1 files changed, 158 insertions, 0 deletions
diff --git a/classes/backends/PhpIsisDb.php b/classes/backends/PhpIsisDb.php
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+++ b/classes/backends/PhpIsisDb.php
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+<?php
+
+/**
+ * PHP-Isis 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+ *   This implementation is currently outdated and lacks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 PhpIsisDb implements IsisDb {
+  /**
+   * @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 $fdt.
+    foreach ($schema['fields'] as $field => $info) {
+      $this->fdt[$field] = $info['name'];
+    }
+
+    // Open the database.
+    $name     = $schema['db']['name'];
+    $this->db = isis_open(Cinisis::file("$name/$name", 'db'));
+  }
+
+  /**
+   * Read an entry.
+   *
+   * The PHP-Isis API doen't implement such feature so we
+   * have to emulate it by geting all entries and using
+   * isis_data_seek() to get the desired record.
+   *
+   * @see IsisDb::read()
+   *
+   * @todo
+   *   Subfield handling.
+   */    
+  public function read($id) {
+    $results = isis_search('$', $this->db);
+    if (!isis_data_seek($results, $id - 1)) {
+      return FALSE;
+    }
+
+    // Tag results.
+    $data = $this->tag(isis_fetch_array($results));
+
+    // Charset conversion.
+    array_walk_recursive($data, array(__CLASS__, 'charset'));
+
+    // Return the result.
+    return $data;
+  }
+
+  /**
+   * Return number of entries in the database.
+   *
+   * @see IsisDb::entries()
+   */    
+  public function entries() {
+    return isis_last_mfn($this->db);
+  }
+
+  /**
+   * Return an example schema.
+   *
+   * @see IsisDb::example()
+   */    
+  public function example() {
+    return SchemaDb::example();
+  }
+
+  /**
+   * Check configuration.
+   *
+   * @see IsisDb::check()
+   */  
+  static function check($schema, $section = NULL) {
+    // Check API availability.
+    if (!function_exists('isis_open')) {
+      throw new Exception('Could not find function isis_open. Please check your php-isis installation.');
+      return FALSE;
+    }
+
+    // Check schema configuration.
+    return SchemaDb::check($schema, $section);
+  }
+
+  /**
+   * Tag results of a db query.
+   *
+   * This function converts the keys of query result from field
+   * numbers to names.
+   *   
+   * @param $results
+   *   Database query results.
+   *
+   * @return
+   *   Tagged database result.
+   */
+  function tag($results) {
+    foreach ($results as $key => $value) {
+      if ($key != 'mfn') {
+        $name        = $this->format['fields'][$key]['name'];
+        $data[$name] = $value;
+      }
+    }
+
+    return $data;
+  }
+
+  /**
+   * Charset conversion.
+   *
+   * Converts a string from the database charset to UTF-8.
+   *
+   * @param $data
+   *   String to be converted.
+   *
+   * @return
+   *   String converted to UTF-8.
+   */
+  function charset(&$data) {
+    $data = iconv($this->format['db']['charset'], 'UTF-8', $data);
+  }  
+
+  /**
+   * Class logger.
+   *
+   * @param $message
+   *   Log message.
+   */
+  function logger($message) {
+    $this->log[] = $message;
+  }
+}