Adding IsisEntryIterator

1 files changed, 66 insertions, 0 deletions

diff --git a/classes/iterators/IsisEntryIterator.php b/classes/iterators/IsisEntryIterator.php
new file mode 100644
index 0000000..6a1d72c
--- /dev/null
+++ b/classes/iterators/IsisEntryIterator.php
@@ -0,0 +1,66 @@
+<?php
+
+/**
+ * Isis entry iterator. Iterates over all entries in
+ * the database.
+ */
+class IsisEntryIterator implements Iterator
+{
+  private $start;
+  private $entry;
+  private $entries;
+
+  /**
+   * Constructor.
+   *
+   * @param $class
+   *   Instance of IsisConnector or child class.
+   *
+   * @param $entry
+   *   Start entry number to iterate from.
+   */ 
+  public function __construct($class, $entry = 1) {
+    // Read the first value.
+    $class->read($entry);
+
+    // Setup.
+    $this->class   = $class;
+    $this->entry   = $this->start = $entry;
+    $this->entries = $class->entries;
+  }
+
+  /**
+   * Rewind the Iterator to the first element.
+   */
+  function rewind() {
+    $this->entry = $this->start;
+  }
+
+  /**
+   * Return the key of the current element.
+   */
+  function key() {
+    return $this->entry;
+  }
+
+  /**
+   * Return the current element.
+   */
+  function current() {
+    return $this->class->result;
+  }
+
+  /**
+   * Move forward to next element.
+   */
+  function next() {
+    $this->class->read(++$this->entry);
+  }
+
+  /**
+   * Check if there is a current element after calls to rewind() or next().
+   */
+  function valid() {
+    return $this->entry <= $this->entries;
+  }  
+}