Initial commit

#pma/libraries/plugins/import/ShapeFile.php

@@ -0,0 +1,100 @@
+<?php
+/* vim: set expandtab sw=4 ts=4 sts=4: */
+/**
+ * This class extends ShapeFile class to cater the following phpMyAdmin
+ * specific requirements.
+ *
+ * @package    PhpMyAdmin-Import
+ * @subpackage ESRI_Shape
+ */
+namespace PMA\libraries\plugins\import;
+
+/**
+ * 1) To load data from .dbf file only when the dBase extension is available.
+ * 2) To use PMA_importGetNextChunk() functionality to read data, rather than
+ *    reading directly from a file. Using
+ *    PMA\libraries\plugins\import\ImportShp::readFromBuffer() in place of fread().
+ *    This makes it possible to use compressions.
+ *
+ * @package    PhpMyAdmin-Import
+ * @subpackage ESRI_Shape
+ */
+class ShapeFile extends \ShapeFile
+{
+    /**
+     * Returns whether the 'dbase' extension is loaded
+     *
+     * @return boolean whether the 'dbase' extension is loaded
+     */
+    private function _isDbaseLoaded()
+    {
+        return extension_loaded('dbase');
+    }
+
+    /**
+     * Loads ESRI shape data from the imported file
+     *
+     * @param string $FileName not used, it's here only to match the method
+     *                         signature of the method being overridden
+     *
+     * @return void
+     * @see ShapeFile::loadFromFile()
+     */
+    public function loadFromFile($FileName)
+    {
+        $this->_loadHeaders();
+        $this->_loadRecords();
+        if ($this->_isDbaseLoaded()) {
+            $this->_closeDBFFile();
+        }
+    }
+
+    /**
+     * Loads metadata from the ESRI shape file header
+     *
+     * @return void
+     * @see ShapeFile::_loadHeaders()
+     */
+    public function _loadHeaders()
+    {
+        ImportShp::readFromBuffer(24);
+        $this->fileLength = loadData("N", ImportShp::readFromBuffer(4));
+
+        ImportShp::readFromBuffer(4);
+        $this->shapeType = loadData("V", ImportShp::readFromBuffer(4));
+
+        $this->boundingBox = array();
+        $this->boundingBox["xmin"] = loadData("d", ImportShp::readFromBuffer(8));
+        $this->boundingBox["ymin"] = loadData("d", ImportShp::readFromBuffer(8));
+        $this->boundingBox["xmax"] = loadData("d", ImportShp::readFromBuffer(8));
+        $this->boundingBox["ymax"] = loadData("d", ImportShp::readFromBuffer(8));
+
+        if ($this->_isDbaseLoaded() && $this->_openDBFFile()) {
+            $this->DBFHeader = $this->_loadDBFHeader();
+        }
+    }
+
+    /**
+     * Loads geometry data from the ESRI shape file
+     *
+     * @return boolean|void
+     * @see ShapeFile::_loadRecords()
+     */
+    public function _loadRecords()
+    {
+        global $eof;
+        ImportShp::readFromBuffer(32);
+        while (true) {
+            $record = new ShapeRecord(-1);
+            $record->loadFromFile($this->SHPFile, $this->DBFFile);
+            if ($record->lastError != "") {
+                return false;
+            }
+            if ($eof) {
+                break;
+            }
+
+            $this->records[] = $record;
+        }
+    }
+}