applications/herald/config/HeraldRepetitionPolicyConfig.php',
     'HeraldRule' => 'applications/herald/storage/HeraldRule.php',
     'HeraldRuleController' => 'applications/herald/controller/HeraldRuleController.php',
     'HeraldRuleDatasource' => 'applications/herald/typeahead/HeraldRuleDatasource.php',
@@ -6602,7 +6601,6 @@ phutil_register_library_map(array(
     'HeraldRelatedFieldGroup' => 'HeraldFieldGroup',
     'HeraldRemarkupFieldValue' => 'HeraldFieldValue',
     'HeraldRemarkupRule' => 'PhabricatorObjectRemarkupRule',
-    'HeraldRepetitionPolicyConfig' => 'Phobject',
     'HeraldRule' => array(
       'HeraldDAO',
       'PhabricatorApplicationTransactionInterface',

src/applications/herald/adapter/HeraldAdapter.php

@@ -766,14 +766,14 @@ abstract class HeraldAdapter extends Phobject {
   public function getRepetitionOptions() {
     $options = array();
 
-    $options[] = HeraldRepetitionPolicyConfig::EVERY;
+    $options[] = HeraldRule::REPEAT_EVERY;
 
     // Some rules, like pre-commit rules, only ever fire once. It doesn't
     // make sense to use state-based repetition policies like "only the first
     // time" for these rules.
 
     if (!$this->isSingleEventAdapter()) {
-      $options[] = HeraldRepetitionPolicyConfig::FIRST;
+      $options[] = HeraldRule::REPEAT_FIRST;
     }
 
     return $options;
@@ -897,10 +897,7 @@ abstract class HeraldAdapter extends Phobject {
         ));
     }
 
-    $integer_code_for_every = HeraldRepetitionPolicyConfig::toInt(
+    if ($rule->isRepeatEvery()) {
-      HeraldRepetitionPolicyConfig::EVERY);
-
-    if ($rule->getRepetitionPolicy() == $integer_code_for_every) {
       $action_text =
         pht('Take these actions every time this rule matches:');
     } else {

src/applications/herald/config/HeraldRepetitionPolicyConfig.php

@@ -1,28 +0,0 @@
-<?php
-
-final class HeraldRepetitionPolicyConfig extends Phobject {
-
-  const FIRST   = 'first';  // only execute the first time (no repeating)
-  const EVERY   = 'every';  // repeat every time
-
-  private static $policyIntMap = array(
-    self::FIRST   => 0,
-    self::EVERY   => 1,
-  );
-
-  public static function getMap() {
-    return array(
-      self::EVERY   => pht('every time'),
-      self::FIRST   => pht('only the first time'),
-    );
-  }
-
-  public static function toInt($str) {
-    return idx(self::$policyIntMap, $str, self::$policyIntMap[self::EVERY]);
-  }
-
-  public static function toString($int) {
-    return idx(array_flip(self::$policyIntMap), $int, self::EVERY);
-  }
-
-}

src/applications/herald/controller/HeraldRuleController.php

@@ -373,8 +373,7 @@ final class HeraldRuleController extends HeraldController {
     // mutate current rule, so it would be sent to the client in the right state
     $rule->setMustMatchAll((int)$match_all);
     $rule->setName($new_name);
-    $rule->setRepetitionPolicy(
+    $rule->setRepetitionPolicyStringConstant($repetition_policy_param);
-      HeraldRepetitionPolicyConfig::toInt($repetition_policy_param));
     $rule->attachConditions($conditions);
     $rule->attachActions($actions);
 
@@ -594,11 +593,10 @@ final class HeraldRuleController extends HeraldController {
    * time) this rule matches..." element.
    */
   private function renderRepetitionSelector($rule, HeraldAdapter $adapter) {
-    $repetition_policy = HeraldRepetitionPolicyConfig::toString(
+    $repetition_policy = $rule->getRepetitionPolicyStringConstant();
-      $rule->getRepetitionPolicy());
 
