1 files changed, 196 insertions, 0 deletions
diff --git a/classes/Cinisis.php b/classes/Cinisis.php
new file mode 100644
index 0000000..8771b21
--- /dev/null
+++ b/classes/Cinisis.php
@@ -0,0 +1,196 @@
+<?php
+
+/**
+ * Cinisis main class.
+ */
+class Cinisis {
+  /**
+   * @var $db
+   *   Database resource.
+   */  
+  var $db;
+
+  /**
+   * @var $implementation
+   *   Database implementation.
+   */
+  var $implementation;
+
+  /**
+   * Constructor.
+   *
+   * @param $config
+   *   Optional parameter to set alternative config file or array
+   *   with configuration.
+   */   
+  function __construct($config = NULL) {
+    $this->open($config);
+  }
+
+  /**
+   * Open an ISIS database.
+   *
+   * @param $config
+   *   Optional parameter to set alternative config file or array
+   *   with configuration.
+   */
+  public function open($config)
+  {
+    try {
+      // Check main configuration.
+      $config = $this->parse($this->file($config));
+
+      // Set database implementation.
+      $this->implementation = $config['implementation'] .'Db';
+
+      // Check database schema.
+      $schema = $this->parse($this->file($config['database'] .'.yaml', 'schemas'), $this->implementation);
+    } catch (Exception $e) {
+      echo __CLASS__ .' caught exception: ', $e->getMessage(), "\n";
+      return FALSE;
+    }
+
+    // Setup database connection.
+    $this->db = new $this->implementation($schema);
+  }
+
+  /**
+   * Config file load.
+   *
+   * @param $file
+   *   Config file.
+   *
+   * @return
+   *   Array with configuration or FALSE if error.
+   */
+  public function load($file) {
+    if (!file_exists($file)) {
+      throw new Exception('Config '. $file .' not found.');
+      return FALSE;
+    }
+
+    // Load configuration.
+    return Spyc::YAMLLoad($file);
+  }
+
+  /**
+   * Parse configuration.
+   *
+   * @param $config
+   *   Config file or array with configuration.
+   *
+   * @param $class
+   *   Configuration class name.
+   *
+   * @return
+   *   Array with configuration or FALSE on error.
+   */
+  public function parse($config, $class = __CLASS__) {
+    // Load configuration if needed.
+    if (!is_array($config)) {
+      $config = $this->load($config);
+    }
+
+    // Check configuration.
+    return call_user_func(array($class, 'check'), $config);
+  }
+
+  /**
+   * Check configuration.
+   *
+   * @param $config
+   *   Config file or array with configuration.
+   *
+   * @return
+   *   Array with configuration or FALSE on error.
+   */  
+  static function check($config) {
+    // Set default database backend if needed.
+    if (!isset($config['implementation'])) {
+      $config['implementation'] = 'PhpIsis';
+    }
+
+    // Check database configuration.
+    if (!isset($config['database'])) {
+      throw new Exception('No database set on configuration.');
+      return FALSE;
+    }
+
+    return $config;
+  }
+
+  /**
+   * Get library base folder.
+   *
+   * @return
+   *   Return base folder.
+   */
+  static function base() {
+    return dirname(__FILE__) .'/../';
+  }
+
+  /**
+   * Get a file path.
+   *
+   * @param $config
+   *   Config file name (either relative to the library or absolute)
+   *   or array with configuration.
+   *
+   * @param $section
+   *   Config file section (ignored for absolute files).
+   *
+   * @return
+   *   Return the assembled file path.
+   */
+  static function file($config = NULL, $section = 'config') {
+    // Check config format (array, NULL or relative config path).
+    if (is_array($config)) {
+      return $config;
+    }
+    elseif ($config == NULL) {
+      $config = "$section/config.yaml";
+    }
+    elseif (substr($config, 0, 1) != '/') {
+      $config = "$section/$config";
+    }
+
+    return call_user_func(array(__CLASS__, 'base')) .'/'. $config;
+  }
+
+  /**
+   * Whether to join field and subfields in a single array.
+   *
+   * @param $format
+   *   Database format.
+   *
+   * @return
+   *   Boolean.
+   */
+  static function join_subfields($format) {
+    if ($format['db']['join_subfields']) {
+      return TRUE;
+    }
+
+    return FALSE;
+  }
+
+  /**
+   * Determine the main field name depending on db configuration.
+   *
+   * @param $key
+   *   Field key.
+   *
+   * @param $format
+   *   Database format.
+   *
+   * @return
+   *   Main field name, 'field' by default.
+   */
+  static function main_field_name($format, $key) {
+    if (self::join_subfields($format)) {
+      return $format['fields'][$key]['name'];
+    }
+
+    return 'field';
+  }
+}