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   1  <?php
   2  
   3  final class PhabricatorConfigKeySchema
   4    extends PhabricatorConfigStorageSchema {
   5  
   6    const MAX_INNODB_KEY_LENGTH = 767;
   7  
   8    private $columnNames;
   9    private $unique;
  10    private $table;
  11    private $indexType;
  12  
  13    public function setIndexType($index_type) {
  14      $this->indexType = $index_type;
  15      return $this;
  16    }
  17  
  18    public function getIndexType() {
  19      return $this->indexType;
  20    }
  21  
  22    public function setProperty($property) {
  23      $this->property = $property;
  24      return $this;
  25    }
  26  
  27    public function getProperty() {
  28      return $this->property;
  29    }
  30  
  31    public function setUnique($unique) {
  32      $this->unique = $unique;
  33      return $this;
  34    }
  35  
  36    public function getUnique() {
  37      return $this->unique;
  38    }
  39  
  40    public function setTable(PhabricatorConfigTableSchema $table) {
  41      $this->table = $table;
  42      return $this;
  43    }
  44  
  45    public function getTable() {
  46      return $this->table;
  47    }
  48  
  49    public function setColumnNames(array $column_names) {
  50      $this->columnNames = array_values($column_names);
  51      return $this;
  52    }
  53  
  54    public function getColumnNames() {
  55      return $this->columnNames;
  56    }
  57  
  58    protected function getSubschemata() {
  59      return array();
  60    }
  61  
  62    public function getKeyColumnAndPrefix($column_name) {
  63      $matches = null;
  64      if (preg_match('/^(.*)\((\d+)\)\z/', $column_name, $matches)) {
  65        return array($matches[1], (int)$matches[2]);
  66      } else {
  67        return array($column_name, null);
  68      }
  69    }
  70  
  71    public function getKeyByteLength() {
  72      $size = 0;
  73      foreach ($this->getColumnNames() as $column_spec) {
  74        list($column_name, $prefix) = $this->getKeyColumnAndPrefix($column_spec);
  75        $column = $this->getTable()->getColumn($column_name);
  76        if (!$column) {
  77          $size = 0;
  78          break;
  79        }
  80        $size += $column->getKeyByteLength($prefix);
  81      }
  82  
  83      return $size;
  84    }
  85  
  86    public function compareToSimilarSchema(
  87      PhabricatorConfigStorageSchema $expect) {
  88  
  89      $issues = array();
  90      if ($this->getColumnNames() !== $expect->getColumnNames()) {
  91        $issues[] = self::ISSUE_KEYCOLUMNS;
  92      }
  93  
  94      if ($this->getUnique() !== $expect->getUnique()) {
  95        $issues[] = self::ISSUE_UNIQUE;
  96      }
  97  
  98      // A fulltext index can be of any length.
  99      if ($this->getIndexType() != 'FULLTEXT') {
 100        if ($this->getKeyByteLength() > self::MAX_INNODB_KEY_LENGTH) {
 101          $issues[] = self::ISSUE_LONGKEY;
 102        }
 103      }
 104  
 105      return $issues;
 106    }
 107  
 108    public function newEmptyClone() {
 109      $clone = clone $this;
 110      $this->table = null;
 111      return $clone;
 112    }
 113  
 114  }