     $repetition_options = $adapter->getRepetitionOptions();
-    $repetition_names = HeraldRepetitionPolicyConfig::getMap();
+    $repetition_names = HeraldRule::getRepetitionPolicySelectOptionMap();
     $repetition_map = array_select_keys($repetition_names, $repetition_options);
 
     if (count($repetition_map) < 2) {

src/applications/herald/editor/HeraldRuleEditor.php

@@ -66,8 +66,10 @@ final class HeraldRuleEditor
         $object->setMustMatchAll((int)$new_state['match_all']);
         $object->attachConditions($new_state['conditions']);
         $object->attachActions($new_state['actions']);
-        $object->setRepetitionPolicy(
+
-          HeraldRepetitionPolicyConfig::toInt($new_state['repetition_policy']));
+        $new_repetition = $new_state['repetition_policy'];
+        $object->setRepetitionPolicyStringConstant($new_repetition);
+
         return $object;
     }
 

src/applications/herald/editor/HeraldRuleSerializer.php

@@ -9,7 +9,7 @@ final class HeraldRuleSerializer extends Phobject {
       (bool)$rule->getMustMatchAll(),
       $rule->getConditions(),
       $rule->getActions(),
-      HeraldRepetitionPolicyConfig::toString($rule->getRepetitionPolicy()));
+      $rule->getRepetitionPolicyStringConstant());
   }
 
   public function serializeRuleComponents(

src/applications/herald/engine/HeraldEngine.php

@@ -68,9 +68,7 @@ final class HeraldEngine extends Phobject {
     foreach ($rules as $phid => $rule) {
       $this->stack = array();
 
-      $policy_first = HeraldRepetitionPolicyConfig::FIRST;
+      $is_first_only = $rule->isRepeatFirst();
-      $policy_first_int = HeraldRepetitionPolicyConfig::toInt($policy_first);
-      $is_first_only = ($rule->getRepetitionPolicy() == $policy_first_int);
 
       try {
         if (!$this->getDryRun() &&
@@ -175,8 +173,6 @@ final class HeraldEngine extends Phobject {
 
     $rules = mpull($rules, null, 'getID');
     $applied_ids = array();
-    $first_policy = HeraldRepetitionPolicyConfig::toInt(
-      HeraldRepetitionPolicyConfig::FIRST);
 
     // Mark all the rules that have had their effects applied as having been
     // executed for the current object.
@@ -194,7 +190,7 @@ final class HeraldEngine extends Phobject {
         continue;
       }
 
-      if ($rule->getRepetitionPolicy() == $first_policy) {
+      if ($rule->isRepeatFirst()) {
         $applied_ids[] = $rule_id;
       }
     }

src/applications/herald/storage/HeraldRule.php

@@ -30,6 +30,9 @@ final class HeraldRule extends HeraldDAO
   private $actions;
   private $triggerObject = self::ATTACHABLE;
 
+  const REPEAT_EVERY = 'every';
+  const REPEAT_FIRST = 'first';
+
   protected function getConfiguration() {
     return array(
       self::CONFIG_AUX_PHID => true,
@@ -254,6 +257,74 @@ final class HeraldRule extends HeraldDAO
   }
 
 
+/* -(  Repetition Policies  )------------------------------------------------ */
+
+
+  public function getRepetitionPolicyStringConstant() {
+    $map = self::getRepetitionPolicyMap();
+    $map = ipull($map, 'key.string', 'key.int');
+
+    return idx($map, $this->getRepetitionPolicyIntegerConstant());
+  }
+
+  public function getRepetitionPolicyIntegerConstant() {
+    $map = self::getRepetitionPolicyMap();
+    $map = ipull($map, 'key.int', 'key.int');
+    $int = $this->getRepetitionPolicy();
+
+    if (!isset($map[$int])) {
+      return head_key($map);
+    }
+
+    return $int;
+  }
+
+  public function setRepetitionPolicyStringConstant($value) {
+    $map = self::getRepetitionPolicyMap();
+    $map = ipull($map, 'key.int', 'key.string');
+
+    if (!isset($map[$value])) {
+      throw new Exception(
+        pht(
+          'Rule repetition string constant "%s" is unknown.',
+          $value));
+    }
+
+    $int = $map[$value];
+
+    return $this->setRepetitionPolicy($int);
+  }
+
+  public function isRepeatEvery() {
+    return ($this->getRepetitionPolicyStringConstant() === self::REPEAT_EVERY);
+  }
+
+  public function isRepeatFirst() {
+    return ($this->getRepetitionPolicyStringConstant() === self::REPEAT_FIRST);
+  }
+
+  public static function getRepetitionPolicySelectOptionMap() {
+    $map = self::getRepetitionPolicyMap();
+    $map = ipull($map, 'select', 'key.string');
+    return $map;
+  }
+
+  private static function getRepetitionPolicyMap() {
+    return array(
+      self::REPEAT_EVERY => array(
+        'key.int' => 1,
+        'key.string' => self::REPEAT_EVERY,
+        'select' => pht('every time'),
+      ),
+      self::REPEAT_FIRST => array(
+        'key.int' => 0,
+        'key.string' => self::REPEAT_FIRST,
+        'select' => pht('only the first time'),
+      ),
+    );
+  }
+
+
 /* -(  PhabricatorApplicationTransactionInterface  )------------------------- */