Version 1

[yaffs-website] / vendor / doctrine / cache / lib / Doctrine / Common / Cache / SQLite3Cache.php

diff --git a/vendor/doctrine/cache/lib/Doctrine/Common/Cache/SQLite3Cache.php b/vendor/doctrine/cache/lib/Doctrine/Common/Cache/SQLite3Cache.php
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+++ b/vendor/doctrine/cache/lib/Doctrine/Common/Cache/SQLite3Cache.php
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+<?php
+/*
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * This software consists of voluntary contributions made by many individuals
+ * and is licensed under the MIT license. For more information, see
+ * <http://www.doctrine-project.org>.
+ */
+
+namespace Doctrine\Common\Cache;
+
+use SQLite3;
+use SQLite3Result;
+
+/**
+ * SQLite3 cache provider.
+ *
+ * @since  1.4
+ * @author Jake Bell <jake@theunraveler.com>
+ */
+class SQLite3Cache extends CacheProvider
+{
+    /**
+     * The ID field will store the cache key.
+     */
+    const ID_FIELD = 'k';
+
+    /**
+     * The data field will store the serialized PHP value.
+     */
+    const DATA_FIELD = 'd';
+
+    /**
+     * The expiration field will store a date value indicating when the
+     * cache entry should expire.
+     */
+    const EXPIRATION_FIELD = 'e';
+
+    /**
+     * @var SQLite3
+     */
+    private $sqlite;
+
+    /**
+     * @var string
+     */
+    private $table;
+
+    /**
+     * Constructor.
+     *
+     * Calling the constructor will ensure that the database file and table 
+     * exist and will create both if they don't.
+     *
+     * @param SQLite3 $sqlite
+     * @param string $table
+     */
+    public function __construct(SQLite3 $sqlite, $table)
+    {
+        $this->sqlite = $sqlite;
+        $this->table  = (string) $table;
+
+        list($id, $data, $exp) = $this->getFields();
+
+        return $this->sqlite->exec(sprintf(
+            'CREATE TABLE IF NOT EXISTS %s(%s TEXT PRIMARY KEY NOT NULL, %s BLOB, %s INTEGER)',
+            $table,
+            $id,
+            $data,
+            $exp
+        ));
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    protected function doFetch($id)
+    {
+        if ($item = $this->findById($id)) {
+            return unserialize($item[self::DATA_FIELD]);
+        }
+
+        return false;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    protected function doContains($id)
+    {
+        return null !== $this->findById($id, false);
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    protected function doSave($id, $data, $lifeTime = 0)
+    {
+        $statement = $this->sqlite->prepare(sprintf(
+            'INSERT OR REPLACE INTO %s (%s) VALUES (:id, :data, :expire)',
+            $this->table,
+            implode(',', $this->getFields())
+        ));
+
+        $statement->bindValue(':id', $id);
+        $statement->bindValue(':data', serialize($data), SQLITE3_BLOB);
+        $statement->bindValue(':expire', $lifeTime > 0 ? time() + $lifeTime : null);
+
+        return $statement->execute() instanceof SQLite3Result;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    protected function doDelete($id)
+    {
+        list($idField) = $this->getFields();
+
+        $statement = $this->sqlite->prepare(sprintf(
+            'DELETE FROM %s WHERE %s = :id',
+            $this->table,
+            $idField
+        ));
+
+        $statement->bindValue(':id', $id);
+
+        return $statement->execute() instanceof SQLite3Result;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    protected function doFlush()
+    {
+        return $this->sqlite->exec(sprintf('DELETE FROM %s', $this->table));
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    protected function doGetStats()
+    {
+        // no-op.
+    }
+
+    /**
+     * Find a single row by ID.
+     *
+     * @param mixed $id
+     * @param bool $includeData
+     *
+     * @return array|null
+     */
+    private function findById($id, $includeData = true)
+    {
+        list($idField) = $fields = $this->getFields();
+
+        if (!$includeData) {
+            $key = array_search(static::DATA_FIELD, $fields);
+            unset($fields[$key]);
+        }
+
+        $statement = $this->sqlite->prepare(sprintf(
+            'SELECT %s FROM %s WHERE %s = :id LIMIT 1',
+            implode(',', $fields),
+            $this->table,
+            $idField
+        ));
+
+        $statement->bindValue(':id', $id, SQLITE3_TEXT);
+
+        $item = $statement->execute()->fetchArray(SQLITE3_ASSOC);
+
+        if ($item === false) {
+            return null;
+        }
+
+        if ($this->isExpired($item)) {
+            $this->doDelete($id);
+
+            return null;
+        }
+
+        return $item;
+    }
+
+    /**
+     * Gets an array of the fields in our table.
+     *
+     * @return array
+     */
+    private function getFields()
+    {
+        return array(static::ID_FIELD, static::DATA_FIELD, static::EXPIRATION_FIELD);
+    }
+
+    /**
+     * Check if the item is expired.
+     *
+     * @param array $item
+     *
+     * @return bool
+     */
+    private function isExpired(array $item)
+    {
+        return isset($item[static::EXPIRATION_FIELD]) &&
+            $item[self::EXPIRATION_FIELD] !== null &&
+            $item[self::EXPIRATION_FIELD] < time();
+    }
+}