Major refactoring to make bridge easier to test.

git-svn-id: https://vassalengine.svn.sourceforge.net/svnroot/vassalengine/site-src/trunk@7431 67b53d14-2c14-4ace-a08f-0dab2b34000c

1 files changed, 180 insertions, 0 deletions

diff --git a/src/BridgeImpl.php b/src/BridgeImpl.php
new file mode 100644
index 0000000..df21a89
--- /dev/null
+++ b/src/BridgeImpl.php
@@ -0,0 +1,180 @@
+<?php
+
+#
+# $Id$
+#
+# forum-list bridge 
+# Copyright (C) 2010 Joel Uckelman
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program. If not, see <http://www.gnu.org/licenses/>.
+#
+
+require_once(__DIR__ . '/Bridge.php');
+require_once(__DIR__ . '/Util.php');
+
+class BridgeImpl implements Bridge {
+  protected $db;
+
+  public function __construct(PDO $db) {
+    $this->db = $db;
+    $this->db->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
+  }
+
+  public function getPostId($messageId) {
+    throw_if_null($messageId);
+
+    $sql = 'SELECT post_id FROM posts ' .
+           'WHERE message_id = ' . $this->db->quote($messageId);
+
+    $row = $this->get_exactly_one_row($sql);
+    return $row ? $row['post_id'] : false;
+  }
+
+  public function getMessageId($postId) {
+    throw_if_null($postId);
+
+    $sql = 'SELECT p1.message_id FROM posts AS p1 ' .
+           'LEFT OUTER JOIN posts AS p2 ON (' .
+              'p1.post_id = p2.post_id AND ' .
+              'p1.edit_id < p2.edit_id' .
+           ') WHERE p1.post_id = ' . $postId . ' AND ' .
+           'p2.post_id IS NULL';
+
+    $row = $this->get_exactly_one_row($sql);
+    return $row ? $row['message_id'] : false;
+  }
+
+  public function setPostId($messageId, $postId) {
+    throw_if_null($messageId);
+    throw_if_null($postId);
+
+    $sql = 'UPDATE posts SET ' .
+           'post_id = ' . $postId . ' ' . 
+           'WHERE message_id = ' . $this->db->quote($messageId);
+
+    $count = $this->db->exec($sql);
+
+    if ($count != 1) {
+      throw new Exception('Failed to set post id: ' . $messageId);
+    }
+  }
+
+  public function getDefaultForumId($list) {
+    throw_if_null($list);
+
+    $sql = 'SELECT forum_id FROM forums ' .
+           'WHERE list_name = ' . $this->db->quote($list);
+
+    $row = $this->get_exactly_one_row($sql);
+    return $row ? $row['forum_id'] : false;
+  }
+
+  public function getLists($forumId) {
+    throw_if_null($forumId);
+
+    $sql = 'SELECT list_name FROM lists ' .
+           'WHERE forum_id = ' . $forumId;
+
+    $result = $this->db->query($sql);
+
+    $rows = $result->fetchAll(PDO::FETCH_COLUMN);
+    $result->closeCursor();
+    return $rows;
+  }
+
+  public function reserveEditId($postId) {
+    throw_if_null($postId);
+
+    $sql = 'INSERT INTO posts (post_id) VALUES (' . $postId . ')';
+
+    $count = $this->db->exec($sql);
+    if ($count != 1) {
+      throw new Exception('Failed to register post id: ' . $postId);
+    }
+
+    return $this->db->lastInsertId();
+  }
+
+  public function registerByEditId($editId, $messageId, $inReplyTo) {
+    throw_if_null($messageId);
+
+    $sql = 'UPDATE posts SET ' .
+              'message_id = ' . $this->db->quote($messageId) . ', ' .
+              'in_reply_to = ' . $this->quote($inReplyTo) . ' ' .
+           'WHERE edit_id = ' . $editId;
+
+    $count = $this->db->exec($sql);
+    return $count == 1;
+  }
+
+  public function registerByMessageId($messageId, $inReplyTo) {
+    throw_if_null($messageId);
+
+    $sql = 'INSERT IGNORE INTO posts ' .
+           '(message_id, in_reply_to) ' .
+           'VALUES (' .
+              $this->db->quote($messageId) . ', ' .
+              $this->quote($inReplyTo) .
+           ')';
+
+    $count = $this->db->exec($sql);
+    return $count == 1 ? $this->db->lastInsertId() : false;
+  }
+
+  public function unregisterMessage($editId) {
+    throw_if_null($editId);
+
+    $sql = 'DELETE FROM posts WHERE edit_id = ' . $editId;
+
+    $count = $this->db->exec($sql);
+
+    if ($count != 1) {
+      throw new Exception('Failed to delete edit id: ' . $editId);
+    }
+  }
+
+  public function removePost($postId) {
+    throw_if_null($postId);
+
+    $sql = 'DELETE FROM posts WHERE post_id = ' . $postId;
+    
+    $count = $this->db->exec($sql);
+
+    return $count > 0;
+  }
+
+  protected function get_exactly_one_row($sql) {
+    $result = $this->db->query($sql);
+
+    $rows = $result->fetchAll(PDO::FETCH_ASSOC);
+    $result->closeCursor();
+    
+    switch (count($rows)) {
+    case 0:
+      return false;
+
+    case 1:
+      return $rows[0];
+
+    default:
+      throw new Exception("Too many rows returned: $sql");
+    }
+  }
+
+  protected function quote($arg) {
+    return $arg === null ? 'NULL' : $this->db->quote($arg);
+  }
+}
+
+?>