1 files changed, 161 insertions, 0 deletions
diff --git a/classes/backends/MaleteDb.php b/classes/backends/MaleteDb.php
new file mode 100644
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+++ b/classes/backends/MaleteDb.php
@@ -0,0 +1,161 @@
+<?php
+
+/**
+ * Malete implementation of IsisDb.
+ *
+ * @warning
+ *   This implementation is currently outdated and lacks
+ *   basic functionalities such as subfield handling and
+ *   therefore it's use is not recommended.
+ */
+class MaleteDb implements IsisDb {
+  /**
+   * @var $fdt
+   *   Field description table.
+   */
+  var $fdt;
+
+  /**
+   * @var $db
+   *   Database resource.
+   */
+  var $db;
+
+  /**
+   * @var $format
+   *   Database format, derived from $schema.
+   */
+  var $format;
+
+  /**
+   * @var $log
+   *   Class action log.
+   */
+  var $log;
+
+  /**
+   * Constructor.
+   *
+   * @see IsisDb::__construct()
+   */ 
+  public function __construct($schema) {
+    // Save db schema.
+    $this->format = $schema;
+
+    // Setup $fdt used by malete.
+    foreach ($schema['fields'] as $field => $info) {
+      $this->fdt[$field] = $info['name'];
+    }
+
+    // Open a database connection.
+    $this->db = new Isis_Db($this->fdt, $schema['db']['name'], new Isis_Server());
+    if (!$this->db->srv->sock) {
+      return FALSE;
+    }
+  }
+
+  /**
+   * Read an entry.
+   *
+   * @see IsisDb::read()
+   *
+   * @todo
+   *   Subfield handling.
+   */  
+  public function read($id) {
+    if (!is_numeric($id)) {
+      return FALSE;
+    }
+    if ($results !== FALSE) {
+      $results = $this->db->read($id);
+      return $this->tag($results);
+    }
+    else {
+      return FALSE;
+    }
+  }
+
+  /**
+   * Return number of entries in the database.
+   *
+   * The Malete API doen't implement such feature so we
+   * have to emulate it by iterating over all entries
+   * until MaleteDb::read() returns FALSE.
+   *
+   * @see IsisDb::entries()
+   */  
+  public function entries() {
+    // The first entry in a malete database has id 1 and
+    // not 0, therefore $id's initial value should be 1.
+    $id = 1;
+    while($this->db->read($id)) {
+      $id++; 
+    }
+    return $id - 1;
+  }
+
+  /**
+   * Return an example schema.
+   *
+   * @see IsisDb::example()
+   */  
+  public function example() {
+    return SchemaDb::example();
+  }
+
+  /**
+   * Check configuration.
+   *
+   * @see IsisDb::check()
+   */  
+  public function check($schema, $section = NULL) {
+    // Check API availability.
+    if (!class_exists('Isis_Db')) {
+      throw new Exception('Could not find Isis_Db class. Please check your malete installation.');
+      return FALSE;
+    }
+
+    // Check schema configuration.
+    return SchemaDb::check($schema, $section);
+  }
+
+  /**
+   * Tag results of a db query.
+   *
+   * This function converts the keys of query result from field numbers
+   * to names and and also puts repetition fields into place as Malete
+   * deals with field repetition by using a 'tag' property in the resulting
+   * query object. 
+   *
+   * @param $results
+   *   Database query results.
+   *
+   * @return
+   *   Tagged database result.
+   */
+  function tag($results) {
+    foreach ($results->val as $key => $value) {
+      $field = $results->tag[$key];
+      $name  = $this->format['fields'][$field]['name'];
+
+      // Handles field repetition.
+      if ($this->format['fields'][$field]['repeat']) {
+        $data[$name][] = $value;
+      }
+      else {
+        $data[$name] = $value;
+      }
+    }
+    return $data;
+  }
+
+  /**
+   * Class logger.
+   *
+   * @param $message
+   *   Log message.
+   */
+  function logger($message) {
+    $this->log[] = $message;
+  }
+